S6161-DR-FSE-010, REV 01
Contents
1. Parts 11 Figure 1 2 3 4 5 6 S6161 DR FSE 010 LIST OF ILLUSTRATIONS Picture of Oven Specifications Leg Installation Service Block Diagram Wiring Diagram Typical Exploded View Title Page 1 1 1 19 1 22 iii S6161 DR FSE 010 SAFETY SUMMARY GENERAL SAFETY NOTICES The following general safety notices supplement the specific warnings and cautions appearing elsewhere in this manual They are recommended precautions that must be understood and applied during operation and maintenance of the equipment covered herein Should situations arise that are not covered in the general or spe cific safety precautions the commanding officer or other authority will issue orders as deemed necessary to cover the situation No work shall be undertaken energized equipment or circuits until approval of the commanding officer 15 obtained and then only in accordance with Naval Ships Technical Manual NSTM S9086 KC STM 010 Chapter 300 DO NOT REPAIR OR ADJUST ALONE Under no circumstances shall repair or adjustment of energized equipment be attempted alone The imme diate presence of someone capable of rendering first aid is required Before making adjustments be sure to pro tect against grounding If possible adjustments should be made with one hand with the other hand free and clear of equipment Even when power has been removed from equipment circuits dangerou2. 400 F until coating of oil starts to smoke Using a smooth edged spatula vigorously scrape down cooking surface removing food scraps and deposits Wipe with rolled burlap and lightly re coat with unsalted cooking oil Drop temperature to resume cooking or turn griddle thermostat to off position The eriddle takes approximately 20 minutes pre heating time to 350 F Proper Griddle Temperatures Eggs 300 325 F Bacon 300 F Sausage 300 F Hash Browns 350 F Grilled Sandwiches 350 F Chops 350 F Cutlets 350 F Steaks 350 F Hamburgers 350 F Pancakes 375 F French Plates Your Lang range top if so equipped has two 9 inch diameter French Plates each operated by a separate control Each French plate is controlled by a six heat seven position switch located on the range top control panel The six heat positions allow you the versatility to simmer or rapidly boil in pots of many different sizes For initial pre heat turn switches to the number 2 position and allow to idle for 2 hours CAUTION All French plates should be turned to the off position when not in use Allowing these elements to stay in the full on or high position with nothing on top to absorb or dissipate the heat is detrimental to element life MAINTENANCE INSTRUCTIONS Daily Cleaning WARNING Burns could occur when dealing with hot grease Empty grease drawers daily or when they are 1 3 full They are easily removed for washing Clean exterior o
3. access Remove the element mounting screws located near the top of the oven Gently pull the element into the oven cavity There is enough wire connected to the element to allow easy access to the terminals located behind the element mounting plate Move each wire from the existing terminal to the corresponding terminal on the new element DO NOT mix up these wires After all wires are transferred to the new element feed the wire back through the access hole in the back of the oven and attach the element to the oven wall with the screws removed earlier Replace the baffle Element Replacement Range GRIDDLE Raise the griddle plate up to allow access to the bottom of griddle plate Remove the wires from the element s to be replaced DO NOT mix up these wires Remove the 5 nuts and washers holding the element pan assembly to the griddle It will drop down exposing the griddle elements Remove the defective element s and replace with the new one s Rebolt the element pan assembly to the bot 1 17 S6161 DR FSE 010 tom of the griddle being careful not to pinch the thermostat tube Replace the element wires onto the correct ter minals Lower the griddle plate making sure the thermostat bulb is far away from any live terminals Restore power to the range and resume normal operation Circular Speed Units if so equipped Raise the speed unit frame up to allow access to the underside of the unit Remove the nut holding the mounting bracket to th
4. are sometimes needed Test equipment 1 8 S6161 DR FSE 010 Volt OHM meter VOM Checking circuit continuity can often be done with an ordinary electric light bulb preferably the 7 1 2 watt size for compactness an alligator clip test probe and 110 volt plug all wired in series however this piece of equipment leaves much to be desired An accurate volt OHM meter with a thermocouple range along with a plug in adapter for A C ampere mea surements will provide for all the electric and temperature tests necessary The Simpson model 22S V O M with temperature range and the model 150 AMP clamp plug in adapter comprise a recommended combination This test Instrument combination 15 available from the Simpson Electric Company 5200 W Kinzie Street Chicago Illinois 60644 Phone 312 379 1121 Representatives in principal cities see yellow pages Temperature Measurement The thermocouple accessory included with the above recommended VOM is quite suitable for all open space temperature measurements Some difficulty will be found however when measuring griddle or hot plate surfaces The welded ball of metal joining two rather flexible wires of the thermocouple doesn t provide for sufficient rigidity to make the firm surface to thermocouple contact required for a valid read ing An excellent surface pyrometer may be obtained from Claud S Gordon Company Chicago Illinois of Cleveland Ohio Type LY 840 Unless the applianc
5. the OHM meter check for continuity by connecting to one terminal on the block and using the probe locate the terminal that acts as the other end of the loop The switches and other components in the loop must be in the on position to satisfy continuity requirement If continuity is not attained from the block diagram and wiring diagram locate the circuit loop and termi nals involved Verify no continuity between terminals on fuse block or C B rack with associated switches in the on position From the wiring diagram locate the component terminal in this loop and attach one test lead from the OHM meter With the other test lead check continuity with each of the associated C B or fuse terminal One C B or fuse terminal will indicate continuity the other terminal will show a broken connection some where in the circuit between the test leads From the wiring diagram locate and check for continuity all component terminals indicated between the test lead locations until the discontinuity is located Replace the part wire terminal lug or simply tighten the termi nal screw Electrical Resistivity A careful study of the wiring diagram will reveal almost any individual heating element can be isolated for a continuity or a resistance test simply by operating the proper switches In this manner the ohmic value of the heating element can be determined and when used in conjunction with the voltage applied the wattage can be calculat
