Kelvinator heat pump hot water system
electrical connection 15
Electrical connection
Wiring the heat pump on a continuous power supply only:
If the heat pump is to be wired to a continuous power supply
only, the jumper leads supplied with the heat pump are to
be installed. The red jumper lead is to be wired between
terminals HL and L2. The black jumper lead is to be wired
between terminals HN and N2. This will provide power to
the compressor circuit of the heat pump and is shown in the
diagram below.
15
0m
m
Ø2
.5
m
m
active (red)
neutral (black)
earth green/yellow
continuous
supply input
storage tank
heater output
Wiring the heat pump with an off-peak power supply:
If the heat pump is to be wired with an off peak power supply,
there are a number of ways that this can be achieved. The off
peak power supply active wire is always to be wired to terminal
L2, however the off peak power supply cable could be a single
active wire, or have a neutral and an earth wire. The neutral
wire, if available, would be wired to terminal N2 however in the
case of the having a single active wire, the black jumper lead will
need to be installed between terminals HN and N2. These two
off peak wiring configurations are shown in the diagram.
Off peak wiring configuration 1.
active (red)
neutral (black)
earth green/yellow
continuous
supply input
storage tank
heater output
off peak
supply input
Off peak wiring configuration 2.
active (red)
neutral (black)
earth green/yellow
continuous
supply input
storage tank
heater output
off peak
supply input
If the heat pump is replacing an electric hot water system
that has an off peak power supply cable, another alternative
is running a single active cable for the continuous power
supply from the switchboard. In this case the black jumper
lead will also be installed between terminals HN and N2 and
the wiring configuration will look similar to the “off-peak wiring
configuration 1" in the diagram. Since the continuous power
supply would be using the off-peak supply cable’s neutral, it
must be capable of handling the current drawn by the 3.6kW
heating element. If in doubt, run a cable from the switchboard
with an adequately sized active and a neutral.
Note: The two operating modes of the heat pump, Automatic
mode and Electric heating manual mode will never operate at
the same time. Therefore if you are using a shared neutral for
the continuous and off peak power supplies, the maximum
current flowing through the neutral will be achieved when the
heat pump is in Electric heating manual mode and powering
the 3.6kW element in the storage tank.
