USER’S INFORMATION MANUALFOR YOUR COMBINATION GAS HEATING/ELECTRIC COOLING AIR CONDITIONING UNIT

DO NOT DESTROY.PLEASE READ CAREFULLY AND KEEP IN A SAFE PLACEFOR FUTURE REFERENCE BY A SERVICEMAN OR USER

OF THIS APPLIANCE.

ST-A1111-03

71/2 THRU 121/2 TON MODELS

— Do not store or use gasoline orother flammable vapors andliquids in the vicinity of this orany other appliance.

— WHAT TO DO IF YOU SMELLGAS

• Do not try to light anyappliance.

• Do not touch any electricalswitch; do not use any phonein your building.

• Leave the buildingimmediately.

• Immediately call your gassupplier from a neighbor’sphone. Follow the gassupplier’s instructions.

• If you cannot reach your gassupplier, call the firedepartment.

— INSTALLATION AND SERVICEMUST BE PERFORMED BY AQUALIFIED INSTALLER,SERVICE AGENCY OR THE GASSUPPLIER.

FIRE OR EXPLOSION HAZARD

Failure to follow safety warningsexactly could result in seriousinjury, death or propertydamage.

! WARNING

IMPORTANT: READ THESEINSTRUCTIONS THOROUGHLYBEFORE ATTEMPTING TO OPERATETHIS FURNACE.

92-20802-102-00

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INTRODUCTIONRecognize this symbol as an indication of Important Safety Information!!

This manual contains the operatinginstructions for your combinationgas/electric year-round air conditioner.There are precautions that should betaken to maximize satisfaction from thisair conditioner.

IMPORTANT: COMPLETELY READALL INSTRUCTIONS PRIOR TOATTEMPTING TO OPERATE ORMAINTAIN THE PRODUCT.

This unit has been designed to giveyou many years of efficient,dependable comfort. With regularmaintenance, your unit will operatesatisfactorily year after year. Pleaseread this manual to familiarize yourselfwith operation, maintenance and safetyprocedures.

SAFETYCarefully follow these safety rules:

1. The area around the unit must bekept clear and free of allcombustible materials includinggasoline and other flammablevapors and liquids.

2. Do not block the combustion airinlets or the exhaust air outletopenings.

3. Do not operate the unit without allpanels and doors securely in place.

SHOULD OVERHEATING OCCUR ORTHE GAS SUPPLY FAIL TO SHUTOFF, SHUT OFF THE MANUAL GASVALVE TO THE APPLIANCE BEFORESHUTTING OFF THE ELECTRICALSUPPLY. FAILURE TO DO SO CANRESULT IN AN EXPLOSION OR FIRECAUSING PROPERTY DAMAGE,SEVERE PERSONAL INJURY ORDEATH!

4. Any additions, changes orconversions required in order forthe unit to satisfactorily meet theapplication needs should be madeby a qualified installer, serviceagency or the gas supplier, usingfactory specified or approved parts.Read your WARRANTY. Contactthe WARRANTOR for conversioninformation. The unit was equippedat the factory for use on NATURALGAS ONLY. Conversion to LP GASrequires a special kit supplied bythe WARRANTOR.

OBSTRUCTION OF THE AIR VENTON AN LP TANK REGULATOR CANCAUSE EXPLOSION OR FIRERESULTING IN SERIOUS PERSONALINJURY, DEATH OR PROPERTYDAMAGE. PERIODICALLY INSPECTAND CLEAN THE AIR VENT SCREENTO PREVENT ANY OBSTRUCTION.KEEP PROTECTIVE REGULATORCOVER IN PLACE, AS EXPOSURETO THE ELEMENTS CAN CAUSE ICEBUILDUP AND REGULATORFAILURE.

5. A gas burner needs an adequatesupply of combustion andventilation air for proper and safeoperation. Do not block or obstructair openings on the unit. Do notplace anything around the unit thatcould block the flow of fresh air tothe unit.

6. Do not use this unit if any part hasbeen under water. Immediately calla qualified installer, service agencyor the gas supplier to inspect theunit and to replace any part of thecontrol system or any gas controlthat has been under water.

