Honeywell ELECTRONIC THERMOSTATS T8401C Installation Instructions Manual page 7

Cooling
NOTE: To bypass the 5 minute delay, see optional sys-
tem checkout on page 6.
CAUTION
Low Temperature Hazard.
Operating at too low of an outdoor
temperature may cause compressor damage.
Do not operate cooling if outdoor temperature is
below 50°F (10°C). Refer to equipment
manufacturer instructions.
For compressor protection, during power
interruption and on initial startup, the T8401C
Electronic Thermostat will go into a 5 minute
delay. During this delay the cooling icon, a
snowflake
Fan Selection
Auto
On
Auto
Auto
Auto
Auto
*If fan operation (fuel) switch is in E position, G terminal is also energized.
, will flash.
Table 4. Thermostat Sequence of Operations.
System Selection
Off
Off
Cool
Cool
Heat
Heat
1. Slide the SYSTEM switch to Cool and the FAN
switch to Auto.
2. Press the
several degrees below the room temperature. After
approximately five minutes, the cooling equipment
should start. The fan starts and stops with the cool-
ing equipment.
3. Press the
above the room temperature. Cooling system
should shut down.
Fan
1. Slide the SYSTEM switch to Off and the FAN
switch to On. The fan should run continuously.
2. Slide the FAN switch to Auto. In heating, the fan is
controlled directly by the heating equipment and
may start a few minutes after the heating equip-
ment turns on (on most systems). When using an
electric heat thermostat, the fan starts and stops
with the heating equipment. In cooling, the fan
starts and stops with the cooling equipment.
Consult the instructions provided with The Zone Panel to
troubleshoot system problems. Refer to Table 4 for the
thermostat's Sequence of Operations.
Call
None None
None G
None O
Snowflake Symbol O, G, Y
None B
Flame symbol B, W*
7
T8401C ELECTRONIC THERMOSTATS
key to lower the temperature setting
key to raise the temperature setting
Energize
None
None
None
Snowflake Symbol
None
Flame symbol
Display
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