To Next Page

To Previous Page

Seng the System Mode

Figure 20 Setting the System Mode

System Modes

• O󰀨: System is o. No heang or cooling will come on. If system was on, it will turn o

immediately.

• Heat: Only heang will occur.

• Cool: Only cooling will occur.

• Auto: Heang or cooling will come on according to the heang and cooling setpoints. The

system will automacally switch between heang and cooling modes as needed to maintain the

setpoints.

Special Heat Pump Mode: Emergency Heat

An addional 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, seng the mode

to Emergency Heat will allow the supplemental Aux Heat to come on rst whenever there is a call

for heang. It also disables the compressor output to prevent further damage to the HVAC system.

CAUTION! Emergency Heat should only be used for emergencies unl 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 ecient heat pump compressor.

MODE

FAN

Off

Auto

PRESS MODE

BUTTON TO

CHANGE SYSTEM

MODE

NuTone NTBZ48 User Manual

Other manuals for NuTone NTBZ48