Справочник Пользователя для Rheem GAS BOOSTED SOLAR WATER HEATER

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CIRCULATED HOT WATER FLOW AND RETURN SYSTEM 
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 bypass the solar water heater and 
install a secondary water heater connected to the hot water flow and return line and supplied from the 
solar water heater. The secondary water heater must be a storage water heater able to provide a hot 
water outlet temperature of at least 60

°C. Note: The thermostat must always be set to at least 60°C. 

Refer to the 

 
Temperature Limiting Device 
A temperature limiting device cannot be installed in circulated hot water flow and return pipe work. The 
tempered water supplied from the tempered hot water outlet on this water heater or from another 
temperature limiting device cannot be circulated. 
 
Where a circulated hot water flow and return system is required in a building, a temperature limiting 
device can only be installed on a dead leg, branching off the circulated hot water flow and return pipe or 
a dead leg installed from the tempered water outlet of this water heater. 
 
If circulated tempered water were to be returned back to the water heater, depending on the location of 
the return line connection on the water supply line to the water heater, then either: 

•  water will be supplied to the cold water inlet of the temperature limiting device at a temperature 

exceeding the maximum recommended water supply temperature, or 

•  when the hot taps are closed no water will be supplied to the cold water inlet of the temperature 

limiting device whilst hot water will continue to be supplied to the hot water inlet of the temperature 
limiting device. 

These conditions may result in either water at a temperature exceeding the requirements of 
AS/NZS 3500.4 being delivered to the hot water outlets in the ablution areas, or the device closing 
completely and not delivering water at all, or the device failing. Under either condition, the operation 
and performance of the device cannot be guaranteed.