McQuay WGS190AW User Manual

OM WGS-5 WGS 130A to 190A 31
Table 8, Low Evaporator Pressure Inhibit
Mode Range
Unit Mode = Cool 30 to 45 Psig
Unit Mode = Cool w/Glycol, Ice w/ Glycol 15 to 45 Psig
Table 9, Low Evaporator Pressure Unload
Mode Range
Unit Mode = Cool 28 to 45 Psig
Unit Mode = Cool w/Glycol, Ice w/ Glycol 15 to 45 Psig
Circuit Controller
Circuit Inputs and Outputs
Table 10, Analog Inputs
# Description Signal Source Range
1 Evaporator Pressure 0.1 to 0.9 VDC 0 to 132 psi
2 Condenser Pressure 0.1 to 0.9 VDC 3.6to 410 psi
3 Open
4 Suction Temperature NTC Thermister (10k@25°C) -58 to 212°F
5 Discharge Temperature NTC Thermister (10k@25°C) -58 to 212°F
6 Open
7 Slide Load Indicator 4 to 20 mA 0 to 100%
8 Condenser LWT (circuit 1, water cooled only) NTC Thermister (10k@25°C) -58 to 212°F
Table 11, Analog Outputs
# Description Output Signal Range
1 Fan VFD (air cooled only) 0 to 10 VDC 0 to 100% (1000 steps resolution)
2 Open
3 EXV Driver 0 to 10 VDC 0 to 6386 steps (1000 steps resolution)
4 Open
Table 12, Digital Inputs
# Description Signal Signal
1 Circuit Switch 0 VAC (Off) 24 VAC (Auto)
2 Open
3 Open
4 VFD Fault 0 VAC (Fault) 24 VAC (No Fault)
5 Oil Differential Pressure Switch 0 VAC (Fault) 24 VAC (No Fault)
6 Mechanical High Pressure Switch 0 VAC (Fault) 24 VAC (No Fault)
7 Open
8 Open
9 Oil Level Sensor 0 VAC (Fault) 24 VAC (No Fault)
10-14 Open
The status of digital inputs may be viewed on Circuit Status screen 5, on the circuit
controllers only.

McQuay WGS190AW Specifications

General

Brand	McQuay
Model	WGS190AW
Category	Chiller
Language	English