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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).
Connect a 6 mm diameter clear plastic hose to the spigot of the air bleed
valve, located on the heat pump flow line at the connection to the storage
tank.
Let the other end of the hose go away from the work area where discharge
will not cause a nuisance.
Open the air bleed valve, using a 13 mm (½") spanner.
Air will be purged from the heat pump circuit as the water heater fills with
water.
Open the cold water isolation valve fully to the water heater.
Air will be forced out of the taps.
Close the air bleed valve when the air has been purged and water flows
freely from the hose.
Remove the hose from the spigot of the air bleed valve.
Close each tap as water flows freely from it.
Check the pipe work, inlet and outlet connections 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.
The heat pump may take up to one minute to commence operating when the
power supply is switched on. The heat pump will only operate when the water
in the storage tank requires heating, the heat pump compressor is cool and
power is available at the water heater.
Once the heat pump is operating, the system may switch to the booster heating
unit, after three minutes of operation, instead of the heat pump if it detects the
ambient air temperature is outside the heat pump‟s operating range of between
a minimum of 3°C to 5 C and maximum of 45 C to 55°C.
COMMISSIONING
32
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