Oasis Concepts Heating System Diesel and AC Heating System for Recreational Vehicles and Yachts User Manual
OASIS™ Heating Module  
Installation and  
Operating Manual  
Diesel and AC Heating System  
for Recreational Vehicles and Yachts  
CSA TIL R-17  
ANSI/UL307A  
CAN/CSA-C22.2 No.165  
 
Table of Contents  
Section 1, Overview...................................................1-1  
1.1  
1.2  
1.3  
1.4  
1.5  
1.6  
Unpacking the Heating Module ....................... 1-2  
Protect Your Warranty .................................. 1-2  
Oasis™ Heating Module Features.................... 1-3  
Critical Factors............................................. 1-5  
Equipment, Tools and Skills ........................... 1-6  
Testing and Inspection.................................. 1-7  
Section 2, Mounting the Oasis™ Heating Module .......2-1  
2.1  
2.2  
2.3  
2.4  
2.5  
Before You Begin ......................................... 2-1  
Identifying Your Oasis™ Heating Module Model. 2-2  
Your Mounting Location................................. 2-2  
What NOT to Do........................................... 2-4  
Procedure ................................................... 2-4  
Section 3, Installing the Exhaust System...................3-1  
3.1  
3.2  
Before You Begin ......................................... 3-1  
Mounting Location........................................ 3-1  
Recommended Exhaust Outlet Locations............ 3-1  
Recommendation for Installation ...................... 3-2  
What NOT to Do............................................. 3-4  
Procedure ................................................... 3-4  
3.3  
Section 4, Installing the Fuel System ........................4-1  
4.1  
4.2  
Before You Begin ......................................... 4-1  
Fuel System Operation.................................. 4-1  
Recommendations for Installation..................... 4-1  
What NOT to Do........................................... 4-2  
Procedure ................................................... 4-3  
4.3  
4.4  
Section 5, Installing Fan Heaters...............................5-1  
5.1  
Before You Begin ......................................... 5-1  
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Table of Contents  
5.2  
Fan System Operation...................................5-2  
Features ....................................................... 5-2  
Multiple Zone Heating ..................................... 5-3  
Accessories and Components Needed................ 5-3  
What NOT to Do ...........................................5-4  
Mounting Locations.......................................5-4  
Procedure....................................................5-5  
5.3  
5.4  
5.5  
Section 6, Wiring the Electrical System..................... 6-1  
6.1  
6.2  
6.3  
6.4  
6.5  
6.6  
Before You Begin..........................................6-1  
12 VDC .......................................................6-1  
120 VAC......................................................6-2  
Remote Operating Panel Cable........................6-2  
Main Electronic Control Board.........................6-3  
Distribution Module Zone Control Board  
(Optional)....................................................6-3  
What NOT to Do ...........................................6-4  
6.7  
Section 7, Plumbing the System................................ 7-1  
7.1  
7.2  
7.3  
7.4  
Before You Begin..........................................7-1  
Plumbing Installation.....................................7-1  
What NOT to Do ...........................................7-4  
Installation Procedure ...................................7-4  
Section 8, Operating the Oasis™ Heating Module ...... 8-1  
8.1  
8.2  
8.3  
Features of your Oasis™ Heating Module..........8-1  
Your Heating Module Model............................8-2  
Operating Instructions for the  
Oasis™ Heating Module .................................8-3  
Turning the Power to the  
Oasis™ Heating Module ON............................8-4  
Activating the Burner (Primary)  
8.4  
8.5  
and AC Heat (Secondary) from the  
Remote Operating Panel ................................8-5  
Activating the Cabin Fan Heaters  
8.6  
through the Thermostats ...............................8-6  
Activating the Domestic Hot Water..................8-6  
Activating the Engine Heat.............................8-6  
Functions of the Remote Operating Panel .........8-7  
Functions of the Heating Module Control Panel..8-9  
8.7  
8.8  
8.9  
8.10  
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Installation and Operating Manual for OASIS Heating Module™  
 
Table of Contents  
8.11  
Functions of the Distribution Module (Optional)  
Zone Control Panel......................................8-10  
Maintenance...............................................8-11  
Protecting the Heating Module and  
8.12  
8.13  
Distribution Module (Optional) ......................8-13  
General Troubleshooting ..............................8-13  
8.14  
Section 9, Installing Distribution Module, DM-12  
(optional) ..................................................................9-1  
9.1  
9.2  
9.3  
Installing your Distribution Module (optional) ... 9-1  
Selecting the Module Location........................ 9-1  
Selecting the Distribution Module  
Zone Box Location........................................ 9-2  
Plumbing Installation.................................... 9-3  
Filling/Purging the heating loop...................... 9-7  
Electrical Connection .................................... 9-9  
Distribution Module Zone Control Board..........9-10  
Inspection and Testing.................................9-13  
Hot water temperature adjustment................9-13  
9.4  
9.5  
9.6  
9.7  
9.8  
9.9  
Warranty Information & Warranty Card  
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Table of Contents  
List of Figures  
Figure 1-1  
Figure 1-2  
Oasis™ Module ........................................1-1  
Oasis™ Heating and Distribution Module......1-5  
Figure 2-1  
Figure 2-2  
Module Dimensions ..................................2-3  
Module Mounting Brackets.........................2-5  
Figure 3-1  
Figure 3-2  
Figure 3-7  
Installing the Exhaust System  
(Bottom Exhaust).....................................3-6  
The Exhaust Hole Location & Mounting  
Template ................................................3-6  
The Exhaust Goose neck Configuration........3-7  
Figure 5-1  
Figure 5-2  
Wiring the Fan’s Aquastat..........................5-2  
Mounting a Spacesaver Fan .......................5-6  
Figure 5-3  
Figure 6-1  
Installing a Relay for Add’l Fan Amperage....5-6  
System Wiring.........................................6-3  
Figure 7-1  
Figure 7-2  
Heating Module........................................7-3  
Three Approved Methods of Installing  
Heater Hose (consult ITR for alternative  
methods and products) .............................7-5  
Figure 8-1  
Figure 8-2  
Figure 8-3  
Figure 8-4  
Oasis™ Heating Module.............................8-3  
Heating Module Main Control Panel .............8-4  
Remote Operating Panel............................8-7  
Zone Control Panel................................. 8-11  
Figure 9-1  
Figure 9-2  
Figure 9-3  
Figure 9-4  
Figure 9-5  
Figure 9-6  
Figure 9-7  
Figure 9-8  
Figure 9-9  
Figure 9-10  
Figure 9-11  
Distribution Module ..................................9-2  
Distribution Module Zone box.....................9-2  
Distribution Module Fittings Location...........9-3  
Domestic Hot Water System Plumbing.........9-4  
Engine Heat / Pre-heat System Plumbing.....9-5  
Connecting to the OASIS Heating Module ....9-6  
Connecting two Heating loops ....................9-7  
Initial fill up Oasis system..........................9-8  
Distribution Module Wiring....................... 9-11  
Zone Board Wiring (No Distribution module) . 9-12  
Mixing valve location .............................. 9-13  
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Installation and Operating Manual for OASIS Heating Module™  
 
Section  
1
Overview  
Thank you for purchasing the Oasis™ Heating Module for  
recreational vehicles and yachts.  
The Oasis™ Heating Module is CSA certified only for  
installation into Recreational Vehicles, Manufactured Homes,  
and Mobile housing.  
NOTICE  
This section covers critical information you need to know before  
beginning the installation including how to protect your Warranty,  
and tools and equipment needed.  
Figure 1-1: Oasis™ Heating Module  
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Section 1, Overview  
1.1 Unpacking the Oasis™ Heating Module  
When you receive the Oasis™ Heating Module:  
1
2
Unpack it carefully.  
Check each component against the shipping list to ensure that  
you have everything and that all parts arrived undamaged.  
3
4
5
If you discover any missing or defective parts call ITR  
immediately.  
If you are not installing the Oasis™ Heating Module right away  
secure all components so none will be misplaced.  
Before installing the Oasis™ Heating Module read the rest  
of this Installation and Operating Manual. It contains  
critical information for a proper installation.  
A properly installed Oasis™ Heating Module is essential for several  
reasons:  
• To ensure that you and/or your customers receive satisfactory  
results and enjoy a warm, comfortable environment.  
• To ensure a trouble-free installation, a successful inspection and  
testing process, and ease of future maintenance.  
• To protect your Warranty.  
1.2 Protect Your Warranty  
This document reflects approved installation techniques, methods,  
and materials, and applies only to ITR equipment. The Oasis™  
Heating Module is only guaranteed by ITR if the entire system has  
been installed according to the requirements and recommendations  
set out here.  
This includes:  
• Deviations from the instructions in this Manual.  
• Changes to any piece of ITR-supplied equipment.  
• Substitution of a non-ITR approved component.  
No Warranty will be extended to improper installations. Use of any  
unapproved materials, equipment or installation procedures will  
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The Oasis™ Heating Module  
 