DO NOT ALLOW DEBRIS SUCH ASLEAVES, GRASS, WEEDS,SHRUBS, VINES OR SNOWACCUMULATE IN THE AREASURROUNDING THE UNIT,PARTICULARLY IN THE VICINITYOF THE VENT, AIR INTAKE ANDA/C CONDENSER FINS. DOING SOCAN RESULT IN INADEQUATEUNIT PERFORMANCE OR CREATEA FIRE HAZARD RESULTING INPROPERTY DAMAGE, PERSONALINJURY OR DEATH.

7. The combustion air inlet/exhaustoutlet hood and surrounding areaare very hot when operating inheating mode. Do not allowchildren to play on or aroundthe unit.

SYSTEM OPERATIONINFORMATIONAdvice to the Customer1. Keep the filter clean. Your systemwill operate more efficiently andprovide better conditioned air.

2. Arrange your furniture and drapesso that the supply and return airregisters and grilles areunobstructed.

3. Close doors and windows. Thiswill reduce the cooling load onyour system for a moreeconomical operation.

4. Avoid excessive use of exhaustfans.

5. Window shades and awnings willreduce the cooling load.

6. Do not permit the heat generatedby television, lamps or radios toinfluence the thermostatoperation.

7. Except for the mounting platform,keep all combustible articles threefeet from the unit and exhaustsystem.

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8. Unless you plan to remove panelsto service the unit, do notdisconnect the main power to yourunit. This is a safety precaution forthe protection of the compressor.Otherwise, use the thermostatswitches to shut the system off.

9. For extended periods ofinoperation, set the thermostatsystem switch in the “OFF” positionand fan switch in the “AUTO”position.

10. Do not allow the unit to become aplay stand for children.

11. IMPORTANT: Replace all blowerdoors and compartment cover afterservicing the unit. Do not operatethe unit without all panels anddoors securely in place.

12. Do not allow snow or other debristo accumulate in the vicinity of theappliance.

THERMOSTATOPERATIONFor cooling, position the system switchto “Cool” and the fan switch to “Auto.” Ifconstant fan operation is desired, placethe fan switch in the “On” position.

When heating is desired, position thesystem switch to “HEAT” and place thefan switch in the “Auto” position.

During the heating season, the operationof the warm air furnace is automatic. Yourinstalling dealer has provided a wallmounted thermostat which is sensitive tothe change in the temperature of the airmoving around the thermostat. When thetemperature of the air within the heatedspace surrounding the thermostatdecreases, the thermostat switchfunctions to initiate the ignition sequenceand open the gas valve.

The spark ignitor located on the mainburner tray will safely ignite the gas(natural or LP) leaving the main burnerports. After approximately 45 seconds ofburner operation, the blower control willstart the blower. Warm air should nowgently circulate from the supply diffusersthroughout the dwelling and return to thefurnace through return air grille(s).

When the temperature of the circulatingair reaches the temperature setting of thethermostat, the gas valve will reclose, theheat exchanger will cool, and the blowerwill shut off after 90 seconds.

In the cooling mode, the compressor andcirculation air motor are energized upon acall for cooling. When the thermostat issatisfied or turned to the “OFF” position,the compressor is de-energized, but thecirculation air blower continues to operatefor approximately 60 seconds to extractthe residual cooling left in the cooling coil.

We suggest that you experiment withconstant air circulation during theheating and cooling cycles. To achievethis style of operation, place the fanswitch on the thermostat subbase to the“on” position. You may enjoy the comfortassociated with the continuous airmovement, constant air filtration, and thenear even temperature from floor toceiling.

With continuous air circulation, somecondensation on the cooling coil canreevaporate at the end of each cycle andcause a buildup of humidity prior to thenext cooling cycle.

SELECTION OF ROOMTEMPERATUREIt is most important to select thecomfort temperature you desire foreither heating or cooling by use of thethermostat temperature selector.

DO NOT PLAY WITH THETHERMOSTAT. SET IT AND FORGETIT.

If the temperature selection procedureis new to you, ask your installingcontractor to familiarize you with theoperation of the thermostat.

