Heat Pump and Backup Heat Lockout Operation
Heat pump with outdoor temperature lockouts
Outdoor temperature lockouts are optional. See Installer Setup options (ISU 3120).
FOSSIL FUEL - BACKUP HEAT NOT ALLOWED TO RUN WITH HEAT PUMP
33-00462—05
ELECTRIC - BACKUP HEAT ALLOWED TO RUN WITH HEAT PUMP
HEAT PUMP ONLY
HEAT PUMP WITH BACKUP HEAT AS NEEDED*
BACKUP HEAT ONLY
* NO BACKUP HEAT UNLESS INDOOR TEMPERATURE DROPS TO SELECTED BACKUP HEAT DROOP SETTING,
OR BACKUP HEAT UPSTAGE TIMER EXPIRES. HEAT PUMP STAYS ON WHEN BACKUP HEAT TURNS ON.
HEAT PUMP ONLY
HEAT PUMP WITH BACKUP HEAT AS NEEDED*
BACKUP HEAT ONLY
* NO BACKUP HEAT UNLESS INDOOR TEMPERATURE DROPS TO SELECTED BACKUP HEAT DROOP SETTING,
OR BACKUP HEAT UPSTAGE TIMER EXPIRES. HEAT PUMP TURNS OFF WHEN BACKUP HEAT TURNS ON.
BACKUP HEAT LOCKOUT
COMPRESSOR LOCKOUT
BACKUP HEAT LOCKOUT
COMPRESSOR LOCKOUT
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M39068