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INSTALLATION
HOT WATER DELIVERY
This water heater can deliver hot water at temperatures which on occasion could exceed 75°C and even reach
up to 95°C. These temperatures are sufficiently hot to cause severe scalding. Water at this temperature may
be plumbed to fixtures where water hotter than 50°C is allowed, such as the kitchen and laundry, after ensuring
all pipe work, fixtures and fittings are suitable for at least 95°C.
The installing plumber may have a legal obligation to ensure the installation of this water heater meets the
water temperature delivery requirements of the Plumbing Code of Australia so that heated water delivered to
fixtures and appliances used primarily for personal hygiene is at a temperature which is unlikely to scald.
It is necessary and we recommend that a temperature limiting device be fitted between the water heater and
the fixtures and appliances used primarily for personal hygiene such as in a bathroom, ensuite, public
amenities or other ablution areas, to reduce the risk of scalding.
The temperature limiting device must be of a type suitable for use with a solar water heater. Refer to the
manufacturer's specifications of the temperature limiting device.
If there is a separate higher temperature hot water line to a non-ablution area or if a tempering valve is not
required, then a primary temperature control valve can be installed to reduce the temperature after the water
heater if a 75°C or greater delivery temperature is considered by a consumer to be too high for their needs or
the plumbing materials used in the heated water system are not rated to carry 75°C or higher water
temperature.
For a closed circuit 52H series system, 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, non-return valve and pressure limiting valve to the solar storage tank.
For an open circuit 52L series system, 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 a non-return valve.
If a combination isolation valve and non-return valve (duo or trio valve) is installed on the cold water line to an
open circuit model 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 series system.
Warning: A non-return valve MUST BE installed on the cold water line to the direct 52L series system solar
storage tank AFTER the cold water branch to a temperature limiting device.
The expansion control valve 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 water heater 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 Using a Temperature Limiting Device – Direct Solar Water Heater
29
LEGEND
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