Emerson 1F92 - Manual (Page 20)

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PROGRAMMABLE PROGRAMMABLE PROGRAMMABLE PROGRAMMABLE PROGRAMMABLE
COOL FAN-OFF AND
COOL FAN-OFF AND COOL FAN-OFF AND COOL FAN-OFF AND COOL FAN-OFF AND
FAN-ON DELAY.
FAN-ON DELAY. FAN-ON DELAY. FAN-ON DELAY. FAN-ON DELAY.
(Installer table steps 7 and 8.) These
items allow a selection of 0 to 127
seconds of fan-off delay after the
thermostat has satisfied the call for
cool, or a fan-on delay of 1 to 30
seconds on a call for cool (or heat
pump compressor activation).
The fan-off delay allows the fan to
continue running after the compres-
sor has shut off. This distributes the
cool air that would otherwise stay
trapped in the air conditioning coils
through the ducts. Ideally the timing
would be set so the fan shuts off just
as the cool air is exhausted. If this
timing is set too long the fan may
begin blowing warm air before it
shuts off. Shortening the fan-off
delay will prevent this.
A short delay to allow the A-coil
to cool off (or warm up in heat
pump) before the fan turns on may
be preferred. This also allows the
compressor and the fan to come
on at slightly different times,
which allows full power to the
compressor on start up. Recom-
mended setting for fan-on delay is
10 seconds or less. A system that
does not have a high head pressure
cutout should have a delay of 10
seconds or less.
PROGRAMMABLE PROGRAMMABLE PROGRAMMABLE PROGRAMMABLE PROGRAMMABLE
HEAT FAN-OFF DELAY.
HEAT FAN-OFF DELAY. HEAT FAN-OFF DELAY. HEAT FAN-OFF DELAY. HEAT FAN-OFF DELAY.
(Installer table step 9.) This item
allows a selection of 0 to 127
seconds of fan-off delay after the
thermostat has satisfied the call for
heat if ELECT HEAT FAN (Step 3)
is selected ON.
The fan-off delay allows the fan to
continue running after the burner,
heating element, etc. has shut off.
This distributes the heat that would
otherwise stay trapped in the ducts.
Ideally the timing would be set so
the fan shuts off just as the warm air
is exhausted. If this timing is set too
long the fan may begin blowing cool
air before it shuts off. Shortening
the fan-off delay will prevent this.
PUMP (FOSSIL FUEL KIT PUMP (FOSSIL FUEL KIT PUMP (FOSSIL FUEL KIT PUMP (FOSSIL FUEL KIT PUMP (FOSSIL FUEL KIT
ALTERNATIVE).
ALTERNATIVE). ALTERNATIVE). ALTERNATIVE). ALTERNATIVE).
(Installer table step 10; heat pump
only) This item controls heat pump
compressor operation with a fossil
fuel auxiliary. This menu item may
eliminate the need for a separate
fossil fuel kit, although we recom-
mend that you consult the heat
pump system manufacturer before