Technical data

28
COMMISSIONING
TO FILL AND TURN ON THE WATER HEATER
The power supply to the water heater must not be switched on until the
water heater is filled with water and a satisfactory megger reading is
obtained.
Open all of the hot water taps in the house (don‟t forget the shower).
Open the cold water isolation valve fully to the water heater.
Air will be forced out of the taps.
Close each tap as water flows freely from it.
Check the pipe work and the connection points for the flexible braided
hoses for leaks
Switch on the electrical supply at the isolating switch to the water heater.
Set the timer if one is installed.
Note: The water heater is preset in the factory to allow it to commence
operating with either the heat pump or booster heating unit immediately power
is turned on for the first time. If power is turned on and then off at its
installation, the water heater may take up to forty five (45) minutes to
commence operating when the power supply is switched on again.
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.