Typical acoa wiring diagram, Acoa series air-cooled central chillers page 29 – AEC ACOA Series Air-Cooled Central Chillers User Manual
Page 30
Typical ACOA Wiring Diagram
1HTR
2HTR
HTR
HTR
STEP 1
STEP 2
STEP 3
STEP 4
TRW
NC4
NC3
NO4
C4
CONTROL CIRCUIT 115/1/60
3PS-1
9
10
11
20
19
18 1PS-2
3PS-2
9PS-1 12
4PS-1
8CR
14
9CR
4PS-2
9PS-2 21
23
1
2
4
15
3PS-1
9PS-1
1TR-1
24
C1
C2
C3
NO3
NO2
NC1
NO1
NC2
10PS-1
11PS-1
11PS-2
11PS-3
10PS-2
10PS-3
CIRC 1
CIRC 2
CIRC 2
CIRC 2
CIRC 1
CIRC 1
COMP NO. 2 OIL HEATER
COMP NO. 1 CONTACTOR (1, 28)
COMP NO. 1 OIL FAIL
COMP NO. 1 LIQ LINE SOLENOID
COMP NO. 2 LIQ LINE SOLENOID
CONTACTOR-FAN 1
COMP NO. 1 OIL HEATER
COMP NO. 1 LOW PRESSURE
(CONTROL POWER)
(SEE NOTE 7)
4TR-2
3
1
COMP NO. 1 LOCKIN RELAY (6)
COMP NO. 2 LOCKIN RELAY (15, 37)
2
COMP NO. 1 UNLOAD SOLENOID
CONTACTOR-FAN 5
CONTACTOR-FAN 3
CONTACTOR-FAN 2
CONTACTOR-FAN 4
CONTACTOR-FAN 6
5
31
34
32
1SOL
8CR
2SOL
31
36
35
38
9CR
3SOL
9CR
3M
5M
7M
4M
42
41
45
40
44
46
6M
8M
39
43
8
1M1-1
2M1-1
5CR-2
4CR-2
2M1-2
1M1-2
48
TIMER
COMP NO. 1 5 MIN. ANTI-CYCLE
15
16
J15
4L1
4L3
15A
6
5
4
87
86
85
6FM
79 80 81
8M
6M
4FM
3L1
3L3
OPTION
15A
FUSE NO.
3
2
1
3M
5M
1FM
3FM
70
71 72
76 77 78
5FM
7M
4M
84
83
82
2FM
73
74 75
SEE BORDER
DGM. FOR
VAR. SPEED
FAN MOTORS
GND
SEE NOTE 5
SEE NOTES 2, 3 & 4
1TB
L3
L2
L1
200-230V/3/60
1MTR
COMPRESSOR MOTORS
1M1
*
FUSING
UNIT
13
SEE NOTE 8
T1
M1
T2
M2
S1
S2
S3
C
BLK
50
51
52
53
1TAS-1
MOTOR TEMP
SENSORS
J27
27
S2
1UVR
COMP
#1
22
SENSORS
MOTOR TEMP
1TAS-2
57
56
55
54
BLK
C
S3
S2
S1
M2 T2
M1
T1
SEE NOTE 8
#2
COMP
2UVR
S3
28
J28
8
8
COMP NO. 1 MOTOR TEMP
COMP NO. 2 MOTOR TEMP
POWER. MAXIMUM FUSE SIZE 15A.
CUSTOMER SUPPLIED 115VAC
101
102
5TB
CHILLER HEATER
CHR HTR
T'STAT
2M1
2MTR
2M2
1M2
1M2
4CR
58
4CR-1
COMP NO. 1 CONTACTOR
COMP NO. 1 START RELAY (10, 43)
COMP NO. 2 START RELAY (19, 46)
COMP NO. 2 CONTACTOR
59
5CR
2M2
J25
26
25
COMP NO. 2 5 MIN. ANTI-CYCLE
TIMER
COMP NO. 2 LOW PRESSURE
COMP NO. 2 OIL FAIL
COMP NO. 2 CONTACTOR (2, 33)
9PS-2
3PS-2
25
HTR
HTR
2M1
5CR-1
SEE
NOTE 9
24VAC
115VAC
2T
8
2
29
33
24H
24G
ISA
+6.2
4TAS
Typical schematic - See the drawings
provided with your ACOA chiller
98
99
J
J
8
99
ACOA Series Air-Cooled Central Chillers
Page 29