Section 1, Overview  
result in a voided warranty for the entire heating system. Any loss  
of service or damage as a result of any unapproved modification is  
the responsibility of the installer. ITR accepts no liability for any  
damage or loss of service resulting from unapproved modifications.  
1.3 Oasis™ Heating Module Features  
• Efficient  
• Clean  
The Oasis™ Heating Module uses a diesel burner (12 VDC)  
controlled by a multi-functional electronic controller as the primary  
source of heating coolant fluid (anti-freeze and water). Two 1500  
Watt, 120 VAC immersion elements are used as secondary heat  
sources. The Oasis™ Heating Module heats the coolant fluid to  
provide a source of heat for all hydronic space heating needs.  
When used with the Distribution Module (optional) and its integral  
distribution pumps, the Oasis™ Heating Module has the ability to  
circulate the coolant fluid to all space heating areas. It can also  
provide a supply of domestic hot water using the integral heat  
exchanger in the Distribution Module. The Oasis™ also incorporates  
• Quiet  
• Compact  
• Safe  
• Rugged  
• Reliable  
• Economical  
engine heat and preheat functions. (see Figure 1-2:  
Oasis™  
Heating and Distribution Modules).  
Other features of the Oasis™ Heating Module include:  
• A high-temperature, stainless steel burner and stainless steel  
jacket.  
• 9.5 US gallon welded, insulated stainless steel coolant tank that  
minimizes heat loss and optimizes heat recovery.  
• Low coolant level switch on the tank.  
• Easy to install, completely modular and field serviceable with the  
Oasis™ Heating Module hookups and connections easily  
accessible from the front and top of the Heating Module.  
• Quiet operation and low power consumption.  
• Low pressure fuel system with built-in fuel pump.  
• Fuel efficient burner capable of burning a wide variety of diesel-  
based fuels.  
• Exhaust has minimal smoke and smell.  
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Section 1, Overview  
• Fan assisted sealed combustion chamber is designed to use  
outside combustion air.  
• Simple, low amperage draw ignition.  
• Electronically-controlled system with:  
• automatic Safety Shutdown;  
• manual-resettable aquastats for safety overheat protection.  
• LED indicators on the Control Panel for diagnostics.  
• Patented, proprietary flame sensor.  
• Heating Module Remote Operating Panel with ON/OFF switch for  
the diesel burner, AC elements, and engine heat, if installed.  
• Heating Module Control Panel with buttons for Power, Bypass,  
Reset, and indicator LED’s for operational and diagnostic  
information.  
• Distribution Module if installed with built in distribution pumps  
and heat exchanger for heating multiple zones and also  
producing domestic hot water. Heat exchanger also allows  
engine pre-heating as well as using engine waste heat. The Zone  
Board Controls up to five space heating zones.  
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Section 1, Overview  
Figure 1-2: Oasis™ Heating and Distribution Module  
1.4 Critical Factors  
THE INSTALLATION SHALL BE IN ACCORDANCE WITH THE  
REGULATIONS OF AUTHORITIES HAVING JURISDICTION  
The key factors to keep in mind when planning and carrying out the  
installation are:  
Pay attention to the  
notices of “Danger”  
“Warning” “Caution”  
and “Notice” in this  
manual.  
• Mounting location restrictions for the Oasis™ Heating Module,  
optional Distribution Module , and exhaust outlet (to reduce  
noise, vibration, heat loss, etc.).  
• Length, routing and sizing of fluid lines, fuel lines, air-flow  
tubing, exhaust piping and wiring.  
• Unrestricted vent required to draw in 100% outside air for  
combustion.  
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Section 1, Overview  
• Ability for technician to easily access and service the product,  
especially fuel, plumbing, and electrical systems.  
• After installation, ability to purge water and fuel lines and  
inspect/test entire system using the ITR-supplied Inspection  
Check Sheet.  
1.5 Equipment, Tools and Skills  
As the user and/or installer, you must be qualified and authorized to  
do the installation, which requires mechanical aptitude and electrical  
knowledge. Make sure you comply with existing RVIA or ABYC  
industry practices, using the highest and most recent standards and  
codes.  
Good workmanship is essential.  
Please refer back to  
Section 1 – Overview, sub-Section 1.2, Protect Your Warranty.  
You will need the following equipment and tools to install the  
heating system (not supplied). This list does not include optional  
equipment and accessories:  
• Standard tools normally available in a well-equipped shop.  
• Approved fasteners for mounting the heater unit.  
• Steel (or stainless steel) 2” ID exhaust system piping, maximum  
12’ with no bends. (See Section 3 – Installing the Exhaust  
System, for details when bend are present.).  
• Exhaust collar.  
• ITR-muffler with straight-through design.  
• 1/4” supply fuel line, approved rubber or copper.  
• #10 sheet metal screws or wood screws to mount fan units  
inside the occupied areas.  
• Heater hose (to connect optional Distribution Module hose  
fittings to interior fans).  
• Domestic water hose and/or tubing to connect the Distribution  
Module hose fittings to the domestic water system.  
• Overflow tank to connect to the Oasis™ Heating Module with  
clear plastic 3/8” hose; tank must be heavy-duty plastic, with a  
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The Oasis™ Heating Module  
 
Section 1, Overview  
screw-down cap, and sturdy enough to mount firmly to a vertical  
surface.  
• Up to five (5) thermostats (DC compatible) to allow temperature  
regulation of the heating zones when connected to the  
Distribution Module.  
1.6 Testing and Inspection  
After all components have been properly installed according to  
standard practices, RVIA or ABYC standards, and the  
recommendations of this Installation and Operating Manual, the  
Oasis™ Heating Module should be test-operated for inspection  
purposes.  
For your convenience, you can use the pullout Inspection Check  
Sheet in this Manual. The Inspection Check Sheet is divided into  
progressive sections, allowing each phase of the inspection to be  
carried out systematically, and then signed off by authorized  
persons.  
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Section 1, Overview  
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The Oasis™ Heating Module  
 
Section  
2
Mounting – Oasis™ Heating  
Module  
2.1 Before You Begin  
Plan the location of the Oasis™ Heating Module and all its major  
components in advance to ensure the chosen locations are  
compatible with installation requirements and within the technical  
specifications.  
Consider the following factors to help you decide exactly where  
best to mount the Oasis™ Heating Module:  
• Oasis™ Heating Module weight when full (160 lbs).  
• Ventilation requirements.  
• Exhaust outlet location and maximum acceptable length.  
• Thru hull location and waterline (yachts).  
• Potential for vibration and jarring.  
• Length of run from fuel source to heater.  
• Most efficient plumbing runs.  
• Safe and convenient access for maintenance.  
• Number and location of interior fans.  
• Location of other equipment to be installed or connected to  
the Oasis™ Heating Module, including the optional  
Distribution Module, Zone Control Box, heat exchangers,  
overflow tank, batteries, etc.  
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Section 2, Mounting the Oasis™ Heating Module  
Make sure you are familiar with Section 1 – Overview of this  
Manual. If the system is not installed according to specifications  
and with the correct equipment, your Oasis™ Heating Module may  
not operate properly, safety may be compromised, and your  
Warranty may be voided.  
! WARNING  
2.2 Identifying Your Oasis™ Heating  
Module Model  
As the owner, you must be fully aware of the controls and  
operating features particular to your model of the Oasis™ Heating  
Module. This is essential for the proper functioning and life of your  
Oasis™ Heating Module as well as protecting your warranty. Your  
model can be identified by locating the serial number label on the  
outside case of the Oasis™ Heating Module. The serial number  
identifies the model type through the first series of letters and  
numbers.  
The types of Oasis™ Heating Module models are:  
CH50 – Oasis™ Heating Module  
CH35 (“CSA Certification Pending”) – Oasis™ Heating  
Module  
2.3 Your Mounting Location  
Your mounting location should consider the following:  
• Mounting location must be able to support double the gross  
weight of the Oasis™ Heating Module (i.e. 160 lbs. x 2 =  
320lbs./73 KG x 2 = 146 KG) and must be of a non-  
combustible and non absorptive surface.  
• Oasis™ Heating Module is 14”H x 14”W x 30” D. (35.6 cm x  
35.6 cm x 76.1 cm), see Figure 2-1: Module Dimensions.  
• Oasis™ Heating Module must be installed in a compartment  
which is completely isolated from the atmosphere of living  
spaces.  
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The Oasis™ Heating Module  
 
Section 2, Mounting the Oasis™ Heating Module  
• Combustion air must be drawn from an outside source and  
cannot contain any combustible gases.  
• Oasis™ Heating Module must be mounted in an area that  
provides unrestricted access to the front panel. Allow space for  
connection to the fuel and coolant lines, as well as the power  
and exhaust connections. (Minimum of 10” top clearance - top  
exhaust version; minimum of 6” top clearance - bottom  
exhaust version; 0” clearance to all other Oasis™ Heating  
Module surfaces). Allow 1” clearance on the sides for attaching  
the mounting brackets.  
• Mount the unit with the front panel side facing out and  
accessible. Facing out simplifies installation and maintenance.  
• Oasis™ Heating Module must be mounted horizontal and level  
using eight, 1/4” through bolts and 1” diameter fender  
washers, lock washers and nuts.  
Figure 2-1: Module Dimensions  
Oasis™ Heating Module must not be installed or operated in any  
compartment with flammable gases.  
! DANGER  
If the Oasis™ Heating Module is going to be mounted in the engine  
compartment, check for adequate ventilation. When the engine is  
running this area could be under a negative pressure. Make sure  
the air-intake and exhaust hoses have no leaks and are well  
fastened to the heater, muffler and thru-hull fitting. Assembly  
! WARNING  
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Section 2, Mounting the Oasis™ Heating Module  
parts that may cause injury through accidental contact should be  
protected.  
Isolate the unit in a closed compartment so that no air from the  
heater will infiltrate the living areas.  
! DANGER  
• It is recommended that a catchpan be placed under the Oasis™  
Heating Module for containing any unexpected leakage.  
• Choose a sturdy surface in a location that won’t be unduly  
affected by vibration and the jarring of rough roads or rough  
seas.  
• Ensure that the exhaust tubing can be properly and safely  
routed to the outside. The maximum exhaust run for the  
system is 12’.  
2.4 What NOT to Do  
• Don’t mount the Oasis™ Heating Module in the rear of the  
coach or yacht underneath the sleeping area. The sound of the  
Oasis™ Heating Module cycling on and off may disturb light  
sleepers.  
2.5 Procedure  
After choosing the mounting location for the Oasis™ Heating  
Module, mount the module horizontally and level. Secure the  
Oasis™ Heating Module in place (against the wall, floor or a  
mounting platform) using eight (8) x 1/4” through bolts and 1”  
diameter fender washers, lock washers, and nuts. (See Figure 2-2:  
Module Mounting Brackets.).  
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The Oasis™ Heating Module  
 
Section 2, Mounting the Oasis™ Heating Module  
Figure 2-2: Module Mounting Brackets  
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Section 2, Mounting the Oasis™ Heating Module  
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The Oasis™ Heating Module  
 
Section  
3
Installing the Exhaust System  
3.1 Before You Begin  
For efficient and safe operation of the Oasis™ Heating Module follow  
all recommendations for properly installing the exhaust.  
deviations from these must be approved in advance by ITR.  
Any  
Although the heater’s exhaust produces very low carbon monoxide  
emissions, caution is still advised:  
! DANGER  
• Do not operate the Oasis™ Heating Module in an enclosed  
area unless there is adequate ventilation.  
• Isolate the Oasis™ Heating Module in a closed compartment  
so that no air from the unit will infiltrate the living areas.  
Never place any exhaust parts close to combustible material or  
through a combustible wall or ceiling without fireproof protection.  
The exhaust can reach high temperatures.  
3.2 Mounting Location  
If you can’t meet the technical specifications for mounting  
the exhaust, don’t use the Oasis™ Heating Module. The unit  
may perform poorly or become damaged if not installed  
according to specifications.  
Recommended Exhaust Outlet Locations  
The following is recommended for a coach exhaust outlet location:  
• Mount the exhaust outlet outside the coach, not inside the  
heater compartment. Otherwise, exhaust fumes could  
infiltrate the coach from the Oasis™ Heating Module.  
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Section 3, Installing the Exhaust System  
• In a coach, the typical mounting location for the exhaust  
outlet is under the floor of the Oasis™ Heating Module  
compartment, or on the other side of the coach, directly  
across from the module. Keep in mind you cannot exceed 12’  
of exhaust piping, without any bends, or 8’ with two 90°, 2”  
minimum radius bends.  
• Position the outlet of the exhaust pipe so that the exhaust  
exits off the side of the coach, not directly underneath the  
coach or under an opening window, vent or slide-out.  
In a yacht installation, the following is recommended for the exhaust  
outlet location:  
• Mount the exhaust thru hull so that the exhaust fumes cannot  
enter or re-infiltrate any living areas.  
• Make sure that the thru hull is at least 30” above the water  
line with a goose neck rise on the exhaust to help eliminate  
water from getting to the Oasis™ Heating Module through the  
exhaust. If the dual exhaust air-intake thru hull is used,  
ensure that the air-intake is placed between 10 o’clock and  
2 o’clock and also goose-necked to avoid water ingestion, see  
Figure 3-3: The Exhaust Goose Neck Configuration.  
• There needs to be a 1/8" air gap around the exhaust thru hull.  
The standard thru hull is 4" in diameter. The hole for the  
fitting should be 4-1/4". Make sure that the holes for the  
mounting screws have enough material left to properly bite.  
The fitting must be centered in the hole.  
Recommendation for Installation  
The following applies to both a coach and yacht:  
• You may use sweep bends but each 90° bend is equivalent to  
two foot of exhaust piping. For example, if you use two 90°  
bends you must deduct two foot per bend from the maximum  
allowed 12’ straight exhaust pipe length. Therefore you will  
be restricted to 8’ of straight exhaust piping plus the two  
bends. Do not exceed these recommendations.  
• The combustion air must be drawn from outside the coach or  
yacht. The maximum length of the air-intake tubing is 7 feet.  
Do not exceed this recommendation.  
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The Oasis™ Heating Module  
 
