20
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
_ _ _
+
SCHEMATIC WIRING DIAGRAM
POWER SUPPLY : 460-3-60 (Four compressor units)
APPLICABLE ON MODELS: CNXM20 - CNXM60
R18(DIG OUT)
R17(DIG OUT)
R16(DIG OUT)
R15(DIG OUT)
R14(DIG OUT)
R13(DIG OUT)
R12(DIG OUT)
R11(DIG OUT)
R10(DIG OUT)
R9(DIG OUT)
R8(DIG OUT)
R7(DIG OUT)
R6(DIG OUT)
R5(DIG OUT)
R4(DIG OUT)
R3(DIG OUT)
R2(DIG OUT)
R1(DIG OUT)
TRANS1
(75VA)
YR1
BMR
17
ATB
2
TO ATB
Y1
HPS3
OLR3-1A
AO4
OLR4-1A
YR3-1A
YR4-1A
HPS4
P
10D
8D
JP5D
SSPS4
P
10C
A19 (AUX. ALARM COMP3)
AC (DIGITAL COM)
A20 (AUX. ALARM COMP4)
A14 (COOLING STAGE 3)
A15 (COOLING STAGE 4)
A16
A18
A17
71C
71D
A11
A13
A12
9D
A9 (HPS-4)
A10
AO1
A6 (SSPS-4)
(CB4A-1)
JP4D
64D
23D
A8 (OL-4)
A7 (CB-4)
9C
A4 (HPS-3)
A5
AO2
AO3
2
8C
JP5C
SSPS3
ATB
1
ATB
STG4 COOLING
STG3 COOLING
STG2 COOLING
A1 (SSPS-3)
24V AC
JP4C
(CB3A-1)
64C
23C
A3 (OL-3)
A2 (CB-3)
PE
TO ATB
15
17
TO ATB
Y4
Y3
Y2
YR3
YR4
YR2
(OPTIONAL CONNECTION)
STG1 COOLING
AHU MOTOR CONTROL
SWITCHING CONTACTS
FROM THERMOSTAT OR DDC
(FIELD INSTALLATION)
COM
G
C
(OPTIONAL CONNECTION)
R
LVTB
1
15
ATB
24V
230V
16NO
14NO
15NO
(SHEET 1 OF 3)
REFER FAN MOTOR CONTROL
CONNECTION (SYSTEM 3)
REFER FAN MOTOR CONTROL
(VOLT-FREE CONTACT)
COMMON FAULT INDICATION
10NO
C
12NO
13NO
11NO
C
8C
8NC
9NO
8NO
4O
3D
4C
6C
7C
5C
14D
6O
7O
5O
15D
PDS4
3C
2C
3O
14C
2O
15C
PDS3
3C
COMP4 CONTACTOR
COMP4 PUMP DOWN SOLENOID
(SEE COMP. POWER & CONTROL CONNECTION, SHEET 1 0F 3)
COMP4 CAPACITY UNLOADER SOLENOID
(50% UNLOADER SOLENOID)
UL4
COMP3 CAPACITY UNLOADER SOLENOID
COMP3 PUMP DOWN SOLENOID
(SEE COMP. POWER & CONTROL CONNECTION, SHEET 1 0F 3)
(50% UNLOADER SOLENOID)
UL3
1
+
(A10-OP2)
SH
33D
S1
31D
(A9-DP2)
SH
+
32D
SH
-
D2
30D
SH
-
OIL PRESSURE TRANSDUCER
+
COMP4
DISCHARGE PRESSURE TRANSDUCER
+
-
COMP4
CONNECTION (SYSTEM 4)
-
COMP3
-
OPT3
DPT3
SPT4
SH
TIN
SH
(A1-ST1)
ST2
SH
-
(A8-SP2)
S2
SH
29D
28D
+
-
O1
(A7-OP1)
32C
33C
T.OUT
ST1
SH
30C
+
(A6-DP1)
-
D1
SH
31C
+
S1
(A5-SP1)
SH
SH
29C
+
SUCTION PRESSURE TRANSDUCER
-
COMP4
OIL PRESSURE TRANSDUCER
-
COMP3
DISCHARGE PRESSURE TRANSDUCER
+
COMP3
-
SUCTION PRESSURE TRANSDUCER
+
(SHEET 1 OF 3)
SPT3
17NO
17C
18C
28C
18NO
+
+
SERIAL CABLE
TO MASTER BOARD MB
X53
OPT4
DPT4
-
DIP
O2
ON
GND
X52
3 4
2
COMP3 CONTACTOR
1O
1C