1 69-0548—2J. H. • Rev. 2-93 • • ©Honeywell Inc. 1993 • Form Number 69-0548—2
T822C,E
Cooling Thermostats
Application
T822C,E Thermostats provide low voltage control of
cooling systems. Both models have fixed cooling antici-
pators and are available with a positive OFF switch and
temperature range stops. The T822E has ON-AUTO fan
switching and OFF-AUTO system switching.
Recycling Notice
This control contains mercury in a sealed tube. Do not
place control in the trash at the end of its useful life.
If this control is replacing a control that contains mer-
cury in a sealed tube, do not place your old control in the
trash.
Contact your local waste management authority for
instructions regarding recycling and the proper disposal
of this control, or of an old control containing mercury in
a sealed tube.
If you have questions, call Honeywell at 1-800-468-
1502.
Installation
WHEN INSTALLING THIS PRODUCT...
1. Read these instructions carefully. Failure to fol-
low them could damage the product or cause a hazard-
ous 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
Disconnect power supply before beginning in-
stallation to prevent electrical shock or equip-
ment damage.
LOCATION
Locate the thermostat about 5 ft [1.5 m] above the
floor on an inside wall in an area with good air circula-
tion 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 form the sun, fireplaces, or appliances.
—concealed pipes and chimneys.
—unheated (uncooled) areas behind the thermostat
such as an outside wall.
Fig. 1—T822C in typical cooling application
with fan relay.
MOUNTING AND WIRING
Disconnect power supply before beginning installa-
tion to prevent electrical shock or equipment damage.
All wiring must comply with local codes and ordi-
nances. T822C,E Thermostats are designed to be verti-
cally mounted on a wall or an outlet box.
1. In replacement applications, check the existing
thermostat wires for cracked or frayed insulation. Re-
place any wires in poor condition. If the wire is plastered
into the wall, make a hole next to the wires and loosen
the wires so that they can be pushed back into the wall
later.
2. In new installations, run wiring (if necessary) to
the thermostat location.
3. Connect the wires to the terminals on the back of
the thermostat. See Figs. 1, 2, or 3 for internal schemat-
ics and typical hookup diagrams.
4. Remove thermostat cover by pulling outward on
bottom edge of cover until it snaps free of the thermostat
base. Carefully remove and discard the foam plastic
shipping insert. This insert protects the switch and bi-
metal assembly during shipping.
5. Push excess wire back through the hole and plug
any opening with insulation to prevent drafts that may
affect thermostat performance.
6. Loosely fasten the thermostat to the wall or outlet
box with a screw through the top mounting hole. Do not
tighten.
7. Level the thermostat exactly using a spirit level or
plumb line. Tighten the mounting screws.
IMPORTANT: An incorrectly leveled thermostat will
cause the temperature control to deviate from
setpoint.
8. Replace the thermostat cover.
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD
PROTECTION AS REQUIRED.
CONNECT FAN TO O FOR CONTINUOUS FAN OPERATION.
CONNECT FAN TO Y FOR FAN OPERATION WITH COOLING
EQUIPMENT CYCLING.
POSITIVE OFF SWITCH PROVIDES COMPLETE CONTROL
CIRCUIT SHUTOFF. DOES NOT REPLACE POWER SUPPLY
DISCONNECT SWITCH.
M1292A
T822C
1
L1
(HOT)
L2
TEMP. RISE
C1
C1
ANTICIPATOR
R
O
Y
FAN RELAY
COMPRESSOR
RELAY
2
3
3
2
1
M3375
M3375
(2 pages)
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