T822C,E
Cooling Thermostats
Application
Fig. 1—T822C in typical cooling application
with fan relay.
T822C
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.
TEMP. RISE
L1
(HOT)
R
L2
3
C1
1
O
FAN RELAY
C1
ANTICIPATOR
2
Recycling Notice
M3375
Y
COMPRESSOR
RELAY
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.
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD
PROTECTION AS REQUIRED.
2
CONNECT FAN TO O FOR CONTINUOUS FAN OPERATION.
CONNECT FAN TO Y FOR FAN OPERATION WITH COOLING
EQUIPMENT CYCLING.
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.
3
POSITIVE OFF SWITCH PROVIDES COMPLETE CONTROL
CIRCUIT SHUTOFF. DOES NOT REPLACE POWER SUPPLY
DISCONNECT SWITCH.
M1292A
MOUNTING AND WIRING
If you have questions, call Honeywell at 1-800-468-
502.
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
Installation
1
. In replacement applications, check the existing
WHEN INSTALLING THIS PRODUCT...
. Read these instructions carefully. Failure to fol-
low them could damage the product or cause a hazard-
ous condition.
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.
1
2
. Check the ratings given in the Instructions and
on the product to make sure the product is suitable for
your application.
2
. In new installations, run wiring (if necessary) to
the thermostat location.
. Connect the wires to the terminals on the back of
3
. Installer must be a trained, experienced service
3
technician.
the thermostat. See Figs. 1, 2, or 3 for internal schemat-
ics and typical hookup diagrams.
4
4
. After installation is complete, check out product
operation as provided in these Instructions.
. 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.
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.
6. Loosely fasten the thermostat to the wall or outlet
box with a screw through the top mounting hole. Do not
tighten.
Do not mount the thermostat where it can be affected
by:
7. Level the thermostat exactly using a spirit level or
plumb line. Tighten the mounting screws.
—
—
—
—
—
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.
IMPORTANT: An incorrectly leveled thermostat will
cause the temperature control to deviate from
setpoint.
8. Replace the thermostat cover.
J. H. • Rev. 2-93 • 1
• ©Honeywell Inc. 1993 • Form Number 66 99 - -00 55 44 88 —— 22
M3375