Used on RKNL- with 225,000 BTUH input and above

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FOR YOUR SAFETY, READBEFORE OPERATING

IF YOU DO NOT FOLLOW THESEINSTRUCTIONS EXACTLY, A FIRE OREXPLOSION MAY RESULT CAUSINGPROPERTY DAMAGE, PERSONALINJURY OR LOSS OF LIFE.A. This appliance is equipped with an

ignition device which automaticallylights the burners. Do not try to light theburners by hand.

B. BEFORE OPERATING smell all aroundthe appliance area for gas. Be sure tosmell next to the ground because somegas is heavier than air and will settle onthe ground.WHAT TO DO IF YOU SMELL GAS• Do not try to light any appliance.• Do not touch any electric switch, donot use any phone in your building.

• Immediately call your gas supplierfrom a neighbor’s phone. Follow thegas supplier’s instructions.

• If you cannot reach your gassupplier, call the fire depart-ment.

• Do not return to your home untilauthorized by the gas supplier forfire department.

C. Use only your hand to push in or turnthe gas control knob. Never use tools.If the knob will not push in or turn byhand, don’t try to repair it, call aqualified installer, service agency orthe gas supplier. Force or attemptedrepair may result in a fire orexplosion.

D. Do not use this appliance if any parthas been under water. Immediatelycall a qualified installer, serviceagency or the gas supplier to inspectthe appliance and to replace any partof the control system and any gascontrol valve, electrical components,motors or burners which have beenunder water.

NORMAL FURNACEOPERATING SEQUENCEThis unit is equipped with a two stageintegrated direct spark ignition control.NORMAL HEAT MODEA. Call For First Stage (low fire) Only:1. Zone thermostat contacts close, acall for first stage (low fire) heat isinitiated.

2. Control runs self check.3. Control checks the high-limit switchfor normally closed contacts, eachpressure switch for normally opencontacts, and all flame rolloutswitches for continuity.

4. Control energizes each inducer.5. Control checks each pressure switchfor closure.

6. If each pressure switch is closed, thecontrol starts a 30 second prepurge.If either pressure switch is still open,the inducers will continue to beenergized until closure.

HEATING OPERATION

7. After prepurge timeout, spark isinitiated and gas valve opens for 2seconds minimum, 7 secondmaximum ignition trial, initiates 45second, second stage (high fire)warm up timing.

8. Control detects flame, de-energizesspark and initiates 45 second delayon blower timing. Unit is in a high firewarm up period.

9. After a fixed 45 seconds indoorblower delay on, the controlenergizes the indoor blower.

10. After the 45 second second stagewarmup period control checksthermostat input. If only W1 is calledfor, W2 is de-energized and thecontrol starts a 5 second off delay onW2 inducer.

11. After fixed 5 seconds, the W2inducer is de-energized.

12. Control enters normal operating loopwhere all inputs are continuouslychecked.

13. Zone thermostat is satisfied.14. Control de-energizes gas valve.15. Control senses loss of flame.16. Control initiates 5 second inducer

postpurge and 90 second indoorblower delay off.

17. Control de-energizes inducer blower.18. Control de-energizes indoor blower.

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HONEYWELL VR8305Q4351TWO STAGE GAS VALVE

19. Control in the stand by mode withsolid red LED.

B. Call For Second Stage, After FirstStage Established; Starting fromA.11:

1. If a call for second stage (high fire)is initiated after a call for first stageheat is established, the controlenergizes the W2 inducer andenergizes the second stage of thegas valve.

2. Control enters normal operatingloop where all inputs arecontinuously checked.

C. Second Stage Satisfied; First StageStill Called For; Starting From B.2:

1. Once the call for second stage issatisfied, the control starts a 30second off delay on W2 inducerand reduces the gas valve to firststage.

2. Control enters normal operatingloop where all inputs arecontinuously checked.

D. First Stage Satisfied:1. Zone thermostat is satisfied.2. Control de-energizes gas valve.3. Control senses loss of flame.4. Control initiates 5 second inducerpostpurge and 90 second indoorblower delay off.

