CVHH-SVX001A-EN 63
System Control Circuit Wiring (Field Wiring)
Table 18. Unit control panel wiring 120 Vac
Standard Control Circuits: Unit
Control Panel Control W iring
( 120 Vac) Unit Control Term inations I nput or Output Type Contacts
Chilled Water Flow Proving Input
(a)
1X1-5 to 1K16-J3-2 Binary Input Normally Open, closure
with flow
Condenser Water Flow Proving Input
(b)
1X1-6 to 1K16-J2-2 Binary Input Normally Open, closure
with flow
Chilled Water Pump Relay Output 1K15-J2-4 to 6 Binary Output Normally Open
Condenser Water Pump Relay Output 1K15-J2-1 to 3 Binary Output Normally Open
Optional Control Circuits
( 120 Vac)
Note: Defaults are factory programmed, alternates can be selected at start-up using the service tool.
Alarm Relay MAR (Non-Latching) Output 1K19-J2-1 to 3 Binary Output Normally Open
Limit Warning Relay Output 1K19-J2-4 to 6 Binary Output Norm ally Open
Alarm Relay MMR (Latching) Output 1K19-J2-7 to 9 Binary Output Norm ally Open
Compressor Running Relay Output 1K19-J2-10 to 12 Binary Output Normally Open
Maximum Capacity Relay Output 1K20-J2-1 to 3 Binary Output Normally Open
Head Relief Request Relay Output 1K20-J2-4 to 6 Binary Output Norm ally Open
Purge Alarm Relay Output 1K20-J2-7 to 9 Binary Output Normally Open
Ice Making Relay Output 1K15-J2-10 to 12 Binary Output Norm ally Open
Free Cooling Relay Output 1K21-J2-4 to 6 Binary Output Norm ally Open
Standard Low Voltage Circuits
( less than 30 Vac)
( c)
Unit Control Panel
Terminations
I nput or Output Type Contacts
External Auto Stop Input 1K2-J2-1 to 2 Binary Input Closure required for
normal operation
Emergency Stop Input 1K2-J2-3 to 4 Binary Input Closure required for
normal operation
Optional Low Voltage Circuits
External Base Loading Enable Input 1K8-J2-1 to 2 Binary Input Norm ally Open
External Hot Water Control Enable Input 1K8-J2-3 to 4 Binary Input Norm ally Open
External Ice Machine Control Enable Input 1K9-J2-1 to 2 Binary Input Norm ally Open
External Free Cooling Input Enable Input 1K10-J2-1 to 2 Binary Input Norm ally Open
% RLA Compressor Output 1K5-J2-1 to 3 Analog Output 2–10 Vdc
External Condenser Pressure Output 1K5-J2-4 to 6 Analog Output 2–10 Vdc
Evaporator/ Condenser Differential Pressure
Output
1K5-J2-4 to 6 Analog Output 2–10 Vdc
Condenser Head Pressure Control 1K5-J2-4 to 6 Analog Output 2–10 Vdc
External Current Limit Setpoint Input 1K6-J2-2 to 3 Analog Input 2–10 Vdc, or 4–20 mA
External Chilled Water Setpoint I nput 1K6-J2-5 to 6 Analog Input 2–10 Vdc, or 4–20 mA
External Base Loading Setpoint Input 1K7-J2-2 to 3 Analog Input 2–10 Vdc, or 4–20 mA
Generic Refrigerant Monitor input 1K7-J2-5 to 6 Analog Input 2–10 Vdc, or 4–20 mA
Outdoor Air Temperature sensor IPC bus Connection and sensor Communication and sensor
Tracer Com m 4 Interface 1K3-J2-1(+ ) to 2(-)
1K3-J2-3(+ ) to 4(-)
Communication to Tracer (as ordered, see sales
order)
BACnet or MODBUS 1K1, 5(+ ) to 6(-) Communication to BACnet or
MODBUS
(as ordered, see sales
order)
LonTalk Comm 5 interface
1K4-J2-1(+ ) to 2(-)
1K4-J2-3(+ ) to 4(-)
Left Panel
Communication to LonTalk
(as ordered, see sales
order)
Note: All wiring to be in accordance with National Electrical Codes and any local codes
(a) I f the Chilled Water Flow Proving Input is a factory- installed ifm efector flow- sensing device, the secondary field device (recomm ended with 3.3°C [ 38°F]
and lower leaving chilled water temperatures) for proof of flow connects from 1X1-5 to 1K26-4 (binary input; norm ally open, closure with flow). Rem ove
factory jumper when used.
(b) If the Condenser Water Flow Proving Input is a factory-installed ifm efector flow-sensing device, the secondary (optional) field device for proof of flow
connects from 1X1-6 to 1K27-4 (binary input; normally open, closure with flow). Remove factory jumper when used.
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