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CG-PRC011-EN36
Typical Wiring
Diagrams
NOTES:
1. DASHED LINES INDICATE RECOMMENDED FIELD WIRING BY OTHERS. PHANTOM LINES INDICATE
ALTERNATE CIRCUITRY OR AVAILABLE SALES OPTION. CHECK SALES ORDER TO DETERMINE IF
WIRING IS REQUIRED FOR SPECIFIC OPTIONS.
2. ALL THREE PHASE MOTORS SUPPLIED WITH THE UNIT ARE PROTECTED UNDER PRIMARY SINGLE
PHASE FAILURE CONDITIONS.
4. CAUTION - DO NOT ENERGIZE UNIT UNTIL CHECK OUT AND START-UP PROCEDURES HAVE BEEN
COMPLETED.
5. USED ON 40, 50 AND 60 TON UNITS ONLY.
6. SEE INSET “A” FOR PROGRAMMING RESISTOR CONNECTIONS . TO PROGRAM AN EXTERNAL
CHILLED WATER SETPOINT WHEN A 4-20 mA/0-10 VDC SIGNAL IS NOT USED. SEE THE OPERATORS
MANUAL FOR PROGRAMMING RESISTOR CONNECTIONS FOR USE ON NORMAL COOLING OR ICE
MAKING APPLICATIONS.
7. SEE INSET “C” FOR CONTACTS (IN PLACE OF ZONE TEMP. SENSOR) FOR OPTIONAL ICE MACHINE
CONTROL.
8. THE FOLLOWING CAPABILITIES ARE OPTIONAL - THEY ARE IMPLEMENTED AND WIRED AS
REQUIRED FOR A SPECIFIC SYSTEM APPLICATION.
A ICE-MACHINE CONTROL (CANNOT BE USED WITH OPT. L)
B COMMUNICATIONS INTERFACE
G REMOTE RUNNING INDICATION AND ALARM CONTACTS
H UNIT DISCONNECT, NON-FUSED
J CHILLED WATER RESET - RETURN WATER
K CHILLED WATER RESET - OUTDOOR AIR TEMP. SENSOR OPTIONAL ON CGWE AND
STANDARD ON CCAD.
L CHILLED WATER RESET - ZONE AIR (CANNOT BE USED WITH OPT. A)
O LOW AMBIENT THERMOSTAT
P HIGH AMBIENT LOAD LIMIT THERMOSTAT
Q ENTERING AND LEAVING CONDENSER WATER TEMP. SENSOR. MATCHED PAIR OF
THERMISTOR FOR 4RT1 AND 4RT2.
WIRING AND CONTACT REQUIREMENTS:
21. ALL FIELD WIRING MUST BE IN ACCORDANCE WITH THE NATIONAL ELECTRICAL CODE (NEC),
STATE, AND LOCAL REQUIREMENTS. OUTSIDE THE UNITED STATES, OTHER COUNTRIES
APPLICABLE NATIONAL AND/OR LOCAL REQUIREMENTS SHALL APPLY.
24. CUSTOMER SUPPLIED CONTACTS MUST BE COMPATIBLE WITH DRY CIRCUIT 12 VDC, 45 mA
RESISTIVE LOAD. SILVER OR GOLD PLATED CONTACTS ARE RECOMMENDED.
25. 30 VOLT OR LESS CIRCUIT. DO NOT RUN IN CONDUIT WITH HIGHER VOLTAGE CIRCUITS. USE #14-
18 AWG. SEE SELECTION TABLE.
26. MINIMUM CONTACT RATING AT 115 VAC: 6.9 VA INRUSH, 6.9 V A SEALED.
28. WHEN CUSTOMER INPUT IS REQUIRED, REMOVE JUMPER AND INSTALL CUSTOMER WIRING.
29. LOSS OF CHILLED WATER FLOW PROTECTION IS PROVIDED BY THE UNIT WITHOUT THE NEED
FOR A CHILLED WATER FLOW SWITCH. THE USE OF A CHILLED WATER FLOW SWITCH IS AT THE
CUSTOMER’S DISCRETION.
30. FAN STAGING IS CONTROLLED BY THE COMPRESSOR CHILLER. TO INSURE PROPER FAN
OPERATION ADD JUMPER TERMINALS ON 1TB3 AS SHOWN. REMOVE JUMPER FROM 1TB2-4 TO
1TB2-3 ON ALL CAUC UNITS. REMOVE JUMPER FROM 1TB2-9 TO 1TB2-8 ON ALL 40, 50 AND 60
TON CAUC UNITS. IF LOW AMBIENT OPTION, ADD JUMPER FROM 1TB3-6 TO 1TB3-7 AND FROM
1TB3-11 TO 1TB3-12.