8 maintenance
Kelvinator heat pump hot water system
5. Release the pressure inside the tank by lifting up the lever
on the pressure and temperature relief valve. Caution
should be taken so the lever does not snap back as it
could damage the valve seat. Once the lever is activated
water will be discharged from the relief valve drainage
pipe, relieving the pressure inside the storage tank.
outlet
relief valve
activation
lever
drainage
pipe
6. When water has stopped discharging from the relief valve
drainage pipe, this indicates that the pressure inside the
tank has now been reduced to atmospheric pressure.
De-activate the lever on the relief valve, returning it to its
normal position.
7. Drain the storage tank by undoing the connection to the
tank inlet and placing your drainage solution in position
as needed. Activate the relief valve lever, releasing the
vacuum and allowing air to flow into the tank as the water
drains out. Whilst the storage tank is draining, continually
monitor the process and most importantly where the
water is draining to. If at any time the draining needs to
be halted, simply de-activate the relief valve lever.
8. Once the storage tank has been fully drained, flush the
system by inserting a garden hose into the inlet of the
storage tank. Allow water to enter the inlet and drain
several times to ensure that all sediment is removed.
9. De-activate the relief valve, returning it to its normal
position.
10. Reconnect the inlet piping to the storage tank and then
turn on the isolation valve, located on the inlet piping to
allow mains water to refill the tank.
11. Turn on the nearest hot water tap to allow air to be
expelled from the system. Once water has begun to flow
freely from the tap for a period of time and all air has
been expelled from the system, close the hot water tap.
Maintaining your hot water system
Regularly inspect the air inlet and outlet of the heat pump.
Remove any foreign objects or blockages to allow the air to
flow freely.
Once the hot water system is in use, sediment can
accumulate in the system.
In order to maximise the life of the hot water system, it is
recommended that you flush the system every 5 years (more
frequently in poor water quality areas) according to the
below instructions:
Drainage or flushing of tank
To flush or drain the storage tank:
1. The power to the hot water system must be turned off at
the switchboard. Locate and turn off the circuit breaker
that supplies the hot water system.
2. The water inside the tank may be very hot. Turn on the
nearest hot water tap and allow it to run until the water
coming out has reached a safe temperature for draining.
3. Before draining the hot water system assess the best area
for the water to be directed (i.e. an outside drain) where
it will not damage property or cause an unsafe situation
to arise.
4. Turn off the mains water supply to the hot water system
using the isolation valve located on the inlet piping.
Maintenance