User Info - Johnstone Supply
Contents
1. HEAT or AUTO This control can also be reset by turning the thermostat setting down and then back to the normal setting The ignition control will close the gas valve and terminate spark if proof of ignition is not provided by the flame sensor within 4 to 7 seconds The ignition control will allow 15 seconds of ventor fan operation and then try another ignition sequence If the second ignition sequence fails the ignition control will try a third sequence and if that fails the control will lockout for an hour or must be reset as described above Some of the conditions that can cause ignition failure are loss of gas supply blockage of combustion air or flue passage or malfunction within the burner compartment 2 TEMPERATURELIMIT CONTROLS A Furnace Limit Automatic Reset The furnace limit control will terminate furnace operation if the discharge air temperature exceeds the established limit setting The limit will reset and allow the furnace to resume operation after a short off period Some of the conditions that can cause the limit to trip are low air flow loose belts restricted ducts or dirty filters B Burner Roll Out Limit Manual reset required at unit located in burner compartment above burners The burner roll out limit control will terminate furnace opera tion if the burner compartment temperature exceeds the established limit setting Some of the conditions that can cause the limit to trip are extremes in2. and maintained in accordance with the manufacturer s instructions this product could expose you to substances in fuel combustion which can cause death or serious illness and which are known to the State of California to cause cancer birth defects or other reproductive harm This product contains fiberglass insulation Fiberglass insulation contains a chemical known by the State of California to cause cancer FOR YOUR SAFETY or any other appliance Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this B14933 247 For convenience record the Model Manufacturing Number and Serial Number of the unit found on the nameplate of the furnace MODEL NUMBER CONSUMER INFORMATION LINE TOLL FREE 1 877 254 4729 U S only email us at customerservice goodmanmfg com fax us at 731 856 1821 Not a technical assistance line for dealers Outside the U S call 1 713 861 2500 Not a technical assistance line for dealers Your telephone company will bill you for the call 2005 Goodman Manufacturing Company L P November 2005
3. ATMOSPHERE CONTAMINATED WITH HALOGENATED HYDROCARBON VAPORS SOLVENT VAPORS OR ACID VAPORS EXPOSURE TO THESE ATMOSPHERES MAY CAUSE SEVERE DAMAGE TO THE GAS FURNACE AND RESULT IN IMPROPER OR DANGEROUS OPERATION OPERATION OF THE GAS FURNACE IN SUCH A CONTAMINATED ATMOSPHERE CONSTITUTES PRODUCT ABUSE IMPORTANT NOTE TO THE OWNER Your warranty certificate is supplied with the unit Read the warranty carefully and note what is covered Keep the warranty certificate in a safe place so you can find it if necessary Before using this manual check the serial plate for proper model identification The installation and servicing of this equipment must be performed by qualified experienced technicians only SAFETY INSTRUCTIONS d WARNING THIS FURNACE IS EQUIPPED WITH AN ELECTRIC IGNITION DO NOT ATTEMPT TO LIGHT THE FURNACE MANUALLY WITH A MATCH OR OTHER d WARNING THIS PRODUCT CONTAINS OR PRODUCES A CHEMICAL OR CHEMICALS WHICH MAY CAUSE SERIOUS ILLNESS OR DEATH AND WHICH ARE KNOWN TO THE STATE OF CALIFORNIA TO CAUSE CANCER BIRTH DEFECTS OR OTHER REPRODUCTIVE HARM d WARNING TO AVOID POSSIBLE EQUIPMENT DAMAGE PERSONAL INJURY FIRE OR DEATH THE FOLLOWING INSTRUCTIONS MUST BE OBSERVED REGARDING UNIT LOCATION AIR REQUIREMENTS AND OPERATING PROCEDURES d WARNING HEATING UNIT SHOULD NOT BE UTILIZED WITHOUT REASONABLE ROUTINE INSPECTION MAIN
