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PR0-PAC SYSTEM OWNER INSTALLATION MANUAL
PP(T)45BHC THREE PHASE (400V 3N~ 50Hz)
COMP CIRCUIT BREAKER
TRIP / OFF = BREAK CONTACT
5
3
1
DELAY TIMER T1 (12 HOUR)
A1
A2
18 (N/O)
(COM) 15
16 (N/C)
DEFROST STAT
H (N/O)
(N/C) L
(BREAKS TO
'H' ON TEMP
(COM) C
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)
FAN THERMAL CUT OUT
COMPRESSOR MOTOR PROTECTOR
FAN MCB AUX BLK : ALARM
TRIP = BREAK CONTACT
COMPRESSOR MCB AUX BLK : ALARM
TRIP = BREAK CONTACT
CONTROL CIRCUIT
BREAKER
TRIP / OFF = BREAK CONTACT
6 (N/C)
5
4 (N/C)
3
2 (N/C)
1
L3 L2 L1
18
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CONTACTOR
6 (N/C)
5
4 (N/C)
3
2 (N/C)
1
21
63
RELAY (R2)
A
B
(N/O)
(N/O) 4
7 (COM)
A1
DELAY TIMER T2
DEFROST
(6 MINS)
LIGHT
FAN CIRCUIT BREAKER
CONTACTOR
TRIP / OFF = BREAK CONTACT
5
6 (N/C)
5
3
3
4 (N/C)
1
2 (N/C)
1
A1
B
RELAY
(R1)
A
HEAT LIGHT
(N/C) L
CHILL LIMIT SWITCH
C (COM)
(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
STANDBY
[RUN] (N/O) 2
1 (COM)
SWITCH
(N/O) 4
[STANDBY] (N/C) 3
(COM) 7
(N/O)
1 (N/C)
WATER FLOW
A
B
SWITCH
RELAY (R3)
(N/C) L
H (N/O)
C (COM)
(N/O) L
H (N/C)
C (COM)
TB
NC
TB
(N/C)
96 (N/C)
95
43 (N/C)
44
L3
12 (N/C)
L2
11 (COM)
L1
PHASE ROTATION RELAY
CONTROL
6 (N/O)
(W)
4 (N/O)
(V)
COMPRESSOR
MCB CONTACTS / MCB ALARM CONTACTS / MCB AUX CONTACTS
2 (N/O)
(U)
SHOWN WITH CIRCUIT BREAKER MANUALLY SWITCHED TO THE ON
CONDITION.
22 (N/C)
WATER FLOW SWITCH CONTACTS SHOWN WITH WATER FLOW AT
HEATER
MAXIMUM RATE.
64 (N/0)
ALL OTHER CONTACTS SHOWN IN DE-ENERGISED STATE BUT WITH
LIQUID LINE SHUT OFF VALVE
REFRIGERATION CIRCUIT FULLY CHARGED.
WHERE CONTACTS ARE MARKED (N/O) OR (N/C) ON CIRCUIT
DIAGRAM ABOVE CONDITIONS APPLY
A2
6 (N/O)
4 (N/O)
FAN
2 (N/O)
A2
CHILL LIGHT
REVERSING
VALVE
CHILL
LIMIT
H (N/O)
LIGHT
10
SENSOR
OUT 2
11
FLOW OK LIGHT
FAULT
LIGHT
MAINS LIGHT
MCB SETTINGS
COMPRESSOR
FAN
28.4A
1.1A
2A
SD566250 ISSUE 35
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