Henkel, Inc. P.O. Box 1322 Hammond, LA 70404 (985) 345-2171 www.keenovens.com Henkel, Inc. P.O. Box 1322 * Hammond, Louisiana * 70404 * (985) 345-2171 www.keenovens.com Model K-50 Portable Oven Installation Instructions & Repair Parts List One Year Limited Warranty Henkel, Inc. warrants its products against defects in material and workmanship. Henkel, Inc. will either repair or replace without charge any properly installed product which fails under normal operating conditions within one year from date of installation, provided it is returned to our factory, transportation prepaid, and our inspection determined it to be defective under the terms of this warranty. The warranty covers only equipment manufactured by Henkel, Inc., and does not extend to transportation, installation, or replacement charges at the buyers’ facility; nor does it apply to any other equipment of another manufacturer used in conjunctions with Henkel, Inc. equipment. No other warranty, expressed or implies exists beyond that included in this statement. Recommended Spare Parts When it is critical to have continuous operation of this unit; we suggest having the following spare parts on hand: Heating Element Power Cord Thermostat General Information The K-50 Keen oven is a portable unit designed for use in the shop or field. This oven will protect electrodes from moisture during transfer from a holding oven to the job. It is light and easy to carry. The square shape gives this oven greater stability vertically and horizontally. It is made of steel, treated, then painted with a chemical-resistant blue paint. All Keen ovens are Mercury free. Keen Ovens Model K-50 Specifications Electrode Capacity 50lbs. 18" rods Volts (Specifiy) 120V or 240V AC/DC Current Draw 1.25 amps Watts 150W Thermostat Factory Preset/Field Adjustable Temperature Preset 275ºF : Range 100ºF-300ºF Insulation 1" Interior Dimensions 6" X 6 X 19" H Net Weight 20lbs. Shipping Weight 21lbs. Shipping Dimensions 10.5" X 9" X 22.75" Safety Precautions Read all instructions completely before attempting to operate this unit. *** SAVE THESE SAFETY INSTRUCTIONS *** To reduce the risk of electrical shock, fire, or personal injury follow the guidelines below: • • • • • • • • • Before connecting unit to a power source, be sure the voltage supplied is the same as that specified on the name plate of the unit. Check outlet to ensure proper grounding of the electrical cable. Have a licensed electrician check the A/C power outlet if you are not sure. Use this unit for its intended purpose as described by literature. Make sure power cord is located so that it will not be stepped on, tripped over, or otherwise subjected to stress of heat, oil, or sharp edges. Do not close doors on the cord. To reduce the risk of damage to the electric plug and cord, disconnect by plug rather than by the cord. Do not use this unit if cord or plug is in poor condition. If it has been exposed to weather or immersed in water, have a qualified serviceman inspect and replace parts as necessary. WARNING! NEVER HANDLE PLUG, CORD, OR UNIT WITH WET HANDS OR WHILE STANDING IN WATER. Use special care when moving heavily loaded units. Do not store combustible material on or around the unit. • • Do not operate this unit empty. When using the unit at a distance where an extension cord becomes necessary, a 3-conductor grounding cord of adequate size must be used for safety, and to prevent loss of power and overheating. Use only a UL listed extension cord suitable for outdoor use. Make certain wire size is large enough for A/C amperage rating of unit. Operation To load oven, open latch on lid and simply place desired amount of electrodes in oven. The oven capacity is 50 lbs. of 18” electrodes. To turn on the unit, simply plug the 8’ UL listed power cord into power source of appropriate voltage. Oven may be operated on direct current IF AMPLE VOLTAGE IS AVAILABLE. (Check name plate for voltage.) Unit will not heat to capacity without appropriate voltage. On 240V models, the plug is not supplied due to the many different receptical configurations in the field. When attaching the plug to the power cord, be sure the plug is an approved component and is rated for the proper voltage and amperage. All units meet electrical code requirements when used with a grounding plug and a grounded receptical. Temperature Setting The model K-50 oven is thermostatically controlled oven with a temperature range of 100º-300ºF. The thermostat is factory preset at 275ºF, but it is field adjustable. To change thermostat setting, see “Corrective Maintenance” section. Guide to Storage See the enclosed guide to storage. This guide may be used in the absence of storage information from the electrode manufacturer. In critical situations, contact your electrode manufacturer. Functional Description The K-50 oven is a portable oven that holds 50 lbs of 18” electrodes. The oven may be used to transfer welding electrodes from a holding oven to a job site or continuously as a small holding oven. Scheduled Maintenance The manufacturer recommends that the unit be unloaded and cleaned of debris and dust every three months by removing the plunger from center tube and turning unit upside down and tapping gently on bottom. It is recommended to inspect the power supply cord for damage at this time. Replace cord if damaged. Troubleshooting The Keen oven model K-50 requires a minimal amount of electrical knowledge to repair if necessary. IF OVEN FAILS TO OPERATE – NO HEAT 1. Check power source. 