INSTALLATION – SOLAR STORAGE TANK
22
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 used with a solar water heater should have a specified
„minimum
temperature differential
‟ between the hot water inlet and the tempered water outlet of no greater than 10°C.
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.
LEGEND
Two Temperature Zones Using Temperature Limiting Device
