USER`S INFORMATION MANUAL
Contents
1. GAS 4 GAS SHUT OFF PIPE VALVE PRESSURE T SWITCH BLOWER GAS VALVE HOT DIRT wi SURFACE LEG l s a IGNITOR WANNA icy see 81 ROLL OUT ME s BURNERS WITCH SMIS o EK ROLL OUT E SWITCHES PE BLOWER a A DOOR a E E ee SWITCH E a Y e FURNACE o Te e CONTROL N d S FIGURE 2 UPFLOW POSITION Description This furnace can be installed in the upflow downflow or horizontal po sition Figure 1 shows a typical model in the downflow position and figure 2 shows a typical model in the upflow position The furnace may also lie on either side in a horizontal position The fumace is equipped with an induced draft vent blower and atmospheric burners Combustion air is taken from the space or area in which the furnace is installed and drawn into the burners through the louvers in the front panel Flue gas is drawn from the furnace by the vent blower and discharged through the flue pipe to the outside atmosphere This is a forced air furnace The furnace circulating air blower draws cool air from the house passes it over the hot furnace heat ex changer and circulates the warmed air through the ductwork to the house The furnace is equipped with the controls necessary for proper op eration The various components referred to in this manual and on the furnace nameplate are identi fied in Figures 1 and 2 Sequence of Operation Thes2. Introduction Your furnace will give you all the comforts of complete winter air conditioning heating circula tion filtering you have control and yet the furnace is as auto matic as you desire it to be If you will observe the few oper ating and maintenance instruc tions in this booklet this high efficiency forced warm air fur nace will give you many years of dependable service A WARNING Failure to observe the fol lowing safety precautions could cause fire explosion or asphyxiation Safety Precautions For your safety Do not store or use flammable liquids vapors or materials in the immediate area near the furnace or other heating appliance Do not store brooms mops or equipment or materials near the furnace in any confined space which may be around or in front of the furnace AWARNING When the furnace is in stalled in an attic or other insulated space make sure that all insulation is at least 12 away from furnace combustion air openings Failure to do this could cause asphyxiation or fire AWARNING Adequate ventilation and combustion air must be provided to insure satis factory and safe operation of the furnace Air openings in front panel and top panel must not be obstructed Any openings into the fur nace closet or confined room in which the furnace is located for the entrance of combustion and ventila tion air must be kept open and unobstructed
3. Failure to observe these require ments could result in as phyxiation IMPORTANT NOTICE Do not use this furnace if any part has been under water Immedi ately call a qualified service technician to inspect the furnace and to replace any part of the control system and any gas control which has been under water AWARNING Should overheating occur or the gas supply fail to shut off shut off the man ual gas valve to the appli ance before shutting off the electrical supply AWARNING Do not store or use halo gen emitting substances in the vicinity of this appli ance Such substances in clude chlorine based cleaners and swimming pool chemicals water sof tening chemicals de icing salts and chemicals cleaning solvents such as carbon tetrachloride or per chloroethylene halogen type refrigerants printing inks paint and paint re movers varnishes hydro chloric acid cements and glues and masonry acid washing materials The air used by the burner for combustion must be free of halogens to avoid possible corrosion to the heating surfaces which could re sult in asphyxiation AWARNING Improper installations ad justment alteration service or maintenance can cause property damage personal injury or loss of life Instal lation and service must be performed by a qualified installer service agency or the gas supplier AWARNING Never attempt to m
4. valve opens the gas valve will close and the ig nitor will be turned off After a short pause the system will recycle and try again for ignition If the burners fail to light after three tries the ig nition system will lock out The system will remain in lockout mode until one hour has passed or until the room thermostat is cycled off then back on The fur nace will then try for ignition again The lapsed time from the moment the room thermo stat closes to when the burner light may be 30 40 seconds This delay is caused by 1 the time re quired for the vent blower to come to full speed 2 the time required for the ignitor to heat up and 3 the time required for fresh air to be brought into the heat ex changer 8 Thirty to forty seconds after the burners have lighted the fan switch will close and the furnace air circulation blower will run 9 When room thermostat is satisfied the circuit to the furnace control board is broken The circuit to the gas valve is broken and the burners are extinguished The vent blower will con tinue to run for a few sec onds The furnace control board will keep the circulat ing blower running for a fixed period of time to allow additional heat to be drawn from the heat exchanger Furnace Operation Safety Information For your safety read before op erating A WARNING If you do not follow these instructions exactly a fire or explosion may result causing proper
