Contents Page
Model decoding ....................................................................................................................................... 2
Physical data ......................................................................................................................................... 3-4
Electrical data ........................................................................................................................................... 5
Dimensions.......................................................................................................................................... 6-13
Microprocessor control system............................................................................................................... 14
User sequence of operation ................................................................................................................... 15
Typical schematic wiring diagram...................................................................................................... 16-23
Field wiring connections ......................................................................................................................... 24
Rigging instructions & weight distribution ............................................................................................... 25
Load distribution ..................................................................................................................................... 26
INSTALLATION INSTRUCTIONS
General................................................................................................................................................... 27
Location of unit ....................................................................................................................................... 27
General................................................................................................................................................... 27
Refrigerant piping connections ............................................................................................................... 27
Leak testing & refrigerant charging......................................................................................................... 28
Start-up inspection & check list ......................................................................................................... 28-29
Check-out & operational start-up procedure ........................................................................................... 29
ELECTRICAL
Power supply .......................................................................................................................................... 30
Unbalanced voltage ................................................................................................................................ 30
Motor contactor ...................................................................................................................................... 31
Fan motor ............................................................................................................................................... 31
Crankcase heater ................................................................................................................................... 31
Lube oil protection control ...................................................................................................................... 31
Voltage monitor ...................................................................................................................................... 31
REFRIGERATION
Compressor ............................................................................................................................................ 32
High & low pressure protection.......................................................................................................... 33-34
Pump down control................................................................................................................................. 34
Trouble shooting chart ....................................................................................................................... 35-37
Parts list ................................................................................................................................................. 38
Recommended spare parts .................................................................................................................... 39
