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Application
The ST9141A1002 Electronic Fan Timer integrates control
of all combustion blower and circulating fan operations
in a gas warm air appliance. This control is the central
wiring point for most of the electrical components in the
furnace. The basic purposes of the ST9141A1002 are to
monitor the thermostat for heat, cool, and fan demands and
run the induced draft blower motor and up to a two-speed
circulating fan as required. The ST9141A1002 monitors an
spdt pressure switch, burner limit and primary limit. A
Honeywell SV9500 Hot Surface Pilot Ignition System
Control manages the burner, which is energized through
the pressure switch. A light-emitting diode (LED) indicates
system status.
In addition, this model includes electronic air cleaner
and humidifier convenience terminal connections.
NOTE: Use this control to replace an identical ST9141A1002
Electronic Fan Timer only. This control is not for use in
general applications.
THIS IS REPLACED BY ST9120U1011 HONEYWELL
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