Desa F110D Construction Heaters Owner's Manual 25 Pages
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| PORTABLE HEATERS — MODEL FI10D Spec. No. 3196 G02 — OPERATING, MAINTENANCE | and SERVICE INSTRUCTIONS with PARTS LIST Koehring ¿| Master Division Form No. 2947 (5/73) Litho in U.S. A. SAFETY RULES SAFETY RULES FOR PORTABLE HEATERS 1. Know Your Portable Heater Read and understand the complete owners manual before starting the heater. 2. Heater Location Do not use the heater in the presence of flam- mable vapors, or within five feet of combustible materials. Gasoline vapors are heavier than air and will accumulate in low areas. The heater must not be used in garages unless the door is kept open and it leads to an adjacent ground or driveway level that is at or below the level of the garage floor. 3. Sleeping Quarters Do not usc the heater in sleeping quarters. 4. Provide Ventilation Tousc thc heater ina confined space, provide onc square foot of ventilating areca per cach 100,000 BTU rating. 3 5. Use Only Recommended Fuel Use ONLY keroserc or No. 1 fuel oil. DO NOT USE GASOLINE. 6. Refueling Do not add [uel while the heater is operating. 7. Disconnect Heater Before scrvicing, cleaning, moving, etc. 8. Keep Unit Grounded Use the three prong plug provided. If an adapter isused, attach the adapter wire toa known ground. Never remove the third prong. Use only three- conductor extension cords. 9. Keep a Fire Extinguisher Accessible... It is recommended that a Dry Chemical type fire extinguisher be available when the heater is used. TUNE UP To keep your heater in top operating condition, perform the following scrvices at the start of each heater season then at the interval specified below: Clean and flush fuel tank.. .. .......... Clean and/or replace fuel filter ........ Cleanatleasttwice a season. After every 150 hours operation. More often if heater performance indicates the need. Replace if necessary. + a & а а a = = = = Clean or replace air filters Clean fan в + ее + |. в я = я а. я о в ое ое о |. |. & & = = a Clean burner nozzle. * т оков от яв + v 4 * = a = a Clean and adjust spark plug но ео =: A = =: =» Clean photo cell. . .....4444 4404000 6 A3229-01 Check air filter frequently. If a film of dust is apparent on the filter, remove and clean it. Replace after each 200 hours of heater operation. Clean fan after every 500 hours of operation. Clean more fre- quently if heateris operating in dusty areas or if there is a build- up of dirt on the blades. | Cleanthe nozzle at least once during the heater season or more often if heater performance indicates the need. After every 300 hours of operation, clean and adjust spark plug electrodes. Adjust gap or replacc the plug if electrodes have been burned or erroded. Clean the photo cell face with a soft cloth at least once during the heater season. If cell face tends to soot up, check with your nearest service station to determine the cause. —j- 5/73 SECTION | INTRODUCTION A. GENERAL 1. Purpose of Manual. This Manual gives in- structions for operating, maintaining, trouble shooting and servicing the heaters. A complete parts list is included at the end of the manual. 2. Purpose of Heater. Use this heater wherever you need temporary portable heat. If must be used with adequate ventilation and proper electrical power. B. THEORY OF OPERATION There are four basic systems within the heater: the fuel system, the air system, the ignition system, and the safety control system. (Refer to figure 1 for a schematic which depicts the operation.) An air pump on one end of the motor shaft forces air through the air tube and out the burner nozzle. The moving air creates a pressure differential in the burn- er head causing fuel to be drawn from the tank. The fuel and air mix and the mixture is sprayed into the combustion chamber in a fine mist. Additional air is supplied to the combustion cham- ber by a fan on the opposite end of the motor shaft. Ports around the burner headallow a portion of the air being moved by the fan to enter the combustion cham- ber where it mixes with the air and fuel entering the combustion chamber from the nozzle. The remaining air is directed around and over the combustion cham- ber. This air mixes with the heated air from the combustion chamber and is ejected as a jet of clean, heated air. The ignition system consists of a transformer and spark plug. The transformer increases the input volt- age to a very high potential which causes an arc to be drawn between the electrodes of the spark plug. The arc is used to ignite the fuel and air mixture within the combustion chamber. The arc fires constantly during operation. A ET COMBUSTION CHAMBER SPARK AIR PUMP MBU / | FILTER CE és \ — > À \ pu Lean SE ; HEATED = Cars AIR OUT > oo COOL AIR IN A \ OUTPUT AIR analy : 7] NOZZLE \ ia D AIR FOR FUEL SYSTEM FILTER IGNITION TRANSFORMER AIR LINE | AIR FOR COMBUSTION AND HEATING | TO BURNER 4” < FUEL 466 Figure 1. A3560-00 _1- Schematic Diagram Showing Principles of Heater Operation 5/73 The safety control circuit essentially consists of three parts: a light-sensitive cell (flame sensor), a silicon-controlled rectifier (SRC), and the circuit breaker. The circuit breaker automatically trips if the flame fails, thereby causing the heater to shut down. (See figure 2.) The flame sensor is used to sense the presence of light due to the flame inside the combustion cham- ber. It varies its electrical resistance in relation to light rays. When under the influence of light, the cell has very low resistance. The resistance is high when little or no light strikes the light-sensitive surface. The flame sensor's function is to control the trigger voltage of a silicon-controlled rectifier. The SCR acts as a voltage-operated switch. When the trigger voltage reaches a certain level, the SCR will conduct and allow a current to flow through the heating coil of the circuit breaker. When the voltage drops, such as when the flame sensor senses light and decreases its resistance, the SCR will turn off and block the flow of current. The circuit breaker is a thermally operated switch. Current flowing through the heating coil will cause it to heat. When a specific temperature of a bi-metal element is reached, the contacts of the breaker will open to interrupt the current flow to the motor and transformer. This action takes approximately 15 seconds at 70 degrees F. The breaker must be man- ually reset by pressing the red circuit breaker reset button. The flow of current through the heating coil is controlled by the action of the SCR. If ignition takes place before the