PRODUCT DESIGN
33
8. Select the desired “heating” speed tap by positioning
switches S4- 3, 4 appropriately. Refer to figure above.
Verify CFM by noting the number displayed on the dual
7-segment LED display.
In general lower heating speeds will: reduce electrical con-
sumption, 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.
3
4
A
OFF
OFF
B *
ON
OFF
C
OFF
ON
D
ON
ON
(*Indicates factory s etting)
Sw itch Ba nk: S4
Heating
CFM
DIP S witch No.
PCBKF103 / PCBKF104 / PCBKF105
•
Profile A
provides only an OFF delay of one (1) minute
at 100% of the cooling demand airflow.
OFF
100% CFM
100% CFM
1 min
OFF
•
Profile B
ramps up to full cooling demand airflow by
first stepping up to 50% of the full demand for 30 sec-
onds. The motor then ramps to 100% of the required
airflow. A one (1) minute OFF delay at 100% of the
cooling airflow is provided.
50% CFM
1/2 min
100% CFM
100% CFM
1 min
OFF
OFF
•
Profile C
ramps up to 85% of the full cooling demand
airflow and operates there for approximately 7 1/2 min-
utes. The motor then steps up to the full demand air-
flow. Profile C also has a one (1) minute 100% OFF
delay.
100% CFM
OFF
OFF
4. Continuous fan speeds that provide 25, 50, 75 and 100%
of the furnace’s maximum airflow capability are select-
able via dip switches S5- 3, 4.
Example:
If the furnace’s maximum airflow capabil-
ity is 2000 CFM and 25% continuous fan
speed is selected, the continuous fan
speed will be 0.25 x 2000 CFM = 500 CFM.
5. Locate the blower speed selection DIP switches on
the integrated control module. Select the desired “cool-
ing” speed tap by positioning switches 1 and 2 appro-
priately. Select the desired “adjust” tap by positioning
switches 3 and 4 appropriately. To enable adjustments
and select -5, 5, -10 or 10% trim, you must set dipswitch
S5-2 to ON. If S5-2 is in the OFF position, you will
receive 0% trim. Refer to the following figure for switch
positions and their corresponding taps. Verify CFM by
noting the number displayed on the dual 7-segment
LED display.
6. The multi-speed circulator blower also offers several
custom ON/OFF ramping profiles. These profiles may
be used to enhance cooling performance and increase
comfort level. The ramping profiles are selected using
DIP switches S4- 1, 2. Refer to the following figure for
switch positions and their corresponding taps. Refer to
the bullet points below for a description of each ramp-
ing profile. Verify CFM by noting the number displayed
on the dual 7-segment LED display.
1
2
A*
OFF
OFF
B
ON
OFF
C
OFF
ON
D
ON
ON
Switch Bank: S4
DIP Switch No.
(*Indicates factory setting)
Ramping
Profiles
7. Select the heating speed for your model from the heat-
ing speed chart in the Specification Sheet. The adjust
setting (already established by the cooling speed se-
lection) 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:
If the DM80VC604B* is set for 1210 CFM
on cooling, the “ADJUST” is set to “+”
(plus). The four heating speeds available
are “A Plus”, “B Plus”, “C Plus”, and “D
Plus”. “A Plus” has a rise of 38
°
F for both
stages which is within the 20-50°F rise
range for the DM80VC604B*. This set-
ting will keep electrical consumption to a
minimum. Set the “Heat” speed DIP
switches to “A”.
