MCB CONTACTS / MCB ALARM CONTACTS / MCB AUX CONTACTS SHOWN WITH CIRCUIT BREAKER MANUALLY
SWITCHED TO THE ON CONDITION
WATER FLOW SWITCH CONTACTS SHOWN WITH WATER FLOW AT MAXIMUM RATE
ALL OTHER CONTACTS SHOWN IN DE-ENERGISED STATE BUT WITH REFRIGERATION CIRCUIT FULLY CHARGED
WHERE CONTACTS ARE MARKED (N/O) OR (N/C) ON CIRCUIT DIAGRAM ABOVE CONDITIONS APPLY
(1 STAGE)
DELAY TIMER (2)
(6 MINS)
(N/C) 96
OUT 1
STARTER OR
EXTERNAL
FLOW SWITCH
FAULT
LIGHT
MAINS
LIGHT
L1
L2
L3
N
95
(N/C) 96
95
(N/C) 96
FAN 1 MCB AUX
BLOCK:ALARM
TRIP = BREAK CONTACT
TB
FAN 1
THERMAL CUT OUT
FAN 2
THERMAL CUT OUT
TB
FAN 2 MCB AUX
BLOCK:ALARM
TRIP = BREAK CONTACT
(N/C) TB
(N/C) TB
SOFT STARTS
THERMAL
O/LOAD
& FAULT LIGHT
IF FITTED
(COM) 1
RUN (N/O) 2
3 (N/C)
STANDBY
STANDBY
SWITCH
6 (COM)
1 (L)
(N) 2
(N/O) 4
(N/C) 5
DIGITAL STAT
9 (L)
(N) 8
SMART CLOCK
FEED TERMINALS
10
11
15 (COM)
18 (N/O)
16 (N/C)
A1
A2
COMPRESSOR 1
CONTACTOR
(COM) 7
A1A2
A
B
RELAY (R1)
15 (COM)
18 (N/O)
16 (N/C)
A1
A2
10
11
7
6
FRIDGE
CCT 1
FAULT
LIGHT
1
95
(N/C) 96
COMP 1 MCB AUX BLOCK
TRIP / OFF =
BREAK CONTACT
HP SWITCH
(COM) C
(N/O) H
L (N/C)
INTERLOCK TERMINALS
53
54 (N/C)
COMP 1 MCB AUX BLOCK
TRIP / OFF = BREAK CONTACT
(COM) C
(N/O) L
H (N/C)
LP SWITCH
1 (N/C)
4 (N/O)
15 (COM)
18 (N/O)
16 (N/C)
A1
A2
COMPRESSOR 2
CONTACTOR
A1
A2
FAULT
LIGHT
FRIDGE
CCT 2
2
95
COMP 2 MCB AUX BLOCK
TRIP / OFF =
BREAK CONTACT
(COM) C
(N/O) H
L (N/C)
53
54 (N/C)
COMP 2 MCB AUX BLOCK
TRIP / OFF = BREAK CONTACT
(COM) C
(N/O) L
H (N/C)
LP SWITCH
BREAKS TO 'H' ON
PRESSURE FALLING
3 (N/C)
6 (N/O)
(COM) 9
RELAY (R2)
A
B
(COM) 9
6 (N/O)
3 (N/C)
53 (AUX)
(N/O) 54
COMP 1
CONTACTOR
2 (N/C)
5 (N/O)
(COM) 8
1 (COM)
3 (N/O)
4 (N/C)
2 (N)
A1
A2
DELAY TIMER (5)
(3 SECS)
15 (COM)
(N/O) 18
(N/C) 16
RELAY (R3)
A
B
DEFROST STAT
FRIDGE CCT 1
MAKES 1 TO 3
ON TEMP FALLING
53 (AUX)
(N/O) 54
COMP 2
CONTACTOR
2 (N/C)
5 (N/O)
(COM) 8
1 (COM)
3 (N/O)
4 (N/C)
2 (N)
DEFROST STAT
FRIDGE CCT 2
MAKES 1 TO 3
ON TEMP FALLING
A1
A2