Section 3, Installing the Exhaust System  
• Use an ITR-manufactured muffler with a straight-through  
design. No other muffler is acceptable.  
• Exhaust outlet is on the top or bottom (model dependant) of  
the Oasis™ Heating Module, towards the back.  
The exhaust and outlet are HOT and the surrounding areas  
must be thermally shielded and protected from the hot  
surfaces and heat build-up by insulation. Nothing can come  
into inadvertent contact with any part of the exhaust system.  
! DANGER  
• Exhaust must have a minimum of 3” (7.6 cm) clearance from  
all surfaces.  
• Ensure that the exhaust cannot be plugged or restricted.  
• The exhaust fitting on the Oasis™ Heating Module is  
2.0” O.D. and the exhaust pipe used must have a minimum of  
2.0” I.D. throughout its length.  
• All exhaust elbows must be of a large radius design.  
• The exhaust must be supported a minimum of every 3’ of its  
installed length.  
• The exhaust and Oasis™ Heating Module connection point  
must use appropriate clamps and sealing compound to ensure  
that the connections are tight and leak free. The Oasis™  
Heating Module exhaust outlet pipe and the exhaust pipe  
itself must not be distorted or damaged during this process.  
• When the Oasis™ Heating Module is running the connection  
points and the system must be checked for leaks and any  
found must be corrected. Periodically, check the exhaust  
fittings, connections, exhaust tube, and insulation for leaks  
and integrity and correct if required.  
• Appropriate exhaust insulation must be used to cover the  
entire length of any interior exhaust run.  
• Solid stainless steel exhaust tubing or approved exhaust  
tubing is recommended but an approved stainless steel  
flexible exhaust tubing can also be used. If flexible exhaust  
tubing is used, the exhaust tubing must be inspected  
regularly for leaks and deterioration as this type of exhaust  
does not have the life expectancy of solid tubing. Stepped  
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Section 3, Installing the Exhaust System  
band clamps are recommended for joining flex and solid  
tubing as they apply firm, even pressure.  
• In a coach, install an exhaust collar on the exhaust pipe to  
isolate the pipe from the coach frame. This reduces vibration  
and noise and protects the coach from the effects of high  
exhaust temperature, see Figure 3-1: Installing the Exhaust  
system (Bottom Exhaust).  
What NOT to Do  
Section 3, Installing the Exhaust System  
5
Connect the flexible air-intake tubing (2” I.D.) to the air-  
intake fitting on top of the heater. Use a #32 gear clamp  
to attach the tubing to this fitting.  
The other end of the air-intake hose can be installed in 2  
configurations:  
Installation of the air-intake adapter to the  
underside of the RV  
Locate a suitable location to mount the air-intake adapter.  
Drill a 2” hole through the floor. Insert the adapter from  
underneath and use 3 screws to secure against floor. The  
air entrance of the air-intake assembly shall be guarded or  
shielded to exclude rain, snow and debris. Use a #32 gear  
clamp to attach the tubing to this adapter. Ensure the run  
of tubing is as short as possible to facilitate air flow. See  
figure 3-1.  
Installation of the air-intake adapter to the side of  
the RV  
Locate a suitable location to mount the air-intake adapter.  
Drill a 2” hole through the side wall (minimum ¼”,  
maximum 2” wall thickness). Insert the adapter and use 3  
screws to mount against side wall. Use a #32 gear clamp  
to attach the tubing to this adapter. Ensure the run of  
tubing is as short as possible to facilitate air flow. See  
figure 3-1.  
6
7
8
9
Secure both ends of the air-intake tubing with properly  
sized hose clamps to prevent air leaks.  
Make sure the air-intake and exhaust hoses have no leaks  
and are not touching each other.  
Protect the air-intake entrance from water and dirt with a  
guard or shield.  
On a yacht, make sure the thru hull is at least 30” above  
the waterline and the exhaust must be goose-necked, see  
Figure 3-3: The Exhaust Goose Neck Configuration.  
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Section 3, Installing the Exhaust System  
Figure 3-1: Installing the Exhaust System (Bottom Exhaust)  
Figure 3-2: The Exhaust Hole Location & Mounting Template  
3-6  
The Oasis™ Heating Module  
 
Section 3, Installing the Exhaust System  
Figure 3-3: The Exhaust Goose Neck configuration  
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Section 3, Installing the Exhaust System  
3-8  
The Oasis™ Heating Module  
 
Section  
4
Installing the Fuel System  
4.1 Before You Begin  
For efficient and safe operation of the Oasis™ Heating Module,  
follow all recommendations for properly installing the fuel system.  
Any deviations from these must be approved in advance by ITR.  
Use only diesel fuel, furnace oil, or stove oil in the Oasis™ Heating  
Module. DO NOT USE GASOLINE, CRANKCASE OIL, OR ANY OIL  
CONTAINING GASOLINE.  
! DANGER  
Keep fuel lines away from any heat source above 100°F (38°C).  
Keep gasoline and any equipment that uses gasoline away from the  
Oasis™ Heating Module location. The Oasis™ Heating Module is not  
rated for use in an explosive environment.  
Never share the fuel supply to the Oasis™ Heating Module with any  
other fuel-burning device.  
! WARNING  
4.2 Fuel System Installation  
The fuel pump in the Oasis™ Heating Module has a maximum flow  
capacity of 25 GAL/Hr and a maximum pressure of 11.5 psi. A 10  
micron fuel filter is recommended. Select a fuel filter based on these  
requirements.  
Recommendations for Installation  
The Oasis™ Heating Module’s fuel connection is accessed from the  
top of the heater. The fuel inlet, labelled, is located on the top right  
of the Oasis™ Heating Module and consists of a 1/8” NPT threaded  
female fitting. The fuel return, labelled, is located next to the fuel  
inlet and consists of a 1/8” NPT threaded female fitting. Minimum  
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Section 4, Installing the Fuel System  
recommended size for the fuel line is ¼” I.D. The fuel return line  
should return to the fuel supply tank.  
The following is recommended for the fuel system installation:  
The fuel supply from the fuel storage tank to the fuel inlet must be  
from a dedicated fuel pickup on the top of the tank.  
NOTICE  
• The fuel supply line should be installed with minimal rise from  
the fuel tank. The total rise from the bottom of the pickup  
tube to the fuel inlet on the Oasis™ should not exceed 60”.  
There are no minimum clearance requirements between the  
fuel tank and the Oasis™ .  
The fuel line must be run and secured so as to prevent damage,  
chafing and kinking during normal operation.  
! CAUTION  
• All fuel line connection points and hoses must use suitable  
clamps and/or sealant and must be checked for leaks on the  
initial installation and also periodically as part of normal  
maintenance.  
• A primary, UL and/or CSA approved fuel oil filter (not  
provided) must be installed inline in the fuel supply hose,  
between the tank and the Oasis™ Heating Module, in a  
manner that ensures easy access for maintenance.  
A
secondary fuel filter is mounted inside the Heating Module  
case. Both filters must be inspected and replaced as required  
as part of normal maintenance.  
• Fuel line hose used must be appropriate for your  
requirements. It is strongly recommended that the hoses  
have permanently installed end fittings.  
4.3 What NOT to Do  
• Don’t allow the fuel or the fuel lines to become contaminated  
with foreign material.  
• Don’t allow the fuel lines to become damaged or constricted.  
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The Oasis™ Heating Module  
 
Section 4, Installing the Fuel System  
Ensure that fuel lines are always protected from contamination by  
! CAUTION  
foreign material. When installing or servicing, seal off ends to  
prevent contamination. After installing, you may also wish to flush  
the fuel line to rid of it air and any foreign material.  
4.4 Procedure  
To complete the fuel system installation:  
1
Install the inline fuel filter. The optimal location is on a  
compartment wall next to the Oasis™ Heating Module,  
inline between the fuel tank and the Oasis™ Heating  
Module.  
2
3
4
Connect the fuel line to the dedicated fitting on the main  
diesel fuel tank.  
Inspect the supply fuel line for any loose connections or  
damage. Fittings must be airtight.  
If desired, install a shut-off valve on the tank side of the  
fuel filter to allow shutdown and filter service.  
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Section 4, Installing the Fuel System  
4-4  
The Oasis™ Heating Module  
 
Section  
5
Installing Fan Heaters – with  
“Distribution Module” Only  
5.1 Before You Begin  
ITR makes a variety of fan heaters for individual cabins or  
areas. There are Cabin heaters and Spacesaver heaters  
(where space is limited). These heaters draw as little as 0.9  
amps and deliver 140 cfm. These heaters also come in high  
output versions and the above numbers are increased by  
40%. They should be mounted as close to the floor as  
possible. They have a built-in aquastat (optional), which  
turns on the fan when the water running through it reaches  
120°F (49°C).  
The Defrost Heater, provides up to 28,000 BTU/h and uses a  
three speed fan, 200/275/450 cfm, 40/55/100 watts.  
Note: A limited number of fan heaters can be used  
with the Oasis™ Heating and Distribution Modules.  
Only the installation of ITR fan heaters is covered in this  
Manual.  
NOTICE  
If you are installing non-ITR fan heaters, you must obtain  
prior approval from ITR. You must check the fans’ total  
amperage draw to ensure they will be compatible with the  
Zone Control Board (optional), as well as flow capacity to  
ensure that each fan meets system requirements.  
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Section 5, Installing Fan Heaters  
5.2 Fan System Operation  
ITR fans consist of a 12 VDC brushless fan and heater coil  
similar to a radiator.  
When the heater unit comes on, the fan draws ambient air  
from the interior, blows it through the heater coil and back  
into the interior through a vent. There must be an input and  
output vent for each fan unit.  
Features  
• ITR heater fans can be supplied with a built-in  
aquastat, which prevents fan operation until the  
system has reached minimum operating temperature.  
The aquastat can be deleted to meet particular  
installation requirements, but it is recommended that  
all systems be installed with the air fan aquastat.  
Figure 5-1 shows how to wire up the aquastat in a fan.  
Figure 5-1: Wiring the Fan’s Aquastat  
5-2  
The Oasis™ Heating Module  
 