6. the retaining clips holding the thermostat sens ing bulb in place Feed the bulb through the oven wall into the control panel area Remove the wires attached to the thermostat terminals Remember the terminal each wire was on and attach the wires to the same terminal on the new thermostat Remove the screws holding the old thermostat to the front of the control panel Discard old thermostat Mount the new thermostat to the control panel carefully feed the sensing bulb through the oven wall and reattach the sensing bulb to the oven side using the retaining clips removed earlier Close control compart ment Restore power to oven Thermostat Replacement Range Raise the griddle plate up to allow access to the bottom of the griddle plate The thermostat is the silver tube clamped to the bottom of the griddle through the slot in the element holder Remove bracket holding the sensing bulb to the bottom of the plate Fish the old tube and bulb through the wire way out of the front of the range Install the new thermostat by reversing these steps CAUTION After installing the new thermostat be positive the silver tube is not near any exposed terminals If the thermostat tube touches any live terminals it will be destroyed and have to be replaced again Element Replacement Oven The oven element is located inside the oven cavity To replace the element remove the baffle at the back of the oven This will expose the elements to plain view and allow easy
7. 1 Series Range 525 Ibs Depth 38 Depth 29 OVERHEAD SWITCH BOX 75 LBS Height with legs 36 Height 17 ELECTRICAL DATA ALL MODEL 215 SERIES RANGES THREE NOMINAL AMPS PER LINE PHASE LOADING roTAL THREE PHASE MODEL K W PERPHASE 208 VOLTS 240 480 VOLTS Ert ats PM I TG ts t I Li 216 483 692 625 418 599 542 209 208 240V 15 103 8 66 100 50 For availability and specilication change contact factory WHEN ORDERING SPECITY VOLTAGE AND PHASE Specifications subject to change without notice Figure 2 Specifications S I a m 2 Z DIA 4 PLACES RF21SM A Marine Bolt Down Leg Hole Pattern Spacing and Size Figure 3 Leg Installation 010 454 19195 S6161 DR FSE 010 Loading the F6S Convection Oven Turn thermostat and power switch to the off position Adjust oven support racks to positions or spacing for the product to be baked Pan support racks should always be spaced for maximum uniform spacing The word uniform in this case is of great importance Counting from the top of the oven rack position 2 4 6 are used most frequently for bake items having a relatively high profile Using even numbered rack positions provides the uniform spacing essential to uniform baking results Cookies grilled cheese sandwiches and like items can be
8. PEED UNITS TOPIGRILL WI6 HEAT SWT ELECTRICAL CONNECTIONS POWER TERM RANGE OVENS SUPPLY BLOCK TOP IstDECK 2nd DECK 3rd DECK mu s 2 3 THREE PO 415 1 2 T 3 T r PHASE 13 246 3 r 2 CONVECTION OVEN RANGE ELECTRICAL DATA LOADING MODEL LOADING TOTAL KW PHASE 2 NUMBER RF 215 162 iF eS 162 2F 6S 64 3F 6S 66 CAUTION CHECK OVEN FOR PROPER DIRECTION OF FAN ROTATION CHANGE PHASING OF POWER IF NECESSARY TO CORRECT TERMINAL BLOCK IST DECK 50 AMP 3 POLE CIRCUIT BREAKER USE ON SERIAL C35006 AND ON THREE PHASE 480 VAC MARINE ONLY THIS DRAWING HAS BEEN DEVELOPED FROM rar LANG MFG CO DRAWING 1 61105 29 AND MODIFIED BY j ave NSWCCD SSES TO MAKE 45 8 LEGIBLE ID eet e1108 2 MATERIAL Figure 5 Wiring Diagram 1 19 1 20 Blank S6161 DR FSE 010 PARTS LIST Parts List Lang Mig Co Redmond WA 15 Range Plate Assembly Lang Mfg Co Redmond WA 50401 01 50401 02 50401 03 For Service information or any further questions contact Lang Manufacturing LANG MANUFACTURING COMPANY P O BOX 905 REDMOND WA 98073 0905 Phone 206 885 4045 FAX 206 882 2373 1 21 S6161 DR FSE 010 Figure 6 Typical Exploded View 1 22 S6161 DR FSE 010 1 23 1 24 Blank S6161 DR FSE 010 REAR SECTION TECHNICAL MANUAL DEFICIENCY EVALUATION REPORT TMDER NOTE Ships training activities supply points depots Naval Shipya
9. ROM AN INTELLIGENT ELECTRONIC SOURCE KNOWN AS STANDARD GENERALIZED MARKUP LANGUAGE SGML THERE IS NO LOEP ALL CHANGES IF APPLICABLE ARE INCLUDED THE PAGINATION IN THIS TM WILL NOT MATCH THE PAGINATION OF THE ORIGINAL PAPER TM HOWEVER THE CONTENT IS EXACTLY THE SAME ANY CHANGES RECEIVED AFTER RECEIPT OF THIS TM WILL ONLY FIT IN THIS PAGINATED VERSION RECORD OF REVISIONS 1 RECORD OF REVISIONS 2 Blank S6161 DR FSE 010 FOREWORD This technical manual provides description operation maintenance troubleshooting repair and parts list information for the Electric Convection Oven Range This technical manual is intended for guidance of and use by personnel operating and maintaining the equipment described herein Ships training activities supply points depots Naval Shipyards and Supervisors of Shipbuilding are requested to arrange for the maximum practical use and evaluation of NAVSEA technical manuals All errors omissions discrepancies and suggestions for improvement to NAVSEA technical manuals shall be forwarded to COMMANDER CODE 310 TMDER BLDG 1388 NAVSURFWARCENDIV NSDSA 4363 MISSILE WAY PORT HUENEME CA 93043 4307 on NAVSEA SPAWAR Technical Manual Deficiency Evaluation Report TMDER NAVSEA form 4160 1 All feedback comments shall be thoroughly investigated and originators will be advised of action resulting therefrom One copy of NAVSEA form 4160 1 is at the end of each separately bound technical manual 8 1 2 x 11 inch
10. S6161 DR FSE 010 0910 LP 105 5863 REVISION 1 TECHNICAL MANUAL FOR SGML VERSION SEE RECORD OF REVISIONS ELECTRIC CONVECTION OVEN RANGE MODELS RF21SM A RF21SM C RF21SM G DISTRIBUTION STATEMENT E DISTRIBUTION AUTHORIZED TO DOD COMPONENTS ONLY CRITICAL TECHNOLOGY 15 SEP 2006 OTHER REQUESTS SHALL BE REFERRED TO THE NAVAL SEA SYTEMS COMMAND SEA 09T WARNING THIS DOCUMENT CONTAINS TECHNICAL DATA WHOSE EXPORT IS RESTRICTED BY THE ARMS EXPORT CONTROL ACT TITLE 22 U S C SEC 2751 ET SEQ OR THE EXPORT ADMINISTRATION ACT OF 1979 AS AMENDED TITLE 50 U S C APP 2401 ET SEQ VIOLATIONS OF THESE EXPORT LAWS ARE SUBJECT TO SEVERE CRIMINAL PENALTIES DISSEMINATE IN ACCORDANCE WITH PROVISIONS OF DOD DIRECTIVE 5230 25 D DESTRUCTION NOTICE DESTROY BY ANY METHOD THAT WILL PREVENT DISCLO SURE OF CONTENTS OR RECONSTRUCTION OF THIS DOCUMENT SUPERSEDURE NOTICE THIS PUBLICATION SUPERSEDES S6161 DR FSE 010 DATED 1 NOV 1986 AND ALL CHANGES THERETO PUBLISHED BY DIRECTION OF COMMANDER NAVAL SEA SYSTEMS COMMAND 15 SEP 2006 S6161 DR FSE 010 RECORD OF REVISIONS REVISION NO DATE TITLE AND OR BRIEF DESCRIPTION PREPARING ACTIVITY 15 SEPTEMBER INCORPORATED TMDER Q90616 02 GK07 CHANGE AUTHO 2006 RIZED BY NSWCCD SSES CODES 9442 AND 9783 THE FOL LOWING WAS CHANGED FIGURES 1 5 AND 6 ADDED CIRCUIT BREAKER TO PARTS LIST MODIFIED OPERATING INSTRUCTIONS NOTE THIS TECHNICAL MANUAL TM HAS BEEN DEVELOPED F
