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A160188C
6.3.7.1.   Freeze Limits
This setting controls the temperature level to which the loop  liquid can
drop  before  the  Geo  HP  unit  will  stop  operating.  See  the  Geo  HP
Installation  Instructions  for more  details. Typically, 26°F  is  chosen  for
open-loop  systems  using  untreated  water;  and  15°F  is  chosen  for
closed-loop systems using glycol or other anti-freeze solutions. After the
selection is made, touch SAVE.
• Freeze Limits: 26°F or 15°F. Default = 26°F