Section 5, Installing Fan Heaters  
• If a “passive” radiant heat system is desired (i.e.  
baseboard or fin and tube configurations), consult ITR  
for recommended installation procedures and design.  
Multiple Zone Heating  
The Oasis™ Heating Module can supply heat up to five  
interior zones using the Distribution Module (Optional).  
Refer to Section 9 – Installing Distribution Module.  
Up to five thermostats (positive DC compatible) can be  
installed to allow temperature regulation of the zones. The  
thermostat controls the fan heater.  
For larger installations, consult ITR.  
Accessories and Components Needed  
In addition to the fans themselves, you will need at least  
some of the following optional accessories and equipment  
which are not supplied but which can be purchased  
separately.  
• Thermostats — thermostats can be installed in the  
interior.  
• Air Outlet Vents — covers that are installed flush  
with the wall to vent heat for the installed heater unit.  
• Fan Guards — to protect the fan blades from  
damage, recommended for fans installed in storage  
areas or other accessible areas where something could  
contact the fans.  
• Screws — #10 sheet metal screws or wood screws to  
mount the fan units. See Figure 5-2: Mounting a  
Spacesaver Fan.  
• Two-Speed Fan Switches – to enable low and high-  
speed settings from inside the coach or yacht; for use  
with the ITR Cabin heater and Spacesaver fan.  
• Three-Speed Fan Switches — to enable low,  
medium and high-speed settings from inside the coach  
or yacht; for use with the ITR defrost heater.  
• Air Ducting — to allow you to install fans in a remote  
location (i.e. not directly adjacent to the interior space  
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Section 5, Installing Fan Heaters  
to be heated) and duct the heated air to its output  
location. Also, air outlet plates to allow you to  
install ducting for one, two or three separate outlets  
(e.g. you can use one fan to heat two different areas  
by installing a dual air outlet plate).  
5.3 What NOT to Do  
• Don’t install more fans that require more heat than  
the Heating and Distribution Module can produce.  
Your system will not run effectively. (If you choose to  
use a higher-draw fan motor (more than 5 amps),  
install a relay to handle the extra load; see Figure 5-3:  
Installing a Relay for Additional Fan Amperage.)  
• Don’t mount the return air outlet too close to the  
fan’s air intake source.  
5.4 Mounting Locations  
Carefully choose the mounting locations of your fans:  
• Locate the fans to evenly heat the zone.  
• Provision must be made to protect water lines from  
ITR  
can  
suggest  
freezing.  
optimal fan locations  
if you provide a floor  
plan of your coach  
or yacht.  
• Install fan at floor level or very near floor level, in order  
to optimize circulation.  
• Allow a minimum 16 square inch (100 cm sq.) opening in  
the fan heaters’ mounting compartment to allow sufficient  
intake of air.  
ITR’s Spacesaver fan (pictured at left) has two stainless steel  
mounting brackets welded to the side of the case. It is  
designed to be mounted horizontally on a flat surface.  
This fan can also be ordered with a right-hand or left-hand  
hose configuration.  
ITR’s standard cabin heater fan comes with loose stainless  
steel brackets. The fan can be mounted on the floor or on  
the wall, either flat or on its side.  
5-4  
The Oasis™ Heating Module  
 
Section 5, Installing Fan Heaters  
The thermostat should not be mounted on walls outside of  
the zone because that could cause false temperature  
readings. Mount on interior walls and bulkheads, away from  
windows, heater vents and cabin fan heaters.  
5.5 Procedure  
After choosing the appropriate mounting location and  
configuration:  
1
Mount the fan using #10 sheet metal screws or wood  
screws, see Figure 5-2: Mounting a Spacesaver Fan.  
2
3
If you are using ducting and a dual air outlet plate for any  
fan, limit the total length of duct for both outlets to 36” for  
optimum air output.  
Select the appropriate mounting location for the  
thermostat, as well as any fan speed switches. You will  
wire these up to the Zone Control Board in Section 9 –  
Installing the Distribution Module.  
4
5
The zone control board can control up to 5 zones. The  
cabin fan 1 lead (orange) can supply up to a maximum of  
10 Amps. The other cabin fan leads 2-5 can supply up to a  
maximum of 5 Amps each. The total current draw is not to  
exceed 18 Amps for all cabin fan leads.  
If the system requires higher amperage draws, install a  
separate relay to power the fans. This relay will use the  
existing fan circuit as a signal and must be wired to a  
secondary power source (not the heater’s control board).  
See Figure 5-3: Installing a Relay for Additional Fan  
Amperage.  
6
To install plumbing lines to the fans, see Section 7 –  
Plumbing the System.  
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Section 5, Installing Fan Heaters  
Figure 5-2: Mounting a Spacesaver Fan  
Figure 5-3: Installing a Relay for Additional Fan Amperage  
5-6  
The Oasis™ Heating Module  
 
Section  
6
Wiring the Electrical System  
6.1 Before You Begin  
The Oasis™ Heating Module and its electrical Control Board are pre-  
wired and have been thoroughly tested together as a unit.  
To review the wiring system for the Oasis™ Heating Module, refer  
to the wiring diagram at the end of this Section 6, Figure 6-1:  
System Wiring.  
All electrical connections and wiring must comply with normally-  
accepted 12 VDC and 120 VAC wiring practices, local regulations,  
and ABYC/RVIA standards. Only a qualified electrical installer  
should complete the wiring. All field wiring is to be in accordance  
with CSA Standard C22.1, Canadian Electrical Code Part l or the  
National Electrical Code, ANSI/NFPA 70.  
! WARNING  
6.2 12 VDC  
The following apply to the 12 VDC connections for the Oasis™  
Heating Module:  
• There is one paired set of 12 VDC electrical connections on the  
top right of the Oasis™ Heating Module. They consist of the  
primary DC positive (red) and negative (black) connection and  
are 14 gauge stranded copper wires.  
Primary DC power should originate from a dedicated connection on  
the house battery bank. A 20 amp fuse or breaker must be  
included close to and inline from the battery to the positive (red)  
connection on the Oasis™ Heating Module. The primary power wire  
gauge must be sized to permit no more than a 3% voltage drop  
from the battery to the Oasis™ Heating Module.  
! WARNING  
• A properly-shielded power system is required for safe, trouble-  
free operation.  
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Section 6, Wiring the Electrical System  
6.3 120 VAC  
• The Oasis™ Heating Module is equipped with two 1500 watt,  
120 VAC immersion elements (other voltages and frequencies  
are available). The connections for the electrical supply are on  
the top left side of the Oasis™ Heating Module, under a cover,  
labeled AC power.  
• The power wires for the AC immersion elements are three 14  
gauge stranded copper leads that use standard AC color code  
(black-hot, white–neutral, green-ground).  
These are to be  
connected using standard 120 VAC electrical connectors and  
terminals.  
• There are two sets of power wires, one set with black heat  
shrink (primary) and one set without heat shrink (secondary).  
Each individual set must be connected to a separate AC circuit  
breaker. The primary set is connected to the single AC element  
side of the Oasis™ Heating Module. The secondary set of wires  
is connected to the other AC element. If only one AC circuit  
breaker is available, you must connect to the primary wire set  
only. Once the connections are completed, the wires are to be  
inserted back into their compartment and the cover secured.  
• The ground wire (green) is shared between the two connections.  
Do not operate the electric immersion elements until water is added  
to the Oasis™ Heating Module and Distribution Module, and all  
trapped air has been removed.  
NOTICE  
6.4 Remote Operating Panel Cable  
• One connection on top of the Oasis™ Heating Module is a multi-  
wire, sheathed cable with a 9 pin connector. This connects to a  
matching connector on a short adapter cable. The other side of  
the cable has a 10 pin connector that connects to a 25’ remote  
cord. This remote cord then plugs directly into the Remote  
Operating Panel. Refer to Figure 6-1: System Wiring.  
• If the Distribution Module is used, refer to Section 9, Installing  
the Distribution Module.  
6-2  
The Oasis™ Heating Module  
 
Section 6, Wiring the Electrical System  
Figure 6-1 System wiring  
6.5 Main Electronic Control Board  
The main electronic Control Board is mounted onboard the Oasis™  
Heating Module itself. It has no user adjustable components.  
NOTICE  
6.6 Distribution Module Zone Control  
Board (optional)  
• The Distribution Module is controlled by a separate Zone Control  
Board. See Section 9, Installing the Distribution Module.  
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Section 6, Wiring the Electrical System  
6.7 What NOT to Do  
Never shut off the Oasis™ Heating Module power via an inline  
battery or master switch while the system is running. Never  
disconnect the battery when the Oasis™ Heating Module is running,  
and never disconnect the battery while the inverter is charging. Do  
not wire the Oasis™ Heating Module through a disconnect that is  
used as a normal shut-down of the DC system.  
NOTICE  
Doing either will severely damage the Oasis™ Heating Module  
because it fails to automatically purge the combustion chamber.  
Such damage is detectable upon inspection and will not be covered  
under warranty. Always shut the system off using the normal  
system controls, after it has completed its purge and cooled down  
the combustion chamber.  
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The Oasis™ Heating Module  
 
Section  
7
Plumbing the System  
7.1 Before You Begin  
follow all recommendations for properly installing the plumbing  
system. Any deviations from these must be approved in advance by  
ITR.  
The Oasis™ Heating Module when attached to the Distribution  
Module (optional) must use the following:  
Section 7, Plumbing the System  
Ensure a four (4) quart minimum overflow bottle is attached to  
the filler neck.  
• The return and supply coolant plumbing connections are on the  
top of the Oasis™ Heating Module and are 1/2” male NPT  
fittings. The return coolant input to the Oasis™ Heating Module  
is a connection labeled “Inlet” and the supply coolant output  
from the Oasis™ Heating Module is a connection labeled “Outlet”.  
Ensure proper direction of flow. Refer to Figure 7-1: Heating  
Module for the location of the fittings.  
• Two 1/2” NPT pipe to 3/4” hose barb fittings (not supplied) must  
be fitted into the Oasis™ Heating Module connections and  
tightened to a leak free condition using an appropriate thread  
sealant.  
• Hose and/or tubing used to connect to the Oasis™ Heating  
Module or Distribution Module input and output connections must  
be heavy duty heater hose, minimum 3/4” I.D, or 5/8” PEX.  
All fittings on the Oasis™ Heating Module require two wrenches  
when tightening. One wrench must be placed on the tank fitting  
and held in place to prevent this fitting from being overstressed.  
The other wrench can be used to tighten the matching half of the  
fitting onto it. Failure to follow this procedure will damage the  
Oasis™ Heating Module and the fittings.  
NOTICE  
Do not operate the Oasis™ Heating Module until a proper  
water/anti-freeze solution has been added to the Oasis™ Heating  
Module and the heating system and all trapped air has been bled.  
An inadequate mixture may cause system circulation problems and  
potential Oasis™ Heating Module damage and/or personal injury.  
Use only a non-toxic, propylene glycol based coolant with additives  
recognized as safe “GRAS” by the FDA. Refer to the anti-freeze  
manufacturer recommendations for instructions for your application.  
! DANGER  
7-2  
The Oasis™ Heating Module  
 
