Service Manual
Contents
1. Contents Service Assembly Drawings WARM2 Frame and Sheeting WARMS3 Interior Cavity and Components WARMA Control Panel and Components General Overview Electrical Circuit Overview Temperature Controller Troubleshooting Procedures pupl A jo BOSTON MARKET M OTY BLOCK TERMINAL 7 POLE RELAY 30 AMP 120V CASTER 4 CASTER 4 LOCKING BRACKET DRAIN TUBE COVER BASE PAN PANEL SIDE PANEL REAR pu FRAME AND SHEETING DESCRIPTION WELDMENT ELECTRICAL MOUNT WARM2 jenuRW das PEEMWE eDueH pup A o Z AN 19328 PLUG ORAIN 19484 0 RING ORAIN PLUG 19376 UT DRAIN BUSHING 108183 IUSHING DRAIN 108175 OLT 1 4 20 X 1 00 C S 5 5 108139 PIN SIDE LINER RETAINER 108119 COVER BASE PAN 108050 ELDMENT DRAWER 108091 PLATE FACE DRAWER 108133 ROLLER LINER DRAWER 108167 WELDMENT LINER LEFT SIDE 108056 WELDMENT LINER REAR 108168 WELDMENT LINER RIGHT SIDE 108068 THERMOCOUPLE 1 8 DIA K TYPE THERMOCOUPLE 10 RING K TYPE 108063 HEATER SILICONE 108171 WHEEL BLOWER 108062 BRACKET ELEMENT 108059 ELEMENT 1250W 120V 108077 MOTOR BLOWER 120V 1 108057 WELDMENT CAVITY TEM QTY PART NO DESCRIPTION VELA NGE INC CLEVELAND RANGE INC BOSTON MARKET WARMING OVEN IN2. BAND HYSTERESIS The temperature at which the Heater Output will tum on or off can be offset from the setpoint by up to plus or minus 20 deg F 11 C Refer to the settings table on the next page This hysteresis 15 set at BMW334 Warming Cabinet the factory Do not change this setting lf for some reason this setting has been changed use the following procedure to return it to the factory setting Press and hold the PROG button Pressthe TEMP ADV button until the words dead band ON appear followed by a number This 15 the number of degrees that the controller will add to the setpoint value before it turns on the heater output minus number indicates that the heater will be turned on that many degrees below the setpoint Press the UP or DOWN button to change the ON hysteresis value Next press the TEMP ADV button until OFF and another number appears This is the tum off hysteresis value Again use the UP or DOWN arrow button to change the value Pressthe PROG button to return to the run mode of operation NOTE Setting the turn off hysteresis value lower than or equal to the tum on value is not permitted The controller will limit the tum on value to one half degree lower than the turn off value ERROR MESSAGES PROP lf the controller s thermocouple probe is open the controller displays Prob and all controller functions will be tumed off until the probe is replace
3. the control panel has nothing to do with the warming cabinet It is a feed through drain connection to the BMR32 rotis serie oven Basic Functions The cabinet consists of three storage drawers with large perforations that are enveloped by a double walled insulated cavity Moistened air is drawn through the drawers to the back of the warming cavity where it is warmed and recirculated through the drawers Operating Elements Beneath the drawers is a water heating pan The water is heated by two 500 watt surface contact heaters adhered to the bottom surface of the pan Behind the drawers in a sub cavity is an NN Air Heating El i 4 ement A 1 4 4 Circulation Fan Motor Water Pan LI m Water men Elements BMW334 Warming Cabinet gt gt 1 lt lt air warming and circulating system consisting of a small blower and a 1250 watt electric heating element Temperature Controllers The cabinet s environment is accurately controlled by two digital tempera ture controllers one controls air temperature and the other controls water temperature Two thermo couple probes sense the air and water temperatures The controllers are programmed at the factory to the desired air and water temperatures for the typical chicken product Once these controllers have been programmed no operator intervention is re quired The controllers display the actual temperatures of the air and water The set