Preventive maintenance schedule.......................................................................................................... 40
Material safety data sheet ...................................................................................................................... 41
Pressure temperature chart............................................................................................................... 42-43
INDEX
CONTINUING RESEARCH RESULTS IN STEADY IMPROVEMENTS.
THEREFORE, THESE SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE.
1
2
1, 2 & 3
BASIC 4, 5 & 6
NOMINAL
COOLING
CAPACITY*
(MBH)
8
SPECIAL OPTIONS
7
ELECTRICAL
SUPPLY
( V-Ph-Hz )
10
GENERATION CODE
CNX
CONDENSING
UNIT
150
220
240
300
360
420
480
540
600
720
840
**M00
**M10
**M20
**M40
**M60
***2M00
***2M40
Z :SPECIAL OPTIONSF : 460-3-60 00
01
02
03
9
MANUFACTURING YEAR
06
07
08
MODEL DECODING
* Capacity in MBH (MBH x 1000 = BTUH).
** M indicates for 1 Million BTUH.
*** 2M indicates for 2 Million BTUH.
MODEL NUMBER CNX150 CNX220 CNX240 CNX300 CNX360 CNX420 CNX480 CNX540 CNX600
NOMINAL CAPACITY , TONS*13 19 22 28 31 36 41 47 53
NUMBER OF REFRIGERATION CIRCUIT Dual Dual Dual Dual Dual Dual Dual Dual Dual
COMPRESSOR Type Scroll Semi-hermetic reciprocating
Oil per system (liters) 4.1 4.1 4.1 4.7 4.68 4.68 4.94 4.94 4.94
Refrigerant R-134a
Charge per system (oz)** 235 330 400 504 570 650 750 850 945
CONDENSER FAN Type Propeller
Qty. – Diameter (mm) 2 – 560 2 – 630 2 – 700 2 – 700 3 – 700 3 – 700 4 – 700 4 – 700 4 – 700
Nominal CFM 8400 10000 15000 15000 22500 22500 30000 30000 30000
Motor kW – RPM
0.66–1010 0.86–1020 1.45–1000 1.45–1000 1.45–1000 1.45–1000 1.45–1000 1.45–1000 1.45–1000
CONDENSER COIL Type Inner grooved tubes and enhanced fins
Tube Dia–Rows–Fins per inch
3/8–3–14 3/8–4–14 3/8–4–14 3/8–4–14 3/8–3–14 3/8–4–14 3/8–4–14 3/8–4–14 3/8–5–14
Total face area (Sq. ft.) 28 28 28 28 46.66 46.66 56 56 56
HIGH PRESSURE SWITCH
Open (PSIG) 350 ± 10 350 ± 10 350 ± 10 350 ± 10 350 ± 10 350 ± 10 350 ± 10 350 ± 10 350 ± 10
Close (PSIG) 300 ± 10 300 ± 10 300 ± 10 300 ± 10 300 ± 10 300 ± 10 300 ± 10 300 ± 10 300 ± 10
LOW PRESSURE SWITCH
Open (PSIG) 10 ± 5 10 ± 5 10 ± 5 10 ± 5 10 ± 5 10 ± 5 10 ± 5 10 ± 5 10 ± 5
Close (PSIG) 30 ± 5 30 ± 5 30 ± 5 30 ± 5 30 ± 5 30 ± 5 30 ± 5 30 ± 5 30 ± 5
REFRIGERANT LINES+
Suction line size
(OD), inch 1-3/8 1-5/8 1-5/8 1-5/8 1-5/8 1-5/8 2-1/8 2-1/8 2-1/8
Liquid line
size
(OD), inch 5/8 7/8 7/8 7/8 7/8 1-1/8 1-1/8 1-1/8 1-1/8
SOUND PRESSURE LEVEL, dBA (@ 3/5/10 meter)
++
69/65/60 69/65/60 69.3/65.8/60.5 69.7/66.1/60.9 69.8/66.3/61 72.9/69.3/64.1 72.8/69.3/64 72.9/69.3/64.1 73.3/69.8/64.5
OPERATING WEIGHT, Kg. 800 925 980 1060 1325 1400 1525 1600 1675
PHYSICAL DATA
NOTE:
*Nominal cooling capacity @ 950F outdoor and 450F saturated suction temperatures.
** Operating system charge is applicable when matched with air handling units & connected by 25 feet of refrigerant piping.
+Pipe sizes are for runs up to 50 feet to indoor unit. For refrigerant lines longer than 50 feet, use next larger size.
++ Based on free field area at ARI conditions. Tolerance: ±2dBA.
3
MODEL NUMBER CNX720 CNX840 CNXM00 CNXM10 CNXM20 CNXM40 CNXM60 CNX2M00
CNX2M40
NOMINAL CAPACITY , TONS*63 64 75 92 105 121 139 154 281
NUMBER OF REFRIGERATION CIRCUIT Dual Dual Dual Dual
Quadruple Quadruple Quadruple Quadruple Quadruple
COMPRESSOR Type Semi-hermetic reciprocating Screw
Oil per system (liters) 4.94 4.94 5.2 5.2 4.94 4.94 5.2 5.2 22
Refrigerant R-134a
Charge per system (oz)** 1125 1145 1350 1660 945 1090 1250 1390 2520
CONDENSER FAN Type Propeller
Qty. – Diameter (mm) 6 – 700 6 – 700 6 – 800 6 – 800 6 – 800 8 – 800 8 – 800 10 – 800 16 – 800
Nominal CFM 45000 45000 73266 73266 69000 93256 87032 108790 192048
Motor kW – RPM
1.45–1000 1.45–1000 2.15–970 2.15–970 2.15–970 2.15–970 2.15–970 2.15–970 2.15–970
CONDENSER COIL Type Inner grooved tubes and enhanced fins
Tube Dia–Rows–Fins per inch
3/8–4–14 3/8–5–14 3/8–3–14 3/8–3–14 3/8–4–14 3/8–3–14 3/8–3–14 3/8–4–14 3/8–3–14
Total face area (Sq. ft.) 70 70 120 120 120 140 140 175 304
HIGH PRESSURE SWITCH
Open (PSIG) 350 ± 10 350 ± 10 350 ± 10 350 ± 10 350 ± 10 350 ± 10 350 ± 10 350 ± 10 350 ± 10
Close (PSIG) 300 ± 10 300 ± 10 300 ± 10 300 ± 10 300 ± 10 300 ± 10 300 ± 10 300 ± 10 300 ± 10
LOW PRESSURE SWITCH
Open (PSIG) 10 ± 5 10 ± 5 10 ± 5 10 ± 5 10 ± 5 10 ± 5 10 ± 5 10 ± 5 10 ± 5
Close (PSIG) 30 ± 5 30 ± 5 30 ± 5 30 ± 5 30 ± 5 30 ± 5 30 ± 5 30 ± 5 30 ± 5
REFRIGERANT LINES+
Suction line size
Dual 2-1/8 2-1/8 2-5/8 2-5/8 N.A. N.A. N.A. N.A. N.A.
