Technical data

37
CONNECTIONS – PLUMBING
All plumbing work must be carried out by a qualified person and in accordance with the requirements of the
Standard AS/NZS 3500.4, and all local codes and regulatory authority requirements. In New Zealand, the
installation must conform to Clause G12 of 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.
It is necessary to remove the pipe cover (if attached) from underneath the gas booster, by undoing the retaining
screws, in order to make the water and gas connections to the water heater. Refit the pipe cover at the
completion of the installation.
CONNECTION SIZES
 Hot water connection: Rp 3/4.
 Cold water connection: Rp 3/4.
 Tempered water connection: Rp 3/4
 Solar hot (from collector) connection: DN15 compression fitting.
 Solar cold (to collector) connection: DN15 compression fitting.
 Temperature Pressure Relief valve connection: Rp 1/2.
 Solar circuit pressure relief valve connection: G 1/2.
 Gas connection: R 3/4.
WATER INLET AND OUTLETS
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 than conetite or O-ring fittings of the
solar collectors.
An isolation valve and non-return valve must be installed on
the cold water line to the water heater. An acceptable
arrangement is shown in the diagram. Refer also to “Hot
Water Delivery” on page 23 and to “Mains Water Supply” on
page 21. The plumbing arrangements for the cold water
inlet, tempered water and hot water outlets are shown on
page 37. The solar hot and solar cold pipe connections are
shown on page 40.
A disconnection union must always be provided at the cold
water inlet, tempered water and hot water outlets on the
water heater to allow for disconnection of the water heater.
It is necessary to remove the brass plug from the hot water
outlet fitting if a hot water line is to be installed. This plug
can be used to plug the tempered water outlet if a tempered
water line is not being installed. Refer to the diagram for the
connection points to the water heater.
Insulation used on the tempered water and hot water lines
must extend up to the outlets of the water heater. The valve
and fittings must also be insulated up to the hot water outlet
of the gas booster.
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
tempered
water outlet
hot water
outlet
cold water
inlet