69-1387-1 G.H. Rev.
10
-01
Printed in Mexico
www.honeywell.com/yourhome
T8024D PROGRAMMABLE MULTISTAGE THERMOSTAT
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Table 2. Preprogrammed Time and
Temperature Settings.
CHECKOUT
Heating
1.
Slide the SYSTEM switch to Heat and the FAN
switch to Auto.
2.
Press and hold the
▲
key to raise the temperature
setting several degrees above the room tempera-
ture. After approximately ten seconds, the heating
equipment should start. In conventional systems,
the system turns on the fan through the use of a
time delay relay or through a limit control. When
using an electric heat thermostat, the fan starts
immediately.
3.
Press the
▼
key to lower the temperature setting
below the room temperature. Heating equipment
should stop.
Cooling
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 manufacturer’s
recommendations.
• Allow compressor to remain off for five minutes
before restarting.
1.
Slide the SYSTEM switch to Cool and the FAN
switch to Auto.
2.
Press the
▼
key to lower the temperature setting
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
▲
key to raise the temperature setting
above the room temperature. Cooling system
should shut down.
NOTE: To bypass the 5 minute delay, see the Optional
System Checkout section.
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.
Make certain all equipment responds properly to the
thermostat.
Period
Time
Heat Setpoint Cool Setpoint
WAKE
6:00 AM
70°F (21°C)
78°F (26°C)
LEAVE
8:00 AM
62°F (17°C)
85°F (29°C)
RETURN 6:00 PM
70°F (21°C)
78°F (26°C)
SLEEP
10:00 PM
62°F (17°C)
85°F (29°C)
