Venstar T7900 - Manual (Page 65)

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Main Menu Buttons -
Settings
Heat Pump Settings
Installation Settings
HP Lockout Outdoor Temp (65˚)
Heat Pump will not run below this temp. (20 - 75 deg. F)
Aux Heat Lockout - DISABLED
Aux Heat Lockout - ENABLED
Turns on Aux Heat Lockout.
Aux Heat Lockout Temp
(65˚)
Aux Heat will not run above this temp. (0 - 75 deg. F) GAS/EL or HP dip
switch must be set for HP and GAS or ELEC dip switch must be set for ELEC.
Dual Fuel Settings
•
Dual Fuel - ON/OFF
•
Changeover With Outdoor - ON/OFF
ON: Uses an outdoor sensor for changeover.
OFF: Uses a third stage heat demand for changeover.
•
Adjust Balance Point
Choose the temperature for changeover to fossil fuel. (0 - 60 deg. F)
This feature is for heat pump applications only.
This will only appear if the GAS/EL or HP dip switch is set for HP
and the GAS or ELEC dip switch is set for Gas.
When Dual Fuel is ON, an outdoor temperature or, if Change With Outdoor is
set to OFF a demand for third stage heat will be used to stop running the heat
pump and switch to a fossil fuel source of heat. NOTE: Once the change to
fossil fuel is made, the heat demand must finish with fossil fuel. Additional heat
demands within 10 minutes will also use fossil fuel, regardless of outdoor
temperature or stage demand.
Heat Pump Lockout - DISABLED
Heat Pump Lockout - ENABLED
Turns on Heat Pump Lockout.
(Only available
when dip switch
is set for Heat
Pump operation.)
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