Foster Solo Plus, Sercie Manual

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41
ELECTRICAL CONNECTIONS
1.
Check that the mains supply to the SOLO corresponds to the rating stamped on the serial no.plate.Tolerance: +/- 10%
of the nominal value.
2. Connection should always be made from a fused isolator or a switch-disconnector with fuses. We advise also the
use of a circuit breaker fitted in the line.
3. If a door operated microswitch is fitted to the coldroom connect the door switch to the door switch cable which exits
at
the top of the condensing unit. When the door is opened the coldroom light (if fitted, see below) will switch on and
the
evaporator fans the compressor will stop.
If a door microswitch is not fitted leave the door switch wire connected together and secure the cable inside the
condensing unit housing.
Note: Microswitch operation is closed when the door is closed. No microswitch is supplied with the unit.
4. The light output may be switched on/off using the key light on the controller facia. If the controller is to be used to switch
on/off the coldroom light, the supply should be taken from the light cable which exits from the top of the evaporator
housing. If an independent light switch is used the light cable from the evaporator housing should not be used. This
cable must be insulated and secured inside the evaporator housing.
5. Range “L” units (Low Temperature) are also fitted with a cable for door heater connection. It exits from the top of
the
condensing unit. If the door frame heater is rated at 24V, a transformer must be connected to step down the supply
voltage.
It is recommended that an appropriate fuse according to the door heater is used. If the door frame heater cable is
not used it must be insulated and secured inside the condensing unit housing.
6. Proceed with connection noting the colours of the wires in the mains supply cable provided as follows:
A) Single-phase supply 230V/1~/50 Hz 3 wires Blue = Neutral
Green/Yellow = Earth
Brown = Phase
B) Three-phase supply 230V/3~/50 Hz 4 wires Blue = Phase
Green/Yellow = Earth
Brown = Phase
Black = Phase
A) Single-phase supply 400V/3~/50 Hz 5 wires Blue = Neutral
Green/Yellow = Earth
Brown = Phase
Black = Phase
Black = Phase
N.B: Do not connect light switch cable, door heater or room indicator lamp to 230 V mains supply line.
Plates on each cable show the relevant connection to be made.