Rheem Water Heater - Manual (Page 25)

INSTALLATION – SOLAR STORAGE TANK
25
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, i.e. between the hot water inlet and
the tempered water outlet, of no greater than 10°C.
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.
Two Temperature Zones Using Temperature Limiting Device