24 electrical installation
Kelvinator solar hot water systems
Electrical installation
If the solar hot water system is electric boosted, the storage
tank will have a heating element installed inside the tank. The
element is required to be installed with a 240 volt alternating
current continuous or off peak power supply. This heating
element is designed to be installed on extended off peak
which is available up to 18 hours of the day compared to the
standard off peak available only 8 hours. If the customer has
only standard off peak available, they should be advised to
call their electrical supplier and get it changed to extended
off peak. If the heater is connected to standard off peak and
not extended off peak power supply against manufacturers
recommendation, complaints from customers about
insufficient hot water being available will be considered an
installation fault and hence not covered under warranty. The
supply cable must be capable of handling the current draw of
the 3.6kW element and be protected by a suitably rated and
labelled circuit breaker. Where the cables are run externally,
they are to be installed in a conduit in order to provide
mechanical protection. The recommended size of the conduit
is 20mm and an entry has been provided for a 20mm conduit
adapter on the terminal box of the storage tank. If fixing the
conduit to the storage tank with saddles be sure to use screws
no longer than 13mm in length and if pre drilling of holes is
required, be very careful not to penetrate too far into the
storage tank.
For safety reasons it is recommended that the wiring of the
storage tank be completed first before the cable is wired to
the switchboard. If you are replacing an existing electric hot
water system and re-using the existing cable, ensure that the
power supply to this cable is isolated or disconnected at the
switchboard.
The 20mm conduit adapter is to be inserted into the 20mm
cut-out provided and the locking ring screwed down to hold
the conduit firmly in place. The earth wire is to be wired to the
earthing terminal on the bottom left hand side of the terminal
block. The active wire is to be wired to terminal “A1” and the
neutral wire to terminal “N” of the wiring terminal block.
be very careful
not to penetrate
too far into the
storage tank
earth terminal
earth
neutral terminal
wiring terminal block
element
thermostat
active terminal
conduit adaptor goes
in here and locking
ring holds it
Electrical testing of the solar hot water system
Once the hot water system has been wired correctly and
the storage tank filled with water, the following mandatory
tests are required to be completed as per the AS/NZS 3000
Australian Standards:
a) Continuity of the earthing system
b) Insulation resistance
c) Polarity
d) Correct circuit connections
e) Verification of impedance required for automatic
disconnection of supply
Note: The solar controller and gas continuous flow
water heater (if installed) are required to be electrically
disconnected during the insulation resistance testing to
prevent damage to their electronics.
Refer to the AS/NZS 3000 Australian Standard for specific
details on how to perform these tests and the acceptable
readings that must be obtained. If the electrical installation
fails a test, that test and any preceding tests that may have
been influenced by the fault indicated shall be repeated after
the fault has been rectified.
