ITR OASIS NE User manual

OASIS
®NE Heating
System
Installation and
Operating Manual
Diesel and AC Heating System
for Recreational Vehicles and Yachts
CAN/CSA-C22.2 No.110-94 (R2014)
CSA B140.10-06 (R2015), CSA B140.0-03 (R2013)
UL307A (Edition 8), UL174 (Edition 11)

Copyright © September 2016
International Thermal Research
IN CANADA: IN THE UNITED STATES:
2431 Simpson Road 11915 NE 56th Circle Suite B
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: [email protected]
Website: http://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.

Table of Contents
iv Draft: Oct 15/03 Installation Manual for RV Heater System
Table of Contents
Section 1, Overview .................................................. 1-1
1.1 Unpacking the Oasis®NE Heating System ........1-2
1.2 Protect Your Warranty....................................1-2
1.3 Oasis®NE Heating System Features ................1-3
1.4 Critical Factors ..............................................1-5
1.5 Equipment, Tools and Skills ............................1-6
1.6 Testing and Inspection...................................1-7
Section 2, Mounting the Oasis®NE Heating System... 2-1
2.1 Before You Begin...........................................2-1
2.2 Identifying Your Oasis®NE Heating System
Model .......................................................2-2
2.3 Your Mounting Location..................................2-2
2.4 What NOT to Do............................................2-4
2.5 Oasis®NE Mounting Procedure........................2-4
2.6 Zone Control Board Mounting Procedure...........2-5
2.7 Remote Operating Panel Mounting Procedure....2-6
Section 3, Installing the Exhaust System .................. 3-1
3.1 Before You Begin...........................................3-1
3.2 Mounting Location .........................................3-1
Recommended Exhaust Outlet Locations..................3-1
Recommendation for Installation ............................3-2
What NOT to Do ...................................................3-4
3.3 Procedure.....................................................3-4
Section 4, Installing the Fuel System ........................ 4-1
4.1 Before You Begin...........................................4-1
4.2 Fuel System Installation.................................4-1
Recommendations for Installation ...........................4-1
4.3 What NOT to Do............................................4-2
4.4 Procedure.....................................................4-3

Table of Contents
International Thermal Research Ltd. Draft: Oct 15/03 v
Section 5, Installing Fan Heaters............................... 5-1
5.1 Before You Begin .......................................... 5-1
5.2 Fan System Operation ................................... 5-2
Features ..............................................................5-2
Multiple Zone Heating ...........................................5-3
Accessories and Components Needed ......................5-3
5.3 What NOT to Do ........................................... 5-4
5.4 Mounting Locations ....................................... 5-4
5.5 Procedure .................................................... 5-5
Section 6, Wiring the Electrical System ..................... 6-1
6.1 Before You Begin .......................................... 6-1
6.2 Oasis®NE 12 VDC......................................... 6-2
6.3 Oasis®NE 120 VAC ....................................... 6-3
6.4 Wiring The Zone Control Board....................... 6-4
Cabin Fan Leads ........................................... 6-4
Thermostat Leads ......................................... 6-5
6.5 What NOT to Do ........................................... 6-5
Section 7, Plumbing the System ................................ 7-1
7.1 Before You Begin .......................................... 7-1
7.2 Coolant Plumbing Installation ......................... 7-2
7.3 What NOT to Do ........................................... 7-4
7.4 Coolant Plumbing Installation Procedure .......... 7-5
7.5 Potable Water Plumbing Installation ................ 7-6
7.6 Engine Plumbing Installation .......................... 7-7
7.7 Procedure For Filling/Purging The Oasis®NE
Heating System ........................................... 7-8

Table of Contents
vi Draft: Oct 15/03 Installation Manual for RV Heater System
Section 8, Operating the Oasis®NE Heating System.. 8-1
8.1 Features of your Oasis®NE Heating System .....8-1
8.2 Operating Instructions for the
Oasis®NE Heating System .............................8-3
8.3 Turning the Power to the
Oasis®NE Heating System ON ........................8-4
8.4 Activating the Burner (Primary)
and AC Heat (Supplemental) from the
Remote Operating Panel.................................8-5
8.5 Activating the Cabin Fan Heaters
through the Thermostats................................8-6
8.6 Activating the Potable Hot Water.....................8-6
8.7 Potable Water Temperature Adjustment ...........8-7
8.8 Activating the Engine Heat & Pre-heat .............8-8
8.9 Functions of the Remote Operating Panel .........8-9
8.10 Functions of the Oasis®NE Control Panel........ 8-11
8.11 Functions of the Zone Control Board .............. 8-12
8.12 Potable Water and Space Heating Priority....... 8-14
8.13 Maintenance ............................................... 8-15
8.14 Protecting the Heating System ...................... 8-16
8.15 General Troubleshooting .............................. 8-17
Warranty Information & Warranty Card

