H/C
Stages
Locked =
NO
H/C
Stages
Locked =
YES
SET
SP -3.5
SP -3.0
POINTS:
Figure 20. Heating - dual fuel - 3 stage (2 compressor / 1 backup)
3rd stage
ON
Stg3 Differential
3rd stage
ON
Stg3 Differential
SP -2.5
SP -2.0
2nd stage
ON
Stg2 Differential
2nd stage
ON
Stg2 Differential
SP -1.5
SP -1.0
32
1st stage
ON
Stg1 Differential
1st stage
ON
Stg1 Differential
SP
SP -0.5
1st stage
OFF
2nd stage
OFF
3rd stage
OFF
1st stage
OFF
2nd stage
OFF
3rd stage
OFF
SP +0.5