Owner’s Manual – Proflo Electric Storage Water Heaters
3
H0421 0421 Rev. K
Plumbing Connections
Pressure & Temperature Relief
Valve
The Pressure & Temperature Relief Valve
is supplied loose with the water heater.
The valve rating is:
80, 125 and 160 litre models:
- 1,400 kPa
250, 315 and 400 litre models:
- 1,000 kPa
The PTR valve must be installed directly
into the top socket marked “RELIEF
VALVE”. The drain line from this valve
must run in a continuously downward
direction in a frost-free ambient position
with the discharge end left open to
atmosphere permanently.
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 AS/NZS 3500.4 for guidance on
these types of installations).
After the cold water has been
connected, open the PTR Valve for
approximately 10 seconds by lifting the
lever on the valve to ensure water is
relieved to waste through the relief drain
pipe. Lower lever gently and check that it
closes correctly.
The PTR Valve must not be tampered with
or removed. The water heater must not
be operated unless this valve is fitted and
in working order.
The PTR Valve should be checked for
adequate performance or replaced at
intervals not exceeding 5 years, or less in
areas where local regulations apply.
Important:
The PTR Valve and its
drain outlet pipe must not be sealed or
blocked. It is normal for the PTR valve
to leak a small amount of water during
heating cycles.
Warning:
A separate drain line must be
run for this relief valve. It is not permitted
to couple drain lines from relief valves
into a single common drain line.
Note:
Brass plugs are supplied with
the water heater to plug off the unused
fittings. Ensure that a sealing material is
applied to the plugs to prevent leaking.
Cold Water Connection
An approved isolating valve, non
return valve, line strainer (optional but
recommended), and union must be
fitted between the supply main and
either of the RP¾/20 sockets marked
“INLET” at the bottom of the water
heater. All fittings must be approved by
the relevant Authority. See the diagram
on page 4 for details.
Note for S.A. and W.A.:
It is a state
requirement that a pressure relief valve
be fitted on the cold water supply line
between the non return valve and the
water heater. See the diagram on page
4 for details.
