Honeywell T822, TS822 Product Information Sheet

T822, TS822

Heating/Cooling Thermostats

PRODUCT DATA

FEATURES

• T822A, D, F and TS822A control heating systems.

• T822C, E control cooling systems.

• T822G controls heating or cooling systems.

• T822F provides Auto-On System switching.

• T822D, F, G heating anticipators are adjustable.

• T822A and TS822A heating anticipators are not adjustable.

• T822C, F, G cooling anticipators are not adjustable.

• Coiled bimetal operates quiet, dust-free mercury switch.

• All wiring connections are made on back of thermostat.

• All models are mounted directly on wall or on standard vertical outlet box.

• T822A, C, D and TS822A are available with positive Off.

• All models have vented covers for better air flow and improved temperature sensing.

APPLICATION

T822 models provide low voltage (millivoltage) control of heating or cooling systems.

Contents

Application.........................................................................1

Features ............................................................................1

Specifications ....................................................................2

Ordering Information .........................................................2

Installation .........................................................................3

Settings and Adjustments..................................................5

Checkout ...........................................................................6

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T822, TS822 HEATING/COOLING THERMOSTATS

SPECIFICATIONS

The specifications given in this publication do not include normal manufacturing tolerances. Therefore, this unit may not exactly match the listed specifications. Also, this product is tested and calibrated under closely controlled conditions, and some minor differences in performance can be expected if those conditions are changed.

TRADELINE® MODELS

TRADELINE® models are selected and packaged for ease of handling, ease of stocking, and maximum replacement value. TRADELINE® specifications are the same as those of standard models except as follows:

Tradeline Models Available:

T822D Heating Thermostat used for low voltage heating appli-

cations with adjustable heat anticipator.

TS822A Heating Thermostat used for 250/500 and 750 mV

applications with nonadjustable heat anticipator.

Additional Features:

• T822D and TS822A available with positive Off.

• T822D models available with heat anticipator factory set at

0.2A for electric heat applications.

• Temperature range stops available on some TRADELINE models.

STANDARD MODELS

Standard Models Available:

T822A Heating Thermostat used in low voltage heating appli-

cations. Nonadjustable heating anticipator.

T822C Cooling Thermostat used in low voltage cooling appli-

cations. Nonadjustable cooling anticipator.

T822D Heating Thermostat used in low voltage heating appli-

cations. Adjustable heat anticipator.

T822F Heating Thermostat used in low voltage heating appli-

cations. Adjustable heat anticipator and On-Auto Fan switching.

T822G Heating or Cooling Thermostat used in low voltage

heating or cooling applications. Works with series 20 heating applications. Adjustable heat anticipator. Nonadjustable cooling anticipator.

TS822A Heating Thermostat used in millivoltage heating

applications.

Electrical Ratings:

T822A: 0 to 1.2A at 30 Vac; 1.5A at 24 Vdc. T822C: 1.0A running, 5.0A inrush at 25 Vac. T822D,F,G: 0.18 to 0.8A at 30 Vac/Vdc. TS822A: 0.1A at 250/500 and 750 mV.

Anticipator Ratings:

T822A: Nonadjustable. Factory set from 0 to 0.4A. T822C: Nonadjustable. Factory set from 0 to 1.0A. T822D: Adjustable from 0.18 to 1.0A or 0.3 to 1.2A. T822F: Adjustable from o.18 to 1.0A. T822G:

Heating Anticipator: Adjustable from 0.18 to 1.0A. Cooling Anticipator: Nonadjustable. Factory set from 0 to

1.0A.

Switching:

Heating Thermostats: Spst mercury switch makes R to W on

temperature fall.

Cooling Thermostats: Spst mercury switch makes R to Y on

temperature rise.

Temperature Setting Range (Specify When Ordering):

Standard Heating Models: 55° F to 95°F (13°C to 35 °C). Positive Off Heating Models: 60° F to 95°F (16°C to 35°C). Standard Cooling Models: 55° F to 95°F (13 °C to 35°C). Positive Off Cooling Models: 55° F to 85°F.13°C to 29°C).

Dimensions: See Fig. 1.

Mounting Means: Two screws through thermostat mounting

holes to wall or vertical or horizontal mounting box.

Optional Specifications:

Positive Off Switch: Temperature setpoint lever provides

complete control circuit shutdown. Does not replace power supply disconnect switch.

Adjustable Range Stops: Limits setpoint temperature range.

Accessories:

104944A Calibration Wrench. 193121A Mounting Plate to mount thermostat on horizontal or

vertical outlet box.

ORDERING INFORMATION

When purchasing replacement and modernization products from your TRADELINE® wholesaler or distributor, refer to the TRADELINE® Catalog or price sheets for complete ordering number.

If you have additional questions, need further information, or would like to comment on our products or services, please write or phone:

1. Your local Honeywell Automation and Control Products Sales Office (check white pages of your phone directory).

2. Honeywell Customer Care

1885 Douglas Drive North

Minneapolis, Minnesota 55422-4386 In Canada—Honeywell Limited/Honeywell Limitée, 35 Dynamic Drive, Scarborough, Ontario M1V 4Z9. International Sales and Service Offices in all principal cities of the world. Manufacturing in Australia, Canada, Finland, France, Germany, Japan, Mexico, Netherlands, Spain, Taiwan, United Kingdom, U.S.A.

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T822, TS822 HEATING/COOLING THERMOSTATS

Mounting and Wiring

1. Disconnect power supply before beginning installation.

IMPORTANT

All wiring must comply with local codes and ordinances.

NOTES:

— The T822 or TS822 Thermostats are designed to

be wall or vertical outlet box mounted.

— In a 250 or 500 mV applications, use No. 14 wire,

if possible and make the run as short as possible (consider this when selecting a location).

— For a 750 mV application, the maximum wire

lengths are shown in Table 1.

•60•70•80•90•

M2094

Fig. 1. T822/TS822 dimensions in in. (mm).

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 can 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.

Table 1. Wire Length.

Maximum Combined

Maximum Length

2-Wire Cable

L e n g t h

2-Single Wires

Wire

Size

(ft) (m) (ft) (m)

No. 18 30 9.0 60 18.0

No. 16 50 15.0 100 30.0

No. 14 80 24.5 160 49.0

2. In replacement applications, check existing thermostat wires for cracked or frayed insulation. Replace any wires in poor condition.

NOTE: If wire is plastered into the wall, make a hole next to

the wires and loosen them so they can be pushed back into the wall later.

3. In new installations, run wiring, if necessary, to the thermostat location.

4. Connect the wires to the terminals on back of thermostat. See Fig. 2-8 for internal schematics and typical hookup diagrams.

5. Remove thermostat cover by pulling outward from indention on the right or left side of cover until it snaps free of thermostat base. Carefully remove and discard foam plastic shipping insert protecting switch and bimetal assembly during shipping.

6. Set the adjustable heat anticipator indicator (select models) to match the current draw of the primary heating control (see Heat Anticipator Setting).

7. Push excess wire back through the hole and plug any opening with insulation to prevent drafts that can affect thermostat performance.

8. Loosely fasten the thermostat to the wall or outlet box with a screw through the top mounting hole. Do not tighten.

9. 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 causes control point deviation.

10. Replace thermostat cover.

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