Lennox G61MPV User Manual

Page 44
One revolution
ÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇ
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FIGURE 13
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
ÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇ
ÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇ
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ÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇ
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

Lennox G61MPV Specifications

General

Blower Type	Variable speed
Energy Star Certified	Yes
Gas Valve	Modulating
Fuel Type	Natural gas or propane
Ignition Type	Electronic
Heating Stages	2
Warranty	Limited Lifetime warranty on heat exchanger; 10-Year limited warranty on covered components
Heating Capacity	44, 000 to 132, 000 BTUH