Fläkt Woods
8643 GB 2012.11
3
We reserve the right to alter specifications
Installation and Maintenance Instructions
EQKA Cooling unit
Electric Connections
Check that the cooling unit has been switched off with
the main switch. The electric connections are wired on
the main switch.
The direction of rotation of the compressors depends on
the sequence of the phases. The cooling unit must be
wired with the correct phase sequence; otherwise an
alarm will be initiated. The alarm chain of the cooling
unit can also transmit a group alarm signal to an external
monitoring unit. (EQ air handling unit or another unit
across a monitoring unit).
This alarm group can be obtained as potential-free
contacts at pins 57 and 58 on wiring terminals.
To prevent unnecessary stops and alarm from the
cooling unit, it should be interlocked across the extract
air fan, FF.
Connect the cooling unit as illustrated in the wiring
diagram below.
Incoming
3x400V supply
To be connected
to main switch in
cooling unit.
L1
L2
L3
N
PE
PE
PE
N
QO1.6
QO1.4
QO1.2
Outgoing
group alarm
(closes on an alarm)
58 NO
57 C
2
1
2
PE
PE
1
2
3
PE
1
2
3
4
4
PE
1
PE
54
53
2
1
2
PE
PE
1
C
NC
PE
56
55
2
1
2
PE
PE
1
C
NO
52
51
2
1
2
0-10V
1
+
–
Interlock across possible
outdoor thermostat, GT
(otherwise fit with jumper)
Interlock across
extract air fan
0-10V DC control signal
External wiring diagram