(OD), inch Quadruple N.A. N.A. N.A. N.A. 2-1/8 2-1/8 2-5/8 2-5/8 3-1/8
Liquid line size Dual 1-1/8 1-1/8 1-3/8 1-3/8 N.A. N.A. N.A. N.A. N.A.
(OD), inch Quadruple N.A. N.A. N.A. N.A. 1-1/8 1-1/8 1-1/8 1-1/8 1-3/8
SOUND PRESSURE LEVEL, dBA (@ 3/5/10 meter)
++
73.3/69.8/64.5 73.3/69.8/64.5 74.7/1.2/66 75.7/72.7/66.9 76.2/72.7/67.4 77.1/73.6/68.3 77.7/74.2/69 78.1/74.6/69.3 81.4/77.9/72.6
OPERATING WEIGHT, Kg. 2100 2600 3500 3700 4250 4700 5600 5095 8500
PHYSICAL DATA
NOTE:
*Nominal cooling capacity @ 950F outdoor and 450F saturated suction temperatures.
** Operating system charge is applicable when matched with air handling units & connected by 25 feet of refrigerant piping.
+Pipe sizes are for runs up to 50 feet to indoor unit. For refrigerant lines longer than 50 feet, use next larger size.
++ Based on free field area at ARI conditions. Tolerance: ±2dBA.
4
LRA
(each)
RLA
(each)
460-3-60
460-3-60
460-3-60
460-3-60
460-3-60
460-3-60
460-3-60
460-3-60
460-3-60
460-3-60
460-3-60
460-3-60
460-3-60
460-3-60
460-3-60
460-3-60
460-3-60
460-3-60
CNX 150
CNX 220
CNX 240
CNX 300
CNX 360
CNX 420
CNX 480
CNX 540
CNX 600
CNX 720
CNX 840
CNX M00
CNX M10
CNX M20
CNX M40
CNX M60
CNX 2M00
CNX 2M40
UNIT
SIZE
SUPPLY VOLTAGE COMPRESSOR MOTOR CONDENSER FAN MOTORS
MOCP
MCAMax.Min.
Nominal
(V-Ph-Hz)
414
414
414
414
414
414
414
414
414
414
414
414
414
414
414
414
414
414
506
506
506
506
506
506
506
506
506
506
506
506
506
506
506
506
506
506
25.7 35 2 11.4 125 0.66 1.0 2.4 2
39.0 50 2 15.9 158 0.86 1.6 4.1 2
45.7 60 2 18.1 187 1.45 2.5 10.0 2
56.1 75 2 22.7 225 1.45 2.5 10.0 2
60.6 80 2 23.6 193 1.45 2.5 10.0 3
70.5 90 2 28.0 220 1.45 2.5 10.0 3
77.5 100 2 30.0 262 1.45 2.5 10.0 4
91.0 125 2 36.0 262 1.45 2.5 10.0 4
108.8 150 2 43.9 323 1.45 2.5 10.0 4
147.1 200 2 58.7 404 1.45 2.5 10.0 6
147.1 200 2 58.7 404 1.45 2.5 10.0 6
183.5 250 2 72.5 513 2.15 3.4 10.0 6
207.6 275 2 83.2 590 2.15 3.4 10.0 6
207.0 250 4 43.9 323 2.15 3.4 10.0 6
276.7 325 4 58.7 404 2.15 3.4 10.0 8
335.3 400 4 72.5 513 2.15 3.4 10.0 8
342.1 400 4 72.5 513 2.15 3.4 10.0 10
548.6 650 4 117.4 801 2.15 3.1 10.0 16
Qty.
ELECTRICAL DATA
FLA
(each)
Qty.
