PRODUCT DESIGN
74
COOLING MODE
The normal operational sequence in cooling mode is as fol-
lows:
• R and Y thermostat contacts close, initiating a call for
cool.
• Integrated control module performs safety circuit checks.
• Outdoor fan and compressor are energized.
• Circulator blower is energized on cool speed following a
fixed five second on delay. Electronic air cleaner termi-
nals are energized with circulator blower.
• Furnace circulator blower and outdoor cooling unit run,
integrated control module monitors safety circuits con-
tinuously.
• R and Y thermostat contacts open, completing the call
for cool.
• Outdoor fan and compressor are de-energized.
• Circulator blower is de-energized following a fixed forty
five second cool off delay period. Electronic air cleaner
terminals are de-energized.
• Furnace awaits the next call from thermostat.
FAN ONLY MODE
The normal operational sequence in fan only mode is as
follows:
• R and G thermostat contacts close, initiating a call for
fan.
• Integrated control module performs safety circuit
checks.
• Circulator blower is energized on low heat speed. Elec-
tronic air cleaner terminals are energized.
• Circulator blower runs, integrated control module moni-
tors safety circuits continuously.
• R and G thermostat contacts open, completing the call
for fan.
• Circulator blower is de-energized. Electronic air cleaner
terminals are de-energized.
• Furnace awaits the next call from thermostat.
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