11. WER SOURCE Main Breaker Fuses In House TERMINAL BLOCK In unit distribution PIGTAILS Breakers Fuses CONTROLS unit panel and or remote panel Thermostat Thermostat Contactor contactor Thermostat N 3 heat switch 3 heat switch Infinite switch Infinite switch 1 contactor HEATING ELEMENTS BRANCH CIRCUITS Speed units Fuses Hot plates Breaker Griddles Safety SW Ovens Thermal protector Internal lights Strip heaters Motor contactor control Wire coils Warmers Fryers Broilers Figure 4 Service Block Diagram S6161 DR FSE 010 WARNING Disconnect from power before attempting any repair Troubleshooting Guide Overview Troubleshooting SYMPTOM PROBLEM REMEDY EEE eee ses Open Change Fuses match match Oven or Top takes too long to bake Improperly Phased Phase Range to match Power and won t maintain temperature Supply per Wiring diagram Electrical Trouble Shooting Detailed WARNING Disconnect power before opening panels All parts referred to are illustrated and identified on Figure 6 Typical Exploded View It is assumed that service personnel are familiar with the intended operation of the appliance unit as well as the expected results and that he knows the functional characteristics of each component and their inter relationship Through interrogation of the operator try to determine the probable cause and ext
12. art and turn ing the power back to the unit would simply blow the same component again Taking the time and having the patience to track down locate and repair hidden sources of trouble is well worth the effort From the block diagram under controls note that the left hand column indicates that thermostats 3 heat switches infinite switches and contactors are the first components in the loop proceeding from the terminal block or fuse terminal and or pigtail end Locate the proper component from the wiring diagram Operate the next component in the loop or loops connected to the terminal block fuse or pigtail in question Watch OHM meter for the reappearance of the ground while rotating thermostats to highest temperature posi tion while rotating infinite switches to high position lastly depress the associated contactor armature down to close the contacts If and when the ground reappears as an infinite switch a thermostat or contactor is operated we have now identified the faulty circuit loop Turn off all other switches thermostats etc not associated with this loop With the probe on the OHM meter leadwire check each output terminal of the component just operated to locate grounded lead Inspect the terminal and connecting lug for loose or wild wire strands that may be caus ing the ground 1 14 S6161 DR FSE 010 Disconnect lead from terminal Avoid excessive use of force as it may move the rest of the wire or the swit
13. be the same or only very slightly higher In this case slightly higher resistance means 0 01 OHMs higher As mentioned there is a negligible difference It is important here to stress that any perceptible increase in resistance read at the terminal strip can be construed as forerunner of a service call in the near future It is well known that any resistance offered by a conductor to the flow of an electrical current will produce heat The conductor will rise in temperature until it is able to radiate heat as fast as the heat is produced Most metals slowly form a layer of the metal oxide over its surface when exposed to air even at low temperatures Raising the temperature increases the rate of formation Some oxides make good insulators magnesium oxide for example Most oxides offer more resistance to the flow of electricity than its parent metal Increasing resis tance produces a rise in temperatures which encourages a faster formation of the oxide All mechanical joints of metal bearing an electrical current and exposed to air will form oxide layers on both surfaces causing an increase in heating The heating rate will vary inversely with the cross sectional area of the joint Fortunately this chemi cal change takes place rather slowly allowing a good solid mechanical junction to carry heavy electrical loads for quite some time Loose or poorly made connections of course will deteriorate at a comparatively rapid rate Electrical connections such a
14. ch enough to disturb the ground Check disconnected lead and component terminal for ground Tests performed indicates that all of the loop is good up to the component now being investigated If the component terminal test indicates a ground replace component If the ground did not reappear from the wiring diagram locate the next component in the loop Operate com ponent through all positions until the grounded position is reached as indicated on the OHM meter Repeat procedure as necessary to find and replace grounded component or wire This step by step or terminal by terminal testing must be continued until the grounded part is found and eliminated Electrical Continuity Every electrical circuit or loop must have continuity There must be a complete unbroken electrical current conducting path from the input terminal to the output terminal otherwise the circuit will not function Broken wires incompletely stripped insulation under crimped on terminal lugs loose terminal nuts and bolts broken switches and burned contacts represent a few of the many ways a circuit can lose its continuity From the wiring diagram it will be noted that every wire going into the equipment from the power cable terminal block C B rack or fuse panel can be traced through the various components right back out to another terminal on that block C B rack or fuse panel WARNING Disconnect the unit from power source before testing Again using
