IOMM ACZ1
ACZ 010A through 039A
41
SET ALARM LMTS (4)
PhaseVoltage=YES/NO
LowAmbientLock=XX
°°°°
F
LowAmbientLock prevents unit operation below the setting. If the unit is equipped with the standard
FanTrol pressure-activated control, the available range is 35
°
F to 60
°
F with a default of 35
°
F. With
the optional SpeedTrol variable speed control, the range becomes –2
°
F to 60
°
F with default of 0
°
F.
Input to line 3 of the next screen, SET FANS SP (1), informs the controller which type of control is
installed and which range of setting to allow.
SET FANS STAGES
SET FANS SPs (1)
Fans = 2
Speedtrol = NO
The Fans 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
150 290 310
SET FANS SPs (3)
Stage Off psi
#1 #2 #3
UNIT 170 180
These two menus set the on and off staging pressures for the fans. The left-hand two are for three-fan
units; the right-hand two are for two-fan units. The default values are shown in the boxes. These
settings are used with both FanTrol and SpeedTrol. SpeedTrol takes effect when the last fan is
running after FanTrol cycles off the others.
SET FANS SPs (2)
Stage ON psi
#1 #2
150 290
SET FANS SPs (3)
Stage Off psi
#1 #2
UNIT 170