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Step 5: Set the SMC55-HWQS Advanced Parameters to Modify the
Functionality of the HVAC System
Parameters Applicable to Conventional and Heat Pump Systems
(74A) Heat Stage 1 – On Delta
Use this parameter to identify the temperature below the heat setpoint when Heat Stage 1 should turn on. Refer to the control
diagrams in Appendix A. These diagrams graphically represent the Heat Stage 1-On Delta for Conventional and Heat Pump
systems.
(75A) Heat Stage 1 – Off Delta
Use this parameter to identify the temperature above the heat setpoint when Heat Stage 1 should turn off. Refer to the control
diagrams in Appendix A. These diagrams graphically represent the Heat Stage 1-Off Delta for Conventional and Heat Pump
systems.
(76A) Heat Stage 2 (Y
/W
2
Use this parameter to identify the temperature below the heat setpoint when Heat Stage 2 should turn on. Refer to the control
diagrams in Appendix A. These diagrams graphically represent the Heat Stage 2-On Delta for Conventional and Heat Pump
systems.
(77A) Heat Stage 2 – Off Delta
Use this parameter to identify the temperature above the heat setpoint when Heat Stage 2 should turn off. Refer to the control
diagrams in Appendix A. These diagrams graphically represent the Heat Stage 2-Off Delta for Conventional and Heat Pump
systems.
(78A) Heat Stage 3 (Aux) – On Delta
Use this parameter to identify the temperature below the heat setpoint when Heat Stage 3 (Aux) should turn on. Refer to the
control diagrams in Appendix A. These diagrams graphically represent the Heat Stage 3-On Delta for Conventional and Heat
Pump systems.
(79A) Heat Stage 3 (Aux) – Off Delta
Use this parameter to identify the temperature above the heat setpoint when Heat Stage 3 (Aux) should turn off. Refer to the
control diagrams in Appendix A. These diagrams graphically represent the Heat Stage 3-Off Delta for Conventional and Heat
Pump systems.
(80A) Cool Stage 1 – On Delta
Use this parameter to identify the temperature above the cool setpoint when Cool Stage 1 should turn on. Refer to the control
diagrams in Appendix A. These diagrams graphically represent the Cool Stage 1-On Delta for Conventional and Heat Pump
systems.
(81A) Cool Stage 1 – Off Delta
Use this parameter to identify the temperature below the cool setpoint when Cool Stage 1 should turn off. Refer to the control
diagrams in Appendix A. These diagrams graphically represent the Cool Stage 1-Off Delta for Conventional and Heat Pump
systems.
(82A) Cool Stage 2 – On Delta
Use this parameter to identify the temperature above the cool setpoint when Cool Stage 2 should turn on. Refer to the control
diagrams in Appendix A. These diagrams graphically represent the Cool Stage 2-On Delta for Conventional and Heat Pump
systems.
Included with SMC55-HWQS version 7420 or newer, SMC55-RESI version 7302 or newer and HomeWorks Palladiom Thermostat version 1.10 or newer.
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/Aux) – On Delta
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2
1
1
1
1
1
1
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P/N 032498h
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