Lennox G32V3-75 - Page 22

Page 22
TABLE 7
Field Wiring Applications (Continued)
Jumper Settings (See figure 29)
Thermostat
E20
Term. Strip
Y1 to Y2
W914 W951
Wiring Connections
2 Heat / 1 Cool TWO Yes Intact Intact
S1
T'STAT
CONTROL
TERM. STRIP
OUTDOOR
UNIT
FM21 Heat
Pump / 1 Cool
SINGLE Yes Intact Cut
CONTROL
TERM. STRIP
FM21
75VA, 24V
TRANSFORMER*
*Disconnect existing
furnace transformer
and replace with 75VA,
24V transformer if deĆ
frost option to be used.
NOTE - Wiring connecĆ
tions to outdoor unit and
thermostat made at
FM21 control board per
FM21 instructions.
NOTE -
Remove
Y1/Y2 jumper
for two-stage
cooling.
Harmony
Application*
2 Heat / 1 Cool
TWO Yes Cut Intact
TEMP.
MOD.
SWITCH
CONTROL
TERM.
STRIP
OUTĆ
DOOR
UNIT
HARMONY
FAN LINE
FAN LO
Harmony
Application*
2 Heat / 2 Cool
TWO No Cut Intact
TEMP.
MOD.
SWITCH
CONTROL
TERM.
STRIP
OUTĆ
DOOR
UNIT
HARMONY
FAN LINE
FAN LO
*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.