Section 7, Plumbing the System  
Figure 7-1 Heating Module  
All fittings, hose and/or tubing involving the domestic water  
component of the Distribution Module, must be approved for use  
with domestic water and rated for the domestic water system  
pressure  
NOTICE  
• All plumbing lines must be run and secured so as to prevent  
damage, chafing and kinking  
• Ensure that the coolant flow is adequate through the Oasis™  
Heating Module and the system. An indication of inadequate  
flow is, when the Oasis™ Heating Module is running and up to  
normal operating temperature, the difference between the inlet  
and outlet coolant temperature to the Oasis™ Heating Module is  
less than 20F.  
• The Distribution Module contains three distribution pumps and  
one heat exchanger and is pre-wired and pre-plumbed for ease  
of installation.  
• The Heating and Distribution Modules should be filled and flushed  
prior to operation to remove any foreign debris.  
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Section 7, Plumbing the System  
• Use heavy-duty heater hose or PEX tubing.  
Slip-on foam  
insulation coverings may be used over the hose fittings to reduce  
heat loss. Secure all hose connections with spring clamps.  
• Air vents for the fluid circulation system are not supplied, but  
may be optionally installed to help bleed air from the system.  
7.3 What NOT to Do  
The Oasis™ Heating Module’s circulating water pump is one of the  
most critical parts of the system. Never let the pump run dry or  
you will damage the impeller. This is not covered under warranty.  
NOTICE  
Don’t use low-quality heater hose.  
Don’t let the hose come into contact with solvents, which may  
cause it to soften and swell. If there is any risk that solvents may  
contact the hose, insert it into PVC plastic tubing for protection.  
7.4 Installation Procedure  
To install and connect the Oasis™ Heating Module and heater hose:  
1 The supply and return coolant connections are on top of the  
Oasis™ Heating Module and are 1/2” male NPT fittings. The  
return coolant input to the Oasis™ Heating Module is labeled  
“Inlet” and the supply coolant output from the Oasis™ Heating  
Module is labeled “Outlet”. Ensure proper direction of flow.  
2 Two male 1/2” NPT x 3/4” hose barbs (not supplied) must be  
fitted into the supply and return fittings and tightened to a leak  
free condition.  
If the Distribution Module is to be used with the Oasis™  
Heating Module, refer to Section 9, Installing the Distribution  
Module.  
7-4  
The Oasis™ Heating Module  
 
Section 7, Plumbing the System  
3 If the Distribution Module is not utilized, connect the cabin  
fan heater supply lines to the supply coolant “Outlet” from the  
Oasis™ Heating Module. Ensure there are no kinks or sharp  
bends that might restrict the fluid flow. See Figure 7-2: Three  
Approved Methods of Installing Heater Hose (Consult ITR for  
Alternative Methods and Products) for methods of attaching the  
heater hose.  
Connect the cabin fan heater return lines to the return coolant  
“Inlet” on the Oasis™ Heating Module. Ensure there are no  
kinks or sharp bends that might restrict the fluid flow.  
4 Fill the Oasis™ Heating Module through the filler neck with the  
recommended propylene glycol/water anti-freeze solution and  
bleed all trapped air.  
Do not operate the Oasis™ Heating Module until the proper  
water/anti-freeze solution has been added to the Oasis™  
Heating Module and the heating system and all trapped air has  
been bled.  
An inadequate mixture may cause system  
circulation problems and potential Oasis™ Heating Module  
damage and/or personal injury.  
Use only a non-toxic, propylene glycol based coolant with  
additives recognized as safe “GRAS” by the FDA. Refer to the  
anti-freeze manufacturer recommendations for instructions for  
your application.  
Figure 7-2: Three Approved Methods of Installing Heater Hose  
(consult ITR for alternative methods and products)  
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Section 7, Plumbing the System  
7-6  
The Oasis™ Heating Module  
 
Section  
8
Operating the Oasis™ Heating  
Module  
This section describes the features, operation and maintenance  
of your new Oasis™ Heating Module. READ THESE  
INSTRUCTIONS AND SAVE FOR REFERENCE.  
8.1 Features of Your Oasis™ Heating  
Module  
The Oasis™ Heating Module uses a diesel burner (12 VDC)  
controlled by a multi-functional electronic controller as the  
primary source of heating coolant fluid (anti-freeze and water).  
Two 1500 Watt, 120 VAC immersion elements are used as  
secondary heat sources. The Oasis™ Heating Module heats the  
coolant fluid to provide a source of heat for all hydronic space  
heating needs. When used with the Distribution Module and its  
integral distribution pumps, the Oasis™ Heating Module has the  
ability to circulate the coolant fluid to all space heating areas. It  
can also provide a supply of domestic hot water using the  
integral heat exchanger in the Distribution Module.  
Other features of the Heating Module include:  
• A high-temperature, stainless steel burner and stainless steel  
jacket.  
• 8.2 US gallon welded insulated stainless steel coolant tank  
that minimizes heat loss and optimizes heat recovery.  
• Low coolant level switch on the tank.  
• Easy to install, completely modular and field serviceable with  
Heating Module hookups and connections easily accessible  
from the front and top of the Oasis™ Heating Module.  
• Quiet operation and low power consumption.  
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Section 8, Operating the Heating Module  
• Low pressure fuel system with built-in fuel pump.  
• Fuel efficient burner capable of burning a wide variety of  
diesel-based fuels.  
• Exhaust has minimal smoke and smell.  
• Fan assisted sealed combustion is designed to use outside  
combustion air.  
• Simple, low amperage draw ignition.  
• Electronically-controlled system with:  
• Automatic safety shutdown.  
• Manual-reset aquastats for safety overheat protection.  
• LED indicators on the Control Panel for diagnostics.  
• Patented, proprietary Flame Sensor.  
• Heating Module Remote Operating Panel with ON/OFF switch  
for the diesel burner, AC elements, and engine heat.  
• Heating Module Control Panel with buttons for Power, Bypass,  
Reset, and indicator LED’s for operational and diagnostic  
information;  
Available with the Optional Distribution Module:  
• Three distribution pumps, one heat exchanger for heating  
multiple zones, engine heat function, and also producing  
domestic hot water (mixing valve included). Also includes  
filling valves for easy filling/purging.  
• Zone Control Board for controlling up to five space heating  
zones.  
8.2 Your Heating Module Model  
As the user, you must be fully aware of the controls and  
operating features particular to your model of The Oasis™  
Heating Module. This is essential for the proper functioning and  
life of your Oasis™ Heating Module as well as protecting your  
warranty.  
NOTICE  
Your model can be identified by locating the serial number label  
on the outside case of the Oasis™ Heating Module. The serial  
8-2  
The Oasis™ Heating Module  
 
Section 8, Operating the Heating Module  
number identifies the model type through the first series of  
letters and numbers.  
The two types of Oasis™ Heating Modules are:  
CH50 – Oasis™ Heating Module 50  
CH35 (“CSA Certification Pending”) – Oasis™ Heating Module 35  
8.3 Operating Instructions for the  
Oasis™ Heating Module  
The Oasis™ Heating Module must be installed and connections  
made in accordance with the recommendations in the Installation  
and Operating Manual prior to operating the module.  
NOTICE  
• The Oasis™ Heating Module, Figure 8-1: Oasis™ Heating  
Module, heats the coolant to a preset temperature and will  
automatically cycle to maintain the temperature.  
Figure 8-1 Oasis™ Heating Module  
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Section 8, Operating the Heating Module  
8.4 Turning the Power to the Oasis™  
Heating Module ON  
• The Oasis™ Heating Module’s main Control Panel, Figure 8-2:  
Heating Module Main Control Panel, located on the front of the  
module contains three push buttons: ON/OFF power, Bypass,  
and Reset. The power switch must be pushed ON (power LED  
will turn ON) to turn the DC electrical power to the main  
control board and module ON and is required to be left ON  
during any period where heat is requested.  
• When the Oasis™ Heating Module is shut down for any  
extended period or the season, it is recommended that the  
power switch be turned OFF.  
Figure 8-2 Heating Module Main Control Panel  
Do not operate the Oasis™ Heating Module or Distribution  
Module (if installed) until a suitable water/anti-freeze solution is  
in the modules and all trapped air has been bled or removed.  
NOTICE  
Use only a non-toxic propylene glycol based coolant with  
additives generally recognized as safe ”GRAS” by the FDA in the  
Oasis™ Heating Module and Distribution Module.  
! DANGER  
8-4  
The Oasis™ Heating Module  
 
