Version Nr. 1-1 - 05.03.2020
Doc. Nr. 9951650033
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10. Electrical connection
Danger from electrical voltage
The unit should only be connected by qualified electricians.
The personnel must ensure that the unit is disconnected form the
electrical supply for the duration of connection work and is protected
against unauthorised reconnection.
Note: Check that the available voltage, frequency and fuse rating are the same as those stated on the unit data
label.
Connection to the main electrical supply
The mains connection is made via a 5-core cable. To connect the unit to the mains proceed as follows:
Take the control cabinet out of operation in the prescribed manner.
See the connection details on the circuit diagram.
Note the connections of the 5-core cable from the following table.
Black
L
Phase
Blue
N
Neutral
Yellow / green
Earth protection
Brown
L1
Phase
Grey
N1
Neutral
Note: Connect the unit to the mains. Take the control cabinet back into operation in the prescribed manner.
Power consumption and start-up current are stated on the data label and under technical data.
Connecting the alarm and door contact interface
To avoid unnecessary run-time, the heat exchanger can be switched on and off through the door contact. There
is also an alarm contact that notifies about high cabinet temperature and about fan-failure.
The alarm/door contact interface is made via a 5-core cable. To connect the alarm/operation interface proceed
as follows:
Take the control cabinet out of operation in the prescribed manner
See the connection details on the circuit diagram.
Note the connections of the 5-core cable from the following table.
Brown
T1 Door contact 1
Grey
T2 Door contact 2
Pink
P1 Alarm high temperature NC
Red
P2 Alarm Common
Violet
P3 Alarm high temperature NO
Attention: The door contact (T1, T2) must be switched potential-free.
Attention: The current that will operate the alarm contact (P1, P2, P3)
must be less than 0,5 A / 24VAC or 0,5 A / 24VDC.
The temperature adjustment range for the alarm temperature is
between 40°C (left-hand stop) and 70°C (right-hand stop). The alarm
temperature is pre-set in our works at 60°C.
To change the setting for the alarm temperature:
Remove the MCB access plate on the front of the unit.
Using a screwdriver turn the adjustment wheel on the potentiometer “ALARM” slightly to the right
