McQuay AWS User Manual

KOMAC00607-09EN 17
Setpoints
The following parameters are remembered during power off, are factory set to the Default
value, and can be adjusted to any value in the Range column.
Read and write access to these set points is determined by the Global HMI (Human Machine
Interface) Standard Specification.
Table 1, Setpoint Value and Range
Description Default Range
Unit Ft/Lb SI
Manufacturing Location Not Selected Not Selected, Europe, USA
Unit Enable OFF OFF, ON
Unit Status after Power
Failure
OFF OFF, ON
Control source Local Local, Network
Available Modes Cool COOL
COOL/w GLYCOL
COOL/ICE w GLYCOL
ICE
TEST
Cool LWT 1
44 °F
7 °C
See section 0
Cool LWT 2
44 °F
7 °C See section 0
Ice LWT
25 °F
-4 °C
20 to 38°F / -8 to 4 °C
Startup Delta T
5 °F
2,7 °C
0 to 10 °F / 0 to 5 °C
Shut Down Delta T
2.7 °F
1.5 °C
0 to 3 °F / 0 to 1,7 °C
Stage Up Delta T (between
compressors)
2 °F
1 °C
0 to 3 °F / 0 to 1,7 °C
Stage Down Delta T
(between compressors)
1 °F
0,5 °C
0 to 3 °F / 0 to 1,7 °C
Max Pulldown
3 °F/min
1,7
°C/min
0.5-5.0 °F /min / 0,3 to 2,7 °C/min
Evap Recirc Timer 30 0 to 300 seconds
Evap Control #1 Only #1 Only, #2 Only, Auto,
#1 Primary, #2 Primary
LWT Reset Type NONE NONE, RETURN, 4-20mA, OAT
Max Reset
10 °F
5 °C
0 to 20 °F / 0 to 10 °C
Start Reset Delta T
10 °F
5 °C
0 to 20 °F / 0 to 10 °C
Start Reset OAT 75°F 23.8°C 50°F - 85°F / 10.0 – 29.4°C
Max Reset OAT 60°F 15.5°C 50°F - 85°F / 10.0 – 29.4°C
Soft Load Off Off, On
Begin Capacity Limit 40% 20-100%
Soft Load Ramp 20 min 1-60 minutes
Demand Limit Off Off, On
Current Limit Off Off, On
Current @ 20mA 800 Amp 0 to 2000 Amp = 4 to 20 mA
Current limit Set Point 800 Amp 0 to 2000 Amp
# of Circuits 2 2-3-4
Ice Time Delay 12 1-23 hours
Continued next page.

McQuay AWS Specifications

General

Brand	McQuay
Model	AWS
Category	Chiller
Language	English