McQuay TGZ 040A

OMM TGZ-1 TGZ 040A through TGZ 190A 65
InterStageUp is the time delay since the last stage change before a compressor can stage on,
default is 120 sec.
InterStageDn is the time delay since the last stage change before a compressor can stage off
normally (not by an alarm). Default is 30 sec. It is recommended that these settings not be
changed.
# of Compressors = 4 # of Compressors = 6
SET COMP SPs (3)
Comp 1 = Enable
Comp 3 = Enable
# of Compressors = 4 # of Compressors = 6
SET COMP SPs (4)
Comp 2 = Enable
Comp 4 = Enable
Enable screens #3 and #4 require the manager password to change.
SET COMP SPs (5)
Expansion Valve
Type = Thermal
TGZ 040-120 have thermal expansion valves, TGZ 150-190 have electronic valves.
Expansion Valve Type = Electronic
SET COMP SPs (6)
Cir 1 EXV
EXV Control = Auto
Manual EXV Pos =
XXX.X
Expansion Valve Type = Electronic
SET COMP SPs (7)
Cir 2 EXV
EXV Control = Auto
Manual EXV Pos=XXX.X
SET ALARM LIMITS
SET ALARM LMTS (1)
Low EVAP Pressure
Hold=XXXpsi
Unload=XXXpsi
The Hold and Unload have the same default value of 59 psi. If two compressors are
running, the LowEvPrUnld is in effect and the lag compressor will be shut off to unload the
unit. If one compressor is running, the LowEvPrHold is in effect and the lag compressor is
prevented from starting, thereby holding the unit capacity.
SET COMP SPs (3)
Comp 1 = Enable
Comp 3 = Enable
Comp 5 = Enable
SET COMP SPs (4)
Comp 2 = Enable
Comp 4 = Enable
SET COMP SPs (4)
Comp 2 = Enable
Comp 4 = Enable
Comp 6 = Enable