breaker trips, the flow of current through the coil is virtually stopped, the heating action stops and the contacts remain closed, thus allowing current to continue to flow to the motor and trans- former. The SCR and its circuit are mounted on top of the circuit breaker and is replaceable only as an assem- bly. Athermostat accessory (Model No. HA-1200) may be incorporated into the electrical circuit. The ac- cessory canbe setto any desired temperature between 30 degrees F. and 90 degrees F. When the temperature of the surrounding air reaches the present tempera- A3514-00 ture, the thermostat contacts open to shut down the heater. Whentheair cools, the contacts close and the heater recycles. To shut down the heater when using the thermostat accessory, place the dial in the "NO HEAT" position. C. POWER REQUIREMENTS The heaters are manufacturedfor use on 115 volt, 60 cycle power. D., SPECIFICATIONS Output Rating (BTU per hour) 90, 000 Amperage (During normal run) 4.0 Air Pump Pressure (PSI) 4+ 1/4 Weight (Approx.) (Lbs.) Shipping 79 Dry (net) 62 Fuel Tank Capacity, U.S. Gallons Styled configuration 9. 0 Fuel Consumption, Approx. U.S. Gallons per hour 0.66 Electrical Requirements Voltage 115 Cycles 60 Motor RPM 3450 Fuel Kerosene or No, 1 Fuel Oil only Duct No Duct Recommended E. ACCESSORIES A thermostat control kit, Part No. HA1200 is available as an accessory for use with these heaters. The thermostat can be set for any temperature be- tween 30 and 90 TF, and will cycle the heater on and off to maintain the surrounding air at the desired tem- perature. At its NO HEAT position, the thermostat shuts the heater off. SECTION II OPERATION A. OPERATING CAUTIONS 1. Use the heater in a well-ventilated area only. À partly-opened door or window near the heater will give enough ventilation. We do not recommend the use of this heater as a source of heat in sleeping quarters, 2. Use ONLY kerosene or No. 1 fuel oil. DO NOT USE GASOLINE, AS IT IS VOLATILE AND DANGEROUS. Do not use No. 2 or No. 3 fuel oil, as they contain tars which will contaminate the heater. 3. Usetheheater only on the specified electrical power. This is given on the heater instruction plate. 4, Plugthe heater into a grounded receptacle, or use a grounding adapter. Be surethe heater is ground- ed whenever it is in operation and whenever you are working on it. 5. Keeptheheater at least 5 feet from any com- bustible material. 6. Donotuse the heater in the presence of flam- mable vapors like those from paint or gasoline. 7. Do not add fuel while the heater is operating. 8. Check spark plug gap after each 300 hours of operation. Make checking the spark plug gap a part of your periodic heater maintenance program. B. EXTENSION CORD WIRE SIZES Be sure to use an extension cord of the proper size to assure adequate voltage at the heater. Length of cord (feet) 100 200 300 400 500 Wire size (AWG) 14 12 10 8 6 C. FUEL Be sure the tank is clean. Fill it with clean ker- osene or No. 1 fuel oil ONLY. Do not use any other fuel. When the heater is operated at very low temper- atures (beyond 10 F below zero), the fuel may con- geal. To prevent this, add a non-toxic anti-icer to the fuel. Follow the mixing instructions contained on the anti-icer container. D. STARTING 1. Power Supply. Be sure that the power avail- able to the heater matches that shown on the instruc- tion plate, in both voltage and frequency (cycles). 2. Heaters Without Thermostat Accessory. The heater will normally ignite as soon as it is plugged into the outlet. A3515-00 3. Heaters With Thermostat Accessory. Set the temperature dial of the thermostat accessory to the desired temperature. a. If the dial is set to a temperature set- ting, the heater should ignite immediately, providing the surrounding air is cooler than the setting of the dial. The heater will operate until the temperature of the air reaches the dial setting, then will shut off. When the surrounding air temperature falls below the dial setting, the heater will start. b. If the heater does not ignite, press the red reset button on the rear of the heater. The heater should start immediately. с. Н the heater fails to start, the red but- ton will pop out within 15 to 45 seconds, depending on surrounding temperature. If it pops out, wait from three to five minutes for the control circuit br eaker tocool, then press the red button again, after check- ing for the reason the heater did not start. d. The heaters will generally restart after they are shut off, without pressing the red reset button. E, STOPPING To stop the heater, unplug the heater cord from the outlet. (If the heater has a thermostat accessory, set the dial to "NO HEAT" position. 5/73 SECTION MAINTENANCE Maintenance consists of the simple operations the owner or user of the heater can perform to keep the heater running and in good condition. If ordinary main- tenance fails to return the heater to good operating condition, refer to Section IV in this manual for check- ing andtrouble shooting. See Figure 2 for component identification. A, FUEL TANK MAINTENANCE Drain the fuel tank after every 150 hours of oper- ation, and flush itoutwith cleanfuel. Refill with fresh clean fuel. B. AIR FILTERS 1. Check and clean the intake air filter often. The filter needs cleaning if you can see a film of dust onit. It will need cleaning more often if the heater is operated in dusty air. See Figure 3. 2. To clean the intake air filter, simply pull it out of the housing. Wash it with a mild detergent and hot or cold water. Dry it thoroughly, and replace it in the housing. НО CAUTION: DO NOT OIL the filter element. 3. Replace the outputair filter once each heating season. 