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Then set the SYSTEMswitch:
Cool:
Normal setting for months when your home
needs cooling (air conditioning).
Digital display
shows a snowflake
:_4 when cooling is on.
Off:
Both heating and cooling are off.
Heat:
Normal setting for months when your home
needs heating. Digital display shows a flame 1_
when heating is on.
SYSTEM
Cool Off Heat
I
I
I
J
I**U,J
Z'SYSTEM
SWITCH
M14228
IMPORTANT
Do not operate the T8400 and T8401 in cooling
mode when the outdoor temperature is below
50°F (10°C), or damage to compressor could
result.
4
69-1491-1
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