Lennox G32V Series Service Literature page 80

Thermostat Thermostat
E20
2 Heat / 1 Cool TWO
FM21 Heat SINGLE
Pump / 1 Cool
Harmony TWO
Application*
2 Heat / 1 Cool
Harmony TWO
Application*
2 Heat / 2 Cool
*Cut wires at pin positions 2 and 13 of J/P46. Insulate ends to prevent a short. Blower operates on PWM signal generated by Harmony. Harmony
overrides blower speed taps. Blower speed varies according to zone demand. Low and high−fire controlled by temperature modulating switch.
TABLE 37
Field Wiring Applications (Continued)
Jumper Settings (See figure 16)
W915 W914
Yes Intact
Yes Intact
Yes Cut
No Cut
Page 80
Wiring Connections Wiring Connections
W951
Intact
S1 CONTROL
T'STAT TERM. STRIP
Cut
*Disconnect existing
furnace transformer and
replace with 75VA, 24V
transformer if defrost
option to be used.
75VA, 24V
TRANSFORMER*
NOTE − Wiring connec-
tions to outdoor unit and
thermostat made at
FM21 control board per
FM21 instructions.
Intact
TEMP.
HARMONY
MOD.
SWITCH
FAN LO
FAN LINE
Intact
TEMP.
HARMONY
MOD.
SWITCH
FAN LO
FAN LINE
OUTDOOR
UNIT
CONTROL FM21
TERM. STRIP
NOTE −
Remove
Y1/Y2 jumper
for two−stage
cooling.
CONTROL OUT-
TERM. STRIP DOOR
UNIT
CONTROL OUT-
TERM. STRIP DOOR
UNIT