4. EPARTMENT B Use only your hand to push in or turn the gas control knob NEVER use tools If the knob will not push in orturn by hand don t try to repair it call a qualified service technician Force or attempted repair may result in a fire or explosion UNIT LOCATION Theseunits are designed for outdoor installation only either on a slab just above ground level or on a rooftop The unit should be protected from access by unauthorized persons or children At no time should an enclosure be constructed around the unit that will prevent free air circulation or interfere with venting the flue discharge An enclosure overhang or obstruction shall not be placed above the unit Units installed next to a wall are likely to experience backdrafts from adjacent walls FURNACE AIR ANDFLUE VENTING REQUIREMENTS The furnace requires air for combustion of the gas Therefore DO NOT block or obstruct the air or vent openings to the furnace Keep the area surrounding the furnace free from debris and snow A vent stack is not required and must never be used d caution Do NOT INSTALL UNIT NEXT TO WINDOWS RECOMMENDED CLEARANCES As shown in Figure 1 a 36 clearance must be maintained on the furnace access side of the unit This clearance must be maintained for accessibility and to allow proper combustion air and flue gas flow This clearance must be kept free of any combustible material AIR INTAKE
5. FURNACE FLUE DISCHARGE NOTE UNIT FOOTPRINT IS 74 x 74 9 Figure 1 Service Clearances It is recommended that a 75 clearance be maintained on the furnace access side of the unit to facilitate possible furnace or blower shaft removal t is recommended that at least 48 clearance be maintained around the other three sides of the unit to facilitate air circulation and to allow service access to the unit filters and mechanical components These clearances are greater than those shown on the unit dataplate which are minimum clearances to combustible sur faces for safety OPERATING INSTRUCTIONS d WARNING HIGH VOLTAGE Disconnect ALL POWER BEFORE INSTALLING OR SERVICING MULTIPLE POWER SOURCES MAY BE PRESENT FAILURE TO DO SO MAY CAUSE PROPERTY DAMAGE PERSONAL INJURY OR DEATH STOP Read all safety information Set thermostat or heat control to lowest setting Turn off all electric power to the disconnect switch 2 MS This appliance is equipped with an ignition device which automatically lights the burners DO NOT try to light by hand 5 Remove control access panel to expose gas control if neces Sary 6 Turn gas control switch or knob clockwise to OFF NOTE The White Rodgers valve cannot be turned to OFF unless the knob is pushed in slightly at the black mark Do not force 7 Wait five 5 minutes to clear out any gas If you then smell gas STOP Follow st
6. GAS FIRED FURNACE PACKAGED ROOFTOP SYSTEMS MODELS PGB amp PGC 090 180 USER S INFORMATION MANUAL d warnine C lj VICINITY OF THIS APPLIANCE WHAT TO DO IF YOU SMELL GAS Liste SUPPLIER S INSTRUCTIONS IF THE INFORMATION IN THESE INSTRUCTIONS IS NOT FOLLOWED EXACTLY A FIRE OR EXPLOSION MAY RESULT CAUSING PROPERTY DAMAGE PERSONAL INJURY OR LOSS OF LIFE TO PREVENT THE RISK OF PROPERTY DAMAGE PERSONAL INJURY OR DEATH DO NOT STORE COMBUSTIBLE MATERIALS OR USE GASOLINE OR OTHER FLAMMABLE LIQUIDS OR VAPORS IN THE DO NOT TRY TO LIGHT ANY APPLIANCE Do NOT TOUCH ANY ELECTRICAL SWITCH DO NOT USE ANY PHONE IN YOUR BUILDING IMMEDIATELY CALL YOUR GAS SUPPLIER FROM A NEIGHBOR S PHONE FOLLOW THE GAS IF YOU CANNOT REACH YOUR GAS SUPPLIER CALL THE FIRE DEPARTMENT INSTALLATION AND SERVICE MUST BE PERFORMED BY A QUALIFIED INSTALLER SERVICE AGENCY OR THE GAS SUPPLIER ONLY INDIVIDUALS MEETING THE REQUIREMENTS OF AN ENTRY LEVEL TECHNICIAN AS SPECIFIED BY THE AIR CONDITIONING AND REFRIGERATION INSTITUTE ARI MAY USE THIS INFORMATION ATTEMPTING TO INSTALL OR REPAIR THIS UNIT WITHOUT SUCH BACKGROUND MAY RESULT IN PRODUCT DAMAGE PERSONAL INJURY OR DEATH C US amp i STEP Installer Affix this manual Installation Guide and Warranty adjacent to the appliance Owner Headandkeepallproduct literature in a safe place for future reference d WARNING SHO
