38
HDWA-SVX001D-EN
Table 13.
Unit control panel wiring 120 Vac
Standard Control Circuits: Unit
Control Panel Control Wiring
(120 Vac)
Unit Control Terminations
Input or Output Type
Contacts
Evaporator Water Flow Switch
1K11-J3-1 to 2
Binary Input
Normally Open, Closure with Flow
Condenser Water Flow Switch
1K11-J2-1 to 2
Binary Input
Normally Open, Closure with Flow
Evaporator Water Pump Control
1K12-J2-4 to 6
Binary Output
Normally Open
Condenser Water Pump Control
1K12-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.
Maximum Capacity Relay Output
1K14-J2-4
Binary Output
Normally Open
Head Relief Request Relay Output
J11-J2-4 to 6
Binary Output
Normally Open
Ice Building Indicator
1K15-J2-1 to 3
Binary Output
Normally Open
Standard Low Voltage Circuits
(Less than 30 Vac)
(a)
Unit Control Panel Terminations
Input or Output Type
Contacts
External Auto Stop Input
1K4-J2-1 to 2
Binary Input
Closure Required for Normal
Operation
Emergency Stop Input
1K4-J2-3 to 4
Binary Input
Closure Required for Normal
Operation
Optional Low Voltage Circuits
External Base Loading Enable Input
1k8-J2-2 to 3
Binary Input
Normally Open
External Hot Water Control Enable
Input
1k9-J2-3 to 4
Binary Input
Normally Open
External Ice Machine Control
Enable Input
1K3-J2-1 to 2
Binary Input
Normally Open
Condenser Refrigerant Pressure
1K7-J2-4 to 6
Analog Output
2–10 Vdc
Chiller % Capacity Output
1K7-J2-1 to 3
Analog Output
2–10 Vdc
Evaporator/Condenser Differential
Pressure Output
1K7-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
Input
1K6-J2-5 to 6
Analog Input
2–10 Vdc, or 4–20 mA
External Base Loading Setpoint
Input
1K8-J2-2 to 3
Analog Input
2–10 Vdc, or 4–20 mA
Generic Refrigerant Monitor Input
1K8-J2-5 to 6
Analog Input
2–10 Vdc, or 4–20 mA
Outdoor Air Temperature Sensor
Inter-processor Communication
(IPC) Bus Connection and Sensor—
4BT9
Communication and Sensor
Trace Comm Interface or LonTalk
1K5-J2-1(+) to 2(-)
1K5-J2-3(+) to 4(-)
Communication to Tracer
or LonTalk
(As Ordered; See Sales Order)
BACnet or MODBUS
1K20 5(+) to 6(-)
Communication to BACnet or
MODBUS
(As Ordered; See Sales Order)
Tracer SC Module
1K21
Communication to Tracer SC
Module
Note:
All wiring to be in accordance with National Electrical Code (NEC) and any local codes.
(a)
Standard low-voltage circuits (less than 30 Vac) must be separated from 120 Vac or higher wiring.
Sensor Circuits
All sensors are factory-installed except the optional
outdoor air temperature sensor (refer to the following
figure for sensor locations). This sensor is required for
the outdoor air temperature type of chilled water reset.
Use the following guidelines to locate and mount the
outdoor air temperature sensor. Mount the sensor
probe where needed; however, mount the sensor
module in the control panel.
