Lennox G21Q Series Unit Information

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FIGURE 36
HIGH SPEED COOL
(output from controller to motor windings)
MOTOR SPEED CONTROL WITH
D.C. PULSEWIDTH MODULATION
WINDING #1
WINDING #2
WINDING #3
LOW SPEED HEAT/COOL
(output from controller to motor windings)
HIGH SPEED HEAT
(output from controller to motor windings)
O volts
325VDC
One revolution
O volts
325VDC
O volts
325VDC
WINDING #1
WINDING #2
WINDING #3
O volts
325VDC
O volts
325VDC
O volts
325VDC
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WINDING #1
WINDING #2
WINDING #3
O volts
325VDC
O volts
325VDC
O volts
325VDC
Motor speed is determined by the size of the electrical pulse sent to the
motor windings. The longer the pulse, the faster the motor.
One
Pulse
ÇÇ
ÇÇ
ON PULSE
OFF PULSE
ÇÇ
ÇÇ
WINDINGS TURNED OFF
The frequency of the pulses to the windings is 20KHz.
DO NOT ATTEMPT TO MEASURE THESE VOLTAGES.
WINDINGS TURNED ON
OUTPUT FROM CONTROLLER TO MOTOR WINDINGS
One revolution
One revolution

Lennox G21Q Series Specifications

General

Brand	Lennox
Model	G21Q Series
Category	Industrial Equipment
Language	English