APPLICATION
This T8034C Thermostat provides 24 to 30 Vac control in
standard heating-cooling systems with separate heating-
cooling transformers. An spdt mercury switch makes RH to
W on temperature fall for heating, and RC to Y on a
temperature rise for cooling. Integral switches control
HEAT-OFF-COOL system operation and ON-AUTO fan
operation. Heat anticipation is adjustable, 0.18A to 1.0A.
See Fig. 1.
MOUNTING HOLE
BIMETAL ELEMENT
(THERMOSTAT
BEHIND HEAT
TO WALL OR
ANTICIPATOR
OUTLET BOX)
SCALE
.18
.2
.25
.35
.3
ADJUSTABLE HEAT
ANTICIPATOR INDICATOR
Fig. 1. Internal view of T8034C.
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.
®U.S. Registered Trademark
Copyright © 2001 Honeywell •
Heating and Cooling Thermostat
SYSTEM
MOUNTING
HOLE
SWITCH
.9
.7
.5
FAN
TEMPERATURE
SWITCH
SETTING LEVER
• All Rights Reserved
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
Disconnect power supply before beginning
installation to prevent electrical shock or equipment
damage.
Location
Locate the thermostat about 5 ft (1.5 m) above the floor on
an inside wall in an area with good air circulation at
average temperature.
Do not mount the thermostat where it can be affected by:
— drafts or dead spots behind doors or in corners.
— hot or cold air from ducts.
M5601
— radiant heat from the sun, fireplaces or appliances.
— unheated (uncooled) areas such as outside walls
behind the thermostats.
This thermostat is a precision instrument and was carefully
adjusted at the factory. Handle it carefully .
Mounting and Wiring
Disconnect power supply before beginning installation to
prevent electrical shock or equipment damage.
All wiring must comply with local codes and ordinances.
The T8034C may be mounted directly on a wall or
horizontal outlet box. Use the 200581 Horizontal Wallplate
to cover mounting marks left by old thermostat, or use
193121A Mounting Plate Assembly to mount on vertical
outlet box or to cover wall marks where larger plate is
needed. Order horizontal wallplate or mounting plate
assembly separately.
X-XX UL
T8034C
INSTALLATION INSTRUCTIONS
69-1597EF