INSTALLATION – SOLAR STORAGE TANK
29
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.
Where a temperature limiting device is installed adjacent to the 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 and pressure
limiting valve to the solar storage tank, but it MUST BE
before the non return
valve. 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.
Warning: A non return valve MUST BE installed on the cold water line to
the solar storage tank AFTER
the cold water branch to a temperature limiting
device. Due to the higher water temperatures generated under certain
conditions in the solar collectors of this solar water heater, an additional
effective back-flow prevention device also should be used as an extra
safeguard. Valve manufacturer RMC recommends Dual Check Valve model
N7150, as being suitable for this application.
Two Temperature Zones Using a Temperature Limiting Device
