International Thermal Research Oasis User manual

Owner’s Manual
Diesel and Electric Heating System
for Recreational Vehicles

- 2 - The OASIS Owner’s Manual
International Thermal Research
INCANADA: INTHEUNITEDSTATES:
2431 Simpson Road Suite B, 11915 56th Circle
Richmond, BC, Canada V6X 2R2 Vancouver, WA, USA 98682
Tel: [phone] Tel: [phone]
or 604-278-1272 or 360-993-4877
Fax: [phone] Fax: [phone]
Email: [email protected]
Website: www.itrheat.com
All rights reserved. No part of this manual may be reproduced or
transmitted in any form by any means, electronic or mechanical, including
photocopying and recording, information storage, retrieval, or transmission,
without permission in writing from International Thermal Research
Right to Modify:
Due to our commitment for quality and ongoing product
improvement, ITR reserves the right to modify or change
without notice, any materials, applications, equipment,
accessories, and/or prices. All measurements and weights are
approximate.
Copyright © 2011 International Thermal
OASIS® is a registered trademark of International Thermal Research Ltd.

IMPORTANT
Warranty Registration Card
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Owner’s Name_________________________________________________________
Address_______________________________________________________________
City___________________ State/Prov._____________ Zip/Postal code___________
Telephone__________________________ Email______________________________
Motorhome Model______________________________________________________
Date of Motorhome Purchase_____________________________________________
Dealer’s Name_______________________________City_______________________
OASIS Serial Number____________________________________________________
Owner’s Signature_________________________________ Date________________
NOTE: This warranty card must be filled in completely, signed and returned to ITR
within 30 days of the motorhome purchase. This warranty is not transferable by the
owner. Make a copy of this page after completion and keep it for your records.
------------------------------------------------ Fold Here --------------------------------------------------
Place
Stamp
Here
_________________________________
_________________________________
_________________________________
International Thermal Research Ltd.
2431 Simpson Road, Richmond BC
Canada V6X 2R2
Toll Free: 1-800-755-1272

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Table of Contents
•Features of your OASIS Heating System ............................... 7
•Operating Instructions for the OASIS Heating Module ............. 9
•Turning the Power to the OASIS Heating Module ON .............. 9
•Activating the Burner (Primary) and AC Heat (Secondary)
from the Remote Operating Panel.................................... 9
•Activating the Cabin Fan Heaters through the Thermostats .... 10
•Activating the Domestic Hot Water..................................... 10
•Activating the Engine Heat & Preheat Function..................... 11
•Functions of the Remote Operating Panel ............................ 11
•Functions of the Heating Module Control Panel..................... 12
•Functions of the Distribution Module Zone Control Panel........ 13
•Maintenance ................................................................... 14
•Protecting the Heating Module and Distribution Module ......... 15
•General Troubleshooting................................................... 15
•Customer Service Contact................................................. 16
•Warranty Information....................................................... 17

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Operating the Oasis®
This manual describes the features, operation and maintenance of your new OASIS
Heating System. READ THIS MANUAL AND SAVE IT FOR REFERENCE.
Features of Your OASIS Heating System
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 stainless steel coolant tank that is insulated to 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.
•Low pressure fuel system with built-in fuel pump.
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•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;
The OASIS™ 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.
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 number identifies the model type through the
first series of letters and numbers.
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Operating Instructions for the OASIS™ Heating System
The OASIS™ Heating Module heats the coolant to a preset temperature and will
automatically cycle to maintain the temperature. The heated coolant is then circulated
by the Distribution Module.
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.
Do not operate the OASIS Heating System until a suitable water/anti-freeze
solution is in the modules and all trapped air has been bled or removed. Do
not operate the OASIS inside an enclosed building
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
The OASIS exhaust is hot; do not park in areas such as tall dry grassy
fields, as a fire may result.
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
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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 the 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.
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 the 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.
Activating the Fan Heaters through the Thermostats
(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.
Activating the Domestic Hot Water
As long as heat is available in the OASIS Heating Module, the Distribution Module 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
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Activating Engine Heat & Pre-heat (If Option is installed)
Pre-heating the Engine
•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.
Functions of the Remote Operating Panel
•The OASIS Heating Module’s 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 module fault, and zone fault.
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)
•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.
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- 12 - The OASIS Owner’s Manual
Engine Pre-Heat Switch (If this Option is installed 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)
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.
Functions of the Heating Module Control Panel
•The OASIS Heating Module’s 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.
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.
Functions of the Distribution Module Zone Control Panel
•The Distribution Module 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.
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Power LED (Green)
•The power LED turns ON when the power to the Zone Control Board is ON.
Zone 1, 2, 3, 4, 5 Thermostat LED’s (Green)
•The Zone # LED turns ON when the thermostat in the zone is calling for heat.
Domestic Water LED (Green)
•The domestic water LED turns ON when there is a call for domestic water heat.
Zone 1, 2, 3, 4, 5 Fans, Summer Loop, Heat Loop 1, Heat Loop 2, Engine Pre-
heat Pump Paired LED’s (Red/Green)
•The nine paired LED’s indicates the functionality of the devices. The green LED will
turn ON when the device is operating normally. The red LED turns ON if a fuse has
been blown.
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. 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.
Protecting the OASIS Heating System
Protect the OASIS Heating Module and Distribution Module 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 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
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
•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?
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AC immersion elements do not activate
•Module connected to 120 VAC power? Circuit breakers tripped?
•AC switch on Remote Operating Panel placed in the one or two element position?
AC Heat LED lit on Remote Operating Panel?
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 Zone Control Panel?
Customer Telephone / Email Service
If you have a service problem, first check the Troubleshooting section of this 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 Authorized Service Dealer with a
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/or Owner’s Manual
You must obtain written approval from ITR or the Service 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. 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 its 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 further information contact:
INCANADA: INTHEUNITEDSTATES:
2431 Simpson Road Suite B, 11915 56th Circle
Richmond, BC, Canada V6X 2R2 Vancouver WA USA 98682
Tel: [phone] or 604-278-1272 Tel: [phone] or 360-993-4877
Fax: [phone] Fax: [phone] Email: [e-mail]

International Thermal Research Ltd. - 17 -
Warranty Information
Warranty cards must be filled in completely, signed by the Owner and Dealer and
returned to ITR within 30 days of the date of the initial “in-service” date.
General Warranty
ITR warrants the OASIS® CH50, AND OASIS® COMBI (referred to as
“heater(s)”) DISTRIBUTION MODULE and all accessories or other supplied
components with the original purchase to be free of defects in materials and
workmanship under design usage and service conditions for ONE (1) year
from the heater “in-service” date. Warranty replacement parts are covered for
the remainder of the heater’s warranty.
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

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•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 resulting from the
warrantable failure
Not Covered Under Warranty
Warranty will be voided or not extended in the following circumstances:
•Owner fails to notify ITR or the authorized ITR dealer from which the Product was
originally purchased about a warrantable failure and to obtain prior written
approval for warranty repair.
•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.

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. 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.
4. 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 schedule.
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International Thermal Research Ltd.
Copyright © 2011 – All Rights Reserved
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