Lennox CS7500 Installation And Setup Manual page 21

H/C
Stages
Locked =
NO
3rd stage
ON
H/C
Stages
Locked =
YES
SP -3.5 SP -3.0
POINTS:
Figure 13. Heating - Dual Fuel - 3 Stage (1 Compressor / 2 Backup)
H/C
Stages
Locked =
NO
H/C
Stages
Locked =
YES
POINTS: SP -3.5 SP -3.0
Figure 14. Heating - Dual Fuel - 3 Stage (2 Compressor / 1 Backup)
2nd stage
ON
Stg3 Differential
2nd stage
ON
3rd stage
Stg3 Diff.
ON
SP -2.5 SP -2.0
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 SP -0.5
1st stage
ON
ON
Stg2 Differential
1st stage
ON
ON
Stg2 Differential
SP -1.5 SP -1.0
21
Stg1 Differential
3rd stage
OFF
Stg1 Differential
SP +0.5
SP
Stg1 Differential
2nd stage
OFF
Stg1 Differential
SP
SP -0.5 SP +0.5
1st stage
OFF
2nd stage
OFF
1st stage
OFF
2nd stage
OFF
3rd stage
OFF
1st stage
OFF
3rd stage
OFF
1st stage
OFF
2nd stage
OFF
3rd stage
OFF