23
SCHEMATIC WIRING DIAGRAM
POWER SUPPLY : 460-3-60 (Four compressor units)
APPLICABLE ON MODELS: CNX2M00 - CNX2M40
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
_ _ _
+
STG2 COOLING
AHU MOTOR CONTROL
STG1 COOLING
(OPTIONAL CONNECTION)
Y2
Y1
G
C
YR2
YR1
(FIELD INSTALLATION)
FROM THERMOSTAT OR DDC
SWITCHING CONTACTS
COM
LVTB
R
ATB
15
(75VA)
TRANS1
230V
24V
1
ATB
17
TO ATB
2
SH
SH
GND
ON
1
SERIAL CABLE
+
(A10-OP2)
O2
DIP
S1
X52
2
4
3
SH
+
-
SH
S2
(A9-DP2)
D2
(A8-SP2)
TIN
28D
-
SH
30D
31D
+
-
29D
30C
D1
-
(A6-DP1)
(A7-OP1)
ST2
O1
SH
T.OUT
(A1-ST1)
31C
SH
+
-
+
SH
(A5-SP1)
SH
S1
ST1
28C
29C
-
SH
+
15NO
18C
17C
16NO
18NO
17NO
C
13NO
12NO
14NO
DISCHARGE PRESSURE TRANSDUCER
SUCTION PRESSURE TRANSDUCER
+
SPT4
COMP4
-
+
DPT4
COMP4
-
DISCHARGE PRESSURE TRANSDUCER
SUCTION PRESSURE TRANSDUCER
DPT3
-
COMP3
+
COMP3
-
SPT3
+
CONNECTION (SYSTEM 4)
REFER FAN MOTOR CONTROL
(SHEET 1 OF 3)
COMMON FAULT INDICATION
(VOLT-FREE CONTACT)
A20 (AUX. ALARM COMP4)
8NC
C
9NO
10NO
11NO
8C
7C
6C
14D
8NO
7O
6O
2O
2C
3C
5C
4C
3D
14C
3O
5O
4O
1C
AC (DIGITAL COM)
3C
1O
P
YR4-1A
YR3-1A
P
HPS4
JP5D
JP5C
HPS3
A10
AO1
71D
71C
A15 (COOLING STAGE 4)
A17
A16
A19 (AUX. ALARM COMP3)
A18
A11
A12
A13
A14 (COOLING STAGE 3)
OLR8-1A
(CB4A-1)
JP4D
10D
64D
8D
9D
23D
OLR7-1A
JP4C
(CB3A-1)
10C
64C
8C
9C
23C
AO2
AO3
A9 (HPS-4)
A6 (SSPS-4)
A7 (CB-4)
A8 (OL-4)
A5
AO4
24V AC
A4 (HPS-3)
A2 (CB-3)
A3 (OL-3)
A1 (SSPS-3)
PE
(50% UNLOADER SOLENOID)
COMP4 CAPACITY UNLOADER SOLENOID
CONNECTION (SYSTEM 3)
REFER FAN MOTOR CONTROL
(SHEET 1 OF 3)
UL4-2
(SEE COMP. POWER & CONTROL CONNECTION, SHEET 1 0F 3)
COMP4 CONTACTOR
(50% UNLOADER SOLENOID)
COMP3 CONTACTOR
(SEE COMP. POWER & CONTROL CONNECTION, SHEET 1 0F 3)
COMP3 PUMP DOWN SOLENOID
COMP4 PUMP DOWN SOLENOID
COMP3 CAPACITY UNLOADER SOLENOID
PDS4
UL3-2
PDS3
1
ATB
TO ATB
17
15
TO ATB
TO MASTER BOARD MB
X53
2
ATB
BMR
(OPTIONAL CONNECTION)
STG3 COOLING
STG4 COOLING
Y4
Y3
YR4
YR3
SSPS3
SSPS4
OLR5-1A
OLR6-1A
16D UL4-4
16C
UL3-4
CC6-1A
15D
CC5-1A
15C
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)