4. G Injury or Death Hazard Death severe electrical shock or equipment damage can result from touching any component inside the unit when the unit is plugged into a live outlet When possible unplug the unit before removing the access panel prior to troubleshooting If it is necessary to troubleshoot with power applied use extreme caution during testing with the access cover removed Probable Cause Corrective Action Unit not plugged in Branch circuit breaker tripped or fuse blown Power switch defective Main power switch defective or wiring between power switch and both control lers faulty Both controllers faulty Plug power cord into live outlet Determine and correct cause of tripped breaker or blown fuse reset breaker or replace fuse Check switch replace if defective Check that power is being properly switched replace switch if defective wiring from switch to both controllers may be bad check wiring repair Remove controllers test on bench replace if necessary Discussion Ifthe controller is calling for heat but the air or water is not being heated the heating power circuit is faulty First check that the required contacts are closing if they are OK turn off power and check the heating elements and the wiring The Heater Output contact N O on the controller C1 or C2 is failed open The contact s of the heater contactor R1 or R2 are failed open The wiring between the controller a
5. Service Manual Technical Reference and Troubleshooting Guide BMW334 Warming Cabinet December 1996 rev 0 9 1333 East 179th St Cleveland Ohio 44110 Clev l A nd Phone 216 481 4900 Steam Cooking Speclallsts Facsimile 216 481 3782 A WELBILT Company Cleveland WARRANTY AND LIMITED EXTENDED WARRANTY COVERAGE LIMITED WARRANTY Cleveland Range products are warranted to the original purchaser to be free from defects in material and work i manship under normal use and service for the standard warranty period Cleveland Range agrees to repair or replace at its option f 0 b factory part which proves to be defective due to defects in material or workmanship during the warranty providing the equipment has been unaltered and has been PROPERLY INSTALLED MAINTAINED AND OPERATED IN ACCORDANCE WITH THE CLEVELAND RANGE OWNER S MANUAL CLEVELAND RANGE agrees to pay any FACTORY AUTHORIZED EQUIPMENT SERVICE AGENCY within the conti nental United States Hawaii and Canada for reasonable labor required to repair or replace at our option f o b factory any part which proves to be defective due to defects in material or workmanship during the labor warranty period This warranty includes travel time not to exceed two hours and mileage not to exceed 50 miles 100 miles round trip but does not include post start up tightening loose fittings minor adjustments maintenance cleaning or descaling The standard labor warra
6. TERIOR CAVITY AND COMPONENTS E z P o 2 JenueiN BIAS vEEMAGd WARM3 BMW334 Service Manual PLGSZ Olb hh On Pu01949 9 YS 1 1 1503 vv 13Nvd 10N1NOO NJAO ONIWBNVM l3 NVW NOISOH ONT 39NV4 ONVIBATIO NOJdhI2S30 LV AJO Wall BAWA BaN 961901 1 1N3AQ034 3AWA 3aNvH 26180 Z INNON 3AWA 330vu8 1 VaNVd TOXLNOD 38vi ssisor JN3AQ134 0u1NO2 3Nva 1 s 3univs3dw3i O81NOD2 990801 z 9 ivdS VOZ u33508 HolMS 591801 4 Nwug 3801 zigor e 3SOH l Jdid 1 SSVH8 oNuuJ z 6 140d 7103 Vive 1 1 691801 on 38n1 ezieor 11 Cleveland Range BMW334 Warming Cabinet General Overview The basic purpose of the BMW334 warming cabinet is to hold cooked meats in a temperature and humidity controlled environment until they are ready to be served It is designed for use with the BMR32 rotis serie oven which is installed on top of the warming cabinet Operating Procedure The warming cabinet is operated simply by turning the power on at the front panel The cabinet temperature is automatically maintained by two controllers The water level must be monitored by the operator and refilled when necessary NOTE The drain valve near the bottom of
7. d or reconnected FAIL When the cabinet is first turned on the controllers perform a self test lf the test determines that the controller s memory has failed to store the necessary settings the display will flash FAIL continuously and all functions will be disabled The controller will assume the following settings regula tion temperature set to minimum the offset value set to zero the tum off hysteresis set to zero and the tum on hysteresis will be set to one degree below the tum off hysteresis value If the controller fails the memory test and displays the FAIL message tum off power momentarily and tum it back on If repowering the untt corrects the memory problem reprogram per the parameters below and let the unit operate If not service will be necessary FACTORY SETTINGS TEMPERATURE CONTROLLERS Air Temperature Controller Setpoint Turn On Hysteresis Turn Off Hysteresis Probe Calibration Offset 180 degrees F 0 degree F 1 degree F 0 degree F Setpoint Turn On Hysteresis 0 degree F Turn Off Hysteresis 1 degree F Probe Calibration Offset 0 degree F gt gt 4 lt lt 150 degrees F Cleveland Range Inc BMW334 Service Manual TROUBLESHOOTING PROCEDURES Symptom UNIT APPEARS DEAD WHEN POWER SWITCH TURNED ON NO HEATING AT ALL AIR OR WATER BOTH CONTROLLERS APPEAR DEAD AIR AND OR WATER NOT HEATING BUT HEAT LIGHT IS ON Cooking Specialists WARNIN