5. 650 66 O2V 998 035 15813 301 USER S INFORMATION MANUAL USE AND CARE INSTRUCTIONS FOR ALL POSITION AUTOMATIC IGNITION FURNACES SSeS eS 55 AWARNING If the information in this manual is not followed exactly a fire or explosion may result causing property damage personal injury or loss of life Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance 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 department Installation and service must be performed by a qualified installer service agency or the gas supplier APPROVED EFFICIENCY RATING CERTIFIED A WARNING If not installed operated and maintained in ac cordance with the manufacturer s instructions this product could expose you to substances in fuel or from fuel combustion which are known to the State of California to cause cancer birth defects or other reproductive harm Also opera tion installation and servicing of this product could expose you to airborne particles of glass wool fibers known to the State of California to cause cancer through inhalation
6. F ON O e OFF ON FIGURE 4 MANUAL GAS SHUTOFF VALVE Thermostat Set the room thermostat at the desired room temperature Greatest comfort will be achieved when the setting is not changed frequently For energy conservation and economy It is recommended that the thermostat be set at 68 for heating and 80 for cooling For Heating with Air Condi tioning Applications Set HEAT COOL switch to HEAT position and set FAN switch to AUTO position Energy Saver Thermostat An energy saver thermostat or set back thermostat will provide even greater fuel economy This type of thermostat may be set to control the temperature at a HIGH setting during the day time hours and a LOW setting during night time hours Follow the instructions supplied with the thermostat by the thermostat manufacturer If these are not available check with the in stalling dealer or contractor for proper setting and operation of your specific thermostat If Furnace Fails to Operate Properly 1 Check setting of thermostat and position of HEAT COOL switch if air conditioning is installed If a setback type thermostat is employed be sure that the thermostat is in the correct operating mode 2 Check to see that electrical power is ON 3 Check to see that the lever or switch on the gas control valve is in the full ON posi tion 4 Make sure filters are clean return grilles are not ob structed and supply regis ters are o
7. ance does not have a pilot It is equipped with an ig nition device which automati cally lights the burners Do not try to light the burners by hand 5 Remove front door panel 6 Move gas valve control lever or switch to OFF See Figure 3 ADJUSTMENT a p gt LO S GAS CONTROL MANIFOLD SWITCH PRESSURE FIRGURE 3 WHITE RODGERS GAS VALVE T 11 Wait five 5 minutes to clear out any gas Then smell for gas including near the floor If you smell gas STOP Follow 2 in the Safety Information If you don t smell gas go to the next step Move gas control lever or Switch to ON Replace front door panel Turn on all electric power to the furnace Set thermostat to desired set ting Gas Shutoff This furnace is equipped with a gas shutoff lever or switch on the gas valve which can be used to prevent gas from flow ing to the furnace Figure 3 shows the location of the shutoff lever or switch To turn off gas to the furnace move the lever or Switch to the OFF position The furnace installation should also have a manual shutoff valve in the gas piping to the furnace similar to what is shown in Figure 4 To turn off the gas to the furnace use a wrench and turn the knob or lever so that it is pointing 90 degrees from the gas pipe as shown in Figure 4 O O OF