Table of Contents
International Thermal Research Ltd. Draft: Oct 15/03 vii
List of Figures
Figure 1-1 Oasis®NE Heating System ........................ 1-1
Figure 1-2 Oasis®NE Heating System Overview .......... 1-5
Figure 2-1 Oasis NE Heating Dimensions .................... 2-3
Figure 2-2 Oasis NE Mounting Brackets ...................... 2-5
Figure 2-3 Zone Control Board .................................. 2-6
Figure 2-4 Remote Operating Panel Mounting.............. 2-6
Figure 3-1 Installing the Exhaust System
(Bottom Exhaust)..................................... 3-6
Figure 3-2 The Exhaust Hole Location & Mounting
Template ................................................ 3-7
Figure 3-3 The Exhaust Goose neck Configuration........ 3-7
Figure 5-1 Wiring the Fan’s Aquastat.......................... 5-2
Figure 5-2 Mounting a Low Profile Cabin Fan ............... 5-6
Figure 5-3 Installing a Relay for Add’l Fan Amperage ... 5-6
Figure 6-1 System Wiring ......................................... 6-2
Figure 7-1 Oasis®NE Overview ................................. 7-3
Figure 7-2 Plumbing Oasis®NE For 5 Zones ................ 7-3
Figure 7-3 Three Approved Methods of Installing
Heater Hose (consult ITR for alternative
methods and products) ............................. 7-6
Figure 7-4 Potable Hot Water System Plumbing........... 7-7
Figure 7-5 Engine Heat / Pre-heat System Plumbing .... 7-8
Figure 7-6 Filling/ Purging Oasis®NE Heating System
Engine Heat / Pre-heat System Plumbing .... 7-9
Figure 8-1 Oasis®NE Heating System Overview .......... 8-3
Figure 8-2 Oasis®NE Main Control Panel .................... 8-4
Figure 8-3 Mixing valve location ................................ 8-7
Figure 8-4 Remote Operating Panel........................... 8-9
Figure 8-5 Zone Control Board ................................ 8-13
Figure 8-6 Zone Control Board Proority Jumper ......... 8-14

International Thermal Research 1-1
Overview
Thank you for purchasing the Oasis®NE Heating System for
recreational vehicles and yachts (for use on vessels over 65 feet in
length).
The Oasis®NE Heating System is CSA/UL certified only for
installation into Recreational Vehicles, Manufactured Homes,
and Mobile housing.
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®NE heating system
Section
1
NOTICE

Section 1, Overview
1-2 The Oasis®NE Heating System
1.1 Unpacking the Oasis®NE Heating
System
When you receive the Oasis®NE Heating System:
1
Unpack it carefully.
2
Check each component against the shipping list to ensure that
you have everything and that all parts arrived undamaged.
3
If you discover any missing or defective parts call ITR
immediately.
4
If you are not installing the Oasis®NE Heating System right
away, secure all components so none will be misplaced.
5
Before installing the Oasis®NE Heating System read the
rest of this Installation and Operating Manual.It contains
critical information for a proper installation.
A properly installed Oasis®NE Heating System 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®NE
Heating System 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.

Section 1, Overview
International Thermal Research 1-3
No Warranty will be extended to improper installations. Use of any
unapproved materials, equipment or installation procedures will
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®NE Heating System Features
The Oasis®NE Heating System uses a 50,000 BTU (true output)
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 to provide an additional 10,000 BTU of
heat. The Oasis®NE Heating System heats the coolant fluid to
provide a source of heat for all hydronic space heating needs.
Through the use of its integral distribution pumps, the Oasis®NE
Heating System 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. The Oasis®also
incorporates engine heat and preheat functions. (see Figure 1-2:
Oasis®NE Heating System).
Other features of the Oasis®NE Heating System include:
Built in distribution pumps and heat exchangers for heating
multiple zones and also producing domestic hot water. Heat
exchanger also allows engine pre-heating (optional) as well as
using engine waste heat. The Zone Board Controls up to five
space heating zones.
Support for potable hot water demand. The mixing valve is
factory set to limit the maximum temperature of the heated
potable water to 120ºF (49°C) with a total hot water demand of
1.5 GPM or less, and an incoming water temperature of 55ºF
(13ºC) or higher.
Easy to install and field serviceable with system hookups and
connections easily accessible from the top of the heater.
Easy to fill and purge zero pressure system.
Easy to drain.
•Efficient
•Clean
•Quiet
•Compact
•Safe
•Rugged
•Reliable
•Economical

