Honeywell T834C Quick Start Manual Download Page 3

T834C, T8034C HEATING/COOLING THERMOSTATS

3

68-0075-2

Accessories:

200581 Horizontal Wallplate for T8034C; covers mounting 

marks from old thermostat.

193121A Mounting Plate Assembly for T834 or T8034C; 

includes mounting plate, adapter ring, mounting screws 

and instructions. Adapter ring allows use of T34 or T8034C 

on vertical box. Mounting plate is 6-7/8 in. x 4-3/4 in. (154 

mm x 106 mm) to cover wall marks where larger plate is 

needed.

104994A Calibration Wrench. 

209649A Universal Cover Plate (Taupe) is 7-3/4 in. x 5-3/4 in. 

(288 mm x 146 mm) to cover wall marks from old thermo-

stat.

209650A Universal Cover Plate (White) is 7-3/8 in. x 5-3/4 in. 

(288 mm x 146 mm) to cover wallmarks from old thermo-

stat.

Fig. 1. T834C Thermostat approximate 

dimensions in in. (mm). (T8034C Thermostat has

same dimensions except mounting is horizontally.)

Fig. 2. 200581 Horizontal Wallplate approximate 

dimensions in in. (mm). (For use with 

T8034C Thermostat.) 

INSTALLATION

When Installing this Product...

1.

Read these instructions carefully. Failure to follow them 

could damage the product or cause a hazardous      

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

Electrical Hazard.

Can cause personal electrical shock or equipment 

damage.

Disconnect power supply before beginning installation.

Location

Locate the thermostat about 5 ft (1.5m) above the floor in an 

area with good air circulation at average temperature. do not 

mount the thermostat where it may be affected by:

— drafts or dead spots behind doors or in corners.

— hot or cold air from ducts.

— radiant heat from the sun, fireplaces, or appliances.

— concealed pipes and chimneys.

— unheated (uncooled) areas behind the thermostat, such as 

an outside wall.

Mounting and Wiring

Disconnect power supply before beginning installation.

IMPORTANT

All wiring must comply with local codes and ordi-

nances.

60

70

80

90

1-1/2

(38)

3-1/4

(83)

4-3/4
(121)

2-7/8

(73)

M20945

Heat

Off

Cool

On

Fan

Auto

1-1/2

(38)

3-1/4 (83)

T8034C Vertical

T834C Horizontal

4-3/4 (121)

2-7/8

(73)

Heat Off Cool

On Fan Auto

90

80

70

60

UP

5 (127)

1/4 (6)

3-5/8

(92)

M1144

Summary of Contents for T834C

Page 1: ...ed bimetal operates silent dust free spdt mercury switch T834C models have vented cover to provide better air flow for temperature sensing Adjustable heat anticipator and fixed cool anticipator on all models T834C models mount directly on wall or on a vertical outlet box T8034C models mount directly on wall or on a horizontal outlet box SUPER TRADELINE T8034C includes horizontal wallplate for cove...

Page 2: ...rd cooling systems mounts horizontally adjustable heat anticipator 0 18 to 1 0A Additional SUPERTRADELINE Features Fan can be controlled from thermostat or plenum switch Wallplate for covering marks from old thermostat T8034C only TRADELINE Models T843C Heating Cooling Thermostat for use in single stage heat pump electric furnace and standard heating cooling systems mounts vertically adjustable he...

Page 3: ... the product or cause a hazardous 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 Electrical Hazard Can cause personal electrical shock or equipment da...

Page 4: ...he thermostat and mounting plate if used to the wall or outlet box with a screw through the top mounting hole Adjust thermostat so it is approxi mately level and start the second screw through the bottom mounting hole Do not tighten 8 Level the thermostat exactly using a level device Tighten the mounting screws IMPORTANT This thermostat is calibrated at the factory mounted at true level Any inaccu...

Page 5: ...le to the wall or outlet box with a screw through the left mounting hole Adjust thermostat so it is approximately level and start the second screw through the right mounting hole Do not tighten 8 Level the thermostat exactly using a level device Tighten the mounting screws IMPORTANT This thermostat is calibrated at the factory mounted at true level Any inaccuracy in leveling during the mounting ca...

Page 6: ...SYSTEM SWITCH HEAT OFF COOL FAN SWITCH AUTO ON H1 TEMP FALL C1 ANTICIPATOR FAN RELAY HEAT OFF COOL C1 H1 ANTICIPATOR G R Y L1 HOT L2 W HEAT RELAY 1 1 H1 TEMP FALL C1 L1 HOT L2 1 1 2 2 POWER SUPPLY PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED INSTALL JUMPER BETWEEN W AND Y TERMINALS WHEN HEAT RELAY IS NOT USED HEAT RELAY FAN RELAY FAN SWITCH ON AUTO COOL OFF HEAT COOL OFF HEAT SYSTE...

Page 7: ...urrent draw of the primary control Use this thermostat only on systems with current draws that fall within the range of the heat anticipa tor do not use this device on Powerpile millivolt systems 1 A current rating is usually stamped in the nameplate of the primary control Set the adjustable heat anticipator indicator to match the value given on the nameplate 2 If the current rating is not availab...

Page 8: ...iately 3 Move temperature setting lever about 10 F 6 C above room temperature Cooling and fan should shut off Fan 1 With System switch set to Off and Fan switch set to On the fan runs continuously 2 Move Fan switch to Auto In gas fired or oil fired sys tems fan operation is controlled by thermostat in cool ing and by plenum fan control in heating In heat pump and some central electric heat systems...

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