8. ated in one of these places or if the method of re moval and replacement is not obvious then contact the in stalling contractor of the furnace for assistance SIDE RETURN FILTER BOTTOM RETURN FILTER FIGURE 5 DOWNFLOW FILTERS FIGURE 6 UPFLOW FILTERS Periodic Inspection and Maintenance It is recommended that the homeowner or user make an inspection of the furnace at least every 90 days or more often if desired It is also recommended that a qualified service agency inspect the furnace before each operating season the furnace is used both heating and air condi tioning and at any time that there is an indication of malfunc tion The owner user should not attempt to disassemble the fur nace unless experienced and qualified to do so A CAUTION FOR SAFETY Turn off electrical power to furnace before performing any service The furnace installation should be examined to determine that 1 All flue product carrying areas external to the furnace chimney vent connector etc are clear and free of obstructions 2 The vent connector is in place slopes upward and is physically sound without holes or excessive corrosion 3 The return air connection is physically sound is sealed to the furnace casing and ter minates outside the space containing the furnace 4 The physical support of the furnace is sound without sagging and the furnace is level and 5 There are no obvi
9. e furnaces are equipped with an electric hot surface burner igni tion system In response to a call for heat by the room thermostat the burners are lighted by a hot glowing ignitor at the beginning of each operation cycle The burners will continue to operate until the thermostat is satisfied at which time all burner flame is extinguished During the off cycle no gas is con sumed With the room thermostat set below room temperature and with the electrical power and gas supply to the furnace on the nor mal sequence of operation is as follows 1 When the room temperature falls below the setting of the room thermostat the thermo stat energizes the furnace con trol board When the furnace control board is activated the vent blower is turned on A circuit is also made through the normally open pressure Switch contacts As the vent blower in creases in speed the con tacts of the pressure switch will close and complete the electrical circuit to the igni tor During the next 15 30 sec onds the vent blower will bring fresh air into the heat exchanger and the ignitor will begin to glow At the end of this period the gas valve will open and the burners will light After the burners light a separate sensor acts as a flame probe to check for the presence of flame As long as flame is present the system will monitor it and hold the gas valve open If the burners fail to light within 6 8 seconds after the gas
10. e of this type will allow you to operate the unit with a minimum of con cern and at the same time will pay for itself in added years of comfort When You Call For Service Assistance Very often time can be saved if you will give the service com pany the MODEL and SERIAL NUMBER of your furnace This will enable the company to de termine the specific components used and perhaps to better identify the possible problem and be better prepared if a service call is required To Contact Your Service Technician For immediate reference fill in the following blanks and keep this booklet in a safe and easily accessible place COMPANY ADDRESS TELEPHONE Trips and Vacations The furnace is equipped with controls which are designed to shut off the furnace burners should malfunction occur How ever it is best never to assume that the furnace will operate un attended for long periods of time especially if there is a pos sibility of damage to your prop erty because of freezing If you plan to be away for an extended period it is suggested that ar rangements be made for some one to check the house and fur nace operation frequently Subject to change without notice Printed in U S A Copyright by Unitary Product Group 1998 All rights reserved 035 15813 301 998 Unitary 5005 Norman Products York OK Group Drive 73069
11. odify this furnace Fire explo sion or asphyxiation may result If malfunction oc curs obtain the assistance of a qualified service agent MeL VENT FURNACE ry CONTROL Cc s VENT PIPE d Ib 1 TRANSITION e man BLOWER CAS DOOR J PIPE SWITCH ESI i onda 3 DIAMETER zm it VENT PIPE ROLL OUT N GAS SWITCHES O Op SHUT OFF BURNERS p Pepea ROLL OUT EE Slk A Se TT SWITCH VH IGNITOR xr ere eet LEG GAS FRI lo VALVE 5 P GG VENT e PRESSURE zu LP Y BLOWER SWITCH A FIGURE 1 DOWNFLOW POSITION
