LEGEND
AHU AIR HANDLING UNIT
AI ANTI ICE THERMOSTAT
AR AUXILIARY RELAY
ATB AUXILIARY TERMINAL BLOCK
CAP CAPACITOR
CC COMPRESSOR CONTACTOR
CB CIRCUIT BREAKER
C. HTR CRANKCASE HEATER
COMP COMPRESSOR
CR CONTROL RELAY
FM FAN MOTOR (CONDENSER)
FMC FAN MOTOR CONTACTOR
FR FAULT RELAY
FCS FAN CYCLING SWITCH
HPS HIGH PRESSURE SWITCH
HVTB HIGH VOLTAGE TERMINAL BLOCK
JP JUMPER
L1 LINE 1
L2 LINE 2
L3 LINE 3
LPS LOW PRESSURE SWITCH
LUG LUG GROUND
PDS PUMP DOWN SOLENOID
PDSR PUMP DOWN SOLENOID RELAY
RR RESET RELAY
SSPS SOLID STATE PROTECTION SYSTEM
SD SMOKE DETECTOR
TRANS TRANSFORMER
T'STAT THERMOSTAT
UVM UNDER VOLTAGE MONITOR
VFC VOLT FREE CONTACT
YR COOLING RELAY
FIELD WIRING
DISCONNECT TAB - 1/4"
SPLICE-CLOSED END
TYPICAL SCHEMATIC WIRING DIAGRAM
_ _ _
+
NOTES
1. POWER SUPPLY, REFER TO UNIT NAMEPLATE.
2. ANY WIRE REPLACEMENT SHOULD BE OF THE 90
0
C
OR ITS EQUIVALENT.
USE COPPER CONDUCTOR WIRES ONLY.
3. 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.
4. FUSED DISCONNECT SWITCH OR CIRCUIT
BREAKER TO BE PROVIDED BY END USER WITH
RATING AS RECOMMENDED BY ZAMIL.
5. ATB (3) & (5) IS APPLICABLE FOR PDS OPTION UNITS
ONLY.
6. ALLOW 2-3 MINUTES FOR SSPS SWITCH TO CLOSE,
BEFORE STARTING THE UNIT.
7. USE DISCONNECT TAB OR SPLICE ONLY WHERE
EVER REQUIRED FOR EXTENSION OF ORIGINAL
WIRE.
8.
REMOVE JUMPER FOR AI OPTION. ROUTE AI
WIRES FROM AHU.
MODELS : CX180 - CX220 (DUAL COMPRESSOR UNITS)
23A
23ATO
LPS1
LPS2
TO
HPS1
HPS2
24A
24A
5. HPS OPTION
COMP2:
COMP1:
CONNECTION FOR COMP. WITH SSPS
CRANKCASE HTR CONNECTION
(SEE NOTE 6)
REMOVE JP7
SSPS2
REMOVE JP4
SSPS1
1
M1/11
L1/MP
1
M1/11
L1/MP
2
L2/R
M2/14
2
M2/14
L2/R
C2-TRIP
C2-OFF
FR1-1
43
C2-ON
60
CC2A-2A
61
FR2-1
UNIT-TRIP
44A
62
CC2A-2B
44
63
A) UNIT ON & OFF INDICATION
UNIT TRIP INDICATION OPTION
B) COMP ON, OFF & TRIP [&]
3. VOLT FREE CONTACT OPTIONS
2. SMOKE DETECTOR OPTION
55
1741A
FR2-2
FR2-2
C1-TRIP
C1-OFF
ATB(8)
41B
59
FR2
COMP2
FR1-2
FR1-2
56
C1-ON
CC1A-2A
57
CC1A-2B
54
FR1
17
58
VFC-FROM CUSTOMER'S
AR1-1
UNIT OFF
AR1
ATB(7)
UNIT ON
45
AR1-1
15
COMP1
46
17
REMOVE JP2
SMOKE DETECTOR
1A
47
1B
SET POINTS
1. UVM OPTION
HPS1&2
LPS1&2
NAME
360 ± 15
50 ± 5
(PSIG)
CLOSEOPEN
(PSIG)
450 ± 10
25 ± 5
FOR 3PH FAN MOTOR ONLY
4. LOW AMBIENTOPTION APPLICABLE
CC1A-1
CC2A-1
CB1
CC1
LUG
L3
COMP
1
FM1
FMC1
T3A
T2A
T1A
L3A
L2A
L1A
35A
36A
37A
COMP
2
L3B
T3B
CC2
T1B
T2B
CB2
L1B
L2B
FMC2
35B
FM2
ATB2
37B
36B
1
CONNECTION APPLICABLE FOR 1PH FAN MOTOR ONLY
CIRCUIT BREAKER OPTION
L1/L1A
CAP1
35A
36A
HVTB
L2
L1
FMC1
36A
37A
FM1
L2/L2A
FMC2
35B
CAP2
36B
FM2
36B
37B
L2/L2B
L3/L3B
FMC1
35A L1
ATB2
FM2
FCS1
FCS2
12B
12A
FM1
FMC1
13
FMC2
FAN1 CONTACTOR
FAN2 CONTACTOR
2
36A
37A
L2
L3
FMC2
35B
36B
TO HVTB
37B
UVM
Ø
ØØ
1
TO ATB
1A
TO ATB
(REMOVE JP1)
Ø
UVM-1
1
Ø
8
L1 L2 L3
12
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