System Control Circuit Wiring (Field Wiring) - Trane CVHE Installation, Operation And Maintenance Manual

System Control Circuit Wiring (Field Wiring)

Table 17. Unit control panel wiring 120 Vac
Standard Control Circuits: Unit
Control Panel Control Wiring
(120 Vac)
Chilled Water Flow Proving Input
Condenser Water Flow Proving Input
Chilled Water Pump Relay Output
Condenser Water Pump Relay Output
Optional Control Circuits
(120 Vac)
Alarm Relay MAR (Non-Latching) Output
Limit Warning Relay Output
Alarm Relay MMR (Latching) Output
Compressor Running Relay Output
Maximum Capacity Relay Output
Head Relief Request Relay Output
Purge Alarm Relay Output
Ice Making Relay Output
Free Cooling Relay Output
Standard Low Voltage Circuits
(c)
(less than 30 Vac)
External Auto Stop Input
Emergency Stop Input
Optional Low Voltage Circuits
External Base Loading Enable Input
External Hot Water Control Enable Input
External Ice Machine Control Enable Input
External Free Cooling Input Enable Input
% RLA Compressor Output
External Condenser Pressure Output
Evaporator/Condenser Differential Pressure
Output
Condenser Head Pressure Control
External Current Limit Setpoint Input
External Chilled Water Setpoint Input
External Base Loading Setpoint Input
Generic Refrigerant Monitor input
Outdoor Air Temperature sensor
Tracer Comm Interface or LonTalk
BACnet or MODBUS
Note: All wiring to be in accordance with National Electrical Codes and any local codes
(a) If the Chilled Water Flow Proving Input is a factory-installed ifm efector flow-sensing device, the secondary field device (recommended with 38°F [3.3°C]
and lower leaving chilled water temperatures) for proof of flow connects from 1X1-5 to 1K26-4 (binary input; normally open, closure with flow). Remove
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.
(c) Standard low-voltage circuits (less than 30 Vac) must be separated from 120 Vac or higher wiring.
CVHE-SVX02H-EN
Unit Control Terminations
(a)
1X1-5 to 1A6-J3-2
(b)
1X1-6 to 1A6-J2-2
1A5-J2-4 to 6
1A5-J2-1 to 3
Note: Defaults are factory programmed, alternates can be selected at start-up using the service tool.
1A8-J2-1 to 3
1A8-J2-4 to 6
1A8-J2-7 to 9
1A8-J2-10 to 12
1A9-J2-1 to 3
1A9-J2-4 to 6
1A9-J2-7 to 9
1A5-J2-10 to 12
1A11-J2-4 to 6
Unit Control Panel
Terminations
1A13-J2-1 to 2
1A13-J2-3 to 4
1A18-J2-1 to 2
1A18-J2-3 to 4
1A19-J2-1 to 2
1A20-J2-1 to 2
1A15-J2-1 to 3
1A15-J2-4 to 6
1A15-J2-4 to 6
1A15-J2-4 to 6
1A16-J2-2 to 3
1A16-J2-5 to 6
1A17-J2-2 to 3
1A17-J2-5 to 6
IPC bus Connection and sensor
-J2-1(+) to 2(-)
-J2-3(+) to 4(-)
1A22, 5(+) to 6(-)
Input or Output Type
Binary Input
Binary Input
Binary Output
Binary Output
Binary Output
Binary Output
Binary Output
Binary Output
Binary Output
Binary Output
Binary Output
Binary Output
Binary Output
Input or Output Type
Binary Input
Binary Input
Binary Input
Binary Input
Binary Input
Binary Input
Analog Output
Analog Output
Analog Output
Analog Output
Analog Input
Analog Input
Analog Input
Analog Input
Communication and sensor
Communication to Tracer
or LonTalk
Communication to BACnet or
MODBUS
Contacts
Normally Open, closure
with flow
Normally Open, closure
with flow
Normally Open
Normally Open
Normally Open
Normally Open
Normally Open
Normally Open
Normally Open
Normally Open
Normally Open
Normally Open
Normally Open
Contacts
Closure required for
normal operation
Closure required for
normal operation
Normally Open
Normally Open
Normally Open
Normally Open
2–10 Vdc
2–10 Vdc
2–10 Vdc
2–10 Vdc
2–10 Vdc, or 4–20 mA
2–10 Vdc, or 4–20 mA
2–10 Vdc, or 4–20 mA
2–10 Vdc, or 4–20 mA
(as ordered, see sales
order)
(as ordered, see sales
order)
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