Unit installation

88 ACZ / AGZ-BM IOMM ACZ/AGZ-3
Set Comp Setpoints
SET COMP SPs (1)
# of Compressors =X
Stop-Start =XXmin
Start-Start =XXmin
This menu sets the anti-recycle timers. Stop-Start is the time required before starting a compressor
after it has stopped. Start-Start is the time required before starting a compressor after the last time it
has started. It is recommended that these default values not be changed.
SET COMP SPs (2)
InterStageUp=XXXsec
InterStageDn=XXXsec
Clear Cycle Tmrs =no
InterStageUp is the time delay since the last stage change before a compressor can stage on.
InterStageDn is the time delay since the last stage change before a compressor can stage off
normally (not by an alarm).
Limit Alarms
SET ALARM LMTS (1)
LowEvPrHold=XXXpsi
LowEvPrUnld=XXXpsi
The LowEvPrHold and LowEvPrUnld 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 ALARM LMTS (2)
Evap Freeze= XX.X°
°°
°F
EvapFlowProof=XXXsec
Evap Freeze (the unit freeze protection shutdown) is actually a stop alarm and shuts off the unit
when the LWT reaches 36°F. It is cleared by going to the CLEAR ALARM menu in the ACTIVE
ALARM hierarchy.
EvapFlowProof is a time delay on the flow switch trip that reduces nuisance low flow trips. The
default setting is 5 seconds.
SET ALARM LMTS (3)
HighCondPr = XXXpsi
HiCondStgDn = XXXpsi
HighCondPr (the unit high-discharge-pressure shutdown) is a stop alarm that shuts off the unit when
the discharge pressure reaches the setting. The default setting is 385 psi. The HiCondStDn is a limit
alarm that unloads the unit in an attempt to prevent total shutdown from the HighCondPr. The stage
down is set at 370 psi.