4. Toreachthe outputair filter, remove the four screws which attach the filter housing end cover. Re- move the output air filter. See Figure 4. NOTE: Cleaning the output air filter may cause a change inthe air pump output pressure. If the heater burns improperly after cleaning, have the air pump pressure checked. See Section V, paragraph L. COMBUSTION CHAMBER FUEL FILTER (X) SAFETY CONTROL - BURNER () SPARK PLUG (X) PHOTO CELL SAFETY CONTROL RESET BUTTON MOTOR INTAKE AIR FILTER (%) I) output AIR FILTER ZZ (INSIDE HOUSING) > (>) NI LINT FILTER (INSIDE HOUSING) (%) TRANSFORMER Figure 2. Heater Component Identification Symbol (*) indicates parts recommended as replaceable by owner or user of heater. (For clarity, heater is shown without tank, wheels and handles, and with upper shell removed) A3563-00 5/73 416 Figure 3. Removing Intake Air Filter 5. Whenchanging the output air filter, clean the lintfilter. Pick it out of the housing, wash with mild detergent and hot or cold water. Dry thoroughly. Do not oil. 6. Replace the lint filter, the output air filter, the filter housing end cover, and the screws and washers. C. REMOVING UPPER SHELL WARNING With the upper shell removed and the service cord plugged in, the heater canbe dangerous. Always unplug the heater when performing the following maintenance operations. Remove the upper shell by removing the eight screws {4 on each side) that hold the upper shell to the lower shell. Lift the upper shell off. To replace the upper shell, align the eight holes located along its lower edge over the eight speed nuts on the lower shell, and install the screws. D. CLEANING THE FAN Cleanthe fan blades after every 500 hours of op- eration, or whenever you see that they are getting dirty. Abuild-up of dirtwill reduce the air supply and cause faulty operation. To clean, wipe the blades with a cloth moistened with kerosene or solvent. Be careful not to bend the blades. Dry the fan thoroughly. E. MOTOR LUBRICATION The ball bearing on the pump-end of the motor is lubricated for the life of the motor. Do not lubricate it. : A2303-03 LINT FILTER OUTPUT. [AIR FILTER AIR INTAKE FILTER N N ALTER ON HOUSING END COVER 417 H Figure 4. Access to Air Filter f£or Maintenance Oil the sleeve bearing on the fan-end of the motor (See figure 5) once each year with 10 to 20 drops of Mobil DTE-LC or DTE-23 oil. F. SPARK PLUG WARNING Be sure the heater is not plugged into the outlet. The spark plug wire carries high voltage during heater operation. 1. Disconnect the spark plug wire. 2. Removethe spark plug from the burner head, and check the gap between the electrodes. The gap must be within the limits shown in Figure 6. OIL FAN-END MOTOR BEARING HERE 419 Figure 5. Lubrication of Motor Bearing 10/71 BEND HERE TO ADJUST GAP / == | .050 nel Figure 6. Spark Plug Gap Setting 3. Adjustthe gap by bending the outside electrode where showninfigure 6, If you do not install the plug immediately, protect it from damage until it is re- installed. | 4. Install the plug into the burner head, if no further burner head maintenance is required. Make sure the spark plug is seatedfirmly in the burner head. G. CLEANING THE FUEL FILTER The fuel filter is in the tube which leads up from the fuel tank to the burner. Clean it twice each sea- son, or if the Trouble Shooting Chart indicates. 1. To remove the fuel filter, loosen the hex nut attaching the filter tube to the burner head. 2. Slide the tube down into the tank so that the tube will clear the male connector in the nozzle adapt- er. Push the tube to one side. Withdraw the filter element and tube from the fuel tank. Withdraw the filter element out of the tube. Rinse it several times in clean fuel. 3. Blow the element dry, with a gentle stream of compressed air, through the large end. Use care to prevent damaging the filter element with air pres- sure. 4. IK the filter element is damaged or lost, it must be replaced with a new element. NEVER oper- ate the heater without the element in place. Failure to use the filter clement may result in clogging and per- manent damage to the nozzle. 5. Insert the fuel filter element into the tube mak- ing sure that it seats properly in the tube. Install the A2818-03 COMBUSTION CHAMBER BURNER A FUEL FILTER Figure 7. Burner Head, Spark Plug, and Fuel Filter flared nut onto the tube. Insert the filter element and tube into the fuel tank. Position the filter tube carefully to seat on the male connector and thread the flare nut to secure the filter and tube. If the burner head is to be removed for maintenance, do not reinstall the fuel filter until ready to reinstall the burner. NOTE: H. BURNER REMOVAL, CLEANING AND REPLACEMENT 1. Besuretheheater cord is unplugged, and re- move the leadwire from the spark plug. Remove fuel filter from burner head. Disconnect the air line from the fitting in the right side of the nozzle adapter. 2. Removethe screws thatfasten the burner head tothe rear of the combustion chamber and remove the burner head. 3. Remove the nozzle carefully, using a socket wrench. Hold the nozzle adapter with another wrench while removing the nozzle. CAUTION Do not attempt to open the nozzle passage with a steel drill, a wire or any other tool, as you will damage it beyond repair. Protect the nozzle face from damage while the burner is out of the heater. This is important! 4. Soak the remaining parts of the burner head assembly for one hour in non-flammable liquid clean- ing agent. (DO NOT use kerosene or fuel oil). Blow dry through the face (OUTLET) end ONLY. See Fig- ure 8. 5/73 5. Re-check the spark plug electrode setting after cleaning the burner. Sez Paragraph F of this Section. 6. When reinstalling the burner, place it on the back of the combustion chamber so the fitting for the fuel filter is down, and the spark plug hole is just above center, onthe right. Install the attaching screws and tighten. 7. Connectthefuel filter and the air line to their respective fittings on the nozzle adapter. 8. Install the spark plug (refer to paragraph F, step 4), and snap the spark plug lead onto the termi- nal. It must snap, or it may not be tight enough to prevent loosening as the heater is moved. I. SAFETY CONTROL SYSTEM For servicing the safety control system, refer to Section V. J. REASSEMBLY AFTER MAINTENANCE Put the heater back together in the reverse order ~ of disassembly. Be sure all parts are in place and all screws and electrical connections are tight before attempting to use the heater. A3517-00 RUBBER SLEEVE / SEAL WASHER / | SPRING SEAL WASHER gg E NOZZLE FACE NOZZLE PASSAGE AIR HOSE Figure 8. Blowing Out Nozzle With Compressed Air 5/73 SECTION IV TROUBLE SHOOTING A. GENERAL WARNING Always unplug the heater whenever you are servicing it. Use extreme care when per- forming those service operations which re- quire the heater to be plugged into a power source. If normal maintenance fails to keep a heater in good operating condition, it probably requires repair or replacement of some parts. Examine it and test- fire itto gain first-hand knowledge of why the service might be needed. This section tells how to examine and test-fire the heater. It also contains a Trouble Shooting Chart for help in diagnosing heater troubles and finding the re- medies. B. EXAMINATION 1. Check the fuel tank for sludge and water. If you find it, expect to find a dirty nozzle and/or fuel filter. 2. Spinthefanto be sure it turns freely. If it is stiff, look for worn or dry bearing on the fan-end of the motor, or for a binding pump rotor. 