Installation and Owner’s Manual – Airoheat Heat Pump
9
H4120 025941 Rev. D
Relief Valve:
The Pressure & Temperature Relief (PTR)
Valve is supplied inside the electrical
cover of the water heater. Instructions
on how to remove the electrical cover
can be found on page 11. Discard the
clear plastic packaging containing the
PTR Valve and brass plugs.
The PTR Valve rating is 1,000 kPa.
The PTR Valve rating is also shown
on the compliance plate. The PTR
Valve must be installed directly into the
RP½”(DN15) socket marked “RELIEF
VALVE” at the top of the water heater.
Ensure that a sealing material is applied
to the PTR Valve to prevent water leaks.
The PTR Valve and its drain line must
not be sealed or blocked.
The PTR Valve is not intended to enable
connection of the water heater to
supplementary energy sources such as
solar panels or slow combustion stoves.
Refer to AS/NZS 3500.4 for guidance
on these types of installations.
It is normal for the valve to leak a small
amount of water during heating cycles.
Relief Valve Drain Line:
The drain line from the PTR Valve must be
made of copper and run in accordance
with the requirements of AS/NZS 3500.4.
It must be installed in a continuously
downward direction in a frost free
environment.
A separate drain line must be run for this
valve. The drain line must not be directly
connected to any other copper piping.
If the drain line is to be fixed to the water
heater case, the pipe clamps and screws
supplied in the included Dielectric Fittings
Kit (Part No H3189) must be used. Please
refer to the photograph below.
Do not use standard metal pipe
saddles.
Condensate Drain Line:
A condensate drain point is located under
the bottom louvre at the rear of the water
heater. A drain line must be connected
to this point and run so that it discharges
clear of the water heater.
The Condensate Drain Line must not be
connected to the Relief Valve Drain Line
although they may both discharge to the
same point.
Plumbing Connections
