Section 7, Plumbing the System
International Thermal Research
7-5
7.4 Coolant Plumbing Installation
Procedure
To install and connect the Oasis
®
Chinook and heater hose:
1 Connect a 1/2" NPT (male) to 3/4" hose barb fitting onto the
Oasis
®
Chinook coolant supply connection. Connect a 1/2" NPT
(female) to 3/4" hose barb fitting onto the Oasis
®
Chinook
coolant return connection. Tighten all connections to a leak
free condition using an appropriate thread sealant.
2 Hose and/or tubing used to connect to the Oasis
®
Chinook
supply and return connections must be heavy duty heater
hose, minimum 3/4” I.D, or 5/8” PEX.
Install the cabin fans for the space heating loop by connecting
the supply line to the lower port on the cabin fan and the
outlet to the next fan in the series loop. Each cabin fan heater
should be plumbed so that fluid supply enters the bottom of
the heating core and exits from the top. This helps keep air
from being trapped in the cabin fan core. Ensure proper
direction of flow. Refer to Figure 7-1: Oasis
®
Chinook
Overview for the location of the fittings. Ensure there are no
kinks or sharp bends that might restrict the fluid flow. See
Figure 7-3: Three Approved Methods of Installing Heater Hose
(Consult ITR for Alternative Methods and Products) for
methods of attaching the heater hose.
3 Once the space heating loop has been set up with the cabin
fans, connect the space heating loop supply line to the
"Heating Loop 1 Supply" connection on the Oasis
®
Chinook.
Connect the space heating return line to the "Heating Loop 1
Return" connection.
4 The Oasis
®
Chinook has an overflow fitting located on the top of
the unit. Ensure a four (4) quart minimum overflow bottle is
attached to the overflow fitting. The connection point should be
from the bottom of the overflow bottle.
