INSTALLATION
6
FREEZE PROTECTION
The water heater has a freeze protection system. The freeze protection system
will protect the water heater from damage, by preventing ice forming in the
waterways of the water heater, in the event of freezing conditions occurring.
If the water temperature at the heat pump heat exchanger falls below 3°C and
the heat pump is not operating, the system will operate the circulator
periodically. Water is circulated from the storage tank through the heat pump
circuit, to prevent freezing in the connecting pipe work and heat pump module.
During this freeze protection cycle, the circulator will operate for at least
thirty (30) seconds, deactivating when the water temperature increases above
5°C.
Warning: In areas where the ambient air temperature may fall below 4°C,
power must be available to the water heater at all times to prevent freezing in
the heat pump circuit.
The water heater has NO WARRANTY for freeze damage if power is
unavailable at the water heater.
MAINS WATER SUPPLY
Where the mains water supply pressure exceeds that shown in the table below,
an approved pressure limiting valve is required. Refer to the installation
instructions supplied with the storage tank for the position of the pressure
limiting valve.
A minimum water supply pressure of 200 kPa is required to enable the heat
pump circulator and heat pump system to operate effectively.
TANK WATER SUPPLY
If the water heater is supplied with water from a tank supply and a minimum
water supply pressure of 200 kPa at the water heater cannot be achieved, then
a pressure pump system must be installed to allow the heat pump circulator to
operate and avoid air locks in the circuit. Care must be taken to avoid air locks.
The cold water line from the supply tank should be adequately sized and fitted
with a full flow gate valve or ball valve.
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