3. Check the heater for dirt and foreign mater- ials around the pump, fan, and air filters. Be sure the heater is reasonably clean before test-firing it. 4, Check the heater cord for obvious breaks or other unsafe conditions. If the cord is doubtful, re- pair it or install a new one before test-firing. C. TEST-FIRING 1. Clean the fuel tank and fill it with at least 3 A0387-05 gallons of fuel. A minimum of 3/4 gallon of fuel must be in the tank for proper test-firing. 2. Clean the air intake filter. (See Section III). 3. Checkandadjustthe air pressure, as describ- ed in Section V, paragraph L. NOTE: It is not possible to test-fire a heater properly if this adjustment cannot be made. 4. Allow the heater to run for 15 minutes. Ob- serve its operation during the test-run. 5. After making the pressure check, adjustment, and test-firing, remove the gage and reinstall the plug. CAUTION Tighten plug until sealed. Use soapy water to check for sealing. Do not overtighten. 6. If troubles showup during the test-firing, re- fer to the Trouble Shooting Chart for remedy. D. TROUBLE SHOOTING The following chart lists problems, "Possible Causes'" and "Remedy", to correct the problem or tells you a section and paragraph number where to find detailed instructions for correcting it. In trouble shooting, remember that the air pump is part of the fuel system, because the air it supplies lifts the fuel from the tank and pushes it through the nozzle. NOTE: Besure to follow all cautions and warn- ings. They will help you prevent damage to the heater or injury to yourself. 5/73 TROUBLE SHOOTING CHART 4 FOR FURTHER PROBLEM POSSIBLE CAUSE REMEDY DETAILS SEE: 1. Motor does not Electrical Troubles start; thermostat (if used) is set to call for heat. a. No power or low Be sure power is reaching heater; voltage at heater. check condition of heater cord. Repair or replace as needed. Use extension cord with wires Sec. II, heavy enough to carry the elec- Para. B. trical load of the heater. Be sure voltage at outlet is same as shown on heater instruction plate. b. Damaged motor, Check motor. Sec. V, motor starting Para. F. relay, binding fan- Replace a defective motor (or motor end bearing; bind- starting relay). ing pump. Lubricate motor (Fan-end only). Sec. III, Para. E. Rebuild motor. Motor Mfr's. Instructions. Rebuild or replace a binding pump. Sec. V, Para. K. с. Thermostat (if Replace used) damaged. Mechanical Troubles d. Dry bearing on Lubricate motor. Sec. II, Para. E. fan-end of motor. If lubrication does not solve Sec. V, Para. K. problem, check pump. e. Pump rotor binding Rebuild pump. Sec. V, Para. K. or carbon blades worn out. f. Fan obstructed by Check for bent outer shell. Sec. V, mechanical damage Para. H. or dirt. Check for damaged fan; replace if defective. Check for damaged motor mount. 2. Heater will not Fuel System Troubles ignite, but motor runs for a short a. Fuel tank empty, Check for water in tank; clean time. water in fuel, tank and fuel filter if water is wrong fuel. found. (Water in the tank will form globules in the bottom, which you can see.) Fill tank with fresh, clean kerosene or No. 1 fuel oil. A3518-00 -9- 5/73 TROUBLE SHOOTING CHART (Continued) PROBLEM POSSIBLE CAUSE REMEDY FOR FURTHER DETAILS SEE: 2, (Continued) b. Fuel filter clogged. Remove and wash in clean fuel. Sec. HI, Heater will not Blow dry and replace. Para. G. ignite, but motor mess — runs for a short с. Nozzle plugged or Clean by blowing compressed air Sec. III, time. defective. through nozzle from outlet end Para. H. of nozzle. Replace nozzle if cleaning does Sec. V, not solve the problem, Para. J. d. Low air pump Check pressure; adjust, rebuild, Sec. V, pressure, or replace air pump as needed. Para. K & L. Check rubber sleeve around shank of nozzle; replace if leaking. Check to be sure all air line con- nections from pump to burner are secure. Check to be sure air filter end cover is securely fastened, without air leaks. Be sure air filters are clean. Sec, III, Para. B. e. Air leak at fuel Check fuel filter for air leaks and filter. for tightness of fitting where filter is connected to burner head. Ignition Troubles e. Defective spark Measure gap between electrodes, Sec. III, Para. F. plug. (Wrong gap, using thickness of a dime as a plug wet with fuel gage. Adjust electrode gap. or electrodes car- boned, or plug Inspect plug for worn or erroded damaged.) electrodes. Replace a damaged spark plug. f. Spark plug wire Disconnect heater cord! disconnected from plug or from termi-| Check at plug and transformer to nal of transformer. be sure wire is tight at both ends. g. Defective Disconnect spark plug wire from Sec. V, Para. E. transformer, transformer, and check trans- former for spark; replace if no spark can be obtained. A3519-00 -10- 5/73 TROUBLE SHOOTING CHART (Continued) PROBLEM POSSIBLE CAUSE REMEDY FOR FURTHER DETAILS SEE: 3. Heater burns, but puffs of Improper Fuel-Air Mixture (Not enough fuel) smoke can be a. Heater running out Shut heater off; check fuel tank, If seen; heater of fuel; water con- you can see globules of water in the Will not burn densation in fuel bottom, drain and flush the tank steady; heater tank; wrong fuel. and filter with clean fuel. burns with odor; heater Refill with fresh, clean kerosene smokes or No. 1 fuel oil. continuously. b. Dirty air filters Remove and clean the air filters. Sec. II, Para. В. causing reduced air flow through Be sure air intake is not blocked. nozzle, resulting | in low fuel flow. с. Fuel filter loose, Remove and wash fuel filter in Sec. III, Para. С. dirty or con- clean fuel. nection loose. Check condition of connection Sec. V, Para. I. between fuel filter and burner head. Replace with new filter tube, nut, or fitting if connection can't be tightened without leaks. d. Dirty nozzle. Remove and clean the burner Sec. III, Para. H. head. Blow compressed air through nozzle from outlet end. Never use a drill, wire, or other tool to open a nozzle passage. Replace a defective nozzle. Sec. V, Para. J. e. Low pump output Check and adjust pump output Sec. V, pressure. (Low pressure; repair or replace Paras. K & L. motor speed, pump if adjustment cannot be worn pump, pump made. out of adjustment.) Check to be sure that no dirt or trash (or dirty fan blades) could be causing motor slowdown. Lubricate fan~end bearing of motor. Sec. III, Para. E. f. Loose air output line| Be sure connections are tight. connections between filter housing and burner. A2821-01 -11- 5/73 TROUBLE SHOOTING CHART (Continued) PROBLEM POSSIBLE CAUSE REMEDY FOR FURTHER DETAILS SEE: 3. (Continued) g. (Remote possibility) If heater puffs intermittently, Sec. V, Para. J. Heater burns, Rubber sleeve on shank replace the rubber sleeve. but puffs of of nozzle is leaking. (Handle parts carefully to smoke can be prevent damage, assemble seen; heater them carefully to preserve will not burn airtightness.) steady; heater — burns with h. (Remote possibility) Tighten screws. If parts are ‘ odor; heater Combustion chamber warped from heat, replace | smokes not tight against warped parts. There must be continuously. burner head, allowing no air gap between face of too much air to enter burner head and back of combustion chamber. combustion chamber. 