8. illion QUALITY Silica less than 13 parts per million REQUIREMENTS Free Chlorine less than 0 5 parts per million Chlorides less than 25 parts per million pH factor acidity neutral 1 0 pH The foregoing shall constitute the sole and exclusive remedy of original purchaser and the full liability of Cleve land Range for any breach of warranty THE FOREGOING 15 EXCLUSIVE AND IN LIEU OF ALL OTHER WARRANTIES WHETHER WRITTEN ORAL OR IMPLIED INCLUDING ANY WARRANTY OF PERFORMANCE MERCHANTABILITY OR FITNESS FOR PURPOSE AND SUPERSEDES AND EXCLUDES ANY ORAL WARRANTIES OR REPRESENTATIONS OR WRITTEN WARRANTIES OR REPRESENTATIONS NOT EXPRESSLY DESIGNATED IN WRITING AS A WAR RANTY OR GUARANTEE OF CLEVELAND RANGE MADE OR IMPLIED IN ANY MANUAL LITERATURE ADVERTIS ING BROCHURE OR OTHER MATERIALS Cleveland Range s liability on any claim of any kind including negligence with respect to the goods or services D covered hereunder shall in no case exceed the price of the goods or services or part thereof which gives rise to the claim IN NO EVENT SHALL CLEVELAND RANGE BE LIABLE FOR SPECIAL INCIDENTAL OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES IN THE NATURE OF PENALTIES LIMITED EXTENDED WARRANTY COVERAGE The purchase of a Limited Extended Warranty Contract extends the standard warranty coverage to the purchased period of time one to four years from the date of installation start up or demonstration whichever is sooner October 1995
9. lt lt Check cabling between power switch and fan repair or replace Check fan and replace if necessary Check the Setpoint temperature press PROG and hold for 2 seconds the display will show alternately SET and PNT followed by the Setpoint value If value is incorrect press UP arrow button until value is correct complete programming details on pages 3 amp 4 Check setpoint as above adjust as needed Test probe replace with known good one if needed The controller s temperature display can be offset by up to plus minus 20 degrees to better match the characteristics of the thermocouple complete programming details on pages 3 amp 4 Test probe and replace 1f needed Tum off power to the cabinet pause and turn power back on if message clears let unit run if message returns controller is faulty and must be replaced Cleveland Range inc
10. nd the heater contactor R1 or R2 is open The R1 or R2 coil is open The air or water heating element has failed gt gt 5 lt lt If you can measure 120 VAC across the contacts they are open when they should be closed replace controller If you can measure 120 VAC across the contacts they are open replace the contactor Turn off and unplug warmer check wiring continuity reconnect or repair Turn off and unplug warmer check continu ity of coil replace if needed Turn off and unplug warmer check continu ity of the suspected element replace if needed BMW334 Warming Cabinet TROUBLESHOOTING PROCEDURE cont _ Syn Symptom Probable Cause Corrective Action CIRCULATION FAN DOES NOT WORK FOOD TOO COOL FOOD TOO WARM CONTROLLER DISPLAY SHOWS TEMPERATURE LOWER OR HIGHER THAN ACTUAL CONTROLLER DISPLAY SHOWS Prob MESSAGE CONTROLLER DISPLAY SHOWS FAIL MESSAGE HEATING ELEMENT Air Heater Resistance 12 ohms RESISTANCE CHECK Water Heater Resistance 29 ohms each Power not being delivered to fan Fan is defective Setpoint set too low Setpoint set too high Thermocouple probe faulty indicates to controller that temperature lower than actual The thermocouple output is out of calibration with the controller s temperture conversion circuit The thermocouple probe has failed open The controller s memory has failed the power up test gt gt 6
11. nty allows factory payment of reasonable labor required to repair or replace such defec tive parts Cleveland Range will not reimburse the expense of labor required for the repair or replacement of parts after the standard warranty period unless an Extended Warranty Contract has been purchased to cover the equipment for the balance of the warranty period from the data of equipment installation start up or demonstration PROPER INSTALLATION IS THE RESPONSIBILITY OF THE DEALER THE OWNER USER OR INSTALLING CON TRACTOR AND IS NOT COVERED BY THIS WARRANTY Many local codes exist and it is the responsibility of the owner and installer to comply with these codes Cleveland Range equipment is built to comply with applicable stan dards for manufacturers including UL A G A NSF ASME Ntl Bd CSA CGA ETL and others BOILER SteamGenerator MAINTENANCE IS THE RESPONSIBILITY OF THE OWNER USER AND IS NOT COV ERED BY THIS WARRANTY The use of qood quality feed water is the responsibility of the Owner User see Water Quality Requirements below THE USE OF POOR QUALITY FEED WATER WILL VOID EQUIPMENT WARRANTIES Boiler maintenance supplies including boiler hand gaskets are not warranted beyond the first 90 days after the date the equipment is placed into service if no preventive maintenance records are available showing descaling every 90 120 days Total Dissolved Solids less than 60 parts per million WATER Total Alkalinity less than 20 parts per m
