Emerson 1F97-391 User Manual

Page 23

compressor and the fan to come on at
slightly different times, which allows
full power to the compressor on start
up.

The fan off delay allows the fan to
continue running after the compressor
has shut off. This distributes the
cooling 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.

CONFIGURA

CONFIGURATION

TION

by “locking out” the compressor for at
least five minutes after each cycle.
When the thermostat is in compressor
lockout, the word COOL will flash on
the display. During this period, the
compressor will not be energized.

Selecting COMP LOCK ON in the
configuration menu (page 18, step 6)
will enable this feature.

COMPRESSOR LOCKOUT

FOR QUALIFIED SERVICE
TECHNICIANS’ USE ONLY.
HOMEOWNERS SHOULD
NOT USE THIS FEATURE
DUE TO POSSIBILITY OF
EQUIPMENT OR PROPERTY
DAMAGE, OR PERSONAL
INJURY.

To override this feature for one
cycle while testing thermostat
operation, press SET

TIME

and

SET

DAY

buttons at the same

time.

Lockout Bypass Option

This thermostat is designed with an
optional compressor lockout feature.
It is designed to protect the system
against premature compressor failure

The automatic changeover feature of
this thermostat can be disabled
(automatic changeover allows the
thermostat to switch between heating
and cooling to maintain temperature).
If this thermostat is controlling a
heating-only or cooling-only system,
the heat, cool, or auto modes can be
disabled.

DISABLING HEAT, COOL,

DISABLING HEAT, COOL,
OR AUTO MODES

OR AUTO MODES

OPTIONAL REMOTE

OPTIONAL REMOTE
TEMPERATURE SENSE

TEMPERATURE SENSE

An optional remote sensor (part #
F145-1328) can be attached to this
thermostat and may be wired as far

Installation/Configuration