7. LTER INSTALLED BECAUSE DUST AND LINT WILL BUILD UP ON INTERNAL PARTS RESULTING IN LOSS OF EFFICIENCY EQUIPMENT DAMAGE AND POSSIBLE FIRE Every application may require a different frequency of replacement of dirty filters Filters must be inspected cleaned or changed every three months or as required As a homeowner it is your personal responsibility to keep air filters clean Remember that dirty filters are the most common cause of inadequate heating or cooling performance Filters supplied with the units are the disposable type and are as follows UNIT QTY FILTER PART NUMBER SIZE SIZE ONE FILTER 090 102 25X25X2 B1369612 Become familiar with filter location and procedures for removing cleaning and replacing them If you need assistance contact the installer of your furnace or another qualified servicer TO REPLACE FILTERS Remove the filter access panel on either or both sides of the unit See Figure 8 Filters are three deep and slide in and out Always replace the panels and screws before operating the unit Disposable filters must be replaced with a filter or filters of the same size as that which is removed Filters must comply with UL900 or CAN ULC S111 Standards When reinstalling filters be careful to maintain correct airflow direction 120 180 Figure 8 Filter Access LUBRICATION To lubricate the ventor motor remove the furnace access panel Lubricate the motor in two locations as shown in Fi
8. RODUCTION The intent of this bulletin is to acquaint the user with some of the mechanical features and adjustments of the rooftop gas fired air conditioning units In addition the information contained in this manual is designed to identify any hazards and to serve as a guide to the user in the event of any malfunctions DO SANDDONOT S DO read the User s Manual and Installation Instructions before operating the unit DO have your heating and cooling unit serviced at least once a year It is strongly recommended that the unit be inspected and serviced by a qualified service agency at the beginning of each heating and cooling season NOTE Additional periodic maintenance is recommended Refer to Maintenance section DO NOT attempt to alter the unit DO NOT block or obstruct the furnace air inlets or outlets DO NOT tamper with the internal fan and limit control mechanisms DO NOT use any type of fuel other than indicated on the unit s nameplate SAFETY SicNAL Worps Dear Homeowner please recognize the following safety informa tion This information will alert you to the potential for personal injury Adwarnine Indicate hazards or unsafe practices which COULD result in property damage product damage personal injury or death caution Indicate hazards or unsafe practices which MAY result in in property damage product damage personal injury or death d WARNING FURNACE MUST NOT BE OPERATED IN AN
9. TENANCE AND SUPERVISION IF THE BUILIDNG IN WHICH ANY SUCH DEVICE IS LOCATED WILL BE VACANT CARE SHOULD BE TAKEN THAT SUCH DEVICE IS ROUTINELY INSPECTED MAINTAINED AND MONITORED IN THE EVENT THAT THE BUILDING MAYBE EXPOSED TO FREEZING TEMPERATURES AND WILL BE VACANT ALL WATER BEARING PIPES SHOULD BE DRAINED THE BUILDING SHOULD BE PROPERLY WINTERIZED AND THE WATER SOURCE CLOSED IN THE EVENT THAT THE BUILDING MAY BE EXPOSED TO FREEZING TEMPERATURES AND WILL BE VACANT ANY HYDRONIC COIL UNITS SHOULD BE DRAINED AS WELL AND IN SUCH CASE ALTERNATIVE HEAT SOURCES SHOULD BE UTILIZED LIGHTING MEANS A BEFORE OPERATING itis recommended to use aleak detector to check for gas leaks If one is not available smell all around the