Installation/Service Manual Freas Microprocessor - Cole
Contents
1. YN gai Di PS SS MS i WIRING y H 2 amp 625 Freas Uven 48 32 SEMS NUTS REAVER MEER STRIE BLACK WALL PANEL 1 2 CONNECTOR HEATER 230V OUTLET BOX NOTE 2200 WATTS PHILLIPS 8 172 7 LG BLACK 8 EXT TOUTH I MAIN LEAD WIRES SS WASHER BODY INSULATION SET ES ere LABEL TUBULAR TYPE SPEED MOTOR 115V ee 4 CABLE TIES TEMP SENSOR ASS Y MOTOR SUPPORT BRACKET BLK 5 16 18 HX SS M SCR NUT DIFFUSER WALL ASS Y OIFFUSER BLOWER WHEEL WALL ASS Y ROTOR INTAKE PLATE Models 605 amp 625 Freas Uven 15 F E3021 MANUAL 31058 PRT 9 91 FRONT PANEL 8 PHILLIPS 1 2 LG PI amp P2 PLUG INID CONTROL PANEL ASSEMBLY 98 32 SEM PLATED KNOB DIA ACCESS PANEL ASSEMBLY 8 EXT TOOTH SS WASHER 8 32 SEM NUT PLATED 8 PHILLIPS 1 2 LG PLATED BLACK TOP LEFT AND BOTTOM RIGHT HINGE 8 PHILLIPS 1 2 LG PLATED PLATED SILKSCREENED DAMPER PLATE 8 32 SEM NUT PLATED OUTER DOOR FINAL ASSEMBLY SILKSCREENED KNOB INDICATION MHUELS 605 amp 625 FREAS LIVEN 90901 4 21 ACCESS PANEL ASSEMBLY BLACK 8 EXT TOOTH SS WASHER 8 32 SEM