McQuay AWS User Manual

20 KOMAC00607-09EN
Auto Adjusted Ranges
Some settings have different ranges of adjustment based on other settings.
Cool LWT 1 and Cool LWT 2
Available Mode Selection Range Imp. Range SI
Without Glycol 40 to 60
o
F 4 to 15 °C
With Glycol 25 to 60
o
F -4 to 15 °C
Evaporator Water Freeze
Available Mode Selection Range Imp. Range SI
Without Glycol 36 to 42
o
F 2 to 6 °C
With Glycol 0 to 42
o
F -18 to 6 °C
Low Evaporator Pressure - Hold
Available Mode Selection Range Imp. Range SI
Without Glycol 28 to 45
PSIG
195 to 310 kPa
With Glycol 0 to 45 PSIG 0 to 310 kPa
Low Evaporator Pressure - Unload
Available Mode Selection Range Imp. Range SI
Without Glycol 26 to 45 Psig 180 to 310 kPa
With Glycol 0 to 45 Psig 0 to 410 kPa
Low Ambient Lockout
Fan VFD Range Imp. Range SI
= no for all circuits 35 to 60
o
F 2 to 15 °C
= yes on any circuit -10 to 60
o
F -23 to 15 °C
Dynamic Default Values
The fan staging dead bands have different default values based on the VFD enable setpoint.
When the VFD enable setpoint is changed, a set of default values for the fan staging dead
bands is loaded as follows:
VFD is Enabled VFD is Disabled
Setpoint
Default
loaded (
o
F)
Setpoint
Default
loaded (
o
F)
Stage 1 On Deadband
8
Stage 2 On Deadband 5 Stage 2 On Deadband 10
Stage 3 On Deadband 8 Stage 3 On Deadband 11
Stage 4 On Deadband 10 Stage 4 On Deadband 12
Stage 5 On Deadband 8 Stage 5 On Deadband 13
Stage 6 On Deadband 8 Stage 6 On Deadband 13
Stage 7 On Deadband 8 Stage 7 On Deadband 13
Stage 8 On Deadband 8 Stage 8 On Deadband 13
Stage 2 Off Deadband 8 Stage 2 Off Deadband 20
Stage 3 Off Deadband 7 Stage 3 Off Deadband 16
Stage 4 Off Deadband 6 Stage 4 Off Deadband 11
Stage 5 Off Deadband 5 Stage 5 Off Deadband 8
Stage 6 Off Deadband 5 Stage 6 Off Deadband 8
Stage 7 Off Deadband 5 Stage 7 Off Deadband 8
Stage 8 Off Deadband 5 Stage 8 Off Deadband 8

McQuay AWS Specifications

General

Brand	McQuay
Model	AWS
Category	Chiller
Language	English