SETTING THE SYSTEM MODE
Press MODE
button to change
system mode
System Modes
•
Off:
System is off. No heating or cooling will come on. If system was on, it will turn off immediately.
•
Heat:
Only heating will occur.
•
Cool:
Only cooling will occur.
•
Auto:
Heating or cooling will come on according to the heating and cooling setpoints. The system will
automatically switch between heating and cooling modes as needed to maintain the setpoints.
•
Special Heat Pump Mode:
Emergency Heat.
•
Heat-E:
An additional system mode, “Heat-E” for Emergency Heat will be displayed if the HVAC System Type is set to Heat
Pump. If there is a compressor failure with the Heat Pump system, setting the mode to Emergency Heat will allow the
supplemental Aux Heat to come on first whenever there is a call for heating. It also disables the compressor output to
prevent further damage to the HVAC system.
Caution!
Emergency Heat should only be used for emergencies until the HVAC system can be repaired. Running the system in
Emergency Heat mode is commonly the most expensive mode since only the electric heat strips are being used instead of the
more efficient heat pump compressor.
20
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TBZ500_manual_8_5x5_5_inch Combined_RDN1240221.indd 20 24-02-2021 18:55
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