Lennox Harmony II Zone Control System

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FM21
Heat Pump Control
DTR1 Kit
(Optional)
SLC1 Kit
(Optional)
Outdoor
Thermostat
Indoor Unit
Outdoor Unit
NOTE-N.C. denotes wires that are not connected.
W2
Remove Jumper
TEMP MODULE SWITCH
Fan line
Fan low
G32V ONLY*
*G32V only: remove pin #3 of the J73 terminal of the VSP control. Remove the factory jumper between Y1 & DS at the terminal strip
HP 3 HP 2 HP 1 G2 1V
or Gas
Option 3 − Harmony Zone Control Center Field Wiring with
G32V/G21V/GSR21V Furnace, Lennox Heat Pump, and FM21 Control
Figure 25