Page 10
D – Blower Speed Taps
Blower speed tap selection is accomplished by chang-
ing the taps at the harness connector at the blower mo-
tor. Disconnect harness connector from motor to ex-
pose speed selectors. Blower speed selections are
listed in table 8.
To Change Blower Speed:
1 – Turn off electric power to furnace.
2 – Remove upper access panel and filter access door.
See figure 1.
3 – Lift left side filter over left support angle. For easy
handling, hold filter at center bottom.
4 – Rotate filter sideways and pull it through the blow-
er access panel opening.
5 – Pull the second filter out the same way as the first.
6 – Grasp blower motor harness connector located on
back on motor. Depress lock tab and pull connector
from motor.
7 – Pull harness connector and wires through blower
access panel opening.
8 – Select desired speeds for heating and cooling.
(Red = heating, Black = cooling, White = common).
See table 8.
BLOWER SPEED SELECTION
G20RQ3/4(X)E–100
G20RQ2/3(X)E–50*
G20RQ3(X)E–75
G20RQ5(X)E–100
G20RQ3(X)E–125
G20RQ4/5(X)E–125
G20RQ4/5(X)E–150
G20RQ4(X)E–75
UNIT
Factory Con-
nected
Speed Taps
Motor Speeds
Available
Cool
Heat
2
4
4
2
5
4
2
4
4
2
4
4
2
4
4
3
6
5
3
6
5
3
6
5
*DO NOT USE LOW SPEED TAP ON Q2/3–50
BLOWER SPEED SELECTION
HI
LOW
2
3
4
5
2
3
4
5
6
SPEED
TAPS
4
5
TABLE 8
◊
◊
◊
MOTOR PLUG SPEED TAP DESIGNATION
9 – Depress harness connector tab to release wire ter-
minal. Select connector location for new speed (re-
fer to unit wiring diagram). Insert wire terminal un-
til it is securely in place. See figure 14.
10 – Replace harness connector to motor .
FIGURE 14
BLOWER SPEED TAP SELECTION
HARNESS
CONNECTOR
MOTOR
DEPRESS TAB TO RELEASE
WIRE TERMINAL. SELECT
CONNECTOR LOCATION
FOR NEW SPEED (REFER TO
UNIT WIRING DIAGRAM).
INSERT WIRE UNTIL IT IS SE-
CURELY IN PLACE.
E – Fan Timings
Fan “off” timings (time that the blower operates after
the heat demand has been satisfied) are determined by
the arrangement of a jumper across pins on the BCC2-2
blower control board. See figure 3. To adjust fan “off ”
timings, gently disconnect jumper and re-position
across pins corresponding with new timing. Fan “on”
time is factory set at 45 seconds and is not adjustable.
WARNING
Shock hazard.
Make sure to disconnect power before changing
fan “OFF” timings.
Can cause personal injury.