Section 8, Operating the Heating Module  
8.5 Activating the Burner (Primary) and  
AC Heat (Secondary) from the  
Remote Operating Panel  
Activating the Burner (Primary Heat Source)  
• The burner switch on the Remote Operating Panel controls the  
ON/OFF of the diesel burner (primary heat source). When the  
burner switch is turned ON, the diesel portion of the Oasis™  
Heating Module will turn ON after ten seconds. The Burner  
LED will turn ON when the diesel burner has been activated.  
The burner will continue to operate until the coolant in the  
Oasis™ Heating Module reaches the set operating  
temperature range. At this point, the diesel burner will turn  
OFF. If the Oasis™ Heating Module coolant should cool down  
below this temperature range, the burner will again  
commence firing and will continue until either the burner  
switch on the remote panel is turned OFF or the temperature  
range is again achieved. If the burner switch on the remote  
panel is turned OFF, the burner stops and the Oasis™ Heating  
Module enters a two minute cool down stage prior to  
completely shutting down.  
Activating the AC Immersion Element(s) (Secondary Heat  
Source)  
• Place the AC power switch on the Remote Operating Panel to  
either the one element or two element position. The AC Heat  
(green) LED will turn ON indicating the AC element(s) are  
energized and the coolant is being electrically heated. They  
will continue to operate until the coolant in the Oasis™  
Heating Module reaches the set operating temperature range.  
At this point, the elements will turn OFF. If the Oasis™  
Heating Module coolant should cool down below this  
temperature range, the AC elements will again be energized  
and will continue until either the AC switch on the remote  
panel is placed in the OFF position or the temperature range  
is again achieved. If the AC element switch on the remote  
panel is turned OFF, the AC elements are de-energized and  
the AC Heat (green) LED turns OFF.  
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Section 8, Operating the Heating Module  
Activating the Burner and AC immersion Element(s)  
Jointly  
• Turn the burner switch ON and place the AC power switch on  
the Remote Operating Panel to either the one element or two  
element position. The Burner and AC Heat (green) LED’s will  
turn ON indicating the diesel burner and AC element(s) have  
been selected.  
8.6 Activating the Cabin Fan Heaters  
through the Thermostats  
(Distribution Module Equipped Systems Only) (Burner or  
AC Heat or Engine Heat Source Available)  
• Any thermostat connected to the Distribution Module’s Zone  
Control Board and calling for heat will cause the cabin fan  
controlled by that thermostat to be enabled. The ITR cabin  
fan has a built-in aquastat that prevents the cabin fan from  
blowing cold air. Once the room temperature has reached the  
temperature called for by the thermostat the cabin fan will  
turn off.  
8.7 Activating the Domestic Hot Water  
(Oasis™ Heating Module and Distribution Module used in  
Tandem) (Burner or AC Heat On)  
• As long as heat is available in the Oasis™ Heating Module, the  
Distribution Module (Optional) will respond to a call for  
domestic hot water. Ensure that a heat source has been  
selected (i.e. Burner, AC, Engine). The production of the  
domestic hot water is continuous on the Burner operation  
and limited when using AC or Engine.  
The domestic water pump is not a part of, nor controlled by the  
Distribution Module or The Oasis™ Heating Module.  
NOTICE  
8.8 Activating Engine Heat & Pre-heat  
(Oasis™ Heating Module and Distribution Module used in  
Tandem) (Burner or AC Heat On)  
Pre-heating the Engine  
8-6  
The Oasis™ Heating Module  
 
Section 8, Operating the Heating Module  
• Turn the engine preheat switch on the Remote Operating  
Panel to the ON position with the burner or AC switch on. The  
engine preheat pump and coolant pump will be activated once  
the Oasis™ Heating Module is in its set operating temperature  
range. The engine will start to be preheated by the Oasis™  
Heating Module.  
• Note: An engine preheat pump does not come supplied with  
the Distribution Module. The power and ground for the pump  
is available from the Distribution Module.  
Engine Heat Used for Domestic Water or Space Heating  
• Start the vehicle engine and let it come up to the normal  
operating temperature.  
Turn the burner switch on the  
Remote Operating Panel to the ON position. The Oasis™  
Heating Module will come up to the set operating temperature  
range and will cycle OFF. The heat from the vehicle engine  
will be transferred from the engine to the domestic water and  
space heating loop.  
8.9 Functions of the Remote Operating  
Panel  
• The Oasis Heating Module’s Remote Operating Panel,  
Figure 8-3: Remote Operating Panel, contains one ON/OFF  
burner switch, one triple position AC element switch, one  
ON/OFF engine heat switch to control the optional engine pre-  
heat pumps, and four LED’s indicating Burner activation, AC  
element activation (CH50 used in tandem with Distribution  
Module), module fault, and zone fault.  
Figure 8-3 Remote Operating Panel  
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8-7  
 
Section 8, Operating the Heating Module  
Burner Switch (Primary Heat Source)  
• The burner switch on the remote panel controls the ON/OFF of  
the diesel burner. The Burner LED will turn on when the  
diesel burner has been activated.  
AC Element Switch (Secondary Heat Source) (CH50 and  
DM8 used in Tandem)  
• The triple position AC element switch controls the activation  
of a single 120 VAC immersion element only, dual 120 VAC  
immersion elements jointly, or both elements off. The AC  
heat LED will turn ON to indicate when the element(s) have  
been activated.  
Engine Pre-Heat Switch (CH Models with this Option Only)  
Preheating the Engine  
• The engine pre-heat switch (optional) controls the ON/OFF of  
the engine pre-heat pump (not included). However, the  
engine pre-heat pump (not included) will not function unless  
the coolant in the Oasis™ Heating Module has achieved a  
preset temperature.  
Burner LED (Green)  
• When ON, indicates the diesel burner has been activated.  
AC Heat LED (Green)  
• When ON, indicates the 120 VAC immersion elements(s) are  
activated.  
Module Fault LED (Red)  
• When ON, indicates the Oasis™ Heating Module has faulted.  
The specific fault can be identified by examining the Oasis™  
Heating Module Control Panel located on the front of the  
Oasis™ Heating Module. There are indicator LED’s on the  
panel that are used for diagnostics. Refer to the description  
of the Oasis™ Heating Module Control Panel for further  
details.  
Zone Fault LED (Red) (Functional with Distribution Module  
Equipped Models Only )  
8-8  
The Oasis™ Heating Module  
 
Section 8, Operating the Heating Module  
• When ON, indicates the space heating zone(s) has faulted.  
The specific fault can be identified by examining the  
Distribution Module Zone Control Panel (optional) located  
beside the Oasis™ Heating Module. There are indicator LED’s  
on the panel that indicate the problem.  
Refer to the  
description of the Distribution Module Zone Control Panel for  
further details.  
8.10 Functions of the Heating Module  
Control Panel  
• The Oasis™ Heating Module’s Control Panel, Figure 8-2:  
Heating Module Main Control Panel, contains three push  
buttons: ON/OFF power, Bypass, and Reset. In addition, it  
contains nine LED’s indicating Power, AC Heat, Compressor,  
Fuel Pump, Combustion Fan, Igniter, Flame Out, Voltage and  
Low Water.  
Power Button  
• The power button turns ON/OFF the power to the control  
board. The Power LED (green) turns ON when the power to  
the control board is ON.  
Bypass Button  
• The bypass button is for authorized service personnel  
only.  
Reset Button  
• The reset button when pressed resets the control board.  
Power LED (Green)  
• The power LED (green) turns ON when the power to the  
control board is ON. The LED flashes when the Oasis™  
Heating Module is in Bypass mode.  
AC Heat LED (Green)  
• The AC Heat LED (Green) turns ON when a single or dual AC  
immersion element(s) have been activated.  
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Section 8, Operating the Heating Module  
Compressor, Fuel Pump, Combustion Fan, Igniter (Green)  
• The compressor, fuel pump, combustion fan, and igniter LED’s  
(Green) turn ON when the component is ON, and will flash if  
the component is electrically open or shorted.  
Flame Out (Red)  
• The Flame Out LED (Red) turns ON when a flame fault has  
been detected.  
Voltage Fault (Red)  
• The voltage fault LED (Red) turns ON when a voltage fault  
has been detected.  
Low Water (Red)  
• The Low Water LED (red) turns ON when a low coolant level  
in the Oasis™ Heating Module has been detected.  
8.11 Functions of the Distribution Module  
(Optional) Zone Control Panel  
• The Distribution Module Zone Control Panel, Figure 8-4: Zone  
Control Panel, contains seven green LED’s for Power, Zone 1,  
2, 3, 4 and 5 Thermostat(s), and Domestic Water.  
•
It also contains nine matched pairings of red/green LED’s for  
Zone 1, 2, 3, 4 and 5 Fan(s), Summer Loop, Heat Loop 1,  
Heat Loop 2, and Engine Pre-heat Pump.  
8-10  
The Oasis™ Heating Module  
 
Section 8, Operating the Heating Module  
Figure 8-4: Zone Control Panel  
Power LED (Green)  
• The power LED turns ON when the power to the Distribution  
Module Zone Control Board is ON.  
Section 8, Operating the Heating Module  
8.12 Maintenance  
Customer Monthly Maintenance: Check the following and  
correct as required:  
• Coolant hoses and fittings for leaks and integrity.  
• Check coolant level in the overflow bottle (3/4 full when  
hot). Fill only when the system is COLD and in small  
quantities only to prevent overfilling.  
• Exhaust fittings, connections, tubes for leaks, and  
integrity.  
• Exhaust and air-intake checked for no obstructions.  
• Fuel lines, fittings for leaks and integrity.  
• External fuel filter for clogging.  
Annual Service Requirements: Perform the following:  
• Prior to operation for the season, a factory service  
tune-up of the modular system should be performed  
by trained service personnel. Only personnel familiar  
with the equipment modules should perform the service  
tune-up. It is recommended that the dealer be contacted  
for this service or if not available, contact ITR for  
information on service resources.  
• As a general guide, the regular maintenance items such as  
the igniter, fuel filters (internal and external), and air filter  
(internal) should be replaced as opposed to inspected and  
cleaned. Their performance may be deteriorating and/or  
their remaining service life ending without any apparent  
visual signs or operating symptoms.  
• The major components such as the air compressor, fuel  
pump, fuel nozzle, and combustion air fan should be  
examined for wear and should be replaced by the service  
technician as required.  
• The combustion tube should be inspected by the service  
technician for wear and replaced if necessary. To access  
the combustion tube, the front panel of the Oasis™ must  
be removed along with the burner box cover. The fuel  
block must then be removed from its mounting position.  
8-12  
The Oasis™ Heating Module  
 
Section 8, Operating the Heating Module  
Finally, the burner and counter-flow tube must be taken  
out by removing the nuts holding the burner box in  
position. If the tube is satisfactory, a thorough cleaning of  
the tube and burner chamber should be performed by  
blowing out and vacuuming any ash and carbon buildup.  
Any build up on the surface of the burner chamber will  
cause the heater to lose efficiency.  
• Regular inspection and maintenance is the only way to  
ensure safe, reliable and efficient operation of your heating  
system.  
8.13 Protecting the Heating Module and  
the Optional Distribution Module  
Protect the Oasis™ Heating Module and Distribution Module  
(Optional) from temperature extremes and any dusty, dirty,  
corrosive environment.  
NOTICE  
Protect the module(s) and the system from cold temperatures  
and corrosion by using a proper mixture of anti-freeze and water.  
Use only a non-toxic propylene glycol based coolant with  
additives generally recognized as safe “GRAS” by the FDA in the  
Oasis™ Heating Module and Distribution Module (Optional). Read  
and follow the anti-freeze manufacturer’s instructions for the  
type of anti-freeze and mixture recommended for your  
application.  
! DANGER  
Note that any domestic water in the Distribution Module  
(Optional) will freeze in cold temperatures and will damage the  
internal parts. The Distribution Module and all associated  
components must be completely drained and emptied of any  
domestic water before freezing temperatures are encountered.  
NOTICE  
8.14 General Troubleshooting  
Ensure that your heating module has both sufficient  
battery voltage and ground, and coolant level as the  
module is designed not to allow operation if either are  
incorrect (indicated by lit Voltage LED or Low Water LED  
on the Oasis™ Heating Module Control Panel) .  
Burner Does Not Start Up  
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Section 8, Operating the Heating Module  
• Oasis™ Heating Module connected to 12 VDC power?  
• Power button on Oasis™ Heating Module Control Panel  
pushed ON? Power LED lit on Oasis™ Heating Module  
Control Panel?  
• Burner switch on Remote Operating Panel ON? Burner  
LED lit on Remote Operating Panel?  
• Main fuse or circuit breaker blown or tripped?  
AC immersion elements do not activate  
• Module connected to 120 VAC power?  
• AC switch on Remote Operating Panel placed in the one or  
two element position?  
Operating Panel?  
AC Heat LED lit on Remote  
• AC immersion elements circuit breakers tripped?  
Burner Starts but Flame Faults  
• Fuel supply present and adequate?  
• Air-intake or exhaust not blocked or obstructed?  
• Air in fuel line (white smoke from exhaust or popping  
sound from exhaust)?  
• Fuel filter (external) dirty?  
• Restrict the fuel return line with needle valve or pinch off  
completely.  
Burner Starts but Zone Faults  
• Power LED on Distribution Module Zone Control Panel  
glowing green?  
• Component matched LED pairings all glowing green on the  
Distribution Module Zone Control Panel?  
8-14  
The Oasis™ Heating Module  
 