4, Flames come out Improper Fuel-Air Mixture (Too much fuel, or not enough air for front of heater. amount of fuel being supplied.) a. Dirty fan, or air pas- Clean the fan. Be sure the air sageway through heater passageway through the heater is blocked by dirt or clean. Keep the heater clean. trash. b. Pump output pressure Check and adjust pump output Sec. V, Para. L. is too high, causing too pressure. much fuel to be supplied. с. Fan loose or improperly | Check fan; correct if not right. Sec. V, Para. H. located on shaft, а. Bent or damaged fan. Replace. Do not attempt repair of fan, o. Heater cycles Electrical System Troubles intermittently. | a. Thermostat set Set thermostat to a higher too low. temperature for more even operation. b. Defective thermostat Replace a defective thermo- Sec. V, Para. C. stat. c. Low voltage causing Check power line voltage. tripout of motor overload protector. Use extension cord with proper size wire. Sec. II, Para. B. d. Defective electrical Be sure extension cord and supply or defective heater service cord are in connections, good condition, without intermittent open circuits. Check mechanical and electrical soundness of all wiring connections in the heater and service cord. A3520-00 -12- 5/73 TROUBLE SHOOTING CHART (Continued) PROBLEM POSSIBLE CAUSE FOR FURTHER DETAILS SEE: REMEDY Control System Troubles Heater ignites, but red button of safety control circuit breaker pops out anyway. Defective photo cell. Sec. V, Para. N. Check to see if glass face of cell is so dirty it can't "see" the flame; clean glass if dirty. Replace with a cell that is known to be good. Defective safety control. Replace with a control that is known to be good. Defective electrical connections in circuit through cell and control relay. Be sure all solder joints and wiring connections are secure. Check wiring diagram. Safety Control cir- cuit breaker fails Defective circuit breaker. Replace with a circuit breaker that is known to be good. to trip when a no-flame condition exists. Contacts dirty or defective. Replace defective contacts with one that is known to be good. Photocell electrical leads shorted. Check photocell leads for shorted leads. Replace photocell if damaged. Button on safety control circuit breaker won't stay Resetting is tried too soon after the breaker trips. Wait 5 minutes and try again. in when pressed. b. Defective circuit Replace with a circuit breaker that is known breaker. to be good. Photo cell circuit open. Check photocell for open condition. Replace if damaged. PHOTO MOTOR CELL WIRE NUT WHITE 7` RED BLUE INTERNAL MOTOR GROUND RELAY 11 BLACK WIRE CIRCUIT 1] 5 UK BREAKER TRANSFORMER LABEL y He WHITE | RED т BLUE | BLACK AA RED ra H WIRE WHITE NUT — GREEN J, BLACK A3521-00 Figure 9. Wiring Diagram —13- 5/73 SECTION V SERVICE AND REPAIR A. GENERAL This section covers replacement of parts, repair and rebuilding of heater components, and the making of adjustments. Check to be sure the maintenance of the heater has been done, before going into the more extensive service operations. enever a part needs to be replaced, you can identify it on the exploded view in the Parts List por- tion of this book, Section VI. Order any needed part by name and part number. B. SPECIAL TOOLS, EQUIPMENT, AND SUPPLIES The following tools, equipment and supplies should be available for complete servicing of the heater. 1. .Air Gage, Part No. M9148, or any gage with a 15 pound pressure range and 1/4 pound divisions, able to indicate 4-1/4 pounds accurately, plus fittings for installation into a 1/8-inch standard pipe-threaded hole. 2. Oil Burner Nozzle Wrench, or any 5/8-inch socket wrench. 3. Cleanfuel, either kerosene or No. 1 fuel oil. 4. Non-flammable, non-toxic liquid cleaning sol~ vent. | CAUTION Fumes given off by solvents may be toxic, therefore use solvents in a well ventilated area. 5. Compressed air is advisable, but not ab- solutely necessary. C. THERMOSTAT ACCESSORY 1. Turn the knob slowly, through the full range of the thermostat, two or three times. If the heater does not start, proceed as follows: 2. Take the thermostat accessory out of the cir- cuit by unplugging the heater from the thermostat ac- cessory. A3580-00 -14~ 3. Plug the heater service cord into an outlet. If the heater operates properly, the thermostat is defective and must be replaced. D. REMOVAL OF UPPER SHELL It will be necessary to remove the upper shell in order to perform the following service operations on the heater. See Section III, paragraph C. E. TRANSFORMER WARNING To begin the transformer test, first be sure the heater is not plugged in. Then, when power is required, be EXTREMELY careful when checking the transformer. A transformer in good condition produces VERY high voltage at the output terminals. Check the transformer as follows: 1. Connect the transformer lead to a properly gapped spark plug. The gap should be 0.050 inch, plus or minus 0.005 inch. See Figure 6. 2. Establish a good ground between the spark plug and the heater. Be careful not to let any part of your person become a portion of the ground circuit. 3. Plug the heater cord into an outlet of the pro- per voltage. Observe the spark between the plug's electrodes. Htheground is good and a spark does not jump between the electrodes, the transformer is de- fective. Replace it. 4. To replace the transformer, take out the two screws which attach it to the motor mounting bracket. Make sure that the new transformer mounting tabs are free of paint, to assure a satisfactory ground. 9. Reinstall the attaching screws, and make wiring connections in accordance with Figure 9. 6. Snap the spark plug lead tightly onto the plug terminal, to prevent its coming loose when the heater is moved. | F. CHECKING THE MOTOR STARTING CIRCUITS In case the motor fails to start when the cord is plugged in, and the thermostat is set to call for heat, 4/73 check the motor and its starting circuit components as described in the following paragraphs. 