17
SCHEMATIC WIRING DIAGRAM
POWER SUPPLY : 460-3-60 (Dual compressor units)
APPLICABLE ON MODELS: CNX150 - CNXM10
NOTES
1. ANY WIRE REPLACEMENT SHOULD BE OF THE 90
0
C
OR ITS EQUIVALENT.
2. USE COPPER CONDUCTOR WIRES ONLY.
3. COMPRESSORS ARE PROVIDED WITH INTERNAL
LINE BREAK OR SSPS FOR THERMAL PROTECTION.
4. FUSED DISCONNECT SWITCH OR CIRCUIT
BREAKER TO BE PROVIDED BY END USER WITH
RATING AS RECOMMENDED BY ZAMIL.
5. USE DISCONNECT TAB OR SPLICE ONLY
WHERE- EVER REQUIRED FOR EXTENSION OF
ORIGINAL WIRE.
6. POWER MUST BE SUPPLIED TO CRANKCASE
HEATER FOR MINIMUM OF 12 HOURS PRIOR TO
SYSTEM START UP.
IF POWER IS OFF 6 HOURS OR MORE, CRANKCASE
HEATER MUST BE ON FOR 12 HOURS BEFORE
OPERATING THE SYSTEM.
FAILURE TO FOLLOW THESE INSTRUCTIONS MAY
RESULT IN COMPRESSOR DAMAGE.
+
LEGEND
AHU
AIR HANDLING UNIT
ATB
AUXILIARY TERMINAL BLOCK
BMR
BLOWER MOTOR RELAY
CC
COMPRESSOR CONTACTOR
CCA
AUXILIARY CONTACT
CB
CIRCUIT BREAKER
C. HTR CRANKCASE HEATER
COMP/C COMPRESSOR
F
FUSE
FM
FAN MOTOR (CONDENSER)
FMC
FAN MOTOR CONTACTOR
HPS
HIGH PRESSURE SWITCH
HVTB
HIGH VOLTAGE TERMINAL BLOCK
JP
JUMPER
L1
LINE 1
L2
LINE 2
L3
LINE 3
LUG
LUG GROUND
MB
MOTHER BOARD
OLR
OVER LOAD RELAY
SSPS
SOLID STATE PROTECTIVE SYSTEM
TRANS TRANSFORMER
TK/TOP FAN MOTOR (PROTECTION) THERMAL CONTACT
UL
COMPRESSOR UNLOADER SOLENOID
UVM
UNDER VOLTAGE MONITOR
YR
COOLING RELAY
FIELD WIRING
DISCONNECT TAB - 1/4"
SPLICE-CLOSED END
TERMINAL BLOCK OR TERMINATION POINT
JUNCTION OF WIRES
CROSSING OF WIRES, NO CONNECTION
EARTHING/GROUND
_ _ _
+
COMP2 PUMP DOWN SOLENOID
COMP2 CAPACITY UNLOADER SOLENOID
COMP1 PUMP DOWN SOLENOID
COMP1 CAPACITY UNLOADER SOLENOID
HOT GAS BY-PASS SOLENOID
(OPTIONAL)
(OPTIONAL)
(OPTIONAL)
COMP2 CONTACTOR
(OPTIONAL)
(OPTIONAL)
ATB
STG2 COOLING
OLR2-1A
OLR1-1A
TO HVTB
10A
YR2-1A
(OPS2-1)
(SSPS2)
YR1-1A
P
HPS2
JP5B
P
JP3B
10B
64B
8B
JP4B
(CB2A-1)
ATB
(OPS1-1)
(SSPS1)
HPS1
JP5A
JP3A
(UVM-1)
1
JP1
1A
64A
8A
JP4A
(CB1A-1)
S1
1B
9A
A4 (HPS-1)
A17 (S. FAN MOTOR FAULT)
A15 (COOLING STAGE 2)
AC (DIGITAL COM)
A20 (AUX. ALARM COMP2)
A19 (AUX. ALARM COMP1)
1C
52
71B
A18
A16
1O
A11 (FLOW SWITCH)
A9 (HPS-2)
A6 (SSPS-2)
A7 (CB-2)
A8 (OL-2)
A5 (FCB-1)
A12
A13 (EMERGENCY)
A14 (COOLING STAGE 1)
71A
67
A10
23B
9B
AO1
AO2
AO3
3A
CC1
4
6
15
TO ATB
A2 (CB-1)
A3 (OL-1)
A1 (SSPS-1)
23A
5
24V AC
AO4
PE
TO ATB
17
L1
3
Y2
460V
230V
TRANS2
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)
R15(DIG OUT)
R16(DIG OUT)
R17(DIG OUT)
R18(DIG OUT)
+
-
O1
-
SH
D1
ST1
18C
17C
18NO
(A5-SP1)
-
+
S1
17NO
16NO
15NO
SH
OPT1
DPT1
SPT2
DPT2
33A
29B
30B
SH
28B
SH
32A
SH
30A
31A
COMP2
+
+
-
COMP1
COMP1
+
-
-
SPT1
28A
29A
COMP1
-
+
C
C
11NO
13NO
14NO
12NO
9NO
10NO
8NC
5C
8C
7C
6C
4C
3C
2C
5O
8NO
7O
6O
4O
3O
2O
COMMON FAULT INDICATION
CONNECTION (SYSTEM 2)
REFER FAN MOTOR CONTROL
CONNECTION (SYSTEM 1)
REFER FAN MOTOR CONTROL
(VOLT-FREE CONTACT)
20
(230Vac)
15B
14B
HGS
15A
14A
PDS2
3B
UL2
CC2
UL1
2
L3
YR2
TO HVTB
(FIELD INSTALLATION)
FROM THERMOSTAT OR DDC
SWITCHING CONTACTS
AHU MOTOR CONTROL
STG1 COOLING
COM
(OPTIONAL CONNECTION)
TRANS1
ATB
15
G
Y1
C
LVTB
R
230V
24V
(75VA)
ATB
17
YR1
2
TO ATB
1
COMP1 CONTACTOR
JP6
JP7
F4
F2
F1
F3
SET
*
*
SERIAL CABLE
3
COM1
S1
ON
1 2
GND
DIP
4
+
(A10-OP2)
-
O2
+
(A9-DP2)
SH
OPT2
32B
33B
SH
31B
SH
COMP2
-
+
+
SH
ST2
T.OUT
(A1-ST1)
TIN
SH
SH
+
(A7-OP1)
(A8-SP2)
+
SH
-
S2
(A6-DP1)
PDS1
AHU MOTOR ON/OFF CONTROL
(FOR RECIP. COMP ONLY)
(FOR RECIP. COMP ONLY)
OIL PRESSURE TRANSDUCER
OIL PRESSURE TRANSDUCER
DISCHARGE PRESSURE TRANSDUCER
DISCHARGE PRESSURE TRANSDUCER
SUCTION PRESSURE TRANSDUCER
SUCTION PRESSURE TRANSDUCER
COMP2
-
D2
-
USER INTERFACE BOARD
COOLING 75%
TOUT=15°C TIN=28°C
ESC *
On/Off
MENU
