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ACC-APG001A-EN
Appendix A
Supply Fan
Multi-Speed/VFD
Table 10. Multi-speed minimum supply fan speeds
Unit Operation Supply Fan Speed
Off
0%
Fan Only 41.7%
Cooling Stage 1 41.7%
Cooling Stage 2 100%
Heat Pump Heating 100%
Electric/Auxiliary Heating 100%
Variable Speed/VFD
Table 11. Variable speed minimum supply fan speeds
Unit Operation Supply Fan Speed
Off 0%
Fan Only 58%
Cooling Stage 1 58%
Cooling Stage 2 80%
Heat Pump Heating 100%
Electric/Auxiliary Heating 100%
Compressor Staging
Thermostat Staging
For equipment staging response to a conventional thermostat signals, refer to the Conventional
Thermostat sequence of operation above.
Cooling Only (Electric Heat) – CVZT & VVZT
Table 12. Single compressor cooling staging
Unit Operation Unit Response
Cooling Stage 1 Compressor 1 Output ON
Table 13. Dual compressor cooling staging (manifold or independent)
Unit Operation Unit Response
Cooling Stage 1 Compressor 1 Output ON
Cooling Stage 2 Compressor 1 Output ON + Compressor 2
Output ON