McQuay WSC Operating Manual page 11

Figure 2, Field Wiring Diagram
* COOLING
TOWER
FOURTH
STAGE
STARTER
* COOLING
TOWER
THIRD
STAGE
STARTER
* COOLING
TOWER
SECONDH
STAGE
STARTER
* COOLING
TOWER
FIRST
STAGE
STARTER
COOLING TOWER
COOLING TOWER VFD
COMPRESSOR
NOTE: See notes on previous page.
OM Centrif Micro ΙΙ-5
MICROTECH CONTROL
BOX TERMINALS
(115V) (24V)
PE
GND
85
POWER
* NOTE 7
86
NEUTRAL
* NOTE 10
70
80
H
55
O
C4
74
A
86
86
* NOTE 10
79
H
O
C3
73
A
78
77
* NOTE 10
76
H
O
C2
75
A
* NOTE 10
H
O
T3-S
C1
A
EF
CF
81
COMMON
82(NO)
83(NC)
84
POWER
52
71
BYPASS VALVE
1-10 VDC
71
1-10 VDC
53
MICROTECH
COMPRESSOR CONTROL
L1 L2 L3
BOX TERMINALS
CTB1
NOTE 2
115 VAC
GND
CP1
CP2
23(5A)
24(5)
MOTOR
25
STARTER
(NOTE 1)
1
2
3
4
6
11
12
22
-LOAD-
LESS
NOTE 2
THAN
30V
OR
24VAC
54
ALARM RELAY
A
(NOTE 4)
STARTER LOAD SIDE TERMINBALS
VFD
U V
T1 T6 T2 T4
PE COMPRESSOR TERMINALS
L1
STARTER LOAD SIDE TERMINBALS
WYE-DELTA
L2
23 T1 T2 T3
24
25
T1 T2 T3
COMPRESSOR TERMINALS
1
STARTER LOAD SIDE TERMINBALS
SOLID STATE
2
T1 T2
3
4
11 T1 T6 T2 T4
COMPRESSOR TERMINALS
11
12
STARTER LOAD SIDE TERMINBALS
MEDIUM AND HIGH VOLTAGE
22
T1 T2
T1 T2
COMPRESSOR TERMINALS
H
O
A C
EP2
H
O
A C
EP1
H
O
A
C
CP2
H
O
A
C
CP1
- FOR DC VOLTAGE AND 4-20 MA
CONNECTIONS (SEE NOTE 3)
W
- FOR DETAILS OF CONTROL REFER
TO UNIT CONTROL SCHEMATIC
T3 T5
330342101
- COMPRESSOR CONTROL
SCHEMATIC 330342201
T4 T5 T6
- LEGEND: 330343001
T4 T5 T6
* FIELD SUPPLIED ITEM
NOTE 12
T3
T3 T5
T3
T3
330387901-0A
11