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Used on (-)KNL-B090, B102, B120, B150 Modelsw/150,000 BTUH Input

WHITE RODGERS 36G55-523 TWO STAGE GAS VALVE

5. Control de-energizes inducer blower.6. Control de-energizes indoor blower.7. Control in the stand by mode withsolid red LED.

E. First Stage and Second Stage CalledSimultaneously:

1. Zone thermostat contacts close, acall for first stage (low fire) andsecond stage (high fire) heat isinitiated.

2. Control runs self check.3. Control checks the high-limit switchfor normally closed contacts, eachpressure switch for normally opencontacts, and all flame rolloutswitches for continuity.

4. Control energizes each inducer.5. Control checks each pressure switchfor closure.

6. If each pressure switch is closed, thecontrol starts a 30 second prepurge.If either switch is still open, theinducers will continue to beenergized until closure.

7. After prepurge timeout, spark isinitiated and gas valve opens for 2seconds minimum, 7 secondmaximum ignition trial, and initiates45 second stage warm up timing.

8. Control detects flame, de-energizesspark and starts a 45 second indoorblower delay on timing. Unit is in ahigh fire warm up period.

9. After a fixed 45 seconds indoorblower delay on, the controlenergizes the indoor blower.

10. After the 45 second second stagewarmup period control checks thethermostat input. If W1 and W2 ispresent control enters normaloperating loop where all inputs arecontinuously checked.

F. First Stage and Second StageRemoved Simultaneously:

1. Upon a loss of W1 and W2 the gasvalve is de-energized.

2. Upon a loss of flame, each inducerwill complete a 5 second postpurgeand the indoor blower will completea 90 second delay off.

3. Control in the stand by mode withsolid red LED.

The integrated control is a threeignition system.After a total of three cycles withoutsensing main burner flame, the systemgoes into a 100% lockout mode. Afterone hour, the ignition control repeatsthe prepurge and ignition cycles for 3tries and then goes into 100% lockoutmode again. It continues this sequenceof cycles and lockout each hour untilignition is successful or power isinterrupted. During the lockout mode,neither the ignitor or gas valve will beenergized until the system is reset byturning the thermostat to the “OFF”position or interrupting the electrical

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MANUAL RESETOVERTEMPERATURECONTROLManual reset limit controls are locatedon the burner shield. These devicessense blockage in the heat exchangeror insufficient combustion air. Thisshuts off the main burners if excessivetemperatures occur in the burnercompartment.

Operation of this control indicates anabnormal condition. Therefore, the unitshould be examined by a qualifiedinstaller, service agency, or the gassupplier.

DO NOT ATTEMPT TO DEFEATTHIS IMPORTANT SAFETY DEVICE.DO NOT RESET THEOVERTEMPERATURE CONTROLWITHOUT TAKING CORRECTIVEACTION TO ASSURE THAT ANADEQUATE SUPPLY OFCOMBUSTION AIR IS MAINTAINEDUNDER ALL CONDITIONS OFOPERATION AND THAT NO HEATEXCHANGER TUBES AREBLOCKED OR PERFORATED.REPLACE THIS CONTROL ONLYWITH THE IDENTICALREPLACEMENT PART. FAILURE TOADHERE TO THIS WARNING CANRESULT IN PERSONAL INJURY ORDEATH.

TROUBLESHOOTING -HEATINGPROBLEMInsufficient heating —

REMEDYa. Increase temperature setting onthermostat.

b. Check return air filters and change,if necessary.

c. Recheck to assure that all supplyregisters and diffusers are open.

d. Check closing of all doors andwindows.

e. Check that blower compartmentdoors are in place.

f. Call your servicing contractor.

6. Wait five (5) minutes to clear out anygas. Then smell for gas, includingnear the floor. If you smell gas,STOP! Follow B in the safetyinformation on the OperatingInstructions located on the back ofthe controls/access panel. If youdon’t smell gas, go to the next step.

7. Move the gas control knob from“OFF” position to “ON” position.Operate this appliance with the gascontrol knob in the “ON” positiononly. Do not use the gas control knobas a means for throttling the burnerinput rate.