15. ct from power before attempting any repair Page 1 12 WARNING Disconnect power before opening panels All parts referred to are illustrated and identified on Figure 6 Typical Exploded View Page 1 12 WARNING When testing for grounds power must be disconnected from unit Page 1 13 WARNING Disconnect the unit from power source before testing Again using the OHM meter check for continuity by connecting to one terminal on the block S6161 DR FSE 010 and using the probe locate the terminal that acts as the other end of the loop The switches and other components in the loop must be in the on position to satisfy continuity requirement Page 1 15 WARNING Disconnect range from power before attempting any repair Page 1 17 CAUTION Prior to putting any range or oven into full time operation at normal cook ing temperatures it must be thoroughly seasoned or dried out Moisture absorption in the closed spaces in the insulation and even inside the heating elements can cause future trouble if not properly treated Page 1 3 CAUTION All French plates should be turned to the off position when not in use Allowing these elements to stay in the full on or high position with nothing on top to absorb or dissipate the heat is detrimental to element life Page 1 7 CAUTION When scraping griddle surface do not scrape the splash guard It may eventually be cut through Page 1 8 CAUTION After insta
16. e bottom of the frame Remove the bracket and leaf spring Push the unit up through the top of the frame Transfer the wires from the old unit to the new speed unit DO NOT mix up these wires Place the new unit into the frame and bolt back down Lower the frame and resume normal operation Contactor Relay Switch Replacement Pull out control panel as previously outlined Remove the wires from the contactor or switch being changed Place those wires on the corresponding terminal of the new part Remove old part and mount new part with wires attached in the spot where the old part use to be Reinstall the control panel restore power to the oven Turn oven on set thermostat to 200 F and allow oven to cycle 3 times or until the technician is satisfied with the proper operation of the oven ARRANGEMENT MODEL DESIGNATI N AA TIRFZIS BEE GE reisn gt a T gt 2ND AND 3RD DECK WIRING IDENTICAL 1ST DECK RF21S C RF21S G 3RD DECK men D HEAT ELEMENT 2 THERMOSTAT 6HEAT SWITCH MOTOR PILOT LAMP CONTACTOR POWER SWITCH 480 VOLT LEADS CIRCUIT BREAKER FUSE TRANSFORMER TIMER BUZZER 2ND DECK TERMINAL BLOCK WELT 0066000000600 CONNECT WIRE FROM RANGE TOP TO OVEN CIRCUIT BREAKERS CONNECT WIRES FROM ADDITIONAL DECKS TO LOWER OVEN TERMINAL BLOCK BOTTOM DECK 50 AMP 3 POLE CIRCUIT BREAKER S6161 DR FSE 010 TOP SECTION WIRE DIAGRAMS 1234 12 34 EGO S
17. e operator has a good working knowledge of the electrical and mechanical functions of the equipment in question it is best to listen politely to what the unit won t do or is doing wrong nod your head knowingly then proceed on your own The service repair man must first of all know what the appliance is suppose to do and why meaning know the equipment you service read the service manual study the wiring diagram operate the knobs and controls and most important locate and associate the actual parts with the actual parts with the symbols shown on the wir ing diagrams As an aid to the familiarization of the service engineer with general arrangement of circuit and components as displayed by Lang products the following block diagram should render a great deal of assistance S6161 DR FSE 010 Ohms Law It should be noted that the power source and the heating elements are the main points The rest of the com ponents convey and or control the power on its way to the heating elements Branch circuits are added to pro vide further safety and contribute to the refinement of the basic cooking unit Let us not however degrade the value of components not used directly in producing heat as they are the parts that furnish the compliance with the safety requirement of Underwriter s Laboratories and the national and local electrical codes They are also the little differences that make our brand better that brand X 1 10 S6161 DR FSE 010 PO
18. e the appropriate switch thru off low med and high while checking each circuit to ground with an OHM meter Clip one terminal of the OHM meter to the grounding lug and using the other lead probe each circuit termi nal on the row of C B s or check each lead of the pigtail if there are no internal breakers There should be no movement of the OHM meter needle Any reading on the meter in this test indicates a ground is present in the circuit that must be removed before applying power For cooking units utilizing a power contactor in the heating element circuit special procedures must be fol lowed Prior to running the checks for grounds hand operate the power contactor and hold in the closed position while testing Or check the load side power out terminal of the contactor to ground Sometime prior to connecting a new piece of equipment to the power supply ascertain correct power supply is available Though not a common occurence and in spite of complete factory testing calibration changes of the thermo stats or short circuits can develop during the shipment of the unit Vibration while the appliance is being trans ported to its destination or being moved in the warehouse can cause many different kinds of trouble Long time storage under humid and or cold conditions can cause an apparent grounding out of the heating elements During warehouse storage and the time spent in transit all unprotected sheathed heating elements us
19. ed S6161 DR FSE 010 It is important to know here that the resistance OHMs of thermostats switches fuses circuit breakers and connecting wire is negligible The calculated wattage of a heating element should fall within 5 of the value stamped on the element sheath Turn all switches off Measure resistance of heating element only that is locate the heating element termi nals and carefully read the OHM meter This is the value that should fall within 5 of the calculated value A low by comparison resistance reading at the heating element terminals will result in a higher than normal current flow thus increasing the wattage consumed raising the temperature of the heating element High element temperatures shorten the life of the element cause the oven temperature to climb 20 F to 35 F beyond the tem perature set on the thermostat A high by comparison resistance reading at the heating element terminal will result in a lower than normal current flow that doesn t necessarily decrease the total wattage consumed per cooking period Slow preheat and slow recovery will be in evidence Isolate heating element loop by operating the proper switches Measure the loop resistance at the terminal strip C B or fuse panel strip Carefully note the reading on the OHM meter Compare the actual resistance value taken at the heating element terminals with those taken at the terminal strip The resistance value read at the terminal should