1. Mechanical Check. Spin the motor by turning the fan blades by hand. If the motor turns freely, make the electrical check as described in paragraph 2. Any stiffness of the motor indicates mechanical troubles. See "Motor Service," paragraph G of this Section. 2. Electrical Check. The heaters have 1/6 horsepower motors and separate starting relays. (See the Wiring Diagrams, Figure 9). NOTE The starting relay is “position-sensitive" and must be tested in the same position as when installed in the heater (with the con- tacts on the bottom). a. Takethe relay out of the heater by taking out the screw which holds its bracket to the left side of the lower shell, near the motor. CAUTION Avoid touching the bare wires on the ex- posed wire terminals. b. Take the black motor wire off its termi- nal of the starting relay. Touch this wire to the ter- minal of the red motor wire, at the relay. The motor should start. As soon as the motor reaches operat- ing speed, remove the black wire from contact. The motor should continue to run. c. If the motor starts, install a new relay, and reconnect the wiring according to the Wiring Diagram, Figure 9. d. Failure of the motor to start could re- sult from either of the following, assuming that all other circuits in the heater are operating correctly. (1) Internal fault in the motor, such as burned-out stator. A3513-00 -15- (2) Failure of the starting relay. e. Ifthe motor fails to start and the relay is found not to be the cause of failure to start, remove the motor and install anew or rebuilt motor. Send the defective motor to the nearest authorized service sta- tion for repair, or order a replacement motor from the Master Service Parts Department. NOTE When sending the motor away for repairs, remove the fan, the air filter housing, and the pump end cover. Take out the pump rotor and the carbon blades but do not dis- turb the pump body, which is the ring at- tached to the end of the motor. (See para- graph K for pump service instructions). G. MOTOR SERVICE 1. Applyafewdrops of oil to the fan-end bearing of a stiff motor. M this fails fo correct the starting difficulty, rebuild the pump, as described in paragraph K of this section. 2. During rebuilding of the pump, check the motor againfor stiffness. IX stiffness still exists, rebuild the motor according to the manufacturer's instructions. 3. Whenever a motor has beenrebuilt, be sure to check the pump rotor clearance as described in para- graph K-4 of this Section, before reassembling the motor into the heater. SETSCREWS MUST REST IN INNER GROOVE IN MOTOR SHAFT MOTOR SHAFT OUTER GROOVE FAN HUB INNER GROOVE MOTOR 223 Figure 10. Location of Fan on Motor Shaft 4. When you install the motor, be sure it is not misaligned after tightening the clamps. H. FAN SERVICE Replace a damaged or bent fan. Do not attempt repair except as a temporary emergency measure. Loosen two setscrews to remove the fan from the mo- tor shaft. Be sure the replacement fan has the same blade pitch as the fan that was removed. This is important in order fo retain the air flow and combustion charac- teristics of the heater. Check for proper fan location of the motor shaft. Make sure the fan is in the same position and location as before it was removed. See Figure 10. I. FUEL FILTER SERVICE 1. Remove the fuel filter from the heater and clean it, as described in Section II, paragraph G. 2. Before reinstalling the fuel filter, check the rubber bushing where it enters the fuel tank. Be sure the bushing is in good condition -- not cut or cracked. Replace a damaged bushing. 3. Reinstall the fuel filter according to Section III, paragraph G. Replace with a new filter if the con- necting parts will not provide an air tight connection. J. BURNER HEAD SERVICE 1, Takeoutthe spark plug and remove the burner head. Clean the entire burner head, as described in Section III, paragraph H. 2. If there is any sign of damage to the nozzle, or if it is impossible to clean out the nozzle by blow- ing compressedair into it through the outlet-end, re- place with a new nozzle, Always blow a nozzle out thoroughly with air, from the outlet-end, before in- stalling it into the burner. CAUTION NEVER try to open a nozzle passage with a drill. Any change in the size or shape of the passage will alter the flow characteristics. Protect the passage from damage whenever you work on the burner or nozzle. 3. Always install a new rubber sleeve whenever you install a nozzle into the burner. The sleeve is the part that helps maintain the needed pressure difference between the air and fuel chambers of the burner head. If bubbles have appeared in the fuel tank during opera- A3559-00 -16- tion, the rubber sleeve is probably leaking and should be replaced. 4. Be sure the seal washer, spring, and second seal washer are in place on the nozzle before you in- stall the rubber sleeve. 5. When seating the nozzle firmly against the burner head, do not apply too much pressure with the wrench, or the nozzle could be distorted. 6. Adjustthe sparkplug gap asdescribed in Sec- tion III, paragraph F. K. AIR PUMP REPAIR NOTE: Because of the close tolerances and cri- tical positioning of the parts, we recommend that only skilled mechanics attempt any repair of the air pump. The heater's air pump consists of a rotor with four carbonblades, rotating inside a pump body. The rotor is driven directly by the motor, and is supported by the ball-bearing end of the motor. One of the pump end plates is the motor's back end plate. The other pump end plate is part of the housing for the air intake and outlet filters. Handle all pump parts with care and keep them clean. The parts are made withclosetolerances. Dirt and oil on pump parts will hinder the performance of the pump. If pump repair is required, you may order a com- plete pump package, or individual parts, as shown in the Parts List, Section VI. 1. Disassembly. CAUTION Do not take the pump apart any further than needed to reach the parts which must be re- placed. a. Remove the end cover and take out the in- take and outlet air filters and the lint filter. Dis- connect the air line from the elbow. b. Hold a clean, dry cloth under the pump and remove the six screws that hold the end cover to the pump body. Catch the carbon blades in the cloth, if they fall out as the pump body is removed. c. Take all four carbon blades out of the rotor. Pull the rotor and the insert off the motor shaft. 