Section  
9
Installing the Distribution  
Module, DM12  
Thank you for purchasing the Distribution Module, DM12.  
This section describes its installation.  
9.1 Installing your Distribution Module  
Equipment, Tools and Skills  
As the Installer, you must be qualified and authorized to do the  
installation which requires mechanical and electrical knowledge.  
NOTICE  
The module is to be installed in accordance with the  
standards  
and  
regulations  
of  
authorities  
having  
jurisdiction. Proper workmanship is essential to the proper  
function and life of your module as well as protecting your  
warranty.  
9.2 Selecting the Module Location  
The installation should consider the following:  
•
Mounting location must be able to support double the gross  
weight of the Distribution Module (i.e. 33 lbs. x 2 = 66  
lbs./13 KG x 2 = 26 KG) and must be of a non-combustible  
and non absorptive surface.  
•
•
The module must be mounted in an area that provides  
unrestricted access to the front panel (minimum of 6” top  
clearance) with 3” clearance to all other module surfaces.  
Module is 11”H x 14”W x 6.5” D. (27.9cm x 35.5cm x  
15.2cm). See Figure 9-1: Distribution Module, DM12.  
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9-1  
 
Section 9, Installing the Distribution Module  
• Module must be mounted using four, 1/4” through bolts using  
1” diameter fender washers, lock washers and nuts. The  
module must be mounted in the position as shown against a  
wall or on the floor.  
Figure 9-1: Distribution Module, DM12  
9.3 Selecting the Distribution Module  
Zone Box Location  
•
Mount the Distribution Module Zone Box (containing the  
Zone Control Board) vertically, close to the Distribution  
Module. Allow sufficient room to access the internal fuses as  
well as to view the display LED’s on the board itself.  
•
Mount the bracket against a wall using 2 flat head screws.  
The distribution module zone box will then click onto the  
bracket.  
Figure 9-2: Distribution Module Zone Box  
9-2  
The Oasis™ Heating Module  
 
Section 9, Installing the Distribution Module  
•
The Distribution Module is connected to the Distribution  
Module Zone Control Board through the electrical connections  
located at the bottom of the Zone Control Board box. The  
distance apart is dictated by the length of the 9 pin connector  
cord used.  
9.4 Plumbing Installation  
The plumbing installation should consider the following:  
•
The Distribution Module, see Figure 9-3:  
Module Fittings Location. See the illustration for the location  
Distribution  
of the fittings.  
Figure 9-3: Distribution Module Fittings Location.  
All fittings on the Oasis™ Distribution Module require two  
wrenches when tightening. One wrench must be placed on the  
module fitting and held in place to prevent this fitting from being  
overstressed. The other wrench can be used to tighten the  
NOTICE  
matching half of the fitting onto it.  
Failure to follow this  
procedure will damage the Oasis™ Distribution Module, and the  
fittings.  
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9-3  
 
Section 9, Installing the Distribution Module  
•
The Domestic water connections are located on top of the  
module. The Cold water supply can be connected using a ½”  
NPT fitting. The maximum water supply pressure to the  
module is 150 PSI (10 bar). The Hot water Outlet  
temperature is regulated by an internal mixing valve factory  
set at 120F (49°C). If needed this valve can be adjusted in a  
range from 100F (38°C) to a maximum of 145F (63°C). For  
more details about adjusting the temperature see chapter  
9.9. A domestic water drain is provided for winterizing  
purposes. This will prevent damage to the internal heat  
exchanger due to freezing water. See Figure 9-4: Domestic  
Hot water system plumbing.  
All fittings, hose, tube and fitting sealant involving the domestic  
water must be food safe and approved for use with domestic  
water and rated for the domestic water system pressure.  
WARNING  
Figure 9-4 Domestic Hot Water System Plumbing.  
•
The engine heat/pre-heat connections are located on the  
side of the distribution module. Hot coolant from the engine  
enters the module at the “engine heat inlet”. The “engine heat  
outlet” returns the coolant back to the engine supply. When  
the pre-heat function is installed an additional pump is  
connected between the “engine heat outlet” and the engine  
9-4  
The Oasis™ Heating Module  
 
Section 9, Installing the Distribution Module  
supply. The module contains a red and black wire to connect  
this pump. The pre-heat switch on the remote control panel  
will activate this pump. See Figure 9-5: Engine heat/pre-heat  
system plumbing.  
Figure 9-5 Engine Heat / Pre-heat System Plumbing.  
•
•
The pre-heat pump wires are capped off to prevent  
accidental shorting. The pre-heat switch on the remote will  
turn on power to the wires.  
The Distribution module contains two connections on the  
side panel to connect to the Oasis™ Heating Module. The  
“Inlet from Heater” is connected to the hot coolant supply  
outlet on the Oasis™ Heating Module. The “Outlet to Heater”  
is connected to the cold coolant return inlet on the Oasis™  
Heating Module. It is recommended to use minimal ¾” ID  
hose for this connection. See Figure 9-6: Connecting to the  
OASIS heating module.  
International Thermal Research  
9-5  
 
Section 9, Installing the Distribution Module  
Figure 9-6: Connecting to the OASIS Heating Module  
•
The Distribution module has the capability to supply heat  
for two separate heating loops labeled “Heating loop 1 supply”  
and “Heating loop 2 supply”. Each loop can contain several  
fans connected in series. The control board can regulate up to  
5 zones. Zones 1 and 2 control the fans in heating loop 1 and  
Zones 3, 4 and 5 control fans in heating loop 2. See Figure 9-  
7: Connecting two heating loops.  
9-6  
The Oasis™ Heating Module  
 
Section 9, Installing the Distribution Module  
Figure 9-7: Connecting two Heating loops.  
Use only a non-toxic propylene glycol based coolant with  
additives generally recognized as safe ”GRAS” by the FDA in the  
coolant side of the Distribution Module. Refer to the anti-freeze  
manufacturer recommendations for instructions for your  
particular application.  
! DANGER  
Do not operate the Oasis™ Heating Module and Distribution  
Module, DM12 (Optional) until coolant is in the Oasis™ Heating  
Module and Distribution Module and all trapped air has been  
bled.  
NOTICE  
All plumbing lines must be run and secured so as to prevent  
damage, chafing and kinking.  
9.5 Filling/Purging the heating system  
The Distribution module contains two valves with ½”NPT  
connections to be used for filling the heating loop. To initially fill  
up and bleed the air out of the system, do the following:  
1. Connect a hose to the outlet of a diaphragm pump and to the  
“fill inlet valve” on the distribution module. Attach a hose to the  
International Thermal Research  
9-7  
 
Section 9, Installing the Distribution Module  
inlet of a diaphragm pump and place the hose in a container  
filled with a 50/50 mixture of propylene glycol and water (see  
Figure 9-8).  
2. Connect a hose to the “fill outlet valve” on the distribution  
module and place the other end of the hose in the same  
container.  
Figure 9-8: Initial fill up Oasis system  
3. Open both valves on the Distribution module.  
4. Turn ON the diaphragm pump. This will prime the pumps in  
the Oasis Distribution Module. It may be necessary to fill up the  
container with more coolant as the air is being bleed from the  
system.  
5. Turn on the pump activation switch, located on top of the zone  
box, this will activate the pumps inside the distribution module  
and fill up both heating loops.  
9-8  
The Oasis™ Heating Module  
 
Section 9, Installing the Distribution Module  
6. Once the coolant in the container remains at the same level  
and there appears to be no air in the return stream from the fill  
outlet hose, close the valves on the distribution module and stop  
the diaphragm pump.  
7. Turn off the pump activation switch.  
8. The Oasis heating system is ready to be operated.  
9.6 Electrical Connection  
All electrical connections and wiring must comply with normally-  
accepted 12 VDC wiring practices, local regulations and  
ABYC/RVIA standards. Only a qualified electrical installer should  
complete the wiring. All field wiring is to be in accordance with  
CSA Standard C22.1, Canadian Electrical Code Part l or the  
National Electrical Code, ANSI/NFPA 70.  
WARNING  
12 VDC  
•
Primary DC power to the module should originate after the  
master disconnect switch from a dedicated connection on the  
house battery bank.  
•
The power connection to the module from the power supply  
is through the Distribution Module Zone Control Board itself.  
A 25 amp fuse or breaker must be included inline from the  
power source to the positive connection on the zone board.  
The primary power wire gauge must be sized to permit no  
more than a 3% voltage drop from the power supply to the  
zone board. There are no direct 12 VDC power connections  
onto the Distribution Module itself. Refer to Figure 9-9:  
Distribution Module Wiring.  
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9-9  
 
Section 9, Installing the Distribution Module  
9.7 Distribution Module Zone Control  
Board  
Multi-Pin Connectors  
The Zone Control Board has four multi-pin connectors, see Figure  
9-3: Plumbing for Five Zones Using the Distribution Module, that  
are to be connected through connector cords (supplied) to the  
matching multi-pin connectors as follows:  
•
•
•
•
10 pin connector to Heating Module Remote Operating  
Panel.  
8 pin connector to Heating Module (connector cord  
transitions to a 9 pin connector for the Heating Module).  
12 pin connector to Distribution Module (connector cord  
transitions to a 9 pin connector for the Distribution Module).  
14 pin connector to thermostat and cabin fan connector  
plug.  
Cabin Fan leads  
•
•
•
The positive (red) lead from each cabin fan is to be  
attached to one of the trailing cabin fan leads, color coded for  
zones, from the thermostat and cabin fan connector plug.  
The negative lead from each cabin fan is to be attached to a  
ground terminal (not provided) that is connected to a battery  
ground.  
The cabin fan 1 leads (orange) can supply up to a maximum  
of 10 Amps. The other cabin fan leads 2-5 can supply up to a  
maximum of 5 Amps each. The total current draw is not to  
exceed 18 Amps for all cabin fan leads.  
•
If the system requires higher amperage draws, install a  
separate relay to power the fans. This relay will use the  
existing fan circuit as a signal and must be wired to a  
secondary power source (not the heater’s control board). See  
Figure 5-3.  
9-10  
The Oasis™ Heating Module  
 