appliance area for gas Be sure to smell next to the floor because some gas is heavier than air and will settle to the floor d WARNING AN UNDETECTED GAS LEAK WILL CREATE A DANGER OF EXPLOSION OR FIRE IF THE PRESENCE OF GAS IS SUSPECTED FOLLOW THE INSTRUCTIONS ON THE COVER OF THIS MANUAL FAILURE TO DO SO COULD RESULT IN SERIOUS PERSONAL INJURY OR DEATH d WARNING WHAT TO DO IF YOU SMELL GAS DO NOT TRY TO LIGHT ANY APPLIANCE DO NOT TOUCH ANY ELECTRICAL SWITCH DO NOT USE ANY PHONE IN YOUR BUILDING IMMEDIATELY CALL YOUR GAS SUPPLIER FROM A NEIGHBOR S PHONE FOLLOW THE GAS SUPPLIER S INSTRUCTIONS IF YOU CANNOT REACH YOUR GAS SUPPLIER CALL THE FIRE D
10. ULD OVERHEATING OCCUR OR THE GAS SUPPLY FAIL TO SHUT OFF SHUT OFF THE MANUAL GAS VALVE TO THE FURNACE BEFORE SHUTTING OFF THE ELECTRICAL SUPPLY d WARNING HIGH VOLTAGE Disconnect ALL PowER BEFORE INSTALLING OR SERVICING MULTIPLE POWER SOURCES MAY BE PRESENT FAILURE TO DO SO MAY CAUSE PROPERTY DAMAGE PERSONAL INJURY OR DEATH d WARNING PRODUCT CONTAINS FIBERGLASS WOOL DISTURBING THE INSULATION IN THIS PRODUCT DURING INSTALLATION MAINTENANCE OR REPAIR WILL EXPOSE YOU TO FIBERGLASS WOOL BREATHING THIS MAY CAUSE LUNG CANCER FIBERGLASS WOOL IS KNOWN TO THE STATE OF CALIFORNIA TO CAUSE CANCER FiBERGLASS WOOL MAY ALSO CAUSE RESPIRATORY SKIN AND EYE IRRITATION To REDUCE EXPOSURE OR FOR FURTHER INFORMATION CONSULT MATERIAL SAFETY DATA SHEETS AVAILABLE FROM ADDRESS SHOWN BELOW d WARNING TO AVOID PROPERTY DAMAGE PERSONAL INJURY OR DEATH DO NOT USE THIS FURNACE IF ANY PART OF THE FURNACE HAS BEEN UNDER WATER IMMEDIATELY CALL A QUALIFIED SERVICE TECHNICIAN TO INSPECT THE FURNACE AND TO REPLACE ANY PART OF THE CONTROL SYSTEM AND ANY GAS CONTROL HAVING BEEN UNDER WATER A RECOGNIZE THIS SYMBOL AS A SAFETY PRECAUTION Due to policy of continual product improvement the right is reserved to change specifications and design without notice Part No HI 118 Printed in USA 2005 Goodman Manufacturing Company L P Effective November 2005 INT
11. arge by engagement of the panel sleeve into the fan outlet sleeve Be sure that these sleeves are always in place and engaged to maintain safe furnace operation J SCREWS Figure 3 Furnace Access Panel BURNER ASSEMBLY The burner assembly is removable for service or replacement of the gas valve The assembly consists of the following major parts See Figure 4 A Gas Valve B Gas Manifold Gas Orifices Burners Carry Over Tube Carry Over Orifice Ignitor Electrode Flame Sensor Electrode qQq Qinm vo qo Burner Support The burner assembly must always be aligned and securely fas tened in place with the upper and lower screws Figure 4 Burner Assembly BURNERFLAME REQUIREMENTS The flame exits from the burner in a tubular shape and enters the furnace heat exchanger The flame should be blue in color and should not lift away from the end of the burner If the flame rolls out rather than entering the heat exchanger the heat exchanger flue passages and ventor assemblies may require inspection or cleaning The carry over tube has a small flame approximately one half inch long and operates continuously during burner operating Refer to Maintenance section in the installation instructions IO 156 for cleaning procedure BURNER r L HEAT P EXCHANGER VENTURI TUBE SHIELD PANEL CARRY OVER FLAME Figure 5 Burner Flame PRIMARY AIR ADJUSTMENT The primary air shutters are fa