20. ent of the complaint This is particularly important where intermittent troubles occur If the description of the malfunction can be corerelated with careful visual inspection that is a fused switch burned insulation blown thermostat ruptured heating ele ment and or any one of a dozen similar casualties it is obvious that the component exhibiting electrical burn marks must be replaced Disconnect power and replace defective part or parts We must now find out why the appliance malfunctioned The replaced part could have been at fault or the defect is located elsewhere in the circuitry It must be understood that there is no easy shortcut way to troubleshoot Components used in Lang equip ment are good substantial parts with a reasonable life expectancy Repeated failure of the same part in any instal lation will not always be the fault of the part We must always look beyond the failure for the reason why Iden tical pieces of equipment scattered all over the world have functioned to the satisfaction of the user for many years Inadequate and fluctuating power source has been the cause for many operating troubles Without applying power to the unit measure line voltage and determine phase or phases fed to the appliance Ascertain that it agrees with the data on the nameplate 1 12 S6161 DR FSE 010 For units having C B panels flip all breakers to OFF position Voltage may be measured at the line side of breakers Ascertain that
21. es or larger Copies of NAVSEA form 4160 1 may be requisitioned from the Naval Systems Data Support Activity Code 310 at the above address Users are encouraged to transmit deficiency submittals via the Naval Systems Data Support Activity web site located at http nsdsa phdnswc navy mil tmder tmder generate asp lvl 1 Individual electronic TMs do not contain NAVSEA form 4160 1 but are linked to an electronic version on the resident CD ROM Therefore we encourage the user to transmit deficiency submittals via the Naval Systems Data Support Activity web site located above FOREWORD 1 FOREWORD 2 Blank S6161 DR FSE 010 TABLE OF CONTENTS Chapter Paragraph Page 1 MARINE CONVECTION OVEN RANGE 1 1 OUTSTANDING FEATURES gt s cece x Gee ee w ns 1 1 ARCHITECT SPECIFICATIONS 2 42 002 ea s a s ww W s s W en 1 2 INSTALLATION INSTRUCTIONS 1 2 OVEN OPERATING INSTRUCTIONS 1 3 RANGE TOP OPERATING INSTRUCTIONS 1 6 MAINTENANCE INSTRUCTIONS 1 7 SERVICE PROCEDURE ecs ioe u Ride son Se 1 8 MAJOR COMPONENT DISASSEMBLY REPAIR REPLACEMENT AND REASSEMBLY ow W aq Q REE RE ER ERR ER RE ad 1 17 PARIS LIST 244 seo ka REDE EEE pbe goea beag Aneena i 1 21 S6161 DR FSE 010 LIST OF TABLES Table Title Troubleshooting ss s eese s S e owe ow OE RO h OR W W
22. eventative applied at the factory Wipe COMPLETELY dry DO NOT use excessive water remembering this 15 a piece of electrical equipment Apply power and set thermostat dial to 200 F Allow griddle to heat until pilot light and thermostat starts cycling At this time apply a light coat of unsalted cooking oil or fat to the cooking surface Re set thermostat to 250 F and hold for 30 minutes Re coat any dry spots that appear with cooking oil Reset temperature to 300 F for 30 minutes covering dry spots with oil as they appear Liberal but not excessive use of oil or fat is recommended After 30 minutes at 300 F re set to 350 F coating dry spots if they appear for 30 minutes Raise tempera ture to 400 F or until the cooking oil starts to smoke Inspect for browning gummy spots Add a dab of oil to spot and work area with spatula Avoid scratching surface of griddle as new spatulas have sharp edges Approximately five minutes of smoking grease should be ample to thoroughly season the cooking surface food products can then be griddled without undue sticking The surface will improve with use and it is not truly seasoned until a brown almost black varnish of semi burned food particles is formed If necessary to repeat the cooking surface seasoning the temperature may be brought immediately up to grease smoking values simply by setting the thermostat dial 1 6 S6161 DR FSE 010 To maintain a well seasoned griddle surface set thermostat to
23. f the range with hot water and a mild detergent to maintain a gleaming appearance Keep the griddle plate surface clean After each cooking load scrape the griddle surface to remove any car bonized grease S6161 DR FSE 010 CAUTION When scraping griddle surface do not scrape the splash guard It may eventually be cut through Weekly Cleaning Once a week or when necessary the griddle surface should be thoroughly cleaned and reseasoned Use a griddle stone or wire brush Rub with the grain of the metal being careful not to scrape the splash guard A mild detergent with water or one of many commercial griddle cleaners may be used Be sure to rinse thoroughly Reseason the griddle Cleaning Oven Interior The stainless steel oven lining panels should be removed for cleaning They may be cleaned with a soap and water solution or commercial stainless steel cleaner The oven racks and rack supports may be cleaned by removing from the oven and soaking in a solution of ammonia and water Thermostat Calibration All thermostats are factory calibrated and are extremely reliable mechanical devices Calibration of thermostats should only be attempted if continued experience dictates unsatisfactory cooking tem peratures Calibrating the Griddle Locate a surface thermometer in the center of each 12 inch x 24 inch section Set the thermostat at 350 F and allow the temperature to stabilize Record three cycle on temperatures and three cyc
24. he meter indicating a ground Turn off all switches and thermostats and release contactor The ground should disappear If the ground doesn t disappear the trouble will be found between the terminal block or fuse terminal and from the wiring diagram first component of one of the loops connected to that terminal Disconnect the wires from the terminal to isolate the offending loop Check each lead with OHM meter probe If the ground has disappeared check the terminal and terminal block one strand of the lead wire may have been touching grounded metal eliminating the ground when the lead wire was removed If the ground still remains on one of the leads removed using the wiring diagram locate the next terminal in that loop Disconnect the second terminal and check for ground at the terminal and the lead end just discon nected If the now loose lead wire still shows a ground obviously it must be replaced The insulation might have rubbed through or one of the strands may have strayed from the terminal when installed A stray strand of wire rubbed insulation a pinched wire of the like with full supply voltage fed to it will quite frequently create enough electric arc heat to melt a terminal or wire The momentary flash doesn t trip a breaker or burn a fuse but does establish an extremely low resistance ground that will cause another component of the loop to burn out first and will then blow the fuse or trip a breaker In this case replacing the p
