MICRO-AIR ASY-356-X01, Operating Manual

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©2022 Micro-Air Corp March 21, 2022, revision 1.0
Auto Gas Changeover
Note: See section Auto Gas Changeover in section Initial Setup Instructions for enabling and disabling
this feature.
Auto Gas Changeover operation mirrors the OEM thermostat’s operation for additional stages of heat
when the thermostat determines more are needed. The three escalating stages are shown in Table 8 . All
three stages may not be available based on your system, but EasyTouch will output the same logic. Stage
2 heating is available in every system.
Staging Heat Source
Stage 1 Heat Pump
Stage 2 Furnace 1
Stage 3 Furnace 2
Table 8 - Heat Staging
Heat Pump and Auto Cool/Heat Pump Changeover Behavior
Table 9 shows how Auto Gas Changeover affects the Heat Pump operational modes when enabled.
Environment Operation
Inside 4° Or Less Below Setpoint Normal Heat Pump Operation (Stage 1)
Inside 5° Or 6° Below Setpoint Stage 1 and Stage 2 Run Until Setpoint is Satisfied
Inside 7° Or More Below Setpoint Stage 1, Stage 2, and Stage 3 Run Until Setpoint is Satisfied
or
Any Stage Runs 20 Minutes Stage Escalates to the Next Highest Available Stage
3 Cycles in a Row Call for Escalation Operates on Table 10 Behavior for Two Hours
Table 9 - Heat Pump AGC Operation
Note: Table 9 operation may be different based on the Gap settings. See section Temperature Gap
(Hysteresis) for details.
Furance and Auto Cool/Furnace Changeover Behavior
Table 10 shows how Auto Gas Changeover affects the Furnace operational modes when enabled.
Environment Operation
Inside 4° Or Less Below Setpoint Normal Furnace Operation (Stage 2) (Stage 1 Never Runs)
Inside 5° Or More Below Setpoint Stage 2 and Stage 3 Run Until Setpoint is Satisfied
or
Any Stage Runs 20 Minutes Stage Escalates to the Next Highest Available Stage
3 Cycles in a Row Call for Escalation Stage 2 and Stage 3 will Start Together for Next Two Hours
Table 10 - Furnace AGC Operation
Note: Table 10 operation may be different based on the Gap settings. See section Temperature Gap
(Hysteresis) for details.