34
•
Set the S2-3 and S2-4 dip switches for the
Blower Off Delay.
BLOWER
OFF
DELAY
S2
‐
3
S2
‐
4
1.5m
@
100%
OFF
OFF
NO
DELAY
OFF
ON
3m
@
50%
ON
OFF
ENHANCED
ON
ON
AIRFLOW
MODE
S2
‐
5
*TORQUE
OFF
CONSTANT
CFM
ON
•
Set the S2-5 dip switch for the airflow mode.
OFF
OFF
50%
80%
100% if necessary
50%
Dehumidify
Fast Coil Cooling
Efficiency
7.5
minutes
3
minutes
1
minute
FAN OPERATION (CFM)
COMPRESSOR OPERATION ON
OFF
as required
Indoor Blower Timing
This ENHANCED MODE selection provides a
ramping up and ramping down of the blower
speed to provide improved comfort, quietness,
and potential energy savings. The graph on the
right shows the ramping process.
Enhanced Mode works in cooling, HP, heating,
Torque, and constant CFM modes.
Airflow Control (AFC)
* All zoning applications MUST be set to Constant CFM mode.
* Torque mode is optional and is recommended for high static
applications. High static conditions dramatically increase energy
consumption with variable speed motors. Evaluate the blower
performance table in relationship to the duct system to determine
the benefit of each installation.
* For the 2 ton air handler, torque mode will reduce airflow when
static is above approximately 0.3" water column.
* For the 2-1/2, 3, and 3-1/2 ton air handlers, torque mode will
reduce airflow when static is above approximately 0.35” water
column.
* For the 4 and 5 ton air handlers, torque mode will reduce airflow
when static is above approximately 0.4” water column.
When selected, Torque Mode is used for cooling operation only.
All heating modes default to constant CFM.
1
1
12
34
5
12
34
5
HP
2 (Compressor)
2 (Stages)
AC (System)
}
OUTDOOR
Capacity (Tons)
OUTDOOR
}
Torque
CFM/Ton
Cool Off Delay
}
INDOOR
CFM
+12V
R13
R14
R1
R4
1
U1
R NET 1
S1
on
on
S2
R NET 2
R
6
C2
2
C1
9
C
15
C
12
C1
8
C2
1
C10
D9
L1
R22