APPLICATION
The T8034C Thermostat (see Fig. 1) controls 24 to 30 Vac single-stage heating-cooling systems. See Table 1 for application information. An spdt mercury switch makes R to W on a temperature fall for heating, and R to Y on a temperature rise for cooling.
Table 1. T8034C Specifications.
Model No. |
Application | Heat Anticipation | Switching |
Comments | See Fig. No. | |
System | Fan | |||||
T8034C1085 | For use in gas- or oil-fired heating systems. | 0.18A to 1.0A, adjustable. | Heat-Off- Cool | On-Auto | TRADELINE® | 3 |
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.
When Installing This Product . . .
Location
Locate the thermostat about 5 ft (1.5m) 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 corner.
CAUTION Electrical Shock Hazard. Can cause personal electrical shock and equipment damage.
Disconnect power supply before beginning installation.
IMPORTANT All wiring must comply with local codes and ordinances.
The T8034C can be mounted directly on a wall or horizontal outlet box:
The SUPER TRADELINE® T8034C includes the 200581 Horizontal Wallplate. For other T8043C models, order the horizontal wallplate or mounting plate assembly.
If the horizontal wallplate is used, align the thermostat and wallplate. See Fig. 2. Press firmly together until wallplate snaps in place, then wire and mount the thermostat.
If the mounting plate assembly is used, review the instructions provided with the assembly before wiring and mounting the thermostat.
To wire and mount the thermostat:
IMPORTANT An incorrectly leveled thermostat causes the temperature control to deviate from setpoint.
Temperature Setting
Push the temperature setting lever to the desired control point on the temperature scale. The same lever controls the temperature setting for either heating or cooling.
System and Fan Switching
The T8034C has System and Fan switches to control the heating-cooling systems and fan.
The System switch controls system operation:
The Fan switch controls fan operation:
IMPORTANT
The T8034C Thermostat has an adjustable heat anticipator and operates correctly only if the anticipator is adjusted to match the current draw of the primary control. Use this thermostat only on systems with current draw that falls within the range of the heat anticipator. Do not use this device on Powerpile® Systems (millivolt). Look for the current rating stamped on the nameplate of the primary control. Set the adjustable heat anticipator indicator to match the value shown on the nameplate.
If the current rating is not available, proceed as follows to determine the rating:
CAUTION Equipment Damage Hazard. Heat anticipator can be damaged.
Do not check operation by shorting across system control terminals.
IMPORTANT To assure accurate temperature control, do not touch or breathe on bimetal or thermometer.
With System switch set at Heat, and Fan switch set at Auto, move the temperature setting lever about 10°F (6°C) above room temperature:
CAUTION Equipment Damage Hazard. Air conditioning equipment (compressors) can be damaged.
Do not operate cooling when outdoor temperature is below 50°F (10°C). Refer to manufacturer’s recommendations.
IMPORTANT To prevent compressor short cycling, some manufacturer’s equipment includes a minimum-off timer to provide a five-minute time delay from when the thermostat last turned off the compressor, or from when the system first received power. This delay protects the compressor. WIth the System switch set at Cool and the Fan switch set to Auto, move the temperature setting lever about 10°F (6°C) below room temperature. Cooling and fan should start (see Important above). Move the temperature setting lever about 10°F (6°C) above room temperature. Cooling and fan should shut off.
Fan
With the System switch set to Off and the Fan switch set to On, the fan should run continuously. Move the Fan switch to Auto. In gas- or oil-fired systems, fan operation is controlled by the plenum fan control in heating and by the thermostat in cooling. In central electric heat and heat pump systems, fan operation is controlled by the thermostat in both heating and cooling.
These thermostats are calibrated at the factory and should not need recalibration. If the thermostat seems out of adjustment, first check for accurate leveling.
To check calibration:
If recalibration appears necessary:
Automation and Control Solutions
Honeywell
1985 Douglas Drive North
Golden Valley, MN 55422
Honeywell Limited-Honeywell Limitée
35 Dynamic Drive
Scarborough, Ontario
MIV 4Z9
Printed in U.S.A. on recycled paper containing at least 10% post-consumer paper fibers.
www.honeywell.com/yourhome
Download manual: Honeywell T8034C Heating and Cooling Thermostat Installation Instruction
Honeywell T8034C Heating and Cooling Thermostat Installation Instruction
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