Blodgett MT3855G-G Manuel de réparation

MT3855CONVEYOR OVENSERVICE AND REPAIR MANUALBLODGETT OVEN COMPANYwww.blodgettcorp.com50 Lakeside Avenue, Box 586, Burlington, Vermont 05402 USA Teleph

MT38556GAS BURNER COMPONENTSNOTE:  = ASAP Distributor Required Stocking PartsRef.No.PartNo.DescriptionRef.No.PartNo.Description40 22132 Burner Assy.

MT38557EXTERIOR COMPONENTSNOTE:  = Doors are not returnableRef.No.PartNo.DescriptionRef.No.PartNo.Description M2868 Door Assembly, Pull Down S/S(use

MT38558Ref.No.PartNo. DescriptionRef.No.PartNo. DescriptionM5485 Panel & Filter Assy. MT3855G(Qty 1) (After 11/14/95)XXXXX Control Box Cover w/ Lo

MT38559EXCLUSIVE TO EXPORTNOTE:  = ASAP Distributor Required Stocking PartsRef.No.PartNo.DescriptionRef.No.PartNo.Description88 M2276 Burner Assy.,

MT385510MT3855 CONTROL BOX(Control Plate and/or Gas Burner Components not Shown)

MT385511MT3855 GAS BURNER COMPONENTS(Control Box not Shown)

MT385512MT3855 SB CONTROL PLATE ASSY(M6590)

MT385513MT3855 EXTERIOR OVEN VIEW

ASSEMBLYCHAPTER 2

MT38551OVEN ASSEMBLY PROCEDURESRETURN AIR DIVERTERSFor units manufactured prior to 11/14/951. Slide the return air diverters into the oven andclip to

TABLE OF CONTENTSi1. INTRODUCTIONOven Specifications 1-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

MT38552CONVEYOR RACK ASSEMBLIESFor units manufactured prior to 11/14/95.1. Slide the drive side conveyor rack assembly(with the sprocket on the en

MT38553FOLDING CONVEYOR ASSEMBLYFor units manufactured after 11/14/95The conveyor must be installed from the left side(control box side) of the oven.1

OPERATIONCHAPTER 3

MT38551COMPUTER CONTROLLER123456789FIGURE 1CONTROL DESCRIPTION1. DIGITAL DISPLAY - Displays the time, temĆperature and controller related informa

MT38552PROGRAMMING PROCEDURESProgramming the Cook Time:1. Press the PROGRAM/ENTER key (8).2. Press the TIME key (7). The display readsPROGĆ? 

MT38553SEQUENCE OF OPERATIONCOMPONENT REFERENCENOTE: Refer to FIGURE 2 for component locaĆtions.1. COOKING COMPUTER2. BURNER VALVE RELAY3. BLOWE

MT385541123451918131514678911101216171717FIGURE 2

MT38555OVEN ADJUSTMENTS FOR COOKINGTEMPERATUREThe internal temperature of your product is very imĆportant; and should be taken as soon as the prodĆuct

CALIBRATION ANDADJUSTMENTCHAPTER 4

MT38551CONVECTION BLOWER MOTORSTO CHECK MOTOR ROTATION1. Remove the back of the oven body and verifyproper motor rotation. (See FIGURE 1)For motor p

TABLE OF CONTENTSiiOpen Loop System - Twin Belt 4-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . M

MT38552REGULATED GAS PRESSURE1. Let the oven run up to 510F (266C).2. Set the time to 7 minutes. You may now verifythe operational and regulated gas

MT38553COMPUTER CONTROL CONFIGURATIONINITIATING ACCESS MODEThe Cooking Computer provides a special AccessMode for setting and displaying certain compu

MT38554Boost Option - (versions 2.00 or 3.00)When the controller is in the ACCESS" mode,press the following buttons: CLEAR 2 1 2 ENTERto

MT38555TEMPERATURE CALIBRATIONTO ENTER THE CALIBRATION MODE1. Press the ON/OFF key until OFF is displayed.2. Press CLEAR 1 2 3 4 5 6 ENTER to enter th

MT38556BELT SPEED CALIBRATIONCLOSED LOOP SYSTEMTo enter the calibration mode:1. Press the ON/OFF key until OFF is displayed.2. Press CLEAR 1 2 3 4 5 6

MT38557OPEN LOOP SYSTEM - SINGLE BELTTo enter the calibration mode:1. Press the ON/OFF key until OFF is displayed.2. Press CLEAR 1 2 3 4 5 6 ENTER to

MT38558OPEN LOOP SYSTEM - TWIN BELTTo enter the calibration mode:1. Press the ON/OFF key until OFF is displayed.2. Press CLEAR FRONT BELT, FRONT

MT38559MOTOR CONTROL BOARD ADJUSTMENTHigh/low speed motor control board adjustĆment for 180 and 130 volt DC motorsNOTE: The motor control board i