LRA
(each)
kW
LEGEND:
MCA - Minimum Circuit Ampacity
MOCP - Maximum Over Current Protection
RLA - Rated Load Amps
LRA - Locked Rotor Amps
kW - Kilowatt
FLA - Full Load Amps
5
255.0 [10.00]
TYP
357.5 [14.07]
TYP
335.4 [13.20]
375.6 [14.80]
2121
[86.50]
2197
[83.50]
1550 [61.0]
203 [8.0]
DIMENSIONS
CNX 480 - CNX 600
CNX 720 - CNX 840
NOTES: 1. All dimensions are in mm, (dimensions in brackets are in inches).
2. Allow 48" (1219 mm) clearance on all sides for proper airflow.
7
73 [2.875] 968
(38.11")
968
(38.11")
965
(37.99")
"B" "C"
SIDE VIEW
FRONT VIEW
TOP VIEW
14
MICROPROCESSOR CONTROL SYSTEM
Each condensing unit are provided with microprocessor based control board that monitors analog and digital inputs to
achieve precise control and safety functions during unit’s operation. Input signals for cooling control can be digital signals
coming from a thermostat device or analog signals from a PTC temperature sensor. The push button key board allows
accessing to the operating conditions, control set points (in case temperature control is analog signal), & alarm history
that are clearly displayed on a multi-line back illuminated LCD panel.
The unit’s controller consists of the following hardware:
1. User Interface Board – Includes push buttons to access operating conditions, change control set points, and
view alarm history. Data are clearly displayed on its LCD panel.
2. Main Board – This controls up to 2 compressor system.
3. Auxiliary Boards – Required for controlling an additional (2) or more compressors.
LCD Display Information:
In the normal operating mode, the 20 x 4 characters LCD panel displays the system status, temperature of leaving /
returning air and set point (if temperature control selected is through PTC sensors ), run time of compressor and alarm
history.
Measurement data for each circuit can be easily accessed and displayed on the LCD. Data include the following:
- Suction, Discharge, and Oil pressures
- Leaving / Returning Air temperature ( if temperature control selected is through PTC sensors )
- Compressor Motor Status
- Condenser Fan Motor Status
- Liquid Line Solenoid Status
- Supply Fan Motor Status
There are three LED lights on the user interface board to indicate “Power On” (green), “Menu Adjustment” (yellow) and
“Fault” (red).
SYSTEM PROTECTION
The unit is equipped with protective devices against motor overloads and proper system settings are factory set to ensure
safe and reliable operation of the unit. Some of these devices and settings are as follows:
-Compressor Motor External Overload Relay
-Compressor Motor Winding Over Temperature Protection
-Low suction Pressure
-High Discharge Pressure
-Low Oil Pressure
-Compressor Anti-Recycling Timer
15
USER SEQUENCE OF OPERATION
Machine Starting:
- If OFF, the machine is started by pushing the ON/OFF button.
- The ON LED (green) will lit.
- On the main screen is showed the status “STARTING”.
- After 15 seconds of delay the system will be running.
Machine Shut-Down:
- The machine is halted pushing again the ON/OFF key.
- The ON LED (green) is switched off.
- On the main screen is showed the status “STOPPING”.
- All the compressors are stopped.
- Blower motor will be switched off after pre-set delay timing when all compressors are switched off.
- On the main screen is showed the status “SYSTEM OFF”.
Set Point Change:
- Press “SET”, the LCD will ask the password input.
- Using the “UP” and “DOWN” keys input the correct password.
- Press “SET”, the “MODIFY” word appears to allow the parameter to be changed. The LCD will show the actual
value.
- Using the “UP” and “DOWN” keys modify the set point value.
- Press “SET” to store it or “ESC” to exit without memorizing.
COMPRESSOR CONTROL
Control setting to switch on / off the compressors is through digital output signals from an external controller fed to the
micro-processor board. When the system is started up, the software starts to check all the necessary inputs to start the
unit. It scans the digital/analogue inputs. If any unwarranted interruption occurred the alarm signal is generated and the
compressor will be shut-off.
BLOWER MOTOR CONTROL (OPTIONAL)
Control setting to switch on / off the blower motor is through digital output signal from an external controller fed to the
micro-processor board. The system’s control will prevent the compressors to operate if this signal is not fed to the micro-
processor board.
