Honeywell T843 User Manual

M37965

Owner’s Manual

English: Page 1

Mode d’emploi

Français : Page 6

Manual de Uso

Español: Página 11

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:		Before you begin, make sure you have:
•\	Thermostat	•\	No. 2 Phillips & small pocket screwdrivers
•\	Wall anchors & screws (2 each)	•\	Hammer
		•\	Level (optional)
		•\	Pencil
		•\	Drill and bit (3/16” for drywall, 7/32” for
			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.

69-2251EFS-03

T822/T827 Series • Owner's Manual

Product application

This thermostat provides control of:

•\ 24 Vac heating systems (T822K)

•\ 750 mV or 12 Vdc heating systems (T827K) •\ 24 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)
•\	2-wire cooling systems (T822L)
•\	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

•\ 0° to 120°F (-18° to 49°C)

Operating Relative Humidity

•\ 5% to 90% (non-condensing)

Dimensions (vertical model)

•\ 2.88W x 4.75H x 1.5D (inches) •\ 73W x 121H x 38D (mm)

Dimensions (horizontal model)

•\ 4.75W x 2.88H x 1.5D (inches) •\ 121W x73H x 38D (mm)

Electrical Ratings

\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.

Terminal\		Voltage (50/60Hz)\	Running Current
W1\ Heating\		20-30 Vac\	0.02-1.2 A
W2\ (Powerpile)\		750 mVdc\	100 mAdc
W2\ (DC Powered)\		12 Vdc\	0.1 A
Y3\	Cooling\	20-30 Vac\	0.02-1.2 A
Y3\ Normally open zone valve\		20-30 Vac\	0.02-1.2 A
1\	T822K
2\	T827K
3\	T822L
69-2251EFS—03\		2

English: Page 1 • Français : Page 6 • Español: Página 11

Base installation

1.\ Pull wires through wire hole. Position base on wall, level

and mark hole positions.

2.\ Drill holes (3/16” holes for drywall, 7/32” holes for plaster), then tap in supplied wall anchors.

3.\ Pull wires through base, posi-
	tion over anchors, and insert
	screws. Check level if desired,
	then tighten screws.	M27305
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.
W1\Heat relay.
Y2\ Cool relay, or
	normally open hot water valve.
G\ Fan relay (select models only)
1\	T822K and T827K
2\	T822L
Wire specifications
Use 18-gauge thermostat wire. Shielded
cable is not required.
		M27306
\	3\	69-2251EFS—03

T822/T827 Series • Owner's Manual

Set heat anticipator (model T822K only)

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

Your system \	Setting
Steam \	1.2
Hot water heat \	0.8
Warm air (high efficiency) \	0.8	M27307
Warm air (standard) \	0.4	M27307
Warm air (standard) \	0.4
Electric heat \	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.

HORIZUP .

M27308A

69-2251EFS—03\

English: Page 1 • Français : Page 6 • Español: Página 11

Operation

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.

M23785

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

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.

69-2251EFS—03

+ 11 hidden pages