ITR POLAR HD, Installation And Operating Manual

Page: 66 / 80

Section 9, Installing the Distribution Module
9-4 The POLAR™HD Heating Module
Figure 9-3: Distribution Module Fittings Location.
All fittings on the POLAR™HD Distribution Module require two
wrenches when tightening. One wrench must be placed on the
module fitting and held in place to prevent this fitting from being
overstressed. The other wrench can be used to tighten the
matching half of the fitting onto it. Failure to follow this
procedure will damage the POLAR™HD Distribution Module, and
the fittings.
• The Domestic water connections are located on top of the
module. The Cold water supply can be connected using a ½”
NPT fitting. The maximum water supply pressure to the
module is 150 PSI (10 bar). The Hot water Outlet
temperature is regulated by an internal mixing valve factory
set at 120F (49°C). If needed this valve can be adjusted in a
range from 100F (38°C) to a maximum of 145F (63°C). For
more details about adjusting the temperature see chapter
9.9. A domestic water drain is provided for winterizing
purposes. This will prevent damage to the internal heat
exchanger due to freezing water. See Figure 9-4: Domestic
Hot water system plumbing.
All fittings, hose, tube and fitting sealant involving the domestic
water must be food safe and approved for use with domestic
water and rated for the domestic water system pressure.
NOTICE
WARNING