CLASSIC
AIR CONDITIONERS
TOUT = 10°C TIN = 15°C
COOLING 75%
SET
Menu
Esc
On/Off
OLR2 CC1 CC2
OLR1
OLR2
CC2
CB6 CB7CB6 CB6
UVM-1
CC1
OLR1
CC3
OLR3
CB7
FMC1
CB6 CB8
FMC5FMC4FMC2
CB7
FMC6
FMC2FMC1 FMC2FMC1 FMC3 FMC1
OPS1-1
OPS2-1
FMC4FMC2
CC2A-1B
CC1A-1B
DIP SWITCH SETTINGS - MB BOARD
JU11 - CLOSED (1,2)
OFF
TD2 - CLOSED
S1 ON
12
OFF
3
OFF
4
OLR2
CC2
OLR4
CC4
OLR3
CC3
OLR1
CC1
ATB
JU9 - CLOSED (1,2)
JU8 - CLOSED (1,2)
JU7 - CLOSED (1,2)
JU6 - CLOSED (1,2)
JU5 - CLOSED (1,2)
JU4 - CLOSED (1,2)
JU3 - CLOSED (1,2)
JU2 - CLOSED
JU1 - CLOSED
HPS1 & 2
HIGH PRESSURE
HGS
LOW PRESSURE
TL2 - OPEN
TL1 - OPEN
TU2 - CLOSED
TU1 - CLOSED
JU19 - CLOSED (1,2)
JU15 - CLOSED (1,2)
JU13 - CLOSED (1,2)
JU12 - CLOSED (1,2)
JUMPER SETTINGS - MB BOARD
PRESSURE SETTINGS
460 ± 10
CUT-OFF (PSIG)
--
--
DESC.
--
--
360 ± 15
--
CUT-IN (PSIG)
--
2
20
ATB
MOTOR STARTER CONTROL
SWITCHING CONTACT
AHU MOTOR ON/OFF
R2-1
R2 (230Vac)
(OPTIONAL)
AHU CONTROL INTER-CONNECTIONS
CONDENSING UNIT
CONTROL PANEL
LVTB
17
67
ATB
1
ATB
ATB
G
CONTROL PANEL
AIR HANDLING UNIT
(AHU MOTOR CONTROL)
R1-1
R1 (24Vac)
(REMOVE JP7)
52
ATB
(N.C CONTACT)
AHU MOTOR FAULT
1
ATB
FMC3
FMC3
OLR2
CC1 CC2
OLR1
OLR4
CC4
8B1
3
4
4-FAN MOTOR LAYOUT
CNX 720~840 / CNXM00~20
FM2
14 NO
13 NO
12D
12F
12B
13D
T.K.
T.K.
FM4
13F
FM6
T.K. 13B
FMC6
FMC4
FMC2
CONTROL 6
PANEL 5C1
L3L2L1L1 L2 L3L2L1 L3
FM2FM3FM1
TO MB
10 NO
9 NO
12C
12E
12A
103C
35C
104A
36A
35A 103A
37A 105A
37C
36C 105C
104C
35B
36B
37B
103B
104B
105B
3B
MB
T2B
T1B
T3B
9B
4-FAN MOTOR LAYOUT
CNX 480~600
L3L2
HVTB
PANEL 4
CONTROL 3
C2 2
C1 1
1
11B
61B
OLR4-1A
CC2
CC4
T2D
COMP
2
T1D
T3D
1
2
T1B
1
T3A
(AS APPLICABLE)
COMP
2
T2B
T3B
HVTB
T2B
(REMOVE JP3A)
SSPS1
M1/11
L1/MP/L
SSPS2
L2/R/N
M2/14 8A
2
T1C
CB1A-1A
T3A
T1A
T2A
COMP
1
23A 1
T3C
T2C
T1B
CB2A-1A
COMP
2
T3B
T2D
T1D
T3D
23B
L2B
COMPRESSOR IN PWS CONNECTION WITH CB
L1C
L3A
L1A
L2A
CB1
L3C
L2C
L1B
1
T3A
T1A
T2A
COMP
L3D
L3B
L1D
L2D
CB2
(OPTIONAL)
2
T2B
T3B
T1B
COMP
(OPTIONAL)
COMPRESSOR WITH CB CONNECTION
HVTB
L2A
L1A
L3A
L3
L1
L2
CB1
L2B
L1B
L3B
CB2
TD1 - CLOSED
JU10 - CLOSED (1,2)
2
2
M2/14
L2/R/N 2
OLR3-1A
3-FAN MOTOR LAYOUT
CNX 360~420
