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INSTALLATION – SOLAR STORAGE TANK
HOT WATER DELIVERY
This water heater can deliver water at temperatures which can cause scalding.
It is necessary and we recommend that a temperature limiting device be fitted between the water heater and
the hot water outlets in any ablution area such as a bathroom or ensuite, to reduce the risk of scalding. The
installing plumber may have a legal obligation to ensure the installation of this water heater meets the delivery
water temperature requirements of AS/NZS 3500.4 so that scalding water temperatures are not delivered to a
bathroom, ensuite or other ablution area.
The temperature limiting device must be of a type suitable for use with a solar water heater and should have:
a specified 'minimum temperature differential' between the hot water inlet and the tempered water outlet
of no greater than 10°C, when used with a solar water heater and continuous flow water heater
a specified 'maximum permitted pressure variation' in either supply between the hot water inlet and the
cold water inlet of no less than 15% when used with a continuous flow water heater.
Refer to the specifications of the temperature limiting device.
Where a temperature limiting device is installed adjacent to the closed circuit solar water heater, the cold water
line to the temperature limiting device can be branched off the cold water line either before or after the isolation
valve, pressure limiting valve and non-return valve to the solar storage tank. If an expansion control valve is
required, it must always be installed after the non-return valve and be the last valve prior to the solar storage
tank.
If a pressure limiting valve is installed on the cold water line to the solar storage tank and the cold water line
to a temperature limiting device branches off before this valve or from another cold water line in the premises,
then a pressure limiting valve of an equal pressure setting may be required prior to the temperature limiting
device.
Two Temperature Zones – In-series Gas Booster Mounted on Storage Tank
Two Temperature Zones – In-series Gas Booster Remote of Storage Tank
LEGEND
LEGEND
26
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