12. ctory set and normally do not require adjustment If shutters are adjusted no visible changes in the flame appearance will occur One of two types of burners will be provided with the furnace The shutters should be set and secured as shown in Figure 6 or 7 Ye NORMAL POSITION 7 E LOCKING SCREW AIR SHUTTER Figure 6 Type Burner LOCKING SCREW am AIR SHUTTER NORMAL POSITION 100 OPEN Figure 7 Type Il Burner ROUTINE MAINTENANCE Maintenance is to be performed by a qualified service technician only User maintenance is to be restricted to frequent air filter changes and to ensure the warnings and notices found elsewhere in this manual be followed We recommend that at a minimum System maintenance be performed by a qualified service techni cian prior to the beginning of each heating season and if equipped with air conditioning prior to that season FILTERS d WARNING PERSONAL INJURY OR DEATH MAY RESULT FROM IMPROPER MAINTENANCE PERFORMED BY UNTRAINED PERSONNEL CALL YOUR INSTALLING DEALER OR OTHER QUALIFIED SERVICE COMPANIES TO PERFORM THE MAINTENANCE INSPECTION d WARNING TO AVOID PERSONAL INJURY OR DEATH DUE TO ELECTRICAL SHOCK DISCONNECT THE ELECTRICAL POWER BEFORE PERFORMING ANY MAINTENANCE d WARNING TO AVOID PROPERTY DAMAGE PERSONAL INJURY OR DEATH DISCONNECT ELECTRICAL POWER BEFORE REMOVING FILTERS NEVER OPERATE FURNACE WITHOUT A FI
13. ctric switch do not use any telephone in your building Immediately call your supplier from a neighbor s phone Follow the gas suppliers instructions BEEN OPERATING INSTRUCTIONS 1 STOP Read the safety information above on this label 2 Set the thermostat to lowest setting 3 Turn off all electric power to the appliance 4 This appliance is equipped with an automatic ignition system which automatically lights the burners Do not try to light the burners by hand 5 Remove control access panel 6 Move the gas control switch or knob to OFF GAS CONTROL SWITCH SHOWN IN ON POSITION GAS CONTROL E KNOB DER O TURN OFF GAS TO APPLIANCE 1 Set the thermostat to its lowest setting 2 Turn off all electric power to the appliance if service is to be performed 3 Remove control access panel olf you cannot reach your gas supplier call the fire department C Use only your hand to move the gas control switch or knob Never use tools If the gas control switch or knob will not operate don t try to repair it call a qualified service technician Force or attempted repair may result in a fire or explosion D Do not use this appliance if any part has been under water Immediately call a qualifi
14. ed service technician to inspect the appliance and to replace any part of the control system and any gas control which has been under water 7 Wait five 5 minutes to clear out any gas If you then smell gas STOP Follow B in the safety information above on this label If you don t smell gas go to the next step 8 Move the gas control switch or knob to ON 9 Replace control access panel 10 Turn on all electric power to the appliance 11 Set the thermostat to the desired setting 12 If the appliance will not operate follow the instructions To Turn Off Gas To Appliance and call your service technician or gas supplier GAS CONTROL SWITCH SHOWN IN ON POSITION 4 Move the gas control switch or knob to OFF Do not force 5 Replace control access panel WARNING Improper installation adjustment alteration service or maintenance can cause injury or property damage Hefer to the user s information manual provided with this furnace For assistance or additional information consult a qualified installer service agency or the gas supplier This furnace must be installed in accordance with the manufacturers instructions and local codes In the absence of local codes follow the National Fuel Gas Code ANSI Z223 1 For outdoor installation only WARNING _ If not installed operated
