Lennox G61MPV Service Manual page 108

C−Indoor Blower Motor
120V to the motor must not be interrupted. All connections for check out will be from 24VAC to
REMOVE PLUG FROM BOARD
If transformer T1 is used, double check all wiring connections before placing unit back in operation.
C
LOW
R
COOL
SPEED
1 Disconnect power to unit.
2 Disconnect plug J46 from P46 located on the blower control
board.
3 Connect voltage source as shown above.
4 Turn on power to unit. Blower should operate at low cool
speed.
C
R
LOW
HEAT
SPEED
8 Disconnect power to unit.
9 Connect voltage source as shown above.
10 Turn on power to unit. Blower should operate at low heat speed.
16X4W
16 pin connector
TWO STAGE VARIABLE SPEED CONTROL
WITH GenTeq MOTOR OR EMERSON MOTOR
plug J46, after disconnecting from blower control board.
1
J46
J46
TWO STAGE VARIABLE SPEED CONTROL
WITH EMERSON MOTOR ONLY
1 Disconnect power to unit.
2 Disconnect 16 pin connector cable from the 16X4W.
3 Turn on power to unit..
4 Verify 24VAC between pins 1 and 12 using a multimeter.
16
C
HIGH
COOL
SPEED
5 Disconnect power to unit.
6 Connect voltage source as shown above.
7 Turn on power to unit. Blower should operate at high cool speed.
C
HIGH
HEAT
SPEED
11 Disconnect power to unit.
12 Connect voltage source as shown above.
13 Turn on power to unit. Blower should operate at high heat speed.
pin 1
Page 108
R
J46
R
J46
pin 12