COMPRESSOR POWER & CONTROL CONNECTION IN PART WINDING STARTING (PWS)
CONDENSER FAN MOTOR POWER AND CONTROL CONNECTIONS
T3C
T2A
COMP
L1 L3L2
HVTB CNX 220~300
2-FAN MOTOR LAYOUT
C1
PANEL
CONTROL 1 2C2
10A
L1 L3L2
HVTB L1
PANEL
HVTB
L2 L3
CONTROL
3A
1O
MB
T1A
OLR1-1A
CC1A-2A
11A
61A CC3
CC1
COMP
T3A
T2A
1
T1C
T2C
Ø
L2
(REMOVE JP1)
Ø
1
Ø
L1
1A
1
UVM
Ø
8
Ø
L3
UVM CONNECTION(OPTIONAL)
L2L1 L3
L1
L3
L2
HVTB
T1A
POWER SUPPLY
(NOTE 4)
HVTB
LUG/ETB
L2
L3
L1
L1
L3
L2
COMP. 1:
COMP. SSPS CONNECTION(AS APPLICABLE)
COMP. 2:
OLR2-1A
CC2A-2A
L1
10B9A
HVTB
L3
2
C2
3C1 1L1 L2
4O
2
COMP 2
103B
35B
12A
12D
14 NO
FM4
T.K.
12B
12C
10 NO
13 NO
9 NO
T.K.
FM2
FM3
T.K.
105A
37A
2
FM1
35A
36A
103A
104A
FM3
TO MB T.K.
FM1
104C
36C
35C 103C
37C 105C
13A
13D FMC4
13B FMC2
13C FMC3
COMP 1
FMC1
FM2
2
FM4
37B
36B 105B
104B
36D
35D
37D
104D
103D
105D
64B
OPS2
(REMOVE JP5A)
(REMOVE JP5B)
1
3B 2240 2
64A
C.HTR2
C.HTR1
OPS1
3A
1
2
L1
L2
240 2
L2
L3
(REMOVE JP4B)
100A
101A
1
1
M1/11
L1/MP/L
C.HTR1
C.HTR2
FM6FM5FM4
FM3
T.K. 13C
FM5
T.K. 13E
FMC3
FMC5
T.K.
FM1
13A
2
FMC1
103E
35D
36D 104D
103D
37D 105D
37E
36E
35E
105E
104E
35F
36F
37F
104F
103F
105F
12A 12A
HVTB
13 NO
9 NO
12B
HVTB
13B
FM2
T.K. FMC2
103B
35B
TO MB
FM1
104A
36A
35A 103A
37A 105A
FM1
T.K.
FM2
FMC1
2
37B
36B 105B
104B
12A 13A
12B
12C
10 NO
9 NO
13 NO
HVTB
T.K.
FM2
FM3
T.K.
FMC2
13B
FMC3
13C
105C
FM3FM1
TO MB
35A
36A
37A
103A
105A
104A
36C
35C 103C
104C
T.K.
FM1 FMC1
FM2
104B36B
37C
35B 103B
37B 105B
C2 2
1
(SEE NOTE 3)
CRANKCASE HTR CONNECTION(AS APPLICABLE)
COMP. 1:
COMP. 2:
COMP. 1:
B. SCROLL COMP.
OIL PRESSURE SWITCH CONN.(AS APPLICABLE)
COMP. 2:
A. SEMI-HERMETIC RECIP. COMP.
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.
16
SCHEMATIC WIRING DIAGRAM
POWER SUPPLY : 460-3-60 (Dual compressor units)
APPLICABLE ON MODELS: CNX150 - CNXM10
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 900C
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)
1JP1 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
F2F1
F3
SET
*
*SERIAL CABLE 3
COM1
S1
ON
12
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
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.