12. ous signs of deterioration of the fur nace Flue Piping Inspect the flue piping connec tion at the furnace and the con nection of the individual sections to ensure that pipe joints have not become disengaged and that there are no openings which could allow leakage of products of combustion Inspect the termi nation of the flue outside the structure and look for any indi cation of carbon or soot streaks The presence of any soot would indicate a malfunction and the cause must be determined and corrected Motor Lubrication The circulating air blower motor and vent blower are perma nently lubricated and do not re quire periodic lubrication IMPORTANT This equipment must be serviced only by qualified individuals specially trained and experienced in servic ing of this type equipment and related system com ponents such as duct systems air conditioning etc Installation and service personnel are required to be licensed in some areas Persons not qualified should not attempt to serv ice this equipment Your Service Technician Your furnace s best friend is your qualified service techni cian If the unit gives any indica tion of improper operation call your service technician If the service technician is allowed to perform the normal routine care of your furnace he she can many times detect potential dif ficulties and make corrections before trouble develops Pre ventative maintenanc
13. pen 5 Be sure that furnace flue piping is open and unob structed 6 This furnace is equipped with a BLOWER DOOR SAFETY SWITCH It is lo cated behind the blower door See Figures 1 or 2 The switch controls the electrical power to the fur nace and prevents the fur nace from operating if the blower door is not in place or is improperly installed 7 This furnace is equipped with three rollout switches which are designed to shut down the furnace in the event that excessive rollout occurs These switches are located near the burners as shown in Figures 1 or 2 If any of these switches shuts down the furnace do not attempt to restart it Call a service technician to correct the problem IMPORTANT If the cause for the failure to operate is not obvious do not attempt to service the furnace yourself Call a qualified serv ice agency or your gas sup plier Filters It is very important that filters in your furnace or air conditioning system be cleaned frequently or replaced when necessary Clean filters not only provide added com fort and a more healthful environ ment but also allow the system to operate more efficiently Check filters every two or three weeks Your furnace may be equipped with a permanent type filter which need not be replaced provided it is cleaned frequently A permanent filter may be washed in a mild solu tion of detergent and water and then rinsed thoroughly with clear wa
14. ter If the pores of the filter me dia become clogged with dirt or lint FILTER RACK which cannot be washed out or if the filter becomes damaged it must be replaced A replace ment filter should be of the same type and the same size as the old filter Filter Replacement Downflow In your installation the filter may be located in the return air duct above the furnace as shown in Figure 5 or it may be located behind a return air grille If the filter is located in the re turn air duct above the furnace replace the filters as shown in Figure 5 with the bottom of the filter resting in the filter rack and the top edges of the filters leaning against the inside of the duct If the filter is not located in the return air duct above the furnace or if the method of re moval and replacement is not obvious then contact the in stalling contractor of the furnace for assistance Filter Replacement Horizontal The filter may be located in a filter rack near the furnace or it may be located behind a return air grille If you cannot find the filter or if the method of removal and replacement is not obvious then contact the installing con tractor of the furnace for assis tance Filter Replacement Upflow The filter may be located in a filter rack attached to the side of the furnace or it may be located in a filter rack beneath the fur nace See Figure 6 If the filter is not loc
15. ty damage personal injury or loss of life 1 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 2 Before operating 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 on the floor What to do if you smell gas e Do not try to light any appliance e Do not touch any electrical Switch do not use any phone in your building e Immediately call your gas supplier from a neighbors phone Follow the gas supplier s instructions e f you cannot reach your gas supplier call the fire department Use only your hand to turn the gas control lever or switch Never use tools If the lever or Switch will not move by hand don t try to repair it call a qualified service technician Force or attempted repair may result in a fire or explosion Do not use this appliance if any part has been under water Immediately call a qualified service technician to inspect the appliance and to replace any part of the control system and any gas control which has been under water Operating Instructions 1 STOP Read the safety infor mation listed above 2 Set the thermostat to the low est setting or OFF 3 Turn off all electric power to the furnace 4 This appli
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