Owner’s Manual – Solar Water Heaters
17
H3165 029664 Rev. B
Relief Valve:
The Pressure & Temperature Relief (PTR)
Valve is supplied in the Accessories Kit.
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” on the left
hand side of the water heater towards the
top. 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.
It is normal for water to drip from the
discharge pipe of the PTR Valve during
heating cycles.
Relief Valve Discharge Pipe:
The discharge pipe 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.
Generally, a separate drain line must be run
for the valve although it may be joined with
the drain line from the expansion control
valve under certain circumstances.
Steam or hot water may be discharged
from the drain line. Ensure the drain line
discharges away from the person operating
the drain valve.
Relief Valve