4 Assembly and connection
RITTAL cooling unit assembly and operating instructions 21
EN
Fig. 33: Electrical wiring plan no. 13
Legend
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
F2 PSA
H
pressure-operated switch
(3302.1x0 has bridge instead of pressostat)
F3 Bimetal contact compressor
F11/F12 Miniature fuses, condensate evaporator
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 terminal strip
X2 Master-slave connection
X3 Optional interface
Tab. 2: Contact data
SK 3332.540/.640
RS T
1
4
F4
Power
2413
S1
K1
4
1
23
21
F5
L1
PE
1
23
4
5
32 1
2
PE
6
M1
1
2
3
M2
1
2
3
M4
1
2
3
NTC I red
Serial
B1
B2
P
V
U
W
22
21
X3
8
3
NTC E blue
NTC C white
NTC A yellow
Level green
Te r m
B3
B4
B5
T1
Kx
K2
MS1
X1
L2 L3
S1
X2
A2
2
2
2
2
2
4
A1
F3
1
2
34
F2
F2
M1
M2
3~
M
M4
3~
M
F11
F12
E1
Mains
Note:
For technical data refer to the rating plate.
AC
cos f = 1
DC
L/R = 20 ms
I max. = 2 A
U max. = 250 V
I min. = 100 mA
U max. = 200 V
U min. = 18 V
I max. = 2 A
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