Unit installation

IOMM ACZ/AGZ-3 ACZ / AGZ-BM 61
Automatic Adjusted Ranges
The following are setpoints that will be limited based on the option selected.
Evaporator Leaving Water Temperature
Mode Range
Unit Mode = Cool
40 to 60
°F
Unit Mode = Cool w/Glycol
20 to 60
°F
Evaporator Freeze Temperature
Mode Range
Unit Mode = Cool
37 to 42
°F
Unit Mode = Cool w/Glycol,
Ice w/Glycol
18 to 42
°F
Low Evaporator Pressure Hold and Unload
Mode Range
Unit Mode = Cool 55 to 65 Psig
Unit Mode = Cool w/Glycol,
Ice w/Glycol
31 to 65 Psig
Low Ambient Lockout Temperature
VFD Range
VFD = N
35 – 60
°F
VFD = Y
-2 – 60
°F
Forced Fan 1,2,3
Number of Fans Range
4 1 – 2 fans
6 1 – 3 fans
8 1 – 4 fans
When the number of fans setting is changed, the forced fan setpoints will default to values as shown
in the above table.
Shutdown Alarms
Shutdown alarms (also know as “Stop Alarms” or “Safeties”) execute rapid compressor shutdown
and require manual reset. They are also logged in the Alarm Log.
The following table identifies each equipment shutdown alarm, gives the condition that causes the
alarm to occur, and states the action taken because of the alarm. If the alarm is auto-clearing, the
reset condition is shown below. Otherwise, the alarm is manually reset, requiring the operator to
clear the alarm. All shutdown alarms do the following while active:
• Appear in the active alarm menu
• Light the alarm signal on the controller
• Activate the alarm output NO1
• Log the alarm in the Alarm Log