25. ing magnesium oxide as the insulator will absorb moisture It is this absorbed moisture that must be driven from the heating element Raising the temperature of the element too quickly may result in the generation of enough steam pressure to rupture the tubular sheath S6161 DR FSE 010 The thoroughly dry heating element should test out at 50 to 100 megohms when the test prods of a megger are connected to the element terminal and the incoloy sheath When exposed to changing temperatures and high humidities over a period of time it is not uncommon for this type of heating element to show from 5 000 to 10 000 ohms on the megger Unless there is a dead short indi cated these low reading elements can be brought back to a satisfactory dielectric strength by baking at 400 F for from four to eight hours Reading taken after this period should be in the 10 to 100 megohm range The information above indicates the procedure used to pin point the individual grounded circuit requiring repair We must now isolate the specific wire or component of that circuit causing the problem From the wiring diagram notice that each individual circuit originates at a terminal then through components in series or paral lel branch circuits back to a different C B or fuse terminal or pigtail end forming what might be called cir cuit loop Each terminal will have one or more loops associated with it With the OHM meter connect one probe on the terminal block and t
26. le off temperatures Average the six readings They should fall within 15 F of the set temperature To adjust the thermostat remove the knob and insert a small flat blade screw driver down the center of the shaft to a screw located at the end Turning the screw counterclockwise raises the surface temperature and turning the screw clockwise lowers the surface temperature Use caution when adjusting and turn the screw in 1 8 turn intervals to avoid over cor recting 1 8 turn changes the thermostat calibration approximately 5 F Calibrating the Oven Locate an oven thermometer or thermocouple in the center of the oven cavity Follow the same procedures for calibrating the grill SERVICE PROCEDURE Introduction A working knowledge of electricity basically OHM s law a V O M and an analytical mind are all that is needed Tools of the Trade A very great many service calls and calls back could be avoided if the serviceman had used the proper tool Almost never is a part of the electrical system used as structural part of the appliance Over tight ening of electrical connections and mounting screws results in stripping thread cracking plastic insulators and intermittent broken connections that are hard to locate Six to eight inch pliers side cutters and screwdrivers are large enough for any appliance repair job A 1 4 drive socket set along with a few open end and or box end wrenches is adequate for most jobs A few specialty tools
27. lling the new thermostat be positive the silver tube is not near any exposed terminals If the thermostat tube touches any live terminals it will be destroyed and have to be replaced again Page 1 17 vii viii Blank S6161 DR FSE 010 CHAPTER 1 MARINE CONVECTION OVEN RANGE OUTSTANDING FEATURES ITEM NO MODEL NO MARINE eus CONVECTION OVEN RANGE with the Largest Oven in the Industry TWO PIECE CONSTRUCTION STANDARD STAINLESS STEEL FRONT NICKEL PLATED SEA RAILS POSITIVE SHUT MARINE OVEN DOORS STAINLESS STEEL FRONT GRAB BAR CHOICE OF 5 TOP COMBINATIONS 8 Legs Optional VOLTAGE AVAILABLE T OVERHEAD SWITCH BOX 208 Volt A C 240 Volt A D 480 Volt A C MODEL RF21SM D Single or Three Phase D Wa e MIL R 43954 s 115 Volt D C 230 Volt D C Single Phase NSN 7310 01 104 3349 Figure 1 Picture of Oven Choice of cooking top arrangements are combinations of grills hot tops and speed units Each twelve inch section of cooking top shall be controlled independently by its own switch Convection oven controls include a 150 F 450 F thermostat on off switch damper control and a loud one hour timer Range controls are located in the cool zone to ensure a long and accurate life A spatula wide grease gutter is located on the front of the range Grease from the front gutter is funneled to a large grease drawer which runs the full width and depth of the range Oven is large e
28. mal cook ing temperatures it must be thoroughly seasoned or dried out Moisture absorption in the closed spaces in the insulation and even inside the heating elements can cause future trouble if not properly treated To season the Lang convection oven after making the proper electrical connection set the thermostat dial at 200 F and turn the toggle switch on Allow unit to cycle at least 15 minutes at this heat level Reset the thermostat to 250 F allowing the same time Then reset the thermostat to 350 F The oven should be operated at this heat level for 5 hours to insure the complete removal of all moisture 1 3 S6161 DR FSE 010 CONVECTION OVEN GALLEY RANGE TOP COMBINATIONS AND SPECIFCATIONS SPEED UNITS O 247x24 x OOO RF21SM A RF21SM D 1 24 x24 Grill Plate 2 12 x24 Hot Plates u RF21SM H 2 Speed Units 2 Speed Units 6 Speed Units Heat Switch hermostat RF21SM C RF21SM G 3 12 x24 Hot Plates 1 36 x24 Grill Plate 24 2 TOP UNITS AS SPECIFIED 23 38 RANGE BUILT 1 ELECTRICAL IN 2 PIECES CONNECTION LARGEST S SECTION va 22 OVEN DOOR IN OPEN POSITION OVERALL DEPTH WITH FRONT BODY 72 35 b zt GRAB BAR 40 or PARA FRONT VIEW TOP VIEW SIDE VIEW OUTSIDE RANGE DIMENSIONS INSIDE OVEN DIMENSIONS SHIPPING WEIGHT Width 36 Width 20 RF2
