Honeywell T822 User manual

® U.S. Registered Trademark
Copyright © 2004 Honeywell International Inc. • • All Rights Reserved
INSTALLATION INSTRUCTIONS
69-1711
T822 Thermostat
STEP 1. PREPARE FOR
INSTALLATION
The T822 Thermostat controls 2-wire, 15 Vac to 30 Vac,
gas, oil or electric heating-only systems.
The T822 Thermostat is not suitable for:
• cooling systems
• heating-cooling systems
• 3-wire electric heating systems
If you are unsure which thermostat model is right for your
system, visit www.honeywell.com/yourhome or call
Honeywell Customer Care at 1-800-468-1502.
1. Check that the following components are included:
• Thermostat
• Two one-inch screws
• Installation Instructions
2. Required tools:
• Slotted screwdriver
• Drill
• Drill bit (1/16 in.)
• Needle nose pliers
• Level
• Pencil
STEP 2. REMOVE OLD
THERMOSTAT
1. Turn power off to the system at the furnace or at
the fuse/circuit breaker panel.
2. Remove cover on the old thermostat. If the cover
does not easily pull off, remove any screws that
may fasten the cover to the thermostat.
3. Locate the heat anticipator scale and the heat
anticipator lever on the old thermostat (see Fig. 1).
Fig. 1. Heat anticipator on old thermostat (example).
4. Record the number that the heat
anticipator lever points to on the heat
anticipator scale.
NOTE: If you cannot find the heat anticipator setting on
your thermostat, you can use a standard setting
for your type of system when you reach Step 5.
Set Heat Anticipator On New Thermostat.
5. Remove any screws that hold the thermostat to the
wall and pull the thermostat away from the wall.
6. Remove the two wires from the old thermostat and
wrap them around a pencil to keep them from fall-
ing back into the wall (see Fig. 2). If there are more
than two wires connected to your old thermostat,
do not remove the wires. Visit www.honey-
well.com/yourhome or call 1-800-468-1502 for fur-
ther assistance with the installation.
Fig. 2. Pull wires through wall opening.
M21192
OLD THERMOSTAT HEAT
ANTICIPATOR SCALE
HEAT ANTICIPATOR LEVER
TYPI CA L LO CA TIO N OF H E A T
AN TI C IP A TO R S CA LE AND LEVE R
WIRES
THROUG
H
WALL
OPENING
M1964
5

T822 THERMOSTAT
69-1711 2
MERCURY NOTICE
If this thermostat is replacing a control that
contains mercury in a sealed tube, do not place
the old thermostat in the trash. Contact your local
waste management authority for instructions
regarding recycling and proper disposal of this
control or of an old control containing mercury in
a sealed tube.
STEP 3. CONNECT WIRES TO NEW
THERMOSTAT
IMPORTANT
All wiring must comply with local building codes
and ordinances. If you are unsure about house-
hold wiring procedures, please call your local
heating/cooling contractor.
1. Remove the cover on the new thermostat. To
remove the cover, insert your thumb into the inden-
tation on the side and pull the cover away from the
thermostat (see Fig. 3).
2. Loosen the R and W terminal screws on the back
of the new thermostat (see Fig. 4).
3. Remove the two wires from the pencil and attach
one wire to the R terminal and the other wire to the
W terminal (see Fig. 4 and 5).
4. Plug the hole in the wall with insulation to prevent a
warm or cool draft from affecting the operation of
the thermostat.
Fig. 3. Remove cover on new thermostat.
Fig. 4. R and W terminals on new thermostat.
Fig. 5. Wraparound and straight wiring connections.
STEP 4. MOUNT NEW
THERMOSTAT TO WALL
1. Position the thermostat on the wall. Place a level
on top of the thermostat and use a pencil to mark
the two mounting holes on the wall (see Fig. 6).
2. Move the thermostat to the side and drill the
mounting holes in the wall using a 1/16 in. drill bit
at the locations you marked.
3. Position the thermostat over the drilled holes and
loosely insert the mounting screws into the drilled
holes. Check the leveling of the thermostat and
tighten the mounting screws. Do not over tighten.
4. Remove styrofoam packing material that holds the
mercury switch in place during shipping.
•40•50•60•
M19979
BACK OF
THERMOSTAT
COVER
M1998
0
RW
M19648
F
OR WRAPAROUND
I
NSERTION STRIP
7
/16 IN. (11 MM)
FOR STRAIGH
T
INSERTION
STRIP
5/16 IN. (8 MM
)