12. orced open and heating is inac tive When in the program mode if the controller senses no operator activity after 2 seconds the an indication that no heating is taking place and the operator must press the PROG button to resume normal operation display will begin flashing This is Cooking Specialists DERE DO NOT OPERATE WITHOUT WATER IN PAN OFF gt gt lt lt BMW334 Service Manual CHANGING TEMPER ATURE SCALES Press and hold both the UP and DOWN buttons for more than 1 2 second to toggle between the F and C temperature scales The tempera ture scale can be changed in either the program mode or the run mode AJl parameters will be converted automatically CHANGING THE SET POINT TEMPERATURE The first display in the program mode shows alternately SET PNT followed by the setpoint temperature in F or C To change the setpoint press the UP or DOWN arrow button holding the arrow button down will cause an automatic repeat after one second When done viewing or changing the setpoint press the PROG button again to resume normal operation The new setpoint temperature is stored in the controller and it will begin to regulate to the new temperature To view or set other functions while in the program mode press TEMP ADV to scroll to another function On some controllers the button 1s labelled only TEMP SETTING THE DEAD
13. pomt temperatures can be displayed by pressing the TEMP buttons see procedure on page 3 BMW334 Warming Cabinet Electrical Circuit Overview The electrical circuitry of the BMW334 is very straightforward Electrical power is input at 120 VAC The unit draws 20 to 30 amps at full load Air Heater El ment 950 W When the unit is plugged in power appears Water Heater across the contactor heating elements R1 R2 Element 850 W H2 and but the heaters don t come on Water Heater until the temperature controllers energize the Element 650 W contactor coils SES Power Sgio The main power switch is double pole switching La 5 Electrical 2 both legs of the power input When the switch is P Schematic w turned on the circulation fan M1 comes on and BMW334 stays on Through a 24VAC step down trans Circulation former power is also applied to both temperature 0 controllers C1 and C2 which first perform lt y C1 Air i i s start up test then begin controlling Each controller closes its Normally Open contact Contactor as long as the programmed temperature set point has not been reached The small mdicating light next to each front panel display is lighted when ever the controller s heating contact is closed The controller s N O contacts energize contac tors R1 and R2 which provide the heavier current carrying capabilities needed by the resi
14. stive heating elements The Thermocouple probes that sense the air and Water Heater water temperatures are type K They must be Contactor connected in the proper polarity TEMPERATURE CONTROLLER TIMER TYPEK 18 28 VAC 12 240 THERMOCOUPLE CLASS2 1 AMP RES RED XFRMR N O Q 4 EC FA osel iI 1 gt gt 2 lt lt Cleveland Range Inc Temperature Controller The BMW344 uses two identical digital temperature controllers to regulate air and water temperatures Temperature is controlled by tuming the heating elements on and off There is an adjustable upper and lower deadband hysteresis The regulation setpoint temperature can be set m one degree increments Temperature display can be in either Fahrenheit or Centigrade configurable from the front panel The Heat On indicator will light whenever the Heater Output relay is energized TEMPERATURE DISPLAY During operation the displays show the actual air and water temperatures To view the setpoint temperature the temperature being controlled to press and hold the TEMP button Release the TEMP button when done THE PROGRAM MODE To make any changes to the controller s program press and hold the PROG button for 2 seconds This will cause the controller to leave the run mode and enter the program mode NOTE When a controller is in the program mode the heater output is f
Download Pdf Manuals
Related Search