DELAY TIMER (6)
(3 SECS)
15 (COM)
(N/O) 18
(N/C) 16
RELAY (R4)
A
B
9 (COM)
(N/O) 6
(N/C) 3
9 (COM)
(N/O) 6
(N/C) 3
A1A2
DELAY TIMER (4)
(30 SECS)
15 (COM)
(N/O) 18
(N/C) 16
73 (AUX)
(N/O) 74
COMP 1
CONTACTOR
A1
A2
FAN 1 CONTACTOR
73 (AUX)
(N/O) 74
COMP 2
CONTACTOR
A1
A2
FAN 2 CONTACTOR
7 (COM)
(N/O) 4
(N/C) 1
7 (COM)
(N/O) 4
(N/C) 1
DEFROST
LIGHT
FRIDGE CCT 1 REVERSING VALVE
FRIDGE CCT 2 REVERSING VALVE
5
1
3
(N/C) 2
(N/C) 4
(N/C) 6
12
(N/C)
L1
L2
L3
CONTROL CIRCUIT BREAKER
TRIP / OFF = BREAK CONTACT
(COM) 11
(N/O) 14
MAKES 4 TO 6
ON TEMP FALLING
PHASE ROTATION
RELAY
DELAY TIMER (3)
(7 MINS)
7 (COM)
(N/O) 4
(N/C) 1
(N/C)
WATER FLOW SWITCH
BREAKS ON WATER
FLOW RATE FALLING
RELAY (R5)
A
B
FLOW OK LIGHT
(N/C)
(N/C)
COMPRESSOR 2
MOTOR PROTECTOR
COMPRESSOR 1
MOTOR PROTECTOR
CONTROL
2.5A
MCB SETTINGS
COMPRESSORS FANS
1.1A
19.8A
FRIDGE CIRCUIT 2 FRIDGE CIRCUIT 1
SENSOR
1
3
5
(N/C) 2
(N/C) 4
(N/C) 6
FAN
1
DELAY TIMER (1)
(12 HOURS)
1
3
5
(N/O) 2
(N/O) 4
(N/O) 6
FAN 1 CONTACTOR
1
3
5
(N/C) 2
(N/C) 4
(N/C) 6
FAN
2
1
3
5
(N/O) 2
(N/O) 4
(N/O) 6
FAN 2 CONTACTOR
1
3
5
(N/C) 2
(N/C) 4
(N/C) 6
COMP
1
1
3
5
COMPRESSOR 1 CONTACTOR
21 (AUX)
COMPRESSOR 1 HEATER
1
3
5
(N/C) 2
(N/C) 4
(N/C) 6
COMP
2
COMPRESSOR 2 CIRCUIT BREAKER
TRIP / OFF = BREAK CONTACT
1
3
5
(N/O) 2
(N/O) 4
(N/O) 6
COMPRESSOR 2 CONTACTOR
21 (AUX)
(N/C) 22
COMPRESSOR 2 HEATER
L1
L2
L3
L1
L2
L3
83 (AUX)
(N/O) 2
(N/O) 4
(N/O) 6
(N/C) 22
(N/O) 84
FRIDGE CCT 2 VALVE COIL
(LIQUID LINE SHUT OFF)
83 (AUX)
(N/O) 84
SOFT
STARTS
IF FITTED
INTERLOCK
TERMINALS
HP SWITCH
BREAKS TO 'L' ON
PRESSURE RISING
BREAKS TO 'H' ON
PRESSURE FALLING
BREAKS TO 'L' ON
PRESSURE RISING
12
13
FRIDGE CCT 1 VALVE COIL
(LIQUID LINE SHUT OFF)
COMPRESSOR 1 CIRCUIT BREAKER
TRIP / OFF = BREAK CONTACT
FAN 2 CIRCUIT BREAKER
TRIP / OFF = BREAK CONTACT
FAN 1 CIRCUIT BREAKER
TRIP / OFF = BREAK CONTACT
Pro-Pac 90BMY THREE PHASE (400V 3 N~ 50Hz)
25
SD566252 ISSUE 51
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