23
ATTENTION
Connection to the electric line shall be effected applying a suitable safety device (a
circuit breaker or a ground fault interrupter) selected by the installer on the basis of the
line involved and of the absorption indicated on the unit plate.
Connect the unit paying attention to the colours of the supply cable wires:
a) 230V/1/50-60Hz 3 wires Blue = Neutral
Yellow/Green = Ground
Brown = Phase
b) 230V/3/50-60Hz 4 wires Grey = Phase
Yellow/Green = Ground
Brown = Phase
Black = Phase
c) 400/3/50 Hz 5 wires Blue = Neutral
Yellow/Green = Ground
Brown = Phase
Grey = Phase
Black = Phase
We advise to install a microswitch (not supplied) on the cold room door which will: · switch on the light in
the cold room, stop compressor and evaporator fan · override the temperature alarm (for about one hour
after door closing) every time the door is opened. Should microdoor, cold room light, door heater be
necessary, carry out following connections:
Microdoor Remove the jumper between terminals of the electronic control box and connect the microdoor
cable according to the following condition: closed contact with closed door.
Cold room light Connect as shown in the wiring diagram. Cold room lamp features: 230 Volt and 100 Watt
max.
Door heater Connect as indicated by the plate on terminal board. Heater is indicated by "EP". Output
voltage: 230 Volt.
WARNING
Any defective electrical part should be replaced by trained personnel exclusively.
The electric connection should be effected by qualified personnel.
7.2 Connection to water system
(
water condenser
)
This connection is only necessary if the unit has a water-cooled condenser. It is effected
by following the indications of the tags positioned by the inlet and outlet pipes.
Connection pipes should never be smaller in diameter than those on the unit. A minimum
water pressure of 1 bar is required for correct operation of the unit.
8 Electric controls
8.1 Control panel
SET : SET POINT display: By pressing and releasing this key the set point is displayed.
SET POINT change: By pressing the key for 3s the set point value is displayed and the set point change
mode is entered: the SET led blinks. In order to change the value use the and keys.
Then, the new value can be stored either by pressing the “SET” key (the instrument restores temperature
display) or by waiting the programming exit timeout (15s).
UP : In the programming mode or in the “Function Menu” it browses the parameter codes or increases the
value of the variable displayed. Keep pressed for a faster change.
Manual defrost: by pressing it for 5s the defrost cycle will start
DOWN : In programming mode or in “Function Menu” it browses the parameter codes or decreases the
value of the variable displayed. Keep pressed for a faster change.
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