2. Replacing Carbon Blades. a. Worn or sticking carbon blades cause 4/73 CHECK FOR SQUARENESS | OF FIT — MOTOR END SHIELD 7 ROTOR INSERT VA (FLAT SURFACE ON THIS SIDE) PUMP ROTOR Za MOTOR SHAFT 006 CLEARANCE GAP ADJUSTING SCREW FEELER GAGE PUMP BODY END SHIELD tn? Le” BLADE 877 Figure 11. Checking Clearance of Air Pump Rotor loss of air pressure. If the blades are worn, or are sticking in the rotor slots, replace them. (It is not necessary to remove the rotor or the pump body to replace the carbon blades). b. Install the carbon blades into the slots. 3. Replacing the Rotor. Use a new rotor only if deep grooves or un- even wear appear on the surfaces. Check the insert for wear, and replace it if worn or loose. To remove the rotor, first remove the pump body. 4. Reassembly of Air Pump. a. Install the insert in the pump rotor as shown in Figure 11, then assemble rotor on the motor shaft. When installing the rotor, take care to keep it perpendicular to the motor shaft. Attach the pump body to the motor with the two recessed screws which were removed to take it off. b. Adjustthe pump body to provide 0.005 to 0.006 inch clearance at the point shown in Figure 11. Measure the clearance with a feeler gage. Spin the motor by hand to be sure the rotor does not rub on the pump body. The proper clearance must be maintained. Be sure the recessed screws are tight after adjusting. c. Insertcarbon blades as described above. d. Install the endcover, using the six screws which were removed. Reconnect the air line. A3581-00 -17- Figure 12. Checking and Adjustment of Air Pump Pressure L. ADJUSTMENT OF PUMP PRESSURE 1. Remove the plug from the air filter hous- ing, and install the pressure gage (listed in paragraph B of this Section) into the hole. See figure 12. 2. Remove the upper shell and wire nuts at the photocell connections. Install a jumper lead across the photocell to bypass it. Tape these connections to prevent accidentally grounding against the shell. Re- install the shell, then start up the heater. 3. Pump pressure must be 4 psi plus or minus 1/4 pound. I the pressure is not within this range , adjust the pressure relief valve. 4, To adjust pump pressure, screw the valve stem in to raise the pressure; out to lower it. 5. Remove shell and disconnect jumper wire from photocell connections. Reinstall wire nuts to electrical leads (see figure 9).), Install upper shell, then remove the gage and replace the plug. M. REASSEMBLY OF HEATER 1. Put the heater back together in the reverse order of disassembly. 2. Checkall wiring to be sure it agrees with the wiring diagram. Be sure all electrical connections are tight. 3. Tighten the connections at both ends of the air line, and tighten the connection where the fuel filter is assembled to the burner head. 4. Make sure the electrode lead is snapped onto the spark plug and the transformer output terminal. 4/73 5. Besure all parts are in place and the screws are tight before attempting to use the heater. N. SAFETY CONTROL CIRCUIT 1. Testing. NOTE: The following testing procedures should be performed only if troubles indicate the safety control circuit may be at fault. Unplug the heater power cord. Disconnect and tape all motor leads from the relay. This will help prevent accidental injury and will prevent fuel from being ejected from the nozzle. Disconnect the red lead from terminal No. 4 of the circuit breaker (Fig- ure 9) and tape the end of the red lead. Make certain the reset button of the flame sensor control and circuit breaker is pressed in (figure 2). Set the thermostat (if used) to a temperature above the temperature of the surrounding air. Position the flame sensor, circuit breaker and relay assembly as instructed in the test procedure for the motor and relay, page 15. Remove the wire nut from the connection point of the white lead of the transformer, the white lead of the motor, the red lead of the flame sensor, the white lead of the power cord, and the white lead of the con- trol andcircuitbreaker. (See wiring diagram, figure 9.) Connect a meter or test light between the No. 4 terminal of the circuit breaker and the white wire to the motor and transformer. (See wiring diagram Figure 9.) There should be a voltage reading or the test light should come on between the terminal and the connection point when the power cord is plugged in. If a voltage reading is present or if the test light illuminates, the safety control circuit is functioning properly. If not, continue on with the testing. CAUTION Unplug the power cord before continuing the test. Check the photo cell (flame sensor) by removing it from the mounting bracket. Take care not to bend the bracket. Hold the rubber hood end of the photo cell against a metal surface such as the side of the shell to block off all light to the flame sensor; then plug the heater power-cord in. Observe the time between covering the photo cell and the actuation of the circuit breaker. If the tripping of the breaker occurs in approximately 15 seconds, the safety control circuit is operating normally. When A3565-00 -18- the circuit breaker contacts open, the light will go off or the meter reading will drop to zero. If the breaker does not trip after 20 to 25 seconds (as indicated by the light staying on or the meter con- tinuing to register voltage), UNPLUG THE POWER CORD and disconnect the blue lead of the photo cell from the blue lead connected to the breaker. Plug the heater in. The breaker should now trip within 15-20 seconds. If it does not, the flame sensor and circuit breaker is faulty and should be replaced. If it does tripwithin 15-20 seconds, the photo cell is faulty and must be replaced. UNPLUG THE HEATER. Reconnect the red wire to terminal No. 4 of the circuit breaker. Reconnect all leads in accordance with wiring diagram Figure 9. Test fire the heater to make sure it will function properly. If it does not, check all wiring connections according to wiring diagram, Figure 9. Repeat the testing procedure if necessary. An alternate method of testing the safety control circuit is to use an ohmmeter. Disconnect the red wire connected to terminal No. 4 and make the fol- lowing measurements. Terminal No. 1 to terminal No. 4 of the circuit breaker. (See figure 9.) The reading should be 0 withthe breaker unactuated (plunger in). The reading with the breaker actuated (plunger out) should be in- finite. Terminal No. 2 to the connection point of the white wire at the circuit breaker and the safety control flame sensor disconnected, very high (almost infinity). Terminal No. 2 to the white wire and the cell in the dark, approximately 500,000 ohms. Terminal No. 2to the blue wire connection point, approximately 100,000 ohms. 2. Replacement. Replace the photo cell by disconnecting the wires and installing a new unit. Do