NOTE:
1. Refer to next page for legend, notes & wiring diagram for optional items.
2. Refer to unit control box (inside panel) for exact wiring diagram.
19
SCHEMATIC WIRING DIAGRAM
POWER SUPPLY : 460-3-60 (Four compressor units)
APPLICABLE ON MODELS: CNXM20 - CNXM60
JP7
AHU MOTOR ON/OFF CONTROL
(230Vac)
20
R15(DIG OUT)
R16(DIG OUT)
R17(DIG OUT)
R18(DIG OUT)
SSPS4
1
1A
UVM
SSPS2
SSPS3
SSPS1
100C
C.HTR4
100D
C.HTR3
100B
TO HVTB
TO HVTB
1B
S1
1A
5
3
L1
230V
C.HTR1
100A
6
ATB
2
L3
TRANS2
460V
4
OLR1-1A
AO4
HPS1
71A
A17 (S. FAN MOTOR FAULT)
A15 (COOLING STAGE 2)
A14 (COOLING STAGE 1)
AC (DIGITAL COM)
A20 (AUX. ALARM COMP2)
A19 (AUX. ALARM COMP1)
YR2-1A
YR1-1A
A16
52
A18
71B
A12 (EXTERNAL ENABLE)
A11 (FLOW SWITCH)
A13 (EMERGENCY)
OLR2-1A
HPS2
P
10B
67
JP6
9B
A9 (HPS-2)
A10
8B
JP5B
SSPS2
P
10A
A6 (SSPS-2)
64B
23B
(CB2A-1)
JP4B
A7 (CB-2)
A8 (OL-2)
9A
A5 (FCB-1)
A4 (HPS-1)
AO1
AO2
AO3
Ø
L3
(REMOVE JP1)
L3
8
1
Ø
Ø
Ø
L2
Ø
L1
L1
L2
ATB
24V AC
8A
JP5A
SSPS1
A1 (SSPS-1)
JP4A
(CB1A-1)
64A
23A
A2 (CB-1)
A3 (OL-1)
JP1
(UVM-1)
1
15
TO ATB
PE
17
TO ATB
F3
F1
UVM-1
F4
F2
CC6A-1B
CC5A-1B
CC2A-1B
CC1A-1B
R1(DIG OUT)
R2(DIG OUT)
R3(DIG OUT)
R4(DIG OUT)
R5(DIG OUT)
R6(DIG OUT)
R7(DIG OUT)
R8(DIG OUT)
R9(DIG OUT)
R10(DIG OUT)
R11(DIG OUT)
R12(DIG OUT)
R13(DIG OUT)
R14(DIG OUT)
C.HTR2
UVM CONNECTION (OPTIONAL)
SH
29A
S1
SH
+
(A5-SP1)
SH
DISCHARGE PRESSURE TRANSDUCER
-
COMP1
+
SUCTION PRESSURE TRANSDUCER
+
17C
18C
17NO
SPT1
28A
18NO
(SHEET 1 OF 3)
CONNECTION (SYSTEM 2)
16NO
15NO
14NO
C
C
8C
(SHEET 1 OF 3)
10NO
13NO
12NO
11NO
CONNECTION (SYSTEM 1)
REFER FAN MOTOR CONTROL
COMMON FAULT INDICATION
(VOLT-FREE CONTACT)
8NC
9NO
8NO
4C
7C
6C
5C
3C
2C
COMP1 CONTACTOR
3B
4O
14B
7O
6O
15B
5O
PDS2
UL2
14A
3O
15A
2O
3A
PDS1
UL1
1 2
4
3
On/Off
S1
-
O2
-
33B
+
(A10-OP2)
SH
OIL PRESSURE TRANSDUCER
COMP2
+
OPT2
DPT2
31B
(A9-DP2)
32B
+
SH
SH
30B
D2
-
SH
DISCHARGE PRESSURE TRANSDUCER
+
COMP2
-
REFER FAN MOTOR CONTROL
COMP1
-
-
SH
SH
TIN
ST2
(A1-ST1)
T.OUT
SH
ST1
OPT1
SPT2
SH
28B
29B
SH
S2
-
(A8-SP2)
33A
32A
O1
-
+
(A7-OP1)
+
SUCTION PRESSURE TRANSDUCER
COMP2
-
OIL PRESSURE TRANSDUCER
COMP1
-
DPT1
30A
31A
D1
-
(A6-DP1)
+
COMP1 CONTACTOR
1O
1C
(SEE COMP. POWER & CONTROL CONNECTION, SHEET 1 0F 3)
(SEE COMP. POWER & CONTROL CONNECTION, SHEET 1 0F 3)
(50% UNLOADER SOLENOID)
(50% UNLOADER SOLENOID)
COMP2 PUMP DOWN SOLENOID
COMP2 CAPACITY UNLOADER SOLENOID
COMP1 PUMP DOWN SOLENOID
COMP1 CAPACITY UNLOADER SOLENOID
+
+
USER INTERFACE BOARD
COOLING 75%
TOUT=15°C TIN=28°C
GND
DIP
ON
*
SERIAL CABLE
*
ESC
SET
*
MENU
COM1