Owner’s Manual – Solar Water Heaters
25
H3165 029664 Rev. B
Non-Continuous Operation
Power Failure or Disconnection:
WARNING:
Do not turn off the power
supply to the solar controller. The solar
controller is designed to be continuously
powered.
If the temperature of the water in the
solar collectors approaches zero, the
solar controller will turn on the pump for a
short period to feed warm water into the
collectors.
This function is provided to reduce the
chance of water freezing in the collectors
and causing damage.
If the power supply is interrupted, the solar
controller will be unable to pump warm water
into the solar collectors.
If the ambient temperature drops below
5°C, it is possible that the water in the
solar collectors will freeze and damage the
collectors or pipework.
If the power supply fails or the circuit to the
solar controller has to be turned off, and the
ambient temperature is expected to drop
below 5°C, the solar collectors and pipework
should be drained as described on page 21.
Not Using Hot Water?
WARNING:
If the water heater is not
used for two weeks or more, a quantity of
hydrogen (which is highly flammable) may
accumulate inside the water heater tank.
To dissipate this gas safely it is
recommended that a hot tap be turned on
for several minutes at a sink, basin or bath,
but not a dishwasher, clothes washer or
other appliance.
During this procedure there must be no
smoking, open flame or any other electrical
appliance operating nearby. If hydrogen is
discharged through the tap it will probably
make a sound similar to air escaping.
