The T8001F Thermostat provides single-stage,
programmable temperature control for 24 Vac heating-
cooling systems with manual changeover from heat to
cool. The T8024F Thermostat provides multistage
electronic control of single-zone heating and cooling
systems. Heating cycle rate is selectable at 1, 3, 4, 5, 6,
9, or 12 cph. Cooling cycle rate is fixed at 3 cph.
Temperature indication can be set for °F or °C.
The T8001F, T8024F Thermostat is powered directly
from the system transformer. Batteries are not required
because setpoints are held permanently by non-volatile
The T8001F, T8024F model includes a thermostat,
wallplate and owner's guide. See Table 1.
If this control is replacing a control that contains
mercury in a sealed tube, do not place your old
control in the trash. Dispose of it properly.
Contact your local waste management authority
for instructions regarding recycling and the
proper disposal of the control.
When Installing this Product...
1. Read these instructions carefully. Failure to follow
them could damage the product or cause a hazard-
2. Check the ratings given in the instructions and on
the product to make sure the product is suitable for
® U.S. Registered Trademark
Copyright © 2001 Honeywell •
T8001F, T8024F Flush Mount
Table 1. Thermostat Descriptions.
• All Rights Reserved
3. Installer must be a trained, experienced service
4. After installation is complete, check out product
operation as provided in these instructions.
Can damage heating/cooling system.
Disconnect power at furnace or main breaker/
Install the thermostat about 5 ft (1.5m) above the floor in
an area with good air circulation at average temperature.
See Fig. 1. Do not install the thermostat where it can be
— drafts or dead spots behind doors and in corners.
— hot or cold air from ducts.
— radiant heat from the sun or appliances.
— concealed pipes and chimneys.
— unheated (uncooled) areas such as an outside wall
behind the thermostat.
Installing Wallplate in Wall
Level only for appearance. The thermostat func-
tions normally even when not level.
Mount wallplate and the T8001F or T8024F with the wing
anchors provided (see Fig. 2) as follows:
1. Place the wallplate template at the desired location
on the wall.
2. Trace and cutout the opening.
3. Pull the thermostat wire through the wallplate
4. Fasten the wallplate to the wall using the wing
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