46
CONNECTIONS – PLUMBING
All plumbing work must be carried out by a qualified person and in accordance with the requirements of
AS/NZS 3500.4 and all local codes and regulatory authority requirements.
Warning:
Certain types of plastic pipe, such as polybutylene pipe, are not suitable to be used as a hot
water pipe between:
•
this water heater and a temperature limiting device, and
•
this water heater and a hot water outlet if a temperature limiting device is not installed.
This water heater can produce water at a temperature and pressure which can exceed the performance limits
of these types of pipe. This may result in pipe failure leading to severe water damage to the property. If one of
these types of plastic pipe is used as a hot water pipe in the property, then a temperature limiting device must
be installed between the water heater and this pipe work.
Note:
The solar storage tank of a solar water heater should not be installed as part of a circulated hot water
flow and return system in a building. The benefits of solar gain will be significantly reduced. If a circulated flow
and return system is required, refer to
“Circulated Hot Water Flow and Return System”
on page 32.
CONNECTION SIZES
•
Hot water connection:
Rp 3/4
•
Cold water connection:
Rp 3/4
•
Solar hot (from collector) connection:
DN15 compression fitting to Service valve
– (solar hot inlet to tank: Rp 3/4)
•
Solar cold (to collector) connection:
DN15 compression fitting to pipe at circulator outlet
– (solar cold outlet from tank: Rp 3/4)
•
Relief valve connection:
Rp 1/2
•
Service valve drain connection:
DN15 compression fitting
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 sealing threads. Conetite or O-ring fittings do not require a thread sealant.
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
on page 31
and to
on page 30. The plumbing arrangements for the
solar hot and solar cold pipes
are shown on page 39.
OR
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