Section 1, Overview
1-4 The Oasis®NE Heating System
A high-temperature, stainless steel burner and stainless steel
jacket.
7.5 US gallon, welded, insulated stainless steel coolant tank that
minimizes heat loss and optimizes heat recovery.
Domestic water flow switch for quick response to domestic hot
water demand.
Low coolant level switch.
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 (CSA/UL certified for diesel #1 and #2).
Exhaust has minimal smoke and smell.
Fan assisted sealed combustion chamber is designed to use
outside combustion air.
Low amperage draw ignition.
Electronically-controlled system featuring:
automatic Safety Shutdown;
manual-resettable aquastats for safety overheat protection.
LED indicators on the Control Panel for diagnostics.
Patented, proprietary flame sensor.
Remote Operating Panel with ON/OFF switch for the diesel
burner, AC elements, and engine pre-heat, if installed.
Control Panel with buttons for Power, Bypass, Reset, and
indicator LED’s for operational and diagnostic information.

Section 1, Overview
International Thermal Research 1-5
Figure 1-2: Oasis®NE Heating System Overview
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:
Mounting location restrictions for the Oasis®NE Heating System
and exhaust outlet (to reduce noise, vibration, heat loss, etc.).
Length, routing and sizing of fluid lines, air-flow tubing, exhaust
piping and wiring.
Unrestricted vent required to draw in 100% outside air for
combustion.
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.
Pay attention to the
notices of “Danger”
“Warning” “Caution”
and “Notice” in this
manual.

Section 1, Overview
1-6 The Oasis®NE Heating System
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 (for
yachts) 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 bends are present.).
Exhaust collar.
ITR-muffler with straight-through design.
2" air intake collar for connecting fresh outside air
2" air intake hose for connecting to fresh air intakes of the Oasis
NE.
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 Oasis NE hose fittings to interior fans).
Potable water hose/PEX to connect the Oasis NE-S potable water
hose/PEX fittings to the domestic water system.
Overflow tank to connect to the Oasis®Heating Module with
clear plastic 5/8” hose; tank must be made of heavy-duty
plastic, vented with a screw-down cap, have an overflow outlet,
and sturdy enough to mount firmly to a vertical surface.

Section 1, Overview
International Thermal Research 1-7
Up to five (5) thermostats (DC compatible) to allow temperature
regulation of the heating zones.
1.6 Testing and Inspection
After all components have been properly installed according to
standard practices, RVIA or ABYC (for yachts) standards, and the
recommendations of this Installation and Operating Manual, the
Oasis®NE Heating System 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.

International Thermal Research 2-1
Mounting –Oasis®NE Heating
System
2.1 Before You Begin
Plan the location of the Oasis®NE Heating System 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®NE Heating System:
Oasis®NE Heating System weight when full (174 lbs).
Ventilation requirements.
Exhaust outlet location and maximum acceptable length,
including all 90 degree bends. Refer to section 3.2.
Thru hull location and waterline (yachts). Refer to section
3.2.
Potential for vibration and jarring.
Length of run from fuel source to heater. Refer to section
4.2.
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®NE Heating System, including the Zone Control
Box, heat exchangers, overflow tank, batteries, etc.
Section
2

Section 2, Mounting the Oasis®NE Heating System
2-2 The Oasis®NE Heating System
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®NE Heating System
may not operate properly, safety may be compromised, and your
Warranty may be voided.
2.2 Identifying Your Oasis®NE Heating
System Model
As the owner, you must be fully aware of the controls and
operating features particular to your model of the Oasis®NE
Heating System. This is essential for the proper functioning and
life of your Oasis®NE Heating System as well as protecting your
warranty. Your model can be identified by locating the serial
number label on the outside case of the Oasis®NE Heating
System. The serial number identifies the model type through the
first series of letters and numbers.
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®NE Heating System (i.e. 174 lbs. x 2 =
348lbs./79.0 KG x 2 = 158 KG) and must be of a non-
combustible and non absorptive surface.
Oasis®NE Heating System is 12.3”H x 18.8”W x 29.7” D.
(31.25 cm x 47.75 cm x 75.4 cm), see Figure 2-1: Oasis NE
Dimensions.
Oasis®NE Heating System must be installed in a compartment
which is completely isolated from the atmosphere of living
spaces.
Combustion air must be drawn from an outside source and
cannot contain any combustible gases.
WARNING