8. Replace the control door.9. Turn on all electric power to theappliance.

10. Set the thermostat to the desiredsetting.

11. If the appliance will not operate,follow the instructions below on howto shut down the furnace.

THE SPARK IGNITOR AND IGNITIONLEAD FROM THE IGNITIONCONTROL ARE HIGH VOLTAGE. KEEPHANDS OR TOOLS AWAY TOPREVENT ELECTRICAL SHOCK.SHUT OFF ELECTRICAL POWERBEFORE SERVICING ANY OF THECONTROLS. FAILURE TO ADHERETO THIS WARNING CAN RESULT INPERSONAL INJURY OR DEATH.The initial start-up on a new installationmay require the control system to beenergized for some time until air has bledthrough the system and fuel gas isavailable at the burners.TO SHUT DOWN FURNACE1. Set the thermostat to the lowestsetting.

2. Turn off all electric power to theappliance if service is to beperformed.

3. Remove control door.4. Move control knob to the “OFF”position.

5. Replace control door.

SHOULD OVERHEATING OCCUR ORTHE GAS SUPPLY FAIL TO SHUT OFF,SHUT OFF THE MANUAL GAS VALVETO THE APPLIANCE BEFORESHUTTING OFF THE ELECTRICALSUPPLY. FAILURE TO DO SO CANRESULT IN AN EXPLOSION OR FIRECAUSING PROPERTY DAMAGE,SEVERE PERSONAL INJURY ORDEATH!

power to the unit for 3 seconds or longer.The induced draft blower and mainburner will shut off when the thermostatis satisfied.The circulating air blower will start andrun on the heating speed if thethermostat fan switch is in the “ON”position.The integrated furnace control isequipped with diagnostic LED. The LEDis lit continuously when there is power tothe control, with or without a call for heat.If the LED is not lit, there is either nopower to the control or there is aninternal component failure within thecontrol, and the control should bereplaced.If the control detects the followingfailures, the LED will flash on forapproximately 1/4 second, then off for3/4 second for designated failuredetections.1 Flash: Failed to detect flame within the

three tries for ignition.2 Flash: Pressure switch or induced draft

blower problem detected.3 Flash: High limit or auxiliary limit open.4 Flash: Flame sensed and gas valve

not energized or flame sensedwith no “W” signal.

5 Flash: Overtemperature switch open.

OPERATING INSTRUCTIONSThis appliance is equipped withintegrated furnace control. This devicelights the main burners each time theroom thermostat (closes) calls for heat.See operating instructions on the back ofthe furnace/controls access panel.

DO NOT ATTEMPT TO MANUALLYLIGHT THIS FURNACE WITH AMATCH OR ANY OPEN FLAME.ATTEMPTING TO DO SO CAN CAUSEAN EXPLOSION OR FIRE RESULTINGIN PROPERTY DAMAGE, PERSONALINJURY OR DEATH.TO START THE FURNACE1. Set the thermostat to its lowestsetting.

2. Turn off all electric power to theappliance.

3. This appliance does not have a pilot.It is equipped with an ignition devicewhich automatically lights the burner.Do not try to light the burner by hand.

4. Remove control door.5. Move control knob to the “OFF”position. Turn the knob by hand only,do not use any kind of tool.

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COOLING OPERATIONTo Operate Cooling SystemTo Start: Set thermostat at desiredsetting with system switch on “Cool”and fan switch on “Auto” or “On”position.

To Shut Down: Set thermostat to “Off”position.

SEQUENCE OF OPERATION- COOLING1. Thermostat calls for cooling.

2. Compressor, condenser fan motor,and circulation air blower areenergized.

3. Thermostat is satisfied and opens.

4. Compressor and condenser fanmotor are de-energized.

5. Circulation air blower is de-energized after 60 seconds.

GENERAL INFORMATION -COOLING1. If your outdoor unit is equipped withan optional external manual highpressure switch reset button, haveyour servicing contractor familiarizeyou with its location. Many modelshave compressors equipped withinternal pressure relief valves usingan automatic reset featureeliminating the need for an externalcontrol. This high pressure switchor the relief valve will open underexcessive high pressures to protect

the compressor. Some models withinternal relief valves will requirepower interruption prior to resettingitself. The high refrigerant pressuremay be due to a temporarycondition, so if your unit is equippedwith a reset button, you may reset itas required. However, if theproblem persists, refer to Item 3,and/or refer the problem to yourservicing contractor.

