Unit installation

IOMM ACZ1-2 ACZ 010A through 039A 47
SET FANS SETPOINTS
SET FANS SPs (1)
Fans Stages = X
Speedtrol = NO
The Fan Stages line tells the controller the number of fans on the unit. The UP ARROW
toggles between 1, 2, and 3. 1 is not used; 2 should be used for Models ACZ 010, 013, and
017; and 3 should be used for ACZ 020, 025, 029, and 039.
SpeedTrol tells the controller whether the optional SpeedTrol is installed in the unit. The
UP ARROW toggles between YES and NO. The setting changes the range available: YES
= 35°F to 60°F, with 35°F being the recommended setting; NO = -2°F to 60°F, with 0°F
being the recommended setting.
SET FANS SPs (2)
Stage ON psi
#1 #2 #3
XXX XXX XXX
SET FANS SPs (3)
Stage Off psi
#1 #2 #3
XXX XXX XXX
These two menus set the on and off staging pressures for the fans. The third fan is for only
for three-fan units. These settings are used with both FanTrol and SpeedTrol. SpeedTrol
takes effect when the last fan is running after FanTrol cycles off the others. Fan #1 is
staged by condensing pressure and does not or stop start automatically when the unit does.
Screen Definitions – TEST
The test screens are only available when the unit is in TEST mode. Using these screens,
any digital output can be controlled manually.
TEST UNIT (1)
Alarm Signal= OFF
Evap Fan=OFF
TEST UNIT (2)
Liquid Line Sol=OFF
Compressor #1 = OFF
Compressor #2 = OFF
TEST UNIT (3)
Fan Motor #1 = OFF
Fan Motor #2 = OFF
Fan Motor #3 = OFF