Rheem GAS BOOSTED SOLAR WATER HEATER Specifications download pdf (Page 44)

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 with 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. In New Zealand, the installation must also conform with NZS 5261, as applicable under local

regulations.

Warning: Certain types of plastic pipe, such as Poly-butylene 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 and energy

gained from the sun lost through the pipe work. If a circulated flow and return system is required, it is

necessary to connect the return line after the solar storage tank and prior to the in-series water heater

supplied from the solar water heater. Refer to “Circulated Hot Water Flow and Return System” on page 34.

CONNECTION SIZES

Hot water connection: RP¾/20

Cold water connection: DN20 compression fitting (cold water inlet of tank: RP¾/20).

Solar hot (from collector) connection: DN15 compression fitting.

(solar hot water inlet of tank: RP¾/20).

Solar cold (to collector) connection: DN15 compression fitting.

Relief valve connection: RP½/15.

Gas inlet: RP½/15.

Bleed valve connection: G1.0B.

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 thread sealing tape or

approved thread sealant on all fittings.

An isolation valve and non return valve must be used on the cold water line to the water heater. A non-return

valve must be fitted on the cold water supply to this water heater in compliance with Clause 5.9.1 of

AS/NZS 3500.4. Due to the higher temperatures generated by solar water heaters, an additional effective

back-flow prevention device also should be fitted as an extra safeguard. Valve manufacturer RMC

recommends Dual Check Valve No N7150, as being suitable for this application.

An acceptable arrangement is shown in the diagram. Refer also to “Hot Water Delivery” on page 33 and to

“Mains Water Supply” on page 32. The plumbing arrangements for the solar hot and solar cold pipes are

shown on page 38.

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Rheem GAS BOOSTED SOLAR WATER HEATER Specifications Page 44