2. If the condenser coil is allowed tobecome restricted by dirt, lint,paper, grass clippings, leaves, etc.,the system efficiency will suffer andabnormally high refrigerantoperating pressures will result. Tocorrect this condition, be sure tofirst cut off power to the unit andthen clean such material from thecondenser coil and cabinet. Using agarden hose with a nozzle can beeffective in cleaning the condensercoil, but the water should besprayed from the inside to outsideof the coil in the opposite directionfrom the normal airflow. Disconnectthe main power before washing thecoil.

3. If you know or suspect that thecompressor s not working, youshould place the thermostat systemswitch on the thermostat subbaseto the “Off” position. This will stopthe operation of thecompressor/condenser unit.

4. If you suspect that a coolingproblem has developed with yoursystem and before you advise youservicing contractor, we suggestyou check the following servicehints.

TROUBLESHOOTING -COOLING

PROBLEMNo cooling —

REMEDYa. Set thermostat correctly.b. Reset high pressure switch onunit.

c. Check fusing or circuit breakersserving unit.

d. Call servicing contractor.

PROBLEMInsufficient cooling —

Unit operates continuously

REMEDYa. Check air filters.b. Check for blocked return airsystem.

c. Check to see if supply registershave been closed.

d. Check for open doors andwindows.

e. Call your servicing contractor.

Please do not attempt any servicingoperation with which you are notfamiliar or experienced unless youare advised by your servicingcontractor of the proper procedures.

ROUTINE MAINTENANCE

DISCONNECT MAIN ELECTRICALPOWER TO THE UNIT BEFOREATTEMPTING ANY MAINTENANCE.FAILURE TO DO SO CAN RESULT INSEVERE ELECTRICAL SHOCK ORDEATH.

Routine maintenance to be providedby a qualified installer, serviceagency or the gas supplier ONLY.

COMBUSTION AREA ANDEXHAUST SYSTEM1. It is recommended that an annualinspection of your furnace be doneby a qualified installer, serviceagency or the gas supplier.

2. Turn OFF the electrical supply tothe furnace and remove the accessdoors.

3. Inspect the gas burners and burnercompartment for dirt, rust, or scale.

IF DIRT, RUST, SOOT OR SCALEACCUMULATIONS ARE PRESENT,DO NOT OPERATE THIS FURNACE.INSPECT THE HEAT EXCHANGERSFOR LEAKS. LEAKS CAN CAUSETOXIC FUMES TO ENTER THEHOME AND CAUSE INJURY ORDEATH.

4. Inspect the exhaust area inside andoutside the appliance including theexhaust transition piece and theexhaust hood. Be sure that theexhaust transition piece (inside theappliance) and the hood are inplace and are physically sound,without holes or excessivecorrosion. If these componentshave deteriorated, have a qualifiedservice professional replace them

using factory specified orapproved replacement parts only.

5. Be sure that the return air ductconnections are physically soundand are sealed to the unit.

6. Look for obvious signs ofdeterioration of the unit.

7. If the unit is free of the aboveconditions, replace all accessdoors, except furnace accesspanel, and restore electricalpower to the unit.

8. Make sure control box cover is inplace. Start the furnace andobserve its operation. Watch theburner flames to see if they arebright blue. If a suspectedmalfunction is observed, or theburner flames are not bright blue,apply appropriate service.

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EXAMINATION OFINSTALLATION1. The combustion air inlets andcombustion air outlets must beclear and free of obstructions.

2. The return and supply ductconnections should be physicallysound and sealed where theyconnect to the unit.

3. Check for obvious signs ofdeterioration of the unit.

4. CONDENSATE DRAIN — Checkannually and, if necessary, cleandrain pan and drain line. In winter,keep drain and trap dry or protectagainst freeze-up.

