Electric Connection; Connection To Water System - Zanotti DBO-Serie Gebrauchs- Und Wartungshandbuch

7.1 Electric connection

Connect the unit after checking the panel components.
When choosing the protective device take the following into consideration: should the
current
at installation point be higher than 10 KA, install a limiting device which reduces its peak value to 17 KA.
Prospective short-circuit current (Ik)
provided that no protective device against overcurrent has been installed on the circuit.
Peak value:
max value of prospective short-circuit current
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.
If a cold room includes more units, each unit shall be provided with its own safety device.
Connect the unit paying attention to the colours of the supply cable wires:
a) 230V/1/50-60Hz
b) 230V/3/50-60Hz
c) 400/3/50 Hz
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 19 and 20 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

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.
: current which would flow in case of failure due to negligible impedance,
3 wires Blue = Neutral
Yellow/Green = Ground
Brown = Phase
4 wires Blue = Phase
Yellow/Green = Ground
Brown = Phase
Black = Phase
5 wires Blue = Neutral
Yellow/Green = Ground
Brown = Phase
Black = Phase
Black = Phase
water condenser
( )
prospective short-circuit
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