Then setthe 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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