MT385510Warning: Circuit components are not at ground potential! Use only a nonĆmetallic orinsulated adjustment tool. Shock hazards may occur with con

MT385511RERATING THE APPLIANCEDue to the lack of oxygen at higher elevations, theunit may need to be rerated. (The orifice size mayneed to be adjusted

INTRODUCTIONCHAPTER 1

MT385512CHECKING THE FIRING RATEMethod #11. Turn off all other appliances on the line. Pressthe ON/OFF key on the unit to call for heat.2. Using eithe

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TROUBLESHOOTINGCHAPTER 5

MT38551DC DRIVE SYSTEMPOSSIBLE CAUSE(S) SUGGESTED REMEDYSymptom #1 - Conveyor Belt will not run Oven in OFF mode. Loose computer controller cord con

MT38552COMPUTER CONTROL SYSTEMPOSSIBLE CAUSE(S) SUGGESTED REMEDYSymptom #1 - Computer controller displays: PROBE Ć OPEN Ć PROBE Ć SHORT andalarm buzze

MT38553HEATING SYSTEMPOSSIBLE CAUSE(S) SUGGESTED REMEDYSymptom #1 - Burner will not fire Oven in OFF mode. Emergency stop switch on OFF. Control ci

MT38554POSSIBLE CAUSE(S) SUGGESTED REMEDYSymptom #2 - Oven will not reach desired temperature Gas pressure to oven is too low. Top air plates missin

MT38555CONVECTION SYSTEMPOSSIBLE CAUSE(S) SUGGESTED REMEDYSymptom #1 - Blower motor(s) not running Oven in OFF mode. Emergency stop switch on OFF.

MT38556POSSIBLE CAUSE(S) SUGGESTED REMEDYSymptom #3 - Hood system does not operate when oven is on Fan exhaust/supply problem. Defective interlock c

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MT38551OVEN SPECIFICATIONSVENTILATION REQUIREMENTSThe hood should completely cover the unit with anoverhang of at least 6" (15 cm) on all sides n

TECHNICAL APPENDIXCHAPTER 6

MT38551INTERMITTENT IGNITION SYSTEMPRINCIPLES OF OPERATIONPilot flame sensing is a very important aspect of theignition controls operation. Three zone

MT38552SERVICE PROCEDURESService the IID system as follows:1. Make certain the thermostat contacts areopen.2. Check for proper supply voltage

MT38553REPAIRING THE ELECTRONIC IGNITIONSYSTEMFlame Sensing Current Maintenance:The flame sensor is made of carbon steel and subĆject to contaminatio

MT38554SERVICING THE INVENT HOODILLUSTRATED PARTS LISTQTY PART DESCRIPTION (SEE FIGURE 3) ITEM1 AMU/Exhaust Manifold/Duct Connection 11 AMU Duct Exten

MT385551234567891011121314151617182019FIGURE 3CLEANING AND MAINTENANCECAUTION!The oven and the ventilation system gethot during operation. Allow t

MT38556Wipe out the exhaust channel portion of theAMU/Exhaust Manifold/Duct Connection (item1) assembly. Brush and clean the guards of theoven co

MT38557PRESSURE CONVERSIONPRESSURE CONVERSION CHARTin/H2O P.S.I in/Hg mm/H2O mm/Hg kg/cm2bar mbar Pa kPa1 .0361 .0735 25.41 1.868 .0025 .0025 2.489 24

MT38558in/H2O kPaPambarbarkg/cm2mm/Hgmm/H2Oin/HgP.S.I29 1.047 2.132 736.8 54.18 .0736 .0722 72.19 7219 7.21930 1.083 2.205 762.2 56.04 .0761 .0747 74.

MT38559CONVERSION FACTORSCOMMON CONVERSION FACTORSMultiply By To GetBTU/hr .001054804 MJ/hr.0002931 kW.29285 WBTU/Ft3.0372589 MJ/m38.905102 kcal/m3MJ/

MT38552GAS SPECIFICATIONSGAS CONNECTIONSDomestic and General Export installationsThe gas line should be large enough to accommoĆdate the peak demand o

MT385510COOKING COMPUTER - TEMPERATURE VS RESISTANCET/F Res/Ohms T/F Res/Ohms T/F Res/Ohms T/F Res/Ohms70 541.12 230 711.43 390 877.15 550 1038.29375

MT38553ILLUSTRATED PARTS LISTSELECTRICAL COMPONENTSNOTE:  = ASAP Distributor Required Stocking PartsRef.No.PartNo. DescriptionRef.No.PartNo. Descrip

MT38554Ref.No.PartNo. DescriptionRef.No.PartNo. Description19 M6338 Belt, Wire S/S (Total Length38" SB (Per Foot) MT3870 18FT, MT3855 16 FT)M7889

MT38555CONVECTION COMPONENTSNOTE:  = ASAP Distributor Required Stocking PartsRef.No.PartNo.DescriptionRef.No.PartNo.Description33 M4224 Motor &