Heat Transfer Fluid/Plumbing Installation Procedure - ITR Oasis® Zephyr ™ Oasis Zephyr HW Installation And Operating Manual

7-2
7.2 Heat Transfer Fluid (Propylene Glycol)
Plumbing Installation Procedure
Refer to Figure 7-3: Three Approved Methods of Installing Heater
Hose. and Figure 7-1: Oasis
connection points.
1. Hose and/or tubing used to connect to the Oasis
must be heavy duty heater hose, minimum 3/4" I.D, and or
5/8" Pex. Domestic water connections are usually made
with 1/2" Pex.
2. The heat transfer fluid outlet and return connections are
also on top of the heater and labeled Heat Loop Supply and
Heat Loop Return. The Heat Loop Supply connection is
made by inserting the red 5/8" pex tube, extending from
the heater, into the 3/4" ID heating loop supply hose.
Note; make sure a brass "pex-insert" (included) is inserted
into the pex to prevent the pex tube from deforming under
tension from the hose clamp. The Heat Loop Return
connection is made by connecting the 3/4" ID heating loop
return hose to the 3/4" brass hose barb connection labeled
"Heat Loop Return". Ensure proper direction of flow.
3. All connections must be clamped (constant tension spring
clamps are recommended as they do not damage the hose
and retain clamp tension while the hose compresses). All
connections must be tested to be leak free. ITR warranty
does not cover damage caused by leaks from connections
made during installation.
4. 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. Ensure there are no
kinks or sharp bends that might restrict the fluid flow. All
connections must be clamped.
5. Once the space heating loop has been set up with the cabin fans,
connect the space heating loop supply line to the "Heating Loop
Supply" connection on the Oasis
heating return line to the "Heating Loop Return" connection.
Installation Manual for Oasis® Zephyr™ HW Heating System
Section 7, Plumbing the System
®
Zephyr Overview for the location of
®
Zephyr. Connect the space
®
Zephyr