ABOUT YOUR WATER HEATER
12
TO TURN OFF THE WATER HEATER
If it is necessary to turn off the water heater:
•
Switch off the electrical supply at the water heater isolating switch on the switchboard or at the isolating
switch at the water heater.
•
Close the cold water isolation valve at the inlet to the water heater.
Note:
If there is a risk of freezing conditions, the electrical supply to the water heater should not be switched
off, otherwise damage could result (refer to
on page 10).
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 water heater isolating switch on the switchboard and at the isolating
switch at the water heater.
•
Check and if required reset the timer function on the Display Panel.
Note:
When the electrical supply is switched on, there will be a knocking sound coming from the heat pump
for a short period of time. This is the electronic expansion valve operating. This is normal and not a fault with
the heat pump.
HEAT PUMP OPERATION
The heat pump may take up to 5 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, and
•
the water in the storage tank requires heating, and
•
the water temperature in the lower part of the water heater is 39°C or less.
If the ambient air temperature is below -5°C or above 43°C and the system calls for heating, the heat pump
will not operate, and the electric heating unit will operate instead.
When the heat pump is operating, the system may switch to the electric heating unit if it detects that the
ambient air temperature is below the minimum operating temperature of -5°C or above the maximum operating
temperature of 43°C. It may also switch back to heat pump operation from the electric heating unit if it detects
the ambient air temperature has moved back to within the heat pump’s operating temperature range.
Note:
The heat pump may not turn on after having just completed a heating cycle and more hot water is drawn
from the water heater, or whilst the heat pump was operating and either power was switched off or it was
turned “Off” at the Display Panel. The heat pump will wait at least 3 minutes before operating and the conditions
for start-up are favourable.
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, you can conserve energy by placing the water heater into Vacation
Mode at the Display Panel. The heat pump and electric heating unit are prevented from operating under
standard heating conditions. The electrical supply remains available to the water heater. Refer to
on page 24.
It is not advised to switch off the water heater at the isolating switch if there is the risk of freeze conditions.
Refer to
“To Turn Off The Water Heater”
on page 12.
