Specifications

INSTALLATION
23
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.
In addition, a temperature limiting device capable of receiving a hot water supply temperature of up to 99°C
should be used in conjunction with a Rheem solar thermosiphon system. Refer to the specifications of the
temperature limiting device.
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 to a direct
52L /RL series system. The cold water line to the temperature limiting device can be branched off the cold
water line either before or after the non return valve to the indirect 52H / RLX series system.
If a combination isolation valve and non return valve (duo or trio valve) is installed on the cold water line to
the solar water heater and the cold water line to the temperature limiting device branches off after this valve,
then a second non return valve must be installed between the cold water branch and the solar storage tank
of a direct 52L / RL series system.
Warning: A non return valve MUST BE installed on the cold water line to the direct 52L / RL series
system solar storage tank AFTER the cold water branch to a temperature limiting device.
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.
LEGEND
Two Temperature Zones Using a Temperature Limiting Device – Direct Solar Water Heater
LEGEND
Two Temperature Zones Using a Temperature Limiting Device – Indirect Solar Water Heater