IM 934-2 Applied PDAA/PDHA / Page 23 of 44
Compressor
Low Fan
t
O
n
O
ff
O
n
O
ff
30 secs.
30 secs.
8
mins.
4 mins.
t
Figure 31. Zone A
Compressor
Low Fan
1
2 mins.
O
n
O
ff
O
n
O
ff
*
t
t
*
= Zone Determination Time
Figure 32. Zone B
Figure 33. Zone C
Compressor
Low Fan
t
O
n
O
ff
O
n
O
ff
30 secs.
30 secs.
6
mins.
6
mins.
t
*
= Zone Determination Time
*
Figure 34. Zone D
Compressor
Fan
t
O
n
O
ff
O
n
O
ff
t
1
2 mins.
*
*
= Zone Determination Time
Cool Dry Mode
Select the Cool Dry Mode when the standard Cool
Mode does not provide sufficient dehumidification. In
Cool Dry Mode, the unit must run in Cool Mode for 12
minutes or until the temperature differential between
the room temperature and the set point is less than
2°F. This will also occur after a Cold Start or a Mode
change from Cool to Cool Dry. During this time, the
fan will operate in the Mode and Speed selected.
Until one or both of the above conditions are met,
the control will determine which Dry Mode (Zone) is
initiated based on the temperature differential between
the room temperature (Tr) and the temperature set
point (Ts):
Note: Cool Dry is not available with Sleep Function.
Figure 31. if Tr - Ts > 4°F, operation will be in Zone A
Figure 32. if 2°F < Tr - Ts < 4°F, operation will be in
Zone B
Figure 33. if 0°F < Ts - Ts < 2°F, operation will be in
Zone C
Figure 34. if Ts - Tr > 5°F, operation will be in Zone D
The other temperature ranges are dead bands for zone
stability.
