Honeywell T843 User Manual

Owner’s Manual

69-2251EFS-03

English: Page 1

Mode d’emploi

Français : Page 6

Manual de Uso

Español: Página 11

M37965

T822/T827 Series

Thermostat

This manual covers the following models*:

T822K,L • T827K

* Images are for reference only and may not represent the actual thermostat.

Pre-installation checklist

Check package contents:

• Thermostat

• Wall anchors & screws (2 each)

Before you begin, make sure you have:

• No. 2 Phillips & small pocket screwdrivers

• Hammer

• Level (optional)

• Pencil

•

and bit (3/16” for drywall, 7/32” for

Drill plaster)

Must be installed by a trained, experienced technician

Read these instructions carefully. Failure to follow these instructions

can damage the product or cause a hazardous condition.

CAUTION: ELECTRICAL HAZARD

Can cause electrical shock or equipment damage. Disconnect power before beginning installation.

MERCURY NOTICE

If this product is replacing a control that contains mercury in a sealed tube, do not place the old control in the trash. Contact your local waste management authority for instructions regarding recycling and proper disposal.

® U.S . Registered Trademark . Patents pending.

T822/T827 Series • Owner's Manual

Product application

This thermostat provides control of:

•

Vac heating systems (T822K)

• 750 mV or 12 Vdc heating systems (T827K)

•

Vac cooling systems (T822L)

System Types

• Gas or oil

• Warm air, hot water, high-efficiency furnaces, heat pumps, steam, gravity

• Normally closed hot water valves (T822K)

•

cooling systems (T822L)

2-wire Normally

open hot water valves (T822L)

System Settings

• Heat, Off (select models only)

Fan Settings

• Auto, On (select models only)

Specifications

Temperature Control Range

• 45° to 95°F (7° to 35°C)

• 35° to 85°F (2° to 29°C)*

Operating Ambient Temperature

•

to 120°F (18° to 49°C)

0°

Operating Relative Humidity

• 5% to 90% (non-condensing)

* CAUTION: Do not use a product with

this temperature control range in a home. Temperatures at or below freezing can occur. A product with this temperature range is for use in areas where temperatures below freezing can occur, such as a garage.

Dimensions (vertical model)

• 2.88W x 4.75H x 1.5D (inches)

• 73W x 121H x 38D (mm)

Dimensions (horizontal model)

•

x 2.88H x 1.5D (inches)

4.75W

• 121W x73H x 38D (mm)

Electrical Ratings

Terminal Voltage (50/60Hz) Running Current

Heating 2030 Vac 0.021.2 A

(Powerpile) 750 mVdc 100 mAdc

(DC Powered) 12 Vdc 0.1 A

Cooling 2030 Vac 0.021.2 A

Normally open zone valve 2030 Vac 0.021.2 A

T822K

T827K

T822L

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M27305

M27306

Base installation

1. Pull wires through wire hole. Position base on wall, level and mark hole positions.

Drill holes (3/16” holes for

ywall, 7/32” holes for plas-

dr ter), then tap in supplied wall anchors.

3. Pull wires through base, position over anchors, and insert screws. Check level if desired, then tighten screws.

Wiring

1. Loosen screw terminals, insert bare wires

beneath screws, then re-tighten screws.

2. Push any excess wire back into the wall

opening

3. Plug the wall opening with nonflammable

insulation to prevent drafts from affecting thermostat operation.

Terminal Designations

R R power. Connect to 24 V hot on secondary

side of heating/cooling transformer or R on furnace/boiler for 750 mV systems.

Heat relay.

Cool relay, or

normally open hot water valve.

G Fan relay (select models only)

T822K and T827K

T822L

Wire specifications

Use 18-gauge thermostat wire. Shielded cable is not required.

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T822/T827 Series • Owner's Manual

M27308A

Set heat anticipator (model T822K only)

Move the adjustment arrow to the proper setting for your system (see table below).

Your system

Steam

1.2 Hot water heat Warm air (high efﬁciency) Warm air (standard) Electric heat

0.4

Setting

0.8

0.3

Thermostat mounting

Align the slots on the cover with tabs on the sides of the base, then push gently until the cover snaps into place.

Tab

VERT.

M27307

HORIZ.

69-2251EFS—03 4

Operation

M23785

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Fan switch (select models)

• On: Fan runs continuously.

• Auto: Fan runs only when heating or cooling system is on.

System switch (select models)

• Heat: Controls the heating system.

• Off: All systems are off.

Temperature setting

Adjust to set desired indoor temperature. Note: Temperature scale varies by model.

5-year limited warranty

Resideo warrants this product to be free from defects in workmanship or materials, under normal use and service, for a period of ﬁve (5) years from the date of ﬁrst purchase by the original purchaser. If at any time during the warranty period the product is determined to be defective due to workmanship or materials, Resideo shall repair or replace it (at Resideo’s option).

If the product is defective,

(i) return it, with a bill of sale or other dated proof of purchase, to the place from which you purchased it; or

(ii) call Resideo Customer Care at 18004681502. Customer Care will make the determination whether the product should be returned to the following address: Resideo Return Goods, 1985 Douglas Dr. N., Golden Valley, MN 55422, or whether a replacement product can be sent to you.

This warranty does not cover removal or reinstallation costs. This warranty shall not apply if it is shown by Resideo that the defect was caused by damage which occurred while the product was in the possession of a consumer.

Resideo’s sole responsibility shall be to repair or replace the product within the terms stated above. RESIDEO SHALL NOT BE LIABLE FOR ANY LOSS OR DAMAGE OF ANY

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KIND, INCLUDING ANY INCIDENTAL OR CONSEQUENTIAL DAMAGES RESULTING, DIRECTLY OR INDIRECTLY, FROM ANY BREACH OF ANY WARRANTY, EXPRESS OR IMPLIED, OR ANY OTHER FAILURE OF THIS PRODUCT.

Some states do not allow the exclusion or limitation of incidental or consequential damages, so this limitation may not apply to you.

THIS WARRANTY IS THE ONLY EXPRESS WARRANTY RESIDEO MAKES ON THIS PRODUCT. THE DURATION OF ANY IMPLIED WARRANTIES, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, IS HEREBY LIMITED TO THE FIVE YEAR DURATION OF THIS WARRANTY. Some states do not allow limitations on how long an implied warranty lasts, so the above limitation may not apply to you.

This warranty gives you speciﬁc legal rights, and you may have other rights which vary from state to state. If you have any questions concerning this warranty, please write Resideo Customer Care, 1985 Douglas Dr, Golden Valley, MN 55422 or call 18004681502.

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