29. nough to hold six racks three supplied three optional Oven holds six 18 inch x 26 inch bun pans and three 12 inch x 20 inch x 4 inch food pans Each oven is hand packed with three inches of insulation on all sides for maximum efficiency and a cooler gal ley The range is provided with a 12 month warranty to cover all parts and labor Lang Marine Ranges meet the requirements of the United States Coast Guard and National Sanitation Founda tion Testing Laboratory The range is U L approved 1 1 S6161 DR FSE 010 ARCHITECT SPECIFICATIONS The Lang Convection Oven Range has the largest convection oven in the industry 17 inch high x 20 inch wide x 29 inch deep Standard finish shall be high quality stainless steel front front gutter and 6 inch front landing Balance is grey hammertone enamel Available at additional cost stainless steel sides back rear gutter back riser and 6 inch bolt down legs Ranges are furnished as standard equipment in two piece construction top and oven to permit entrance through narrow 26 inch galley doors Standard equipment includes nickle plated sea rails over the tops and speed units stainless steel grab bar and door latch Electrical switch box shall be furnished if required or specified Oven interior shall be constructed of non chipping aluminized steel Convection oven motors are 1 3 H P 1750 RPM prelubricated for long life Heating elements and fan are located on the right side of the o
30. placed on all rack positions for a full load because of their low profile in shallow pans or on cookie sheets When only 3 pans are required place them on racks 2 4 6 Non browning items casseroles frozen food products to be thawed and heated may be placed in all rack positions Time required increases with the load but results will be quite satisfactory if the individual containers are uniformly spaced as to rack position and their relative position on each rack Close oven door Set oven thermostat 20 to 25 F above baking temperature listed for the product turn switch on and preheat for 20 minutes Open the door and load the oven Reset the thermostat to desired baking temperature The damper on all Lang ovens is operated by a push rod whose end extends through the control panel ter minating in a control knob Its purpose is to establish and control the relative humidity in oven during a baking or roasting operation All baking should be done with the damper in the closed position Open damper for moist casseroles and roasting meats RANGE TOP OPERATING INSTRUCTIONS GRIDDLE The griddle surface is divided into 12 inch sections each of which is independently controlled by thermostats ranging from 150 F 450 F To the left of each thermostat is an indicator lamp The lamp is on when the griddle is heating Thoroughly clean the griddling surface with a damp cloth and a mild detergent to remove the coat of rust pr
31. rds and Supervisors of Shipbuilding are requested to arrange for the maximum practical use and evaluation of NAVSEA technical manuals All errors omissions discrepancies and suggestions for improvement to NAVSEA technical manuals shall be for warded to COMMANDER CODE 310 TMDER BLDG 1388 NAVSURFWARCENDIV NSDSA 4363 MISSILE WAY PORT HUENEME CA 93043 4307 on NAVSEA SPAWAR Technical Manual Deficiency Evaluation Report TMDER NAVSEA form 4160 1 To facilitate such reporting print complete and mail NAVSEA form 4160 1 below or submit TMDERS at web site http nsdsa phdnswc navy mil tmder tmder generate asp lvl 1 All feedback comments shall be thoroughly investigated and originators will be advised of action resulting therefrom Copies of NAVSEA form 4160 1 may be requisitioned from the Naval Systems Data Support Activity Code 310 at the above address TMDER MAILER Rear 1 Rear 2 Blank
32. s potentials may still exist due to retention of charges by capacitors Circuits must be grounded and all capacitors discharged prior to attempting repairs TEST EQUIPMENT Make certain test equipment is in good condition If a metal cased test meter must be held ground the case of the meter before starting measurement Do not touch live equipment or personnel working on live equipment while holding a test meter Some types of measuring devices should not be grounded these devices should not be held when taking measurements INTERLOCKS Interlocks are provided for safety of personnel and equipment and should be used only for the purpose intended They should not be battle shorted or otherwise modified except by authorized maintenance personnel Do not depend solely upon interlocks for protection Whenever possible disconnect power at the power distri bution source MOVING EQUIPMENT Personnel shall remain clear of moving equipment If equipment requires adjustment while in motion a safety watch shall be posted The safety watch shall have a full view of the operations being performed and immediate access to controls capable of stopping equipment motion FIRST AID An injury no matter how slight shall never go unattended Always obtain first aid or medical attention immediately and file an injury report in accordance with OPNAVINST 5102 1 series subj Mishap Investigation and Reporting iv S6161 DR FSE 010 SAFETY SUMMARY Con
33. s those found on relay contacts switches and thermostats function in an entirely different environment namely extremely high temperature and constant exposure of the hot surfaces to air Here every time a electrical current carrying contact or connection is broken an arc is formed The arc formed and seen as a spark is but a miniature of those created by arc welding and if allowed to persist would literally consume the terminals Each time a pair of contacts are broken an arc occurs high temperatures ensue and more oxidation takes place A heating element circuit on 208 volts whose control contacts have increased the resistance in the circuit as much as 0 44 OHM will lower its heating capacity by 250 volts Treating burned contacts as a minor discontinuity check terminal to terminal until they are located and then replace S6161 DR FSE 010 MAJOR COMPONENT DISASSEMBLY REPAIR REPLACEMENT AND REASSEMBLY See Figure 6 Typical Exploded View WARNING Disconnect range from power before attempting any repair Thermostat Contactors Relays Switches These parts are located behind the oven control panel assembly on the right hand side of each oven or behind the range control panel in the upper left of the range Remove the screws attaching the control panel to the front of the range Slowly pull out the control panel until the compo nent requiring replacement is accessible Thermostat Replacement Oven Inside the oven cavity remove
