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58
CONNECTIONS – PLUMBING
All plumbing work must be carried out by a qualified person and in compliance with the Standard
AS/NZS 3500.4 and all local codes and regulatory authority requirements. In New Zealand the installation
must also conform to the New Zealand Building Code.
All gas work must be carried out by a qualified person and in compliance with the Standard AS 5601 or
AS/NZS 5601.1, as applicable under local regulations, and all local codes and regulatory authority
requirements.
CONNECTION SIZES
Model
871 624
871 E24
875 624
875 E24
871 E26
875 E26
Hot water connection
R 3/4
R 3/4
Cold water connection
R 3/4
R 3/4
Gas inlet connection
R 3/4
R 3/4
WATER INLET AND OUTLET
All pipe work must be cleared of foreign matter before
connection and purged before attempting to operate the water
heater. All olive compression fittings must use brass or copper
olives. Use an approved thread sealant such as Teflon tape on
all other threaded joints.
A full flow gate valve or ball valve must be installed on the cold
water line or solar preheat water line to the water heater. A non-
return valve or stop tap must not be installed. An acceptable
arrangement is shown in the diagram. Refer also to “Hot Water
Delivery” on page 49 and to “Mains Water Supply” on page 48.
A disconnection union must always be provided at the cold
water inlet and hot water outlet on the water heater to allow for
disconnection of the water heater.
Insulation used on the cold and hot water lines must extend up
to the cold water inlet and hot water outlet of the water heater.
Notes:
It is essential all pipe connections be correctly aligned, otherwise component connections within the
water heater may be strained and / or components themselves misaligned. It is recommended also,
wherever possible, pipe connections be made at the water heater first and final pipe runs be made in
soft copper pipe to allow some adjustment for misalignment.
Use the spanner flats on the water heater fittings and take care to avoid twisting the water inlet and
outlet pipes inside the jacket.
871 series 624, E24 and E26 model water heaters when installed as an in-series gas booster to a solar
water heater do not need to be installed with a solar transfer valve if the maximum solar preheat water
heater does not exceed 80°C.
The maximum supply temperature to the water heater when used as an in-series gas booster for a solar
water heater is 80°C.
Gas Water Heater
Cold (or Solar Preheat) and Hot Water
and Gas Connection Details
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