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P/N 032498h
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Appendix A
1. Heat Stage Relays
This table indicates the relays that will be energized for each heat stage based on the system type.
Table 17:
System
Heat Stages
Auxiliary Heat
1st Heat Stage
2nd Heat Stage
3rd Heat Stage
Auxiliary Only
Heat Pump
1
1
None
Y
1
and G
2
None
Y
1
and G
Y
1
, Y
2
, and G
2
Electric
Y
1
and G
Y
1
, W
2
, and G
W
2
and G
2
Gas / Oil
Y
1
and G
W
2
and G
W
2
and G
3
Electric
Y
1
and G
Y
1
, Y
2
, and G
Y
1
, Y
2
, W
2
, and G
W
2
and G
3
Gas / Oil
Y
1
and G
Y
1
, Y
2
, and G
W
2
and G
W
2
and G
Conventional, thermostat
controlled heating fan
1
None
W
1
and G
2
None
W
1
and G
W
1
, W
2
, and G
Conventional, equipment
controlled heating fan
1
None
W
1
2
None
W
1
W
1
and W
2
2. Cool Stage Relays
This table indicates the relays that will be energized for each cool stage based on the system type.
Table 18:
System
Heat Stages
Auxiliary Heat
1st Heat Stage
Heat Pump
1
1
Y
1
, G, and O
2
Y
1
, G, and O
Y
1
, Y
2
, G, and O
Conventional
1
Y
1
and G
2
Y
1
and G
Y
1
, Y
2
, and G
1
Included with SMC55-HWQS version 7420 or newer, SMC55-RESI version 7302 or newer and HomeWorks Palladiom Thermostat version 1.10 or newer.