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ABOUT YOUR WATER HEATER
TIMER CONTROL
A timer can be installed in the electrical circuit to the water heater. The timer must be weatherproof if it is
installed outdoors.
It may be desirable for the water heater not to operate between certain hours, such as during the peak
period when connected to a Time of Use electricity supply due to a more expensive tariff rate applying.
A timer will affect the operating times of both the heat pump circuit and the booster heating unit.
Note: The 554 325 model water heater is recommended for connection to a minimum 16 hour per day power
supply. The 554 410 model water heater is recommended for connection to a 24 hour per day power supply.
TO TURN OFF THE WATER HEATER
If you plan to be away from home for only a few nights, we suggest you leave the water heater switched on.
If it is necessary to turn off the water heater:
Switch off the electrical supply at the isolating switch to the water heater.
Close the cold water isolation valve at the inlet to the water heater.
TO TURN ON THE WATER HEATER
Open the cold water isolation valve fully on the cold water line to the water heater.
Switch on the electrical supply at the isolating switch to the water heater.
Note: When power is turned on or reconnected to the water heater, the red LED will emit a solid glow for
three (3) seconds and then extinguish. This is normal operation and does not indicate a fault. The LED
display will then return to the current operational status.
The water heater may take up to forty five minutes to commence operating when the power supply is
switched on. The heat pump will only operate when power is available at the water heater, the water in the
storage tank requires heating, the heat pump compressor is cool and the ambient air temperature is within
the heat pump‟s operating temperature range of between a minimum of 3°C to 5°C and a maximum of 45°C
to 55°C. If the ambient temperature is outside of this range, the water heater will commence heating with the
booster heating unit.
When the heat pump is operating, the system will switch to the booster heating unit if the detected ambient
air temperature is outside the operating temperature range of between a minimum of 3°C to 5°C and a
maximum of 45°C to 55°C.
The system will not switch back to heat pump operation from the booster heating unit if the detected ambient
air temperature has moved back within the heat pump‟s operating temperature range. The heating cycle will
be completed by the booster heating unit.
Note: The heat pump may not turn on immediately after either having just completed a heating cycle and
more hot water is drawn from the water heater or power is shut down to the compressor, either during or at
the end of a heating cycle. The heat pump will wait until the compressor has cooled down and the conditions
for start up are favourable in order to protect the compressor from damage. This will be a minimum of forty
five (45) minutes and may take up to ninety (90) minutes from the last heating cycle.
GOING ON HOLIDAYS
If you plan to be away from home for a few nights, we suggest you leave the water heater switched on. If you
plan to be away for a longer period, conserve energy by switching off the isolating switch to the water heater
(refer to
"To Turn Off The Water Heater"
on page 8).
8
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