5. The blower compartment and motorshould be inspected and cleanedperiodically by your qualifiedinstaller, service agency or the gassupplier to prevent the possibility ofoverheating due to an accumulationof dust and dirt on the windings oron the motor exterior. And, assuggested elsewhere in theseinstructions, the air filters should bekept clean because dirty filters canrestrict airflow and the motordepends upon sufficient air flowingacross and through it to keep fromoverheating.

6. Perform the examination annuallyto insure proper operation.

FILTER MAINTENANCEHave your qualified installer, serviceagency or the gas supplier instruct youon how to access your filters for regularmaintenance.

DISCONNECT THE MAIN POWER TOTHE OUTDOOR UNIT BEFOREATTEMPTING ANY MAINTENANCEOPERATION. FAILURE TO DO SOCAN RESULT IN SEVEREELECTRICAL SHOCK OR DEATH.

1. Keep air filters clean. There areseveral types of material used in airfilters and there are many possiblelocations for air filters. Consult withyour contractor as to the locationsof the filters and type of material inuse.

2. How To Clean:

Glass Fiber (Throwaway) — Thisis a disposable type of filter. Inspectmonthly and replace when

8 CM 0808

! WARNING

necessary. A new home or buildingwill normally require more frequentattention to the filters.

Aluminum Mesh — Wash withdetergent and water. Air drythoroughly and renew the coating incompliance with the manufacturer’sinstructions.

Plastic Impregnated Fiber —Wash with detergent and water orvacuum clean, then reinstall.

IMPORTANT: Do not operate yoursystem for extended periodswithout filters, as the dust entrainedin the air may pack into the fin areaof the evaporator coil creating acondition which could requireextensive repairs.

A PORTION OF THE DUSTENTRAINED IN THE AIR MAYTEMPORARILY LODGE IN THE AIRDUCT RUNS AND AT THE SUPPLYREGISTERS. ANY RECIRCULATEDDUST PARTICLES WILL BE HEATEDAND CHARRED BY CONTACT WITHTHE FURNACE HEAT EXCHANGER.THIS RESIDUE WILL SOIL CEILINGS,WALLS, DRAPES, CARPETS, ANDOTHER HOUSEHOLD ARTICLES.

LUBRICATIONIMPORTANT: DO NOT attempt tolubricate the bearings on the blowermotor or the induced draft blowermotor. Addition of lubricants can reducethe motor life and void the warranty.

The blower motor and induced draftblower motor are prelubricated by themanufacturer and do not require furtherattention.

The blower motor and induced draftblower motor must be cleanedperiodically by a qualified installer,service agency, or the gas supplier toprevent the possibility of overheatingdue to an accumulation of dust and dirton the windings or on the motorexterior. And, as suggested elsewherein these instructions, the air filters canrestrict airflow. The motor dependsupon sufficient air flowing across andthrough it to keep from overheating.

PROTECTINGEQUIPMENT FROM THEENVIRONMENTThe metal parts of this unit may besubject to rust or deterioration inadverse environmental conditions.This oxidation could shorten theequipment’s useful life. Salt spray,fog or mist in seacoast areas,sulphur or chlorine from lawnwatering systems, and variouschemical contaminants fromindustries such as paper mills andpetroleum refineries are especiallycorrosive.

DISCONNECT ALL POWER TOUNIT BEFORE STARTINGMAINTENANCE. FAILURE TO DOSO CAN RESULT IN SEVEREELECTRICAL SHOCK OR DEATH.

1. Avoid having lawn sprinklerheads spray directly on the unitcabinet.

2. Frequent washing of the cabinet,fan blade and coil with freshwater will remove most of the saltor other contaminants that buildup on the unit.

3. Regular cleaning and waxing ofthe cabinet with a goodautomobile polish will providesome protection.

4. A good liquid cleaner may beused several times a year toremove matter that will not washoff with water.

Several different types of protectivecoatings are offered in some areas.These coatings may provide somebenefit, but the effectiveness of suchcoating materials cannot be verifiedby the equipment manufacturer.

The best protection is frequentcleaning, maintenance andminimal exposure tocontaminants.

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