McQuay WGS190AW User Manual

OM WGS-5 WGS 130A to 190A 29
Toggle: Setpoints that have two choices, such as ON and OFF are toggled between the two
settings using the Up or Down keys on the controller.
NOTE: in some software versions the terms “inhibit” and “hold” are used interchangeably.
Table 5, Unit Controller Setpoints
Description Default Range Type PW
Unit
Unit Enable OFF OFF, ON N O
Unit Mode Cool Cool, Ice, Test M O
Control source Switches Switches, Keypad, Network N O
Available Modes Cool
Cool, Cool w/Glycol, Cool/Ice
w/Glycol, ICE w/Glycol, TEST
N T
Cool LWT
44 F 30(40) to 60 F
N O
Ice LWT
25 F 20 to 38F
N O
Start Delta T
10 F 0 to 10 F
M O
Stop Delta T
1.5 F 0 to 3 F
M O
Stage Up Delta T
2 F 0 to 3 F
M O
Stage Down Delta T
1 F 0 to 3 F
M O
Max Pulldown
5 F/min 0.5-5.0 F /min
M M
Evap Recirc Timer 30 0 to 300 seconds N M
Evap Pump Select #1 Only #1 Only, #2 Only, Auto N M
Water-cooled Yes No, Yes N M
Cond Recirc Timer (water-
cooled only)
30 0 to 300 seconds N M
Cond Pump Select (water-
cooled only)
#1 Only #1 Only, #2 Only, Auto N M
LWT Reset Type NONE NONE, RETURN, 4-20mA, OAT N M
Max Reset
0 F 0 to 20 F
N M
Start Reset Delta T
10 F 0 to 20 F
N M
Soft Load Off Off, On N M
Begin Capacity Limit 40% 20-100% N M
Soft Load Ramp 20 min 1-60 minutes N M
Demand Limit Off Off, On N M
Low OAT Operation
(air-cooled only)
No No, Yes N M
Low Ambient Lockout (air
cooled only)
55 F -10(35) to 70 F
N M
Ice Time Delay 12 1-23 hours N M
Clear Ice Timer No No,Yes N M
Evap LWT sensor offset 0 -5.0 to 5.0 deg N M
Evap EWT sensor offset 0 -5.0 to 5.0 deg N M
Cond EWT/OAT sensor offset 0 -5.0 to 5.0 deg N M
Cond LWT sensor offset 0 -5.0 to 5.0 deg N M
Units
F/psi F/psi, C/kPa
N M
BAS Protocol Modbus BACnet, LonWorks, Modbus N M
Ident number 1 0-200 N M
Baud Rate 19200 1200,2400,4800,9600,19200 N M
Compressors
Sequence # Cir 1 1 1-2 M M
Sequence # Cir 2 1 1-2 M M
Max Comps ON 2 1-2 N M
Start-start timer 20 min 15-60 minutes M M
Stop-start timer 5 min 3-20 minutes M M
Pumpdown Pressure 25 psi 10 to 40 psi M M
Pumpdown Time Limit 120 sec 0 to 180 sec M M
Light Load Stg Dn Point 25% 20 to 50% M M
Continued next page.

McQuay WGS190AW Specifications

General

Brand	McQuay
Model	WGS190AW
Category	Chiller
Language	English