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4 Assembly and connection
SK 3332.540/.640
GB
Fig. 31: Electrical wiring plan no. 11
Key
A1
Power PCB
A2
Basic or Comfort controller
A3
Starter relay and RC element
B1
Temperature sensor, internal temperature
B2
Icing hazard temperature sensor
B3
Temperature sensor, external 1
B4
Temperature sensor, external 2
B5
Condensate warning sensor (optional)
C1 – C4 Running capacitors
E1
Condensate evaporator
H
F2
PSA
pressure-operated switch
(3302.1x0 has bridge instead of pressostat)
F3
Bimetal contact compressor
F11/F12 Miniature fuse
K1
Relay collective fault 1
K2
Relay collective fault 2
L1
LED operational green
L2
LED alarm red
M1
Compressor
M2
Condenser fan
M4
Evaporator fan
R1
Potentiometer for setting the temperature
S1
Door limit switch
(without door limit switch: terminal 1, 2 open)
T1
Transformer (optional)
X1
Main connection clamping strip
X2
Master/slave connection
X3
Optional interface
20
S1
Mains
PE
L1
L2
L3
PE
1
2
3
X1
6
F11 F12
E1
T1
3
2
1
1
2
R
S
T
K2
S1
Power
A1
M1
F3
F2
1 2 3
4
1 2 3 4
U
V
F2
P
W
M1
X2
X3
4
5
3
8
2
4
1
3
Serial
MS1
K1
NTC E blue
Kx
NTC C white
NTC A yellow
Level green
M2
F4
M4
F5
1 2 3
4
1 2 3
1 2 3
1
M
M
3~
3~
M4
M2
Note:
For technical data refer to rating plate.
AC
cos f = 1
I max. = 2 A
U max. = 250 V
Tab. 2: Contact data
A2
2
B1
NTC I red
2
B2
2
B3
2
B4
2
B5
4
Term
2
DC
L/R = 20 ms
I min. = 100 mA
U max. = 200 V
U min. = 18 V
I max. = 2 A
Rittal cooling unit assembly instructions
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