Section 9, Installing the Distribution Module  
Thermostat Leads  
•
•
The power lead to the thermostat is to be attached to a  
power terminal (not provided) that is connected to the  
battery.  
The return lead from each thermostat is to be attached to  
one of the trailing thermostat leads, color coded for zones,  
from the thermostat and cabin fan connector plug.  
Figure 9-9: Distribution Module Wiring  
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9-11  
 
Section 9, Installing the Distribution Module  
If the zone board is being used without the distribution module,  
use the following wiring diagram:  
Figure 9-10: Zone Board Wiring (No DM12)  
9-12  
The Oasis™ Heating Module  
 
Section 9, Installing the Distribution Module  
9.8 Inspection and Testing  
After all components have been properly installed according to  
ABYC Industry Standards and Practices and the  
recommendations of this Manual, the Distribution Module and  
Oasis™ Heating Module should be inspected using the  
Inspection Check Sheet in this Manual. The Inspection  
Check Sheet is divided into relevant sections allowing each  
phase of the Inspection to be carried out systematically, and  
then signed off by authorized personnel.  
9.9 Hot water tem perature adjustm ent  
The distribution module has the option to adjust the temperature  
of the domestic hot water outlet. Standard this temperature is  
set at 120F (49°C). In order to adjust the temperature, the front  
cover has to be removed. The front cover can be removed by  
removing the 6 Philips head screws. The mixing valve adjustment  
knob is shown in the figure below.  
Figure 9-11: Mixing valve location  
The parts inside the module are HOT when in operation. Use  
gloves when adjusting the mixing valve.  
W ARNING  
Turning the knob left (clockwise from top view) will increase the  
hot water outlet temperature up to a maximum of 145F (63°C).  
Turning the knob right (counter-clockwise) will decrease the hot  
water outlet temperature down to minimal 100F (38°C). Mount  
the cover back in place after the adjustment.  
International Thermal Research  
9-13  
 
Section 9, Installing the Distribution Module  
9-14  
The Oasis™ Heating Module  
 
Warranty Information  
Attention Purchaser and Installer  
NOTICE  
No warranty covers damage or failure of the heater, hot water heater, heating  
module, distribution module, or space heating module (collectively, “the Product”)  
or to the vehicle in which it is installed, due to unapproved, unauthorized, or  
improper installations of the Product. Use of any unapproved materials or  
equipment in the Product’s installation or operation will result in a voided  
warranty for the entire heating system.  
•
•
•
•
You must install the Product in compliance with the specifications, standards, and  
instructions in the Installation Manual.  
If you need to depart from the manual, you must first consult and obtain the written  
approval of ITR. Otherwise, your warranty may be voided or limited.  
Systems that are not installed to the published installation instructions (unless with  
prior written approval of ITR) will be ineligible for warranty coverage.  
Fill in the enclosed Warranty Card completely. It must be signed by the Owner and  
returned to ITR within 30 days of the date of the original installation. The Owner  
cannot transfer this warranty. Before mailing, make photocopies of the completed  
Warranty Card for your records. It will be a valuable reference if you need warranty  
repairs in the future.  
General Warranty  
ITR warrants all water jackets or coolant jackets in the Products to be free of defects in  
materials and workmanship under design usage and service conditions for three (3) years  
from the date of the sale to the original retail owner or three thousand (3000) hours of  
operation of the Product, whichever comes first.  
ITR warrants the water tank in the Hot Water Heater to be free of defects in materials and  
workmanship under design usage and service conditions for two (2) years from the date of  
the sale to the original retail owner or two thousand (2000) hours of operation of the  
Product, whichever comes first. All other accessories and components supplied or installed  
in the heater will be covered by the lesser of the accessory and component manufacturer’s  
warranty or a period of two (2) years or two thousand (2000) hours from the date of the  
sale to the original retail owner of the Product. Warranty replacement parts are covered for  
the remainder of the Product’s warranty or ninety (90) days, whichever is greater. At ITR’s  
discretion, coverage for warrantable parts may be made to the Owner in the form of  
repair, replacement, or credit.  
June 2005  
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Warranty Information  
International Thermal Research  
Limited Warranty  
The following warranties are in lieu of all other warranties and conditions. ITR makes no  
other warranties, representations, or conditions, express or implied. Expressly excluded  
are all implied or statutory warranties or conditions of merchantability of fitness for a  
particular purpose, and those arising by statute or otherwise in law or from dealing or  
trade usage.  
The stated express warranties are in lieu of all liabilities or obligations for damages arising  
out of or in connection with the delivery, use, performance, or licensing of the Product or  
in connection with any services performed. In no event whatsoever will ITR be liable for  
indirect, consequential, exemplary, incidental, special, or similar damages, including but  
not limited to, lost profits, lost business revenue, failure to realize expected savings, other  
commercial or economic loss of any kind or any claim against ITR by any other party  
arising out of or in connection with the sale, delivery, use, performance, or repair of the  
Product, or in connection with any services performed, even if ITR has been advised of the  
possibility of such damages, whether based upon warranty, contract, or negligence. ITR’s  
maximum liability shall not in any case exceed the contract price for the Products claimed  
to be defective.  
No one is authorized to increase, alter, or enlarge ITR’s responsibilities or obligations  
under these warranties.  
Owner’s Responsibilities  
If any warrantable failures occur before the expiration of the warranty, the Owner must  
give notice of such failures to ITR or to the authorized ITR dealer from which the Product  
was originally purchased, and obtain written approval for the warranty repair.  
The Owner is responsible for the following costs in case of a warrantable failure:  
•
•
shipping and insurance costs to deliver the defective Product to the dealer or ITR  
(if necessary)  
all repairs made to equipment ancillary to the Product, including the vehicle, coach  
engine, and other associated components of the vehicle in which the Product is  
installed  
•
•
lodging, meals, and other incidental expenses incurred by the Owner as a result of a  
warrantable failure  
“down time” expenses and all business costs and losses rel s4u6l2tinTgw371.09.2042102 021x4p.e8n5s7e1s6aTnm.0e2hi416en5443  
International Thermal Research  
Warranty Information  
•
Original serial number on Product or electrical control board has been removed,  
altered, or is unreadable.  
•
•
Product has been modified or uses non-standard parts not approved by ITR.  
Product has been abused (such as by dropping it), damaged, vandalized, or has  
received improper maintenance.  
•
•
Product has been run dry or operated without appropriate antifreeze, causing damage  
to the heat exchanger, pump seals, etc.  
Product has been exposed to an environment detrimental to its effective operation,  
such as excessively wet, dirty, or hot areas.  
Also not covered under warranty:  
•
•
Parts or Products no longer within the manufacturer’s warranty period.  
Parts or Products installed or used in a manner contrary to ITR’s printed instructions  
without ITR’s prior written permission.  
•
•
Normal wear and tear of parts, including but not limited to, fuel filter, air filter, nozzles,  
fuses, ignitor, electrical motors, fuel pumps, air compressors, and carbon brushes.  
Product malfunctions due to improper installation of parts or Products, including but  
not limited to malfunctions causing inadequacies in air, fuel, or coolant flow; voltage  
problems due to improper wiring; and shock or vibration.  
•
•
Progressive damage to the engine or vehicle caused by failure of the Product or an  
improper installation.  
Diagnosis or repairs to fix problems not directly related to the Product or due to empty  
fuel tanks or poor fuel quality, fuel additives, acidic water, electrolysis, or any chemical  
reactions.  
•
•
Travel time and expenses by an ITR dealer.  
Removal and re-installation expenses for the ITR heater.  
Customer Service Calls  
ITR warrants the ITR heater and the Dealer warrants the installation.  
If you have a service problem, first check the Troubleshooting section of the Owner’s  
Manual to determine if your problem is addressed. Also ensure you are familiar with the  
design and installation setup.  
When calling ITR or the Dealer with a service problem, have the following information  
ready at hand:  
•
•
•
model number and serial number of the Product  
a detailed description of the problem  
your Installation Manual and Owner’s Manual  
June 2005  
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Warranty Information  
International Thermal Research  
Depending on your location, an authorized service person may be able to visit your coach  
or yacht to help troubleshoot problems and repair your Product. Such service calls are at  
the Owner’s expense. Regardless, you must obtain written approval from ITR or the Dealer  
for any warranty repair before it is undertaken. All repairs done under warranty are  
subject to the terms and conditions of the flat-rate manual.  
Returns  
If a service call by an authorized service person is not feasible, the Owner must do the  
following to obtain warranty service:  
1.  
Immediately contact ITR (or your Dealer) and provide a full description of the  
problem.  
2.  
Obtain (in writing) a Return or Repair Material Authorization (RMA) number from ITR  
for any warranty, return, repair, or service. ITR will refuse any return package and  
will not authorize service or repairs without a RMA number. (For repairs by  
authorized Dealers, the dealer must obtain an authorized RMA number from ITR  
before warranty work commences.)  
3.  
4.  
When shipping your Product, pack securely, show the RMA and serial number of the  
Product on the outside of the shipping container, and ship prepaid and insured.  
Provide written details of the problems, date of installation, proof of purchase, and a  
return address.  
After repair or replacement of the Products still under warranty, ITR will pay return  
shipping charges. Factory repairs or replacement will be done as quickly as possible, with  
an estimated turnaround of five working days. All repairs done under warranty are subject  
to the terms and conditions of the flat-rate manual.  
Telephone / Email Service  
There is no charge for help or service information given over the telephone or by fax or  
email. However, any informal advice or recommendation from ITR employees or Dealers is  
given only in good faith as an accommodation to the customer. Such information should  
not be relied upon without an independent verification of its applicability to the customer’s  
particular situation. For customer service or other information, contact:  
IN CANADA:  
IN THE UNITED STATES:  
2431 Simpson Road  
Suite D3, 4018 NE 112th Ave.  
Richmond, BC, Canada V6X 2R2  
Tel: 1-800-755-1272 or 604-278-1272  
Vancouver WA USA  
Tel: 1-800-993-4402 or 360-993-4877  
Fax: 360-993-1105  
Email: [email protected]  
98682  
Fax:  
604-278-1274  
Email: [email protected]  
Website: http://www.itrheat.com  
Page 4  
June 2005  
 

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