Rheem GAS BOOSTED SOLAR WATER HEATER Service Manual download pdf (Page 7)

ABOUT YOUR WATER HEATER

PIPE WORK AND INSULATION

The solar hot and solar cold pipes between the solar storage tank and the solar collectors MUST BE of

copper.

The full length of the solar hot and solar cold pipes MUST BE insulated. The insulation must:

be of a closed cell type or equivalent, suitable for a solar water heating application and capable of

withstanding the temperatures of the fluid generated by the solar collectors under stagnation conditions

be at least 13 mm thick, however thicker insulation may be required to comply with the requirements of

AS/NZS 3500.4

be weatherproof and UV resistant if exposed

extend through any penetrations in the eaves, ceiling and roof

cover valves and fittings in the solar hot and solar cold pipe work

be fitted up to and cover the connections on both the solar storage tank and the solar collectors.

The insulation will offer corrosion protection to a metal roof against water runoff over the copper pipe, assist

in avoiding accidental contact with the solar pipe work as high temperature closed circuit fluid can flow from

the solar collectors to the solar storage tank and also reduce pipe heat losses.

There must be a continuous fall in the pipe work from the solar collector to the solar storage tank. The

continuous fall is essential to assist in the drain back function of the solar system.

Plastic pipe MUST NOT be used, as it will not withstand the temperature of the closed circuit fluid generated

by the solar collector under certain conditions (refer to Warning on page 31).

FREEZE PROTECTION

Solar Circuit

The solar circuit must be installed with a continuous fall of a minimum 5° (1 in 10 grade) in the pipe work

from the solar collector to the solar storage tank, with the full length of the solar hot and solar cold pipes

insulated and the system charged with correctly mixed closed circuit fluid to offer protection against freeze

damage. The system has NO WARRANTY for freeze damage if there is not a continuous fall in the solar hot

and solar cold pipes, or they are not insulated in accordance with the installation instructions, or the closed

circuit fluid has been incorrectly mixed (refer to “Terms of the Rheem Warranty” on page 63 and to “Pipe

Work and Insulation” on page 7).

The anti freeze control of the solar circuit is designed so there is no closed circuit fluid in the solar collector or

solar cold and solar hot pipes when the pump is off.

Gas Booster Water Heater

The gas booster has a frost protection system. The frost protection system will protect the gas booster from

damage, by preventing ice forming in the waterways of the gas booster, in the event of freezing conditions

occurring.

Notes:

The gas booster frost protection system will be rendered inoperable if electrical power is not available at

the water heater. Damage caused by freezing due to the unavailability of power at the water heater is

not covered by the Rheem warranty (refer to “Terms of the Rheem Warranty” on page 63).

If it is necessary to switch the power off to the water heater and there is a risk of freezing, then it is

necessary to drain the gas booster (refer to “Draining the Gas Booster Water Heater” on page 9).

Pipe work to and from the water heater must be adequately insulated to prevent freezing.

The water heater is not suitable for installation in areas where the ambient temperature falls below -20°C

(including wind chill factor).

Refer to “Terms of the Rheem Warranty” on page 63.

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Rheem GAS BOOSTED SOLAR WATER HEATER Service Manual Page 7

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