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• HP  Lockout: Adjustable  from  -20  to  55°F  (-28  to  13°C)  or  None.
Default = None
• Furnace, Electric Heat or Hydronic Lockout: Adjustable from 15 to
55°F (-9 to 13°C) or None. Default = None
• Defrost  with  Furnace,  Electric  Heat  or  Hydronic:  Yes  or  No.
Default = Yes
– For Geothermal units, lockout for auxiliary heat (furnace or electric
resistance) is not enabled. 
NOTE: When simultaneous heating and cooling demand feature is ON,
the system will try to respect the settings for heat source but may override
the settings if the preferred heat source is unable to deliver heat.
6.3.6.   Stages / Latch for 18VS
For  18VS  heat  pumps,  the  cooling  and  heating  stage/latch  can  be
changed.  Select  cooling  or  heating next  to stages/latch. The  maximum
stage  and  the  minimum  stage  can  be  selected.  The  minimum  selected
stage can be locked-in or set based upon the outside temperature. 
A14228A
6.3.7.   Geothermal HP (when available)
First touch SETUP, then touch Geo HP to set up the parameters for the
Geo HP unit.