Calorex Pro-Pac Series Owners & Installation Manual page 19

COMP 2
CIRCUIT BREAKER
TRIP / OFF =
BREAK CONTACT
5 6 (N/C)
3 4 (N/C)
1 2 (N/C)
COMP 1
CIRCUIT BREAKER
TRIP / OFF = BREAK CONTACT
5 6 (N/C)
3 4 (N/C)
1 2 (N/C)
18 (N/O)
(COM) 15
16 (N/C)
A1 A2
DELAY TIMER T1 (12 HOUR)
A1 A2
18 (N/O)
(COM) 15
16 (N/C)
H (N/O)
(N/C) L
DEFROST STAT
(COM) C
(BREAKS TO 'H' ON
TEMP FALLING)
TEMP OK
LIGHT
SOFT START
THERMAL O/LOAD &
FAULT LAMP IF
FITTED
STARTER OR
EXTERNAL FLOW
SWITCH
LP SWITCH
(BREAKS TO 'H' ON
PRESSURE FALLING)
HP SWITCH
(BREAKS TO 'L' ON
PRESSURE RISING)
COMPRESSOR 2 MOTOR
PROTECTOR
COMPRESSOR 1 MOTOR
PROTECTOR
FAN MCB AUX BLK : ALARM
TRIP = BREAK CONTACT
COMPRESSOR 1
MCB AUX BLK : ALARM
TRIP = BREAK CONTACT
COMPRESSOR 2
MCB AUX BLK : ALARM
TRIP = BREAK CONTACT
CONTROL CIRCUIT
BREAKER
TRIP / OFF =
BREAK CONTACT
5 6 (N/C)
3 4 (N/C)
1 2 (N/C)
L3 L2 L1
SD566250 ISSUE 35
PP(T)70BHC THREE PHASE (400V 3N~ 50Hz)
CONTACTOR
(COMP 2)
5 6 (N/O) (W)
3 4 (N/O) (V)
1 2 (N/O) (U)
21 22 (N/C)
A1 A2
DELAY TIMER T3
CONTACTOR
(COMP 1)
(N/O)
10 (SECS)
5 6 (N/O) (W)
3 4 (N/O) (V)
1 2 (N/O) (U)
21 22 (N/C)
A1 A2
DELAY TIMER T2
(6 MINS)
RELAY (R2)
A1 A2
COMP 1 MCB AUX COMP 2 MCB AUX
(N/O) 11 14 (COM) 54 53 (N/O) 54
DEFROST LIGHT
FAN CIRCUIT BREAKER
TRIP / OFF =
CONTACTOR (FAN)
BREAK CONTACT
5 6 (N/C) 5 6 (N/O)
3 4 (N/C) 3 4 (N/O)
1 2 (N/C) 1 2 (N/O)
A1 A2
B
RELAY (R1)
A
HEAT LIGHT
(N/C) L H (N/O)
CHILL LIMIT
C (COM)
SWITCH
(BREAKS TO 'H' ON
TEMP FALLING)
DIGITAL STAT (2 STAGE)
MAKES 4 TO 6 ON TEMP FALLING
OUT 1
MAKES 8 TO 7 ON TEMP RISING
(N/C) L H (N/O)
C (COM)
(N/O) L H (N/C)
C (COM)
FAN THERMAL TK
(NC)
CUT OUT
TK
(N/C)
(N/C)
96 (N/C)
95
96 (N/C)
FAULT LIGHT
95
95 (N/C)
96
COMP 1 CONT AUX
63 64 (N/0)
L3
12 (N/C) COMP 2 CONT AUX
L2
63 64 (N/0)
L1 11 (COM)
PHASE ROTATION RELAY
COMP
2
COMP
MCB CONTACTS / MCB ALARM CONTACTS / MCB AUX CONTACTS
SHOWN WITH CIRCUIT BREAKER
1
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
53 (N/O)
FAN
CHILL LIGHT
REVERSING VALVE
CHILL LIMIT
LIGHT
10
SENSOR
OUT 2
11
STANDBY SWITCH
FLOW OK LIGHT
B
RELAY (R3)
A
WATER FLOW
SWITCH (N/O)
LIQUID LINE
SHUT OFF
VALVE
MAINS LIGHT NEUTRAL
MCB SETTINGS
CONTROL COMPRESSOR FAN
2.5A 23.8A 2.8A
19