Heating - Dual Fuel - 4 Stage (2 Compressor / 2 Backup) - Lennox ComfortSense 7500 Installation And Setup Manual

H/C
Stages
Locked =
NO
4th stage
ON
Stg4 Differential
H/C
Stages
Locked =
YES
4th stage
Stg4 Diff.
ON
SET­
POINTS: SP -3.5 SP -3.0
Figure 21. Heating - dual fuel - 4 stage (2 compressor / 2 backup)
2nd stage
3rd stage
ON
Stg3 Differential
2nd stage
3rd stage
ON
Stg3 Differential
SP -2.5 SP -2.0
1st stage
ON
Stg2 Differential
1st stage
ON
Stg2 Differential
SP -1.5 SP -1.0
33
ON
Stg1 Differential
2nd stage
OFF
4th stage
OFF
ON
Stg1 Differential
SP -0.5 SP
1st stage
OFF
3rd stage
OFF
1st stage
OFF
2nd stage
OFF
3rd stage
OFF
4th stage
OFF
SP +0.5