McQuay WGS190AW User Manual

28 WGS 130A to 190A OM WGS-5
Unit Controller
Unit Inputs/Outputs
Table 1, Analog Inputs
# Description Signal Source Range
1
Condenser EWT or Outdoor
Ambient Temp.
Thermister (10k@25°C) -58 to 212°F
2
Demand Limit 4-20 mA Current 0 to 100% limit
3
Chilled Water Reset 4-20 mA Current
0 to 10 degrees
60F max.
4
Leaving Evaporator Water Temp. Thermister (10k@25°C) -58 to 212°F
5
Entering Evaporator Water Temp. Thermister (10k@25°C) -58 to 212°F
C1 = Refrigerant Circuit #1, C2 = Refrigerant Circuit #2, UT = Unit
Table 2, Analog Outputs
# Description Output Signal Range
1
Cooling Tower Bypass Valve Position 0 to 10 VDC 0 to 100%
2
Cooling Tower VFD Speed 0 to 10 VDC 0 to 100%
3
Open
4
Open
Table 3, Digital Inputs
# Description Signal Signal
1
Unit Switch 0 VAC (Stop) 24 VAC (On)
2
Remote Switch 0 VAC (Stop) 24 VAC (Start)
3
Evaporator Water Flow Switch 0 VAC (No Flow) 24 VAC (Flow)
4
Mode Switch 0 VAC (Cool) 24 VAC (Ice)
5
Condenser Water Flow Switch 0 VAC (No Flow) 24 VAC (Flow)
6
Open
7
Open
8
Open
Table 4, Digital Outputs
# Description Load Output OFF Output ON
1
Evaporator Water Pump 1 Pump Contactor Pump OFF Pump ON
2
Evaporator Water Pump 2 Pump Contactor Pump OFF Pump ON
3
Condenser Water Pump 1 Pump Contactor Pump OFF Pump ON
4
Condenser Water Pump 2 Pump Contactor Pump OFF Pump ON
5
Tower Fan 1 Fan Contactor Fan OFF Fan ON
6
Tower Fan 2 Fan Contactor Fan OFF Fan ON
7
Remote Run Status All Circuits Off Any Circuit On
8
Alarm Remote Alarm No alarm Stop alarm
Unit Setpoints
The following parameters are retained during power off, are factory set to the Default value,
and can be adjusted to any value in the Range column.
The Type defines whether the setpoint is part of a coordinated set of duplicate setpoints in
different controllers. Types are as follows:
N = Normal setpoint – Not copied from, or copied to, any other controller
M = Master setpoint – Setpoint is copied to all controllers in the “Sent To” column
The PW (password) column indicates the password level that must be active in order to
change the setpoint. Passwords are as follows:
O = Operator [0100] M = Manager (8745)

McQuay WGS190AW Specifications

General

Brand	McQuay
Model	WGS190AW
Category	Chiller
Language	English