34. t crimped between the oven and range top Use the wiring diagram Figure 5 provided in this manual for determining the connections of the cook top wires to the oven terminal block Electrical service connection is made through the bottom of the oven A hole is provided for the attachment of 1 1 4 inch conduit See View of Figure 2 Use the wiring diagram provided in this manual to determine the electrical specification See Figure 3 for Bolt Down Leg Spacing and Bolt Hole Size OVEN OPERATING INSTRUCTIONS Controls and Signals Lights The toggle switch on the lower portion of the control panel energizes the fan motor and activates the thermostatically controlled circuit for the oven heating elements When this switch is in the on position the indicator light will be illuminated Rotating the thermostat control knob from off position to selected temperature causes indicator light to illu minate and closes the contactor that feeds power to the heating elements This light will cycle on and off as the thermostat calls for heat in the oven The blower however operates continuously while the toggle switch is in the on position The black control knob operates a damper in the oven vent stack Damper is open when knob is pulled out ward The two fuses on the control panel protect the electrical components from overload Initial preheat CAUTION Prior to putting any range or oven into full time operation at nor
35. the voltage measured agrees with that indicated on the nameplate Rarely will the service man find higher than nominal voltage being supplied from the power line 10 to 20 volts below that value is usually the case Constant fluctuation of applied voltage to resistive loads such as the griddles ranges and ovens being discussed has a quite noticeable effect on the uniformity of baked or cooked products Slow to pre heat slow to cook uneven browning if at all heavy soggy bake products are some of the many unhappy results of low voltage consequently inadequate heating conditions One effect of low voltage on inductive equipment such as the fan motor of the convection oven is to increase the current flow through the motor and control circuit If the voltage drops low enough the current will rise in value enough to kick out the motor protection circuit breaker stopping the fan motor with a given load will heat more than normal when supplied low voltage Where leads are joined in appliance junction box and with all control switches in off position the voltage may be checked by disconnecting wire nuts A visual check of the number of power leads and the voltage between them will verify characteristics of the power source WARNING When testing for grounds power must be disconnected from unit With all C B s in off position or pigtail power leads disconnected or all power input fuses removed turn on all thermostats Rotat
36. tinued RESUSCITATION Personnel working with or near high voltage shall be familiar with approved methods of resuscitation Should someone injured and stop breathing begin resuscitation immediately A delay could cost the victim s life Resuscitation procedures shall be posted in all electrically hazardous areas GENERAL PRECAUTIONS The following general precautions are to be observed at all times 10 11 12 13 14 Install and ground all electrical components associated with this system equipment in accordance with applicable Navy regulations and approved shipboard practices Ensure that all maintenance operations comply with Navy Occupational Safety and Health NAVOSH Program Manual for Forces Afloat OPNAVINST 5100 19 series Observe precautions set forth in NSTM S9086 KC STM 010 Chapter 300 with respect to electrical equipment and circuits Ensure that protective guards and shutdown devices are properly installed and maintained around rotating parts of machinery and high voltage sources Do not wear loose clothing while working around rotating parts of machinery Ensure that special precautionary measures are employed to prevent applying power to the system equipment any time maintenance work is in progress Do not make any unauthorized alterations to equipment or components Before working on electrical system equipment check with voltmeter to ensure that system is not energized WM Consider all circ
37. uits not known to be dead live and dangerous at all times When working near electricity do not use metal rules flashlights metallic pencils or any other objects having exposed conducting material Deenergize all equipment before connecting or disconnecting meters or test leads When connecting a meter to terminals for measurement use range higher than expected voltage Before operating equipment or performing any tests or measurements ensure that frames of all motors and starter panels are securely grounded Ensure that area is well ventilated when using cleaning compound or solvent Avoid prolonged breathing of fumes and compound or solvent contact with skin or eyes WARNINGS AND CAUTIONS Specific warnings and cautions applying to the system equipment cov ered by this manual are summarized below These warnings and cautions appear elsewhere in the manual follow ing paragraph headings and immediately preceding the text to which they apply They are repeated here for emphasis S6161 DR FSE 010 vi SAFETY SUMMARY Continued WARNING Remove the spacers and lower the top onto the oven Page 1 2 WARNING Make sure the six wire leads to supply electricity to the cook top are not crimped between the oven and range top Page 1 3 WARNING Burns could occur when dealing with hot grease Empty grease drawers daily or when they are 1 3 full They are easily removed for washing Page 1 7 WARNING Disconne
38. ven 208 V 240 V and 480 V ovens are equipped with hydralic magnetic circuit breakers as standard equipment INSTALLATION INSTRUCTIONS The Lang Model RF21 Convection Oven Range was designed in modular construction to allow passage through a 26 inch by 66 inch watertight door Do not remove crating until the unit is as near its location as practical This will help prevent damage nor mally associated with movement through door and hallways When the range is as close as possible to the final installation remove the crating material from the oven sec tion Look inside the oven cavity to locate the oven legs Remove the legs from inside the oven Attach the legs to bottom corner of the oven using two each 3 8 16 X 5 8 bolts per leg The bolts are provided and will also be found inside the oven Remove crating from range top Place spacers ie 2 X 4 wood block not supplied at the front and rear of the oven top Place the range top on the spacers that are located on top of the oven The six wire leads to supply electricity to the cook top are bundled under the front bottom of the top Route these wires through the bushing provided in the oven top Align the four locating pins in the bottom corner of the top with the four holes in each corner of the oven top 1 2 WARNING Remove the spacers and lower the top onto the oven S6161 DR FSE 010 WARNING Make sure the six wire leads to supply electricity to the cook top are no
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