Section 2, Mounting the Oasis®NE Heating System
International Thermal Research 2-3
Mount the unit with the front panel facing out and accessible.
This mounting position simplifies installation and maintenance.
Leave the left side of the unit accessible for maintenance.
The Oasis®NE Heating System must be mounted in an area
that provides unrestricted access to the front and left side
panels. Allow space for connection to the fuel, coolant, and
potable water lines, as well as the power, exhaust, and air
intake connections. The following are the minimum required
clearances: 8” top clearance, 12" front clearance, 12" left side
clearance; 0” clearance to all other Oasis®NE Heating System
surfaces. Allow 1” clearance on the right side for attaching the
mounting brackets.
Oasis®NE Heating System must be mounted horizontal and
level using eight, 1/4” through bolts and 1” diameter fender
washers, lock washers and nuts.
Figure 2-1: Oasis NE Dimensions

Section 2, Mounting the Oasis®NE Heating System
2-4 The Oasis®NE Heating System
Oasis®NE Heating System must not be installed or operated in any
compartment with flammable gases.
If the Oasis®NE Heating System 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 hose and exhaust pipe have no leaks and
are well fastened to the heater, muffler and thru-hull fitting.
Assembly parts that may cause injury through accidental contact
should be protected.
This is a direct vent system. The combustion air must be drawn
directly from the outside, without coming in contact with air that
can infiltrate the living areas. See section 3.3.
It is recommended that a catchpan be placed under the Oasis®
NE-S Heating System to contain any unexpected leak.
Choose a sturdy surface in a location that won’t be unduly
affected by vibration and jarring from 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’, including 90 degree bends. See section 3.2.
2.4 What NOT to Do
Don’t mount the Oasis®NE Heating System in the rear of the
coach or yacht underneath the sleeping area. The sound of the
Oasis®NE Heating System cycling on and off may disturb light
sleepers.
2.5 Oasis®NE Mounting Procedure
After choosing the mounting location for the Oasis®NE Heating
System, mount the unit and ensure it is level. Secure the Oasis®
NE Heating System in place (against the wall, floor or a mounting
platform) using four (4) mounting brackets, eight (8) x 1/4”
! DANGER
! WARNING
! DANGER

Section 2, Mounting the Oasis®NE Heating System
International Thermal Research 2-5
through bolts (or wood screws), and 1” diameter fender washers,
lock washers, and nuts. (See Figure 2-2: Oasis NE Mounting
Brackets.).
Figure 2-2: Oasis NE Mounting Brackets
2.6 Zone Control Board Mounting
Procedure
Mount the Zone Control Box (containing the Zone Control
Board) vertically, close to the Oasis®NE. Allow sufficient room
to access the internal fuses as well as to view the display LED’s
on the front of the board.
Mount the bracket against a wall using 2 flat head screws. The
distribution module zone box will then click onto the bracket.
See Figure 2-3.

Section 2, Mounting the Oasis®NE Heating System
2-6 The Oasis®NE Heating System
Figure 2-3: Zone Control Board
2.7 Remote Operating Panel Mounting
Procedure
The Remote Operating Panel is mounted inside the Coach or Yacht,
in an easy to access location. An opening for the remote panel
must be cut in the wall or mounting panel. The Remote Operating
Panel will be screwed in place using the 4 mounting holes.
Figure 2-4: Remote Operating Panel Mounting

International Thermal Research 3-1
Installing the Exhaust System
3.1 Before You Begin
For efficient and safe operation of the Oasis®NE Heating System
follow all recommendations for properly installing the exhaust. Any
deviations from these must be approved in advance by ITR.
Although the heater’s exhaust produces very low carbon monoxide
emissions, caution is still advised:
Do not operate the Oasis®NE Heating System in an enclosed
area unless there is adequate ventilation.
This is a direct vent system. The combustion air must be
drawn directly from the outside, without coming in contact
with air that can infiltrate the living areas. See section 3.3.
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®NE Heating System. 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®NE Heating System.
Section
3
DANGER