Honeywell ELECTRONIC THERMOSTATS T8401C - Manual

® U.S. Registered Trademark
Copyright © 2002 Honeywell •
• All Rights Reserved
INSTALLATION INSTRUCTIONS
69-1483-1
T8401C
Electronic Thermostats
APPLICATION
The T8401C Thermostat provides single-stage,
nonprogrammable temperature control for 24 Vac heating
cooling systems with manual changeover from heat to
cool. Heating cycle rate is selectable at 1, 3, 6, 9 or 12
cph. Cooling cycle reate is fixed at 3 cph. Temperature
indicature indication can be set for °F or °C.
The T8401C1031 (Fig. 1) is powered directly from the
zone panel. Batteries are not required because setpoints
are held permanently by non-volatile memory.
T8401C models include a thermostat, wallplate (for
wiring and mounting thermostat) and owner’s guide. See
Table 1 for a listing of thermostat features. See Table 2
for a listing of zone panels that can be used with the
T8401C.
Fig. 1. The T8401C1031 Thermostat.
MERCURY NOTICE
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 properly.
Contact your local waste management authority
for instructions regarding recycling and the
proper disposal of an old control.
INSTALLATION
When Installing this Product…
1. Read these instructions carefully. Failure to follow
them could damage the product or cause a hazard-
ous condition.
2. Check the ratings given in the instructions and on
the product to make sure the product is suitable for
your application.
3. Installer must be a trained, experienced service
technician.
4. After installation is complete, check out product
operation as provided in these instructions.
CAUTION
Damage to Heating/Cooling System Possible.
Be careful when handling wires during
installation. Disconnect power at furnace or main
breaker/ fuse box.
Location
Install the thermostat about 5 ft (1.5m) above the floor in
an area with good air circulation at average temperature.
See Fig. 2. Do not install the thermostat where it can be
affected by:
— 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.
M14752
FAN SYSTEM
Auto On Cool Off Heat
Set Room
Table 1. Thermostat Features
Model Powering Method Changeover System Selection Fan Selection
T8401C1031 Hardwired Manual Heat-Off-Cool On-Auto