27
•
Profile A provides only an OFF delay of 1 minute at 100% of
the cooling demand airflow.
100% CFM
1 min
100% CFM
Cooling
Demand
OFF OFF
• Profile B ramps up to full cooling demand airflow by first
stepping up to 50% of the full demand for 30 seconds. The
motor then ramps to 100% of the required airflow. A 1
minute OFF delay at 100% of the cooling airflow.
OFF
100% C FM
Cooling Dem and
100% C FM
1 m in
50% CFM
OFF
½ min
•
Profile C ramps up to 82% of the full cooling demand airflow
and operates there for approximately 7 ½ minutes. The
motor then steps up to the full demand airflow. Profile C
also has a 1 minute/100% OFF delay.
100% CFM
100% CFM
1 min
82% CFM
Cooling Demand
7 ½ min
OFF
OFF
•
Profile D ramps up to 50% of the demand for ½ minute,
then ramps to 82% of the full cooling demand airflow and
operates there for approximately 7 ½ minutes. The motor
then steps up to the full demand airflow. Profile D has a 1/
2 minute at 50% airflow OFF delay.
100% CFM
50% CFM
½
min
82% CFM
Cooling Demand
7 ½ min
OFF
OFF
50% CFM
½ min
Ramping Profiles
(*indicates factory setting)
8 7 6 5 4 3 2 1
O
F
F
O
F
F
8 7 6 5 4 3 2 1
O
F
F
8 7 6 5 4 3 2 1
O
F
F
8 7 6 5 4 3 2 1
*
O
N
O
N
O
N
O
N
Ramping
Profile
Tap A
Ramping
Profile
Tap B
Ramping
Profile
Tap C
Ramping
Profile
Tap D
6. Select the heating speed from the heating speed chart in
the Product Data Book applicable for your model*. The
adjust setting (already established by the cooling speed
selection) determines which set of speeds are available.
The selected speed must provide a temperature rise within
the rise range listed with the particular model.
Example:
The 70 kBtu is set for 990 CFM on cooling,
the “ADJUST” is set to “-” (minus). The four heating speeds
available are “A Minus”, “B Minus”, “C Minus”, and “D Minus”.
“B Minus” has a rise of 56
°
F for both stages which is within
the 30-60°F rise range for the 70 kBtu. This setting will
keep electrical consumption to a minimum. Set the “Heat”
speed DIP switches to “A”.
7. Select the desired “heating” speed tap by positioning
switches 7 and 8 appropriately. Refer to figure above. Turn
off power to furnace for a minimum of 10 seconds, allowing
motor to reset and recognize new speed selection. Turn
on power to furnace. Verify selected CFM by counting the
green CFM LED blinks.
In general lower heating speeds will: reduce electrical
consumption, lower operating sound levels of the blower, and
increase the outlet air temperature delivered to the home. The
speeds available allow the blower performance to be optimized
for the particular homeowner’s needs.
O
F
F
O
F
F
8 7
4 3 2 1
O
F
F
O
N
4 3 2 1
O
N
O
F
F
4 3 2 1
O
N
O
N
4 3 2 1
Cooling
Speed
Tap A
Cooling
Speed
Tap B
Cooling
Speed
Tap C
Cooling
Speed
Tap D
*
Cooling Speed Taps
(
*
indicates factory setting)
O
F
F
O
F
F
8
7
4 3 2 1
O
F
F
O
N
8 7
4 3 2 1
O
N
O
F
F
8 7
4 3 2 1
O
N
O
N
8
7
4 3 2 1
Heating
Speed
Tap A
Heating
Speed
Tap B
Heating
Speed
Tap C
Heating
Speed
Tap D
Heating Speed Taps
(
*
indicates factory setting)
*
O
F
F
O
F
F
8 7
4 3 2 1
O
F
F
O
N
8 7
4 3 2 1
8
4
7
3 2 1
Normal
+ (Plus)
Adjust
- (Minus)
Adjust
Adjust Taps
(
*
indicates factory setting)
*
8 7
8 7
8
7
O
N
O
F
F
A
DJUST
B
LOWER
H
EAT
O
FF
D
ELAY
The integrated control module provides a selectable heat off delay
function. The heat off delay period may be set to 90, 120, 150,180
seconds using the DIP switches or jumper provided on the control
module. The delay is factory shipped at 150 seconds but may be
changed to suit the installation requirements and/or homeowner
preference. Refer to the following figures for switch positions and
corresponding delay times.
Heat O ff
Delay
90 S econds
ON
ON
1
2
3
Heat O ff
Delay
120 S econds
Heat O ff
Delay
150 S econds
Heat O ff
Delay
180 S econds
ON
OFF
1
2
3
ON
1
2
3
1
2
3
OFF
OFF
H ea t Off D ela y
(* ind icate s fa ctory se ttin g)
*
OFF
Heat Off Delay
