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Then set the SYSTEM switch:
Cool:
Normal setting for months when your home
needs cooling (air conditioning). Digital display
shows a snowflake
Off:
Both heating and cooling are off.
Heat:
Normal setting for months when your home
needs heating. Digital display shows a flame
when heating is on.
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.
SYSTEM
Cool Off Heat
SYSTEM
SWITCH
4
when cooling is on.
M14228
69-1491–1
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