15. ep A in Safety Instructions If you don t smell gas go to next step 8 Turn gas control switch or knob counterclockwise to ON The knob has a safety latch to prevent accidental repositioning to ON The knob will hit a stop before it reaches ON To continue to turn the knob to ON the Honeywell valve knob must be pushed down or the White Rodgers valve knob must be re leased to allow it to POP UP then continue turning to ON 9 Replace control access panel DO NOT omit any screws when replacing panel d WARNING EXCEPT DURING BRIEF PERIODS WHEN GAS PRESSURES ARE BEING MEASURED BY QUALIFIED SERVICE PERSONNEL THE FURNACE ACCESS PANEL MUST BE IN PLACE AT ALL TIMES WHEN FURNACE IS OPERATING 10 Turn on all electric power to the appliance 11 Set thermostat or controller to desired setting 12 If the appliance will not operate follow the instructions To Turn Off Gas To Appliance and call your service technician or gas supplier TOTURNOFF GASTO APPLIANCE d WARNING HIGH VOLTAGE Disconnect ALL PowER BEFORE INSTALLING OR SERVICING MULTIPLE POWER SOURCES MAY BE PRESENT FAILURE TO DO SO MAY CAUSE PROPERTY DAMAGE PERSONAL INJURY OR DEATH Set the thermostat or controller to lowest setting or tun off power at switch m Turn off all electrical power to the appliance if service is to be performed 3 Remove control access panel Turn gas control s
16. for proper ignition burner flame and flame sense Flames should extend directly outward from burners without curling floating or lifting off Wiring Check electrical connections for tightness and or cor rosion Check wires for damage Filters Check that filters are clean and in the proper place ment in the furnace or duct system e Remove the furnace access panel and visually inspect the burner area and vent fan outlet for corrosion corrosion par ticles or soot There should be no obvious signs of deterioation of the furnace If any evidence of deterioration is observed contact a qualified service agency NOTE Information regarding the inspection and cleaning of the burners and flue gas passagemways is included in the Mainte nance section of the Installation Instructions IO 156 SAFETY LABELS E FOR YOUR SAFETY READ BEFORE OPERATING mm If you do not follow these instructions exactly a fire or explosion may result causing property damage personal injury or loss of life A This appliance does not have a pilot It is equipped with an ignition device which automatically lights the burners Do not try to light the burners by hand B BEFORE OPERATING smell around the appliance area for gas Be sure to smell next to the floor because some gas is heavier than air and will settle on the floor WHAT TO DO IF YOU SMELL GAS o Do not try to light any appliance Do not touch any ele
17. gas pressure blockage of combustion air or flue discharge a malfunction within the burner compartment or operation of the furnace with the access panel removed C Reverse Airflow Limit Automatic reset required at unit located in blower compart ment on side opposite blower motor and drive The reverse airflow limit will terminate furnace operation if the blower and filter compartment temperature exceeds the estab lished limit setting Some of the conditions that can cause the limit to trip are loss of airflow from duct blockage loss of drive belts or tripping of the blower motor overloads d warnine HIGH VOLTAGE Disconnect ALL POWER BEFORE ATTEMPTING TO RESET MANUAL LIMIT CONTROLS MULTIPLE POWER SOURCES MAY BE PRESENT FAILURE TO DO SO MAY CAUSE PROPERTY DAMAGE PERSONAL INJURY OR DEATH FURNACE ACCESS PANEL d WARNING HIGH VOLTAGE THE FLAME SENSOR AND IGNITOR ELECTRODES CARRY VERY HIGH VOLTAGE DiscouNEcT ALL POWER BEFORE SERVICING UNIT MULTIPLE POWER SOURCES MAY BE PRESENT FAILURE TO DO SO MAY CAUSE PROPERTY DAMAGE PERSONAL INJURY OR DEATH d WARNING EXCEPT DURING BRIEF PERIODS WHEN GAS PRESSURES ARE BEING MEASURED BY QUALIFIED SERVICE PERSONNEL THE FURNACE ACCESS PANEL MUST BE IN PLACE AT ALL TIMES WHEN FURNACE IS OPERATING Always replace the screws that hold the door in place The access panel seals to the furnace ventor fan disch