18
SCHEMATIC WIRING DIAGRAM
POWER SUPPLY : 460-3-60 (Four compressor units)
APPLICABLE ON MODELS: CNXM20 - CNXM60
TO HVTB/BUSBAR
L2L1 L3
COMP3 COMP4
FAN2
CONTROL PANEL FAN1 FAN4 FAN6
FAN3 FAN5
CONDENSER FAN MOTOR POWER & CONTROL CONNECTIONS - 6 FANS / CNXM20
FAN LAYOUT
COMP1 COMP2
TO HVTB/BUSBAR
L3L2L1
ATB
52
ATB
1
ATB
2
20
ATB
MOTOR STARTER CONTROL
SWITCHING CONTACT
AHU MOTOR ON/OFF
AHU MOTOR FAULT
(REMOVE JP7)
(N.C CONTACT)
R2-1
R2 (230Vac)
AHU CONTROL INTER-CONNECTIONS
17
1
(REMOVE JP6) ATB
67
ATB
LVTB
G
ATB
CONTROL PANEL
CONDENSING UNIT
(AHU MOTOR CONTROL)
BMR-1A
BMR (24Vac)
AIR HANDLING UNIT
CONTROL PANEL
(OPTIONAL)
FMC1 FMC3
CB17
FMC4FMC5 FMC2
FM6
T.K.
2
FMC1
FMC3
12E
14 NO FMC5
13E
T.K.
13 NO
12A
10 NO
FM1
13A
T.K.
12C
9 NO
TO MB FM3
13C
T.K.
14 NO 12F
12F
13 NO
10 NO 12B
TO AB
9 NO 12D
FM3FM1
36C
35C
36A
37A
35A
37C 104C
103C
104A
105A
103A
105C
FM5
37E
35E
36E
FM2
37B
36B
35B
103E
104E
105E
105B
104B
103B
2
13F FMC6
T.K.
FM2 FMC2
13B
FMC4
T.K. 13D
FM4
36F
FM6FM4
37D
36D
35D
35F
37F 104F
105D
104D
103D
103F
105F
TO HVTB/BUSBAR
L2L1 L3
COMPRESSOR POWER & CONTROL CONNECTION
HVTB / BUSBAR
POWER SUPPLY
(NOTE 4) L3
L1
L2
ON (PSIG)
CLOSE (PSIG)
300 ± 15
3B
MB
2
1O 3C
2AB
COMP
1
T2A
T1A
T3A
COMP
2COMP
3
T3B
T1B
T2B
T1C
T3C
T2C
4O
CC3 3D
2AB
CC4
2
COMP
4
T3D
T2D
T1D
FM3,4
FM1,2,5,6 175125
225175
OFF (PSIG)FAN MOTOR #
HPS1 ~4 350 ± 10
LOW PRESSURE
HIGH PRESSURE
30 ± 510 ± 5
--300
OPEN (PSIG)
PRESSURE SETTINGS
DESC.
TL1 - OPEN
JU13 - CLOSED (1,2)
JU15 - CLOSED (1,2)
JU12 - CLOSED (1,2)
JU11 - CLOSED (1,2)
JU5 - CLOSED (1,2)
JU6 - CLOSED (1,2)
JU3 - CLOSED (1,2)
JU4 - CLOSED (1,2)
DIP SWITCH SETTINGS - AB BOARD
JUMPER SETTINGS (COMMON)
S1 OFF ON
21
OFF OFF
34
OFFOFF
OFFON
TD1 - OPEN
TU1 - OPEN
JUMPER SETTINGS - MB BOARD
JU1 - OPEN
JU2 - OPEN
DIP SWITCH SETTINGS - MB1 BOARD
TL1 - OPEN
TD1 - OPEN
S1 12
JU2 - CLOSED
43
JUMPER SETTINGS - MB BOARD
TU1 - OPEN
JU1 - CLOSED
FMC6
CB19
CB18
OLR2
CC2CC1
OLR1 OLR3
CC3 CC4
OLR4
TU2 - CLOSED
TL2 - OPEN
TD2 - CLOSED
JU9 - CLOSED (1,2)
JU10 - CLOSED (1,2)
JU8 - CLOSED (1,2)
CC1
1O 3A
MB
CC2
4O
JU19 - CLOSED (1,2)
JU7 - CLOSED (1,2)
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
6ATB
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
P10B
67
JP6
9B A9 (HPS-2)
A10
8B
JP5B
SSPS2
P10A
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
81 ØØ
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
12 43
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
1O1C
(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
DIPON
*
SERIAL CABLE
*
ESC
SET *
MENU
COM1
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