McQuay WGS130AA: WGS140AW, Operating Manual

Page: 8 / 98

8 WGS 130A to 190A OM WGS-5
Wiring Diagrams
Figure 1, WGS 130AW – 190AW Field Wiring Diagram (Optional Single Point Connection)
DWG. 330588201 REV. 0B
TO COMPRESSOR(S)
DISCONNECT
(BY OTHERS)
3 PHASE
POWER
SUPPLY
GND LUG
UNIT MAIN
TERMINAL BLOCK
FUSED CONTROL
CIRCUIT TRANSFORMER
120 VAC
NOTE: ALL FIELD WIRING TO BE
INSTALLED AS NEC CLASS 1
WIRING SYSTEM WITH CONDUCTOR
RATED 600 VOLTS
TB1
(115 VAC)
TB1-2
1
82
2
EVAP. PUMP RELAY #1
(BY OTHERS)
120 VAC 1.0 AMP MAX
N
120 VAC
81
75
24 VAC
ALARM BELL RELAY
FACTORY SUPPLIED ALARM
FIELD WIRED
ALARM BELL
OPTION
TB1
(24 VAC OR 30 VDC)
72
IF REMOTE STOP CONTROL
IS USED, REMOVE LEAD 897
FROM TERM. 40 TO 53.
897
60
66
AUTO
ON
OFF
MANUAL
60
68
AUTO
ON
OFF
MANUAL
REMOTE STOP
SWITCH
(BY OTHERS)
ICE MODE
SWITCH
(BY OTHERS)
TIME
CLOCK
71
4-20MA FOR
EVAP. WATER RESET
(BY OTHERS)
4-20MA FOR
DEMAND LIMIT
(BY OTHERS)
-
-
GND
FU4 FU5
FU7
CHWR
ABR
85
2
EVAP. PUMP RELAY #2
(BY OTHERS)
120 VAC 1.0 AMP MAX
N
120 VAC
CHWR
86
2
COND. PUMP RELAY #1
(BY OTHERS)
120 VAC 1.0 AMP MAX
N
120 VAC
CWR
87
2
N
120 VAC
CWR
88
2
TOWER FAN #1
(BY OTHERS)
120 VAC 1.0 AMP MAX
N
120 VAC
M11
89
2
N
120 VAC
M12
78
77
N
80
79
0-10VDC
COND. PUMP RELAY #2
(BY OTHERS)
120 VAC 1.0 AMP MAX
TOWER FAN #2
(BY OTHERS)
120 VAC 1.0 AMP MAX
(BY OTHERS)
60
76
NOR. OPEN PUMP AUX.
CONTACTS (OPTIONAL)
COND. FLOW
SWITCH
(BY OTHERS)
60
67
NOR. OPEN PUMP AUX.
CONTACTS (OPTIONAL)
EVAP. FLOW
SWITCH
(BY OTHERS)
70
70
COOLING TOWER BYPASS
(BY OTHERS)
N
0-10VDC
+
+
2
ALARM BELL
RELAY
ALARM BELL OPTION
BELL
1 2
COM NO
*MANDATORY IF FACTORY FLOW SWITCH OPTION IS NOT SELECTED
*MANDATORY IF FACTORY FLOW SWITCH OPTION IS NOT SELECTED