18. gure 9 Use SAE 20W lubricant and add five drops to each location The motor should be lubricated at the beginning of each heating season DO NOT OVERLUBRICATE d WARNING Do NOT DRIP OIL ON THE GAS VALVE THE OIL MAY DAMAGE THE NON METALLIC PARTS AND RENDER THE VALVE INOPERABLE REMOVE ANY OIL RESIDUES FROM THE BURNER COMPARTMENT OIL HOLES Figure 9 Ventor Motor INSTRUCTIONS FOR PERIODIC INSPECTION OF THE FURNACE d WARNING IMPROPER INSTALLATION ADJUSTMENT ALTERATION SERVICING OR MAINTENANCE CAN CAUSE PROPERTY DAMAGE PERSONAL INJURY OR DEATH ANNUAL INSPECTION The furnace should be inspected by a qualified installer or service agency at least once per year This check should be performed at the beginning of the heating season and periodically during the season This will insure that all furnace components are in proper working order and that the heating system functions appropriately Particular attention should be paid to the following items Repair as necessary e The physical support of the furnace should be sound without sagging cracks gasp etc around the base to provide a seal between the support and the base e Flue pipe system Check for blockage and or leakage Check the outside termination and the connections at and internal to the furnace e The return air duct connection should be physically sound and sealed to the furnace casing Burners Check
19. r confirms that ignition of the burner has occurred and terminates the spark 6 The furnace is now operating on low stage fire Increasing the thermostat setting or a further drop in room temperature energizes the second heat stage 8 The gas valve slowly opens to the high stage 15 to 30 seconds 9 The furnace is now operating at full heat output Lowering the thermostat setting or an increase in room tem perature will de energize the high stage 11 The high stage gas valve slowly closes and the furnace operates on low stage Lowering the thermostat setting further or a further increase in room temperature will de energize the low heating stage 13 14 The ventor fan is de energized 15 The gas valve closes and combustion is terminated The unit circulating blow control begins timing and terminates operation of the blower in 120 to 150 seconds FAILURE OF THEFURNACETO OPERATE The furnace is provided with several safety control features which can prevent furnace operation These controls may require a RESET action to resume normal operation Ay caution FURNACE SAFETY CONTROLS THAT HAVE TRIPPED AND MUST BE MANUALLY RESET INDICATES A HIGH PROBABILITY OF A DANGEROUS PROBLEM IF THIS OCCURS IT IS MANDATORY THAT THE FURNACE BE INSPECTED BY A QUALIFIED SERVICE CONTRACTOR 1 IGNITIONCONTROL Reset by turning the system switch on the room thermostat to OFF and then back to
20. witch or knob clockwise until it stops at marking Push in slightly and turn clockwise to OFF 5 Replace control access panel Honeywell Valve White Rodgers Valve Gas Valve ES Honeywell On Off Selector E Q O Switch p v M OUTLET INLET z Figure 2 Gas Valve SEQUENCE OF OPERATION d w RNiNG LINE VOLTAGE NOW PRESENT When the unit is provided with the proper electric power supply and the proper gas supply the furnace will operate in the following sequence With the room thermostat set at the HEAT or AUTO position increasing the temperature setting or a drop in room temperature will signal the first stage of heat 1 The furnace ventor fan operates 2 The unit circulating air blower control begins timing and starts the blow in approximately twenty to thirty seconds NOTE Ifthe fan switch on the thermostat panel is set to the ON position the blower will operate continuously 3 Aftera 15 second pre purge period of ventor fan operation the ignition spark is initiated and the gas valve is opened to the low stage 4 The ignition spark ignites the burner d WARNING THIS FURNACE IS EQUIPPED WITH AN ELECTRIC IGNITION DO NOT ATTEMPT TO LIGHT THE FURNACE MANUALLY WITH A MATCH OR OTHER LIGHTING MEANS 5 he flame senso
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