ITR POLAR HD, Installation And Operating Manual

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Section 7, Plumbing the System
7-4 The POLAR™ HD Heating Module
• 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 POLAR™ HD Heating Module’s circulating pumps are one of the
most critical parts of the system. Never let the pumps run dry or
you will damage the impeller. This is not covered under warranty.
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 POLAR™ HD Heating Module and heater
hose:
1 The supply and return coolant connections are on top of the
POLAR™ HD Heating Module and are 1/2” male NPT fittings.
The return coolant input to the POLAR™ HD Heating Module is
labeled “Inlet” and the supply coolant output from the POLAR™
HD 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 POLAR™
HD Heating Module, refer to Section 9, Installing the
Distribution Module.
NOTICE