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PRODUCT DESIGN
Select the desired "adjust" tap by positioning switches
3 and 4 appropriately. To enable adjustments and se-
lect -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 posi-
tions and their corresponding taps. Verify CFM by not-
ing the number displayed on the dual 7-segment LED
display.
6. The multi-speed circulator blower also offers several cus-
tom ON/OFF ramping profiles. These profiles may be
used to enhance cooling performance and increase com-
fort 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 bul-
let points below for a description of each ramping pro-
file. Verify CFM by noting the number displayed on the
dual 7-segment LED display.
Switch Bank: S4
Ramping
Profiles
A*
B
C
D
(*Indicates factory setting)
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 GMVC80604B 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 GMVC80604B. This setting
will keep electrical consumption to a mini-
mum. Set the "Heat" speed DIP switches
to "A".
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.
DIP Switch No.
1
2
OFF
OFF
ON
OFF
OFF
ON
ON
ON
Sw itch Ba nk: S4
Heating
CFM
A
B*
C
D
(*Indicates factory setting)
PCBKF103 / PCBKF104 / PCBKF105
•
Profile A provides only an OFF delay of one (1) minute
at 100% of the cooling demand airflow.
100% CFM
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.
100% CFM
50% CFM
OFF
1/2 min
•
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
airflow. Profile C also has a one (1) minute 100% OFF
delay.
OFF
S3
Add 5%
Minus 5%
Trim Amount
Add 10%
Minus10%
DIP Switch No.
3
4
OFF
OFF
ON
OFF
OFF
ON
ON
ON
100% CFM
OFF
1 min
100% CFM
OFF
1 min
100% CFM
OFF
SWITCH
3
4
OF F
OFF
ON
OFF
OF F
O N
ON
O N
37
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