Section 7, Plumbing the System
7.3 What NOT to Do
Don’t use low-quality heater hose.
NOTICE
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 WaterHeater™ by ITR and heater hose
(see Section 1 – Overview, Figure 1-1: Hot Water Heater and
Space Heating Module, if installed, and Section 9 – Installing the
Space Heating Module , Figure 9-1: Space Heating Module
Plumbing Fittings, for details):
1
The supply and return plumbing connections are on the front
lower face of The WaterHeater™ by ITR and are 1/2” female
NPT fittings. The supply input is labeled “Cold Water Inlet” and
the hot water output is labeled “Hot Water Outlet”. Ensure
proper direction of flow.
2
Two male 1/2” NPT PEX tube fittings (not supplied) must be fit
into the supply and return fittings and tightened to a leak free
condition.
3
Connect the domestic water holding tank to the Cold Water
Inlet. In some installations, a check valve may have to be
obtained and installed on the cold input line to The
WaterHeater™ by ITR to prevent warm water from backfilling
to the water storage tank. Check the appropriate standards
and regulations. Ensure there are no kinks or sharp bends that
might restrict the fluid flow. If bends are required for PEX
tubing, fit the tubing into a plastic bend support. Do not use
rubber heater hose for potable water plumbing. See Figure 7-
2: The Approved Method of Installing Heater Hose (Consult ITR
for Alternative Methods and Products) for methods of attaching
heater hose.
7-4
The WaterHeater™ ITR
