CONNECTIONS – PLUMBING
37
TEMPERATURE PRESSURE RELIEF VALVE
The water heater has a temperature pressure relief valve connection on its left
hand side.
The temperature pressure relief valve is shipped in a plastic bag attached to the
water heater. 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.
To fit the relief valve:
•
Seal the thread with an approved thread sealant such as Teflon tape - never
hemp. Make sure tape does not hang over the end of the thread.
•
Hand tighten the valve into the opening
marked “Relief Valve” (refer to the
on page 33).
•
Using a spanner engaged on the valve’s spanner flats and applying medium
pressure to tighten, turn the relief valve an additional ½ to 1 ½ turns to secure
and make the joint water tight, leaving the valve drain pointing downwards.
Warning:
Do not use a pipe wrench or poor fitting tool on the valve body
nor over tighten the valve, as this could damage the valve and prevent safe
operation.
•
Operate the easing lever on the valve to check the smooth operation of the
valve plunger. It is very important the lever is raised and lowered gently. The
lever should move smoothly and without undue force.
If the lever cannot be moved or is jerky in its movement, then the valve has
been damaged and must be replaced.
•
A copper drain line must be fitted to the temperature pressure relief valve
(refer to
on page 38).
•
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.
The
flexible
insulation
collar
supplied with the temperature
pressure relief valve meets these
requirements and must be placed
over the body of the valve (refer to
the
on page 37).
flexible insulation collar
SK7400 A4
REV AD 02/13
USE TEFLON TAPE
FIT SUPPLIED INSULATION TO
VALVE AS SHOWN