T822 THERMOSTAT
3 69-1711
Fig. 6. Mount new thermostat to wall.
STEP 5. SET HEAT ANTICIPATOR
ON NEW THERMOSTAT
1. Set the heat anticipator lever to the number that
you recorded in Step 2. Remove Old Thermostat,
sub-step 4 (see Fig. 7).
Fig. 7. Heat anticipator on new thermostat.
2. If you could not find a heat anticipator setting on
your old thermostat, use the setting listed in
Table 1 for your type of heating system.
Table 1. Heat Anticipator Setting.
3.
Place the cover on the thermostat and turn the
power back on. If the heating system runs too long
to maintain a comfortable temperature, adjust heat
anticipator lever clockwise one scale mark (see Fig.
7). Do not adjust heat ancitipator below .3 Amps. If
the heating system needs to run longer to maintain
a comfortable temperature, adjust heat anticipator
lever counterclockwise, in the direction of the arrow,
one scale mark (see Fig. 7).
STEP 6. OPERATING NEW
THERMOSTAT
1. Adjust the temperature setting lever to your desired
setting. If it is too warm, lower the temperature set-
ting. If it is too cool, raise the temperature setting.
STEP 7. ADJUSTABLE RANGE
STOPS
1. The T822 Thermostat comes equipped with adjust-
able range stops (see Fig. 8). The range stops are
factory set to allow for maximum adjustment of the
temperature lever. If you choose to limit the adjust-
ment of the temperature lever, set range stops to
your desired setting.
Fig. 8. Set adjustable range stops.
.18
.2
.25 .3
.9.7
.5
.4
L
O
N
G
E
R
LEVEL
DATE CODE
MODEL NO.
M19981
NOTE: MOVETEMPERATURE LEVER IF
IT BLOCKS MOUNTING HOLE
MOUNTING
HOLE
M
OUNTING
H
OLE
.18
.2
.25 .3
.9.7
.5
.4
L
O
N
G
E
R
M19982
PLACE FINGER
HERE TO MOVE
LEVER
HEAT ANTICIPATOR
THIS POINT
SHOULD ALIGN WIT
H
HEAT ANTICIPATOR
SETTING
.18
.2
.25 .3
.9.7
.5
.4
L
O
N
G
E
R
DATE CODE
MODEL NO.
Heating System
Heat Anticipator
Setting (Amps)
Hot Water .8
High Efficiency Warm Air (90% or
better)
.8
Gas or Oil Warm Air .4
Electric .3
M22003
.18
.2
.25 .3
.9
.7
.5
.4
L
O
N
G
E
R
DATE CODE
MODEL NO.
ADJUSTABLE
RANGE
STOPS

69-1711 J.S. 2-04 www.honeywell.com/yourhome
T822 THERMOSTAT
Printed in U.S.A. on recycled
paper containing at least 10%
post-consumer paper fibers.
Automation and Control Solutions
Honeywell International Inc. Honeywell Limited-Honeywell Limitée
1985 Douglas Drive North 35 Dynamic Drive
Golden Valley, MN 55422 Scarborough, Ontario
M1V 4Z9
IF YOU HAVE A PROBLEM Customer Assistance
Please read and follow the provided instructions for this
thermostat. For additional information, go to
www.honeywell.com/your home or call Honeywell
Customer Care at 1-800-468-1502.
Before calling, please have the following information
available:
• Thermostat model number and date code (refer to
Fig. 6 for the location of the model number and date
code).
• Type of heating system (for example: gas or oil; warm
air, hot water).
If. . . Then. . .
Heating system
does not come on.
•Make sure the temperature
setting is above the room
temperature.
•Make sure the circuit breaker
is not tripped and reset it if
necessary.
•Make sure the power switch at
the equipment is in the On
position.
•Wait 5 minutes for the system
to respond.
Heating system runs
too long to maintain
a comfortable
temperature.
•Verify the thermostat is level.
•Adjust heat anticipator lever
clockwise one scale mark (see
Fig. 7). Do not adjust heat
anticipator below .3 Amps.
Heating system
needs to run longer
to maintain a
comfortable
temperature.
•Verify the thermostat is level.
•Adjust heat anticipator lever
counterclockwise, in the
direction of the arrow, one
scale mark (see Fig. 7).
Temperature lever
cannot be set to the
highest and/or
lowest setting on the
temperature scale.
•Adjust temperature range
stops (see Fig. 8).