Honeywell T822C User's Manual
Contents
1. Honeywell 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 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 N 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 o2. ce the temperature setting lever at the same setting as the thermometer Remove cover 2 Insert 104994A Calibration Wrench order sepa rately onto the hex nut under the coil See Fig 4 Holding the setting lever so it does not move turn the wrench clockwise until the switch just breaks con tact Remove wrench and replace cover 3 Move the setting lever to a low setting Wait at least five minutes for temperature to stabilize 4 Slowly move the setting lever until it reads the same as the thermometer 5 Remove cover Holding the setting lever so it does not move reinsert wrench and carefully turn counter clockwise y until the mercury just rolls to the left end of the tube but no farther 6 Recheck calibration Set thermostat system switch for desired operation and replace cover Checkout CAUTION Do not check thermostat operation by shorting across system control terminals This damages the thermostat heat anticipator T822C E COOLING THERMOSTATS CAUTION Do not operate cooling circuit if outdoor tempera ture is 50 F 10 C below room temperature Refer to air conditioner manufacturer recommen dations NOTE To prevent compressor short cycling a mini mum off timer may be included to provide a five minute time delay before reactivating the compressor or after compressor receives power 1 Set T822E SYSTEM switch to AUTO and FAN switch to AUTO Fan and system operation are now controlle
3. d by the thermostat 2 Move temperature setting lever about 10 F 6 C below room temperature Cooling and fan start immedi ately 3 Move temperature setting lever about 10 F 6 C above room temperature Cooling and fan stop immedi ately 4 Set T822E SYSTEM switch to AUTO and FAN switch to ON Fan runs continuously 5 Set T822E SYSTEM switch to OFF Cooling control system is disabled 6 Set temperature lever and T822E SYSTEM and FAN switches to the desired settings Fig 4 Recalibration procedure COIL SHOWN WITHOUT HEAT ANTICIPATOR CALIBRATION a WRENCH M2044 69 0548 2 Honeywell Home and Building Control Honeywell Internation Inc 1985 Douglas Drive North Golden Valley MN 55422 Home and Building Control Honeywell Limited Honeywell Limit e 35 Dynamic Drive Printed in U S A on recycled Scarborough Ontario paper containing at least 10 r post consumer paper fibers MIV 4Z9
4. ed to the extreme high end of the temperature scale T822E FAN AND SYSTEM SWITCHING The fan switch controls fan operation as follows AUTO fan operates in response to the thermostat call for cooling ON fan operated continuously The system switch controls system operations as follows OFF cooling control system is disabled AUTO cooling control system operates in response to the thermostat call for cooling RECALIBRATION These thermostats are calibrated at the factory and should not need recalibration If the thermostat seems out of adjustment first check for accurate leveling To check calibration proceed as follows 1 Move the temperature setting lever to the low end of the temperature scale 2 Remove the thermostat cover Move the setting lever until the switch just makes contact The mercury in Fig 3 T822E in typical cooling application TEMP RISE FAN a SWITCH To C1 SYSTEM SWITCH C1 ANTICIPATOR COMPRESSOR CONTACTOR A POWER SUPPLY PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED M1203 the switch will drop to the contact end of the tube 3 Replace cover and wait five minutes for the cover and the thermostat to lose the heat it has gained from your hands If the thermostat pointer and the setting lever indicator read approximately the same no recalibration is needed If recalibration appears necessary proceed as fol lows 1 Pla
5. n 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 T822C TEMP RISE L1 P HOT i2 A FAN RELAY E COMPRESSOR RELAY A 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 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 wi
6. ring 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 J H Rev 2 93 OHoneywell Inc 1993 Form Number 69 0548 2 Fig 2 T822C in typical cooling application T822C TEMP RISE des oy ci A C1 ANTICIPATOR COMPRESSOR RELAY A POWER SUPPLY PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED M2305 Settings and Adjustment TEMPERATURE SETTING Move the temperature setting lever to the desired control point on the temperature scale On positive OFF models the control circuit is broken when the lever is mov
Download Pdf Manuals
Related Search