CONNECTIONS – PLUMBING
33
TEMPERATURE PRESSURE RELIEF VALVE
The temperature pressure relief valve is shipped behind the front cover. The
temperature pressure relief valve must be fitted before the water heater is
operated. Before fitting the relief valve, make sure the probe has not been bent.
Seal the thread with Teflon tape - never hemp. Make sure the tape does not
hang over the end of the thread.
Screw the valve into the correct opening (
refer to the installation diagram
on
page 30) leaving the valve drain pointing downwards. Do not use a wrench on
the valve body - use the spanner flats provided. A copper drain line must be
fitted to the temperature pressure relief valve (refer to
"Relief Valve Drain"
on
page 34).
The valve must be insulated with
closed cell polymer insulation or
similar (minimum thickness 9 mm)
and the insulation installed so as
not to impede the operation of the
valve. The insulation must be
weatherproof and UV resistant if
exposed.
An insulation collar is supplied with
the temperature pressure relief
valve and must be placed over the
body of the valve, prior to fitting the
valve to the water heater (refer to
the
diagram
on page 33).
EXPANSION CONTROL VALVE
Local regulations may make it mandatory to install an expansion control valve
in the cold water line to the water heater. In other areas, an expansion control
valve is required if the saturation index is greater than +0.4 (refer to
“Water
Supplies”
on page 15).
The expansion control valve must always be installed after the non return valve
and be the last valve installed prior to the water heater (refer to the
cold water
connection diagram
on page 32). A copper drain line must be fitted to the
expansion control valve (refer to
"Relief Valve Drain"
on page 34).
The valve must be insulated with closed cell polymer insulation or similar
(minimum thickness 9 mm) and the insulation installed so as not to impede the
operation of the valve. The insulation must be weatherproof and UV resistant if
exposed.
SK7400 A4
REV AD 02/13
USE TEFLON TAPE
FIT SUPPLIED INSULATION TO
VALVE AS SHOWN