2. Check power cord continuity. Replace cord assembly if faulty. 3. If power supply cord checks out, disconnect oven from power supply and remove bottom cover and insulation. 4. Remove the two leads from thermostat terminals and check for continuity across terminals. If continuity is not present between thermostat terminals, replace thermostat. (See “Corrective Maintenance” section.) 5. If thermostat is good, check continuity of element. If continuity is not present, replace element. IF OVEN OVERHEATS 1. If oven overheats, adjust thermostat. (See “Temperature Setting” section.) 2. If thermostat calibration fails to lower temperature, replace thermostat. (See “Corrective Maintenance” section.) Corrective Maintenance CHANGING ELEMENT 4. Disconnect wires on heating element. 1. Disconnect power source. 5. Remove old element and replace with new one 2. Remove two screws from bottom of oven. 6. Rewire as in diagram. 3. Remove bottom cover and insulation. 7. Replace insulation and oven bottom. CHANGING THE THERMOSTAT 1. Disconnect from the power source. 2. Remove two screws from bottom of oven. 3. Remove bottom corner and insulation. 4. Disconnect wire terminals on thermostat. 5. Remove old thermostat and replace with new one. 6. Rewire as in diagram 7. Replace insulation and bottom, making sure wires are insulated from element. Model K-50 Wiring Diagram THERMOSTAT CALIBRATION & ADJUSTMENT 1. Follow instruction numbers 1, 2, and 3 from Changing the Thermostat. 2. Thermostat is readily visible in bottom of oven. Use small screwdriver and turn set screw. (Turning set screw clockwise decreases temperature. Turning set screw counter-clockwise increases temperature. One-fourth [1/4] turn equals approximately 35ºF.) 3. Replace insulation and bottom of oven. Model K-50 Repair Parts List ITEM # QUANTITY DESCRIPTION 1 1 * Elements 2 1 Power Cord 301155 3 1 Handle 430103 4 1 Bottom Cover 100204 5 1 Thermostat 1 1 1 120V 240V Neon Pilot Light Strain Relief Name Plate 6 7 8 120V 240V PART NUMBER 301019 301020 301024 301024 301085 301043 450103 K-50 ACCESSORIES LIST ** Please state model number and serial number and specify voltage and wattage when ordering repair parts, spare parts, or accessory parts. All necessary attaching hardware is supplied with each part ordered. (Item numbers refer to pictorial drawings below for repair parts.) HENKEL, INC. Phone (985) 345-2171 Fax (985) 345-5653 PO Box 1322 Hammond, Louisiana 70401 Manufacturer of KEEN Ovens Quality Since 1923. Flux and Electrode Stabilizing Guide Type (AWS) Air Conditioned Storage Before Opening Dry Rod Oven Holding After Opening Standard EXX10 EXX11 EXX12 EXX13 EXX20 EXX30 Iron Powder EXX14 EXX24 EXX27 Iron PowderLow Hydrogen EXX18 EXX28 Low Hydrogen EXX15 EXX16 Low-Hydrogen High Tensile EXXX15 EXXX16 180°F ± 25° two hours 80°F ± 20° 60% ± 10% RH 140°F ± 30° 90°F ± 20° 50% RH max 140°F ± 30° 90°F ± 20° 50% RH max 400°F ± 50° 90°F ± 20° 50% RH max 400°F ± 50° 90°F ± 20° 50% RH max Granulated or Agglomerated 180°F ± 25° two hours 325°F ± 25° one hour Three hour total 180°F ± 25° two hours 700°F ± 100° one-half hour Two & one-half hour total 180°F ± 25° two hours 600°F ± 100° one-half hour Two & one-half hour total 400°F ± 50° 180°F ± 25° two hours 700°F ± 100° one-half hour Two & one-half hour total 180°F ± 25° one hour 90°F ± 20° 50% RH max 240°F ± 25° one hour Three hour total Stainless Inconel Monel Nickel Brasses Bronzes Hard Surfacing Special Alloys After Exposure to Moisture a Sufficient Time to affect Weld Quality Recondition Rebake Step 1 Step 2 350°F ± 50° one hour 225°F ± 50° Two hour total 90°F ± 20° 50% RH max 240° F ± 50° Flux Not required 700°F ± 100° ∅ two hours CONTACT YOUR ELECTRODE MANUFACTURER FOR SPECIFIC INFORMATION INVOLVING CRITICAL OPERATIONS. Electrode coating should not be exposed to the rebaking temperature without first having been reconditioned at a lower temperature. Failure to observe this rule will result in breakdown of electrode coatings. After rebake, lower temperature to holding level until reissue. IMPORTANT: This table is offered as a guide to proper storage and oven holding temperatures for the most common electrodes in use today. In addition, recondition/rebake procedures for electrode coatings that have been exposed to moisture for a sufficient period of time to affect the weld quality are included. Good judgment and the manufacturer’s recommendations should be your guide. Note: In the HTS Stainless electrode groups, and 15 & 16 type coatings, there can be a greater difference in the maximum temperature requirements for rebaking than those shown. This can be handled by special request to the particular manufacturer involved.