About Advanced Features & Operation
MEMORY BACKUP - In the event of a power loss, the thermostat will retain the stored program settings without external power or batteries.
2 STAGE OPERATION - The 2nd Stage of heat is turned on when (1) the 1st Stage has been on for a minimum of two minutes, and (2) the temperature spread from the setpoint is equal to or greater than: the setpoint plus the deadband, plus 2 degrees.
Heating | Cooling |
2 degrees
Dead Band
Dead Band
2nd Stage | 1st Stage | Heat | Cool | 1st Stage |
turn on | turn on | Setpoint | Setpoint | turn on |
MINIMUM HEAT/COOL SETPOINT DIFFERENCE - The Heat and Cool setpoints will not be allowed to come any closer to each other than the value set in Advanced Setup step
#6, on page 12. This minimum difference is enforced during Auto changeover and Program On operation.
ELECTRIC HEAT - Selecting Electric Heat on, page 11, step # 4, will cause the thermostat to turn on the fan immediately any time there is a heat demand. Since all gas furnaces control the fan, this feature should be off unless the heater is only electric.
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