not bend the mounting bracket. To replace the flame sensor control and circuit breaker, disconnect the electrical leads from the unit, then remove the threaded ring securing the unit to the relay bracket. Install a new control and circuit breaker and install control and relay bracket as described on page 15. Test fire the heater. O. FINAL CHECK Put at least two gallons of fuel in the fuel tank, and test-fire the heater, after all service has been completed, to be sure it will operate satisfactorily. ‘ 5/73 516€ A3527-00 Figure 13. Heater Exploded View -19- HEATER GENERAL ASSEMBLY, EXPLODED VIEW Fig.13 Index Part No. Number Part Name Qty. 1 M13134-3B Shell, Upper 1 2 M16781-4 Chamber, Combustion 1 M11084-27* Screw (Combustion Chamber attaching front) 2 M11084-29* Screw (Combustion Chamber attaching rear) 2 3 M16660 Bracket, Photocell M10908-1* Screw (Photocell Bracket to Combustion Chamber rear head) 2 4 M16656-1 Cell and Bushing Assy 1 5 , Ref. Burner Head Assembly ‘ (See figure 14) 1 M11084-27* Screw (Burner Head to Combustion Chamber) 3 6 M16879 Air Line 1 7 M12461-27 Screw, Slotted hex hd. , No. 10-32 x 1/2 in. 1 8 M24717 Clamp, Tube 1 9 WLM-83 Lockwasher, No. 10 1 10 NPF-3C Nut, Plain No. 10-32 1 11 M15807 Strap, Retainer 1 M11084-27* Screw (Rstainer Strap to Lower Shell) 2 12 M23147 Fan 1 18 SF4-2-1/2K Setscrew, Soc. Hd., cup pt., 1/4-20 (Fan to Motor Shaft) 2 14 M23149-6 Motor Package Assembly (See figure 16) 1 15 M16661 Clamp, Motor 4 16 HC4-10C* Screw (Motor Clamps) 2 17 WLM-4* Lockwasher, 1/4 in. (Motor Clamps 2 18 NPC-4C* Nut, Hex, 1/4-20 (Motor Clamps) 2 19 M16777B Shell, Lower 1 20 M11084-27* Screw (Upper Shell to Lower Shell) 6 21 M1271-6* Nut, Tinnerman (Upper Shell to Lower Shell) 6 * Standard hardware. A3531-01 -20 - Fig.13 Index Part No. Number Part Name 22 M12330A Bracket, Shell Support M11084-27* Screw (Support Bracket to Lower Shell and Fuel Tank) M11084-29* Screw (Lower Shell to Support Bracket) 23 1000576 Grommet (Ignition cable thru Lower Shell) 24 M16646 Bracket, Motor Support M11084-27* Screw (Motor Support Bracket to Lower Shell and Fuel Tank) 25 M16697 Transformer, 5000 Volt M11084-27 Screw (Transformer to Motor Support Bracket) 26 M11954 Bushing, Strain Relief (Service Cord to Lower Shell) 27 M10813-34 Cord Assembly, Extension 28 M18360-4A Tank Assembly, Fuel 29 M23284 Cap, Fuel Tank 30 M18053 Screen, Filler neck 31 M10990-3 Bushing, Rubber (Fuel Filter into Fuel Tank) 34 M24982-5 Control Assembly, Safety 35 M25296-1 Bracket, Starting Relay Mounting 36 M12462-9 Relay, Starting RC2-2C* Screw (Starting Relay to Mounting Bracket) ST2-2AC Screw (Grounding) M11084-27 Screw (Relay Bracket to Shell) M9900-62 Wire Assembly, Black (To Starting Relay) M9900-80 Wire Assembly (to Breaker) M16615-1 Harness Assembly M13942-2 Connector (Cell and Bushing and Relay to Circuit Breaker) M13942-4 Connector (Relay Leads) Qty. HH Hab ba pa Fig. 14 BURNER HEAD ASSEMBLY Index Part No. Number Part Name Qty. 14- M23150-1 Burner Head Assembly 1 1 M16790-8 . Filter, Tube 1 2 M19630 . Filter, Fuel 1 3 M13849 . Nut, Flared 1 4 M16741-18 . Ring, Retaining 1 M23151-1 . Nozzle Adapter Assy 1 5 M16791 . . Connector, Male 1 6 M5976 . . Connector, Male 1 7 M8882 . . Sleeve, Nozzle Seal 1 8 M10659-1 . . Washer, Nozzle Seal 2 9 M10809-1 . . Spring, Nozzle Seal 1 10 M23103 . . Nozzle, Aspirating 0.66 GPH 1 11 M16535 . . Adapter, Nozzle 1 12 M10962-2 . Spark Plug 1 13 M16534 . Body, Burner Head 1 WHEELS, HANDLES, MARKINGS Fig.15 Index Part No. Number Part Name Qty. 1 M13830-2 Handle, Rear 1 2 M13831-2 Handle, Front 1 3 M12345-34* Screw, Handles and Wheel Support Frame to Fuel Tank 8 4 M12342-2 Wheel Support Frame 1 5 NTC-3C* Nut, Hex 10-24 Torque Lock 8 6 M16801 A Axle 1 7 M19295 Wheel 2 8 WPC-8C Washer, Flat 2 9 M16741-15 Ring, Retaining 2 TOUCH-UP PAINT Paint, Yellow, Aerosol Can Paint, Creen, Aerosol Can Paint, Black, Aerosol Can DECALS M27237-2 Decal, Model 1 M17071 Decal, Tradename 1 M27234 Decal, Wiring 1 M17081 Decal, Atomaster 1 M18196 Decal, Mfg. By 1 M16749 Decal, Safety Control 1 M22743 Decal, Warning 1 M228 98 Decal, NP 1 M25325 Decal, Reset 1 A3532-00 Figure 14. Burner Head Assembly Figure 15. Handie and Wheel Group _91- 5/73 3730 Figure 16. Motor Package Assembly Fig. 16 | Fig.16 Index Part | Index Part No. Number Part Name = Qty. No. Number Part Name Qty. - M23149-6 Motor Package Assembly Ref 10 M8643 . Blade 4 1 M16545 . End Cover, Filter 1 11 ‘M22456-1 Rotor 1 2 M12461-31* , Screw (Filter End Cover 12 М22009 ` . Insert 1 to Pump End cover) 4 13 M8645 . Pump Body 1 3 WLI-3 . Lockwasher, Internal No. 10 4 14 FHPF3-4C . Screw (Pump Body to Motor) 2 4 M12179 . Intake Air Filter 1 15 M5976 . Connector, Male 1 5 Mi2244-1 . Output Filter Assy 1 16 M22997 . Plug, Hex hd. 1 6 M11637 . Filter, Lint | 1 17 M23105 . Screw, Pressure Adjustment 1 7 M12233 . Front Cover, Pump (Port 18 M10993-1 . Spring, Compression Plate) | 1 | (Pressure Relief) 1 8 M12461-32* —. Screw (End Cover to 19 M8940 . Ball, 1/4 in. dia. 1 Motor) 6 20 m315:( M23407-—5 . Motor 1 9 WLI-3 . Lockwasher, Internal No. 10 6. * Standard hardware. Purchase locally. A3530-00 ~22~ WARRANTY We warrant Products sold by us to be in accordance with our published specifications or those specifications agreed to by us in writing at time of sale, Our obligation and liability under this warranty is expressly limited to repairing or replacing, at our option, within one year or as otherwise set forth in our published specifications, any product not meeting the specifications, WE MAKE NO OTHER WARRANTY, EXPRESS OR IMPLIED, AND MAKE NO WARRANTY OF MERCHANTABILITY OR OF FITNESS FOR ANY PARTICULAR PURPOSE. Our obligation under this Warranty shall not include any transportation charges or costs of installation or any liability for direct, indirect or consequential damage or delay, If requested by us, Products or parts for which a warranty claim is made are to be returned transportation prepaid to our factory, Any improper use, operation beyond rated capacity, substitution of parts not approved by us, or any alteration or repair by others in such manner as in our judgment affects the Product materially and adversely shall void this Warranty, NO EMPLOYEE OR REPRESENTATIVE IS AUTHOR IZED TO CHANGE THIS WARRANTY IN ANY WAY OR GRANT ANY OTHER WARRANTY, WE RESERVE THE RIGHT TO AMEND THESE SPECIFICATIONS AT ANY TIME WITHOUT NOTICE. THE ONLY WARRANTY APPLICABLE IS OUR STANDARD WRITTEN WARRANTY. WE MAKE NO OTHER WARRANTY, EXPRESSED OR IMPLIED. KOEHRING Koehring Master Division Dayton, Ohio 45401 А1632 -03
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