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INSTALLATION
25
Off-Peak or Time Controlled Electricity Supply
A single or twin element electric water heater connected to an Off-Peak
electricity supply should not be installed as part of a circulated hot water flow
and return system in a building. The benefits of the Off-Peak electricity supply
will be significantly reduced.
If a circulated flow and return system is required, it is necessary to install a
secondary water heater in the circulated flow and return system and supplied
from the Off-Peak electric water heater. The flow and return lines connect to
the secondary water heater, not the Off-Peak electric water heater. The
secondary water heater makes up for the pipe heat loss in the flow and return
system and must be able to provide a hot water outlet temperature of at least
60°C.
Note: The thermostat or preset outlet temperature of the secondary water
heater must always be set to at least 60°C.
Refer to the Circulated Hot Water Flow and Return – Off-Peak Electric Water
Heater diagram on page 25.
LEGEND
Circulated Hot Water Flow and Return
Off-Peak Electric Water Heater
REDUCING HEAT LOSSES
The cold water line to and the hot water line from the water heater must be
insulated in accordance with the requirements of AS/NZS 3500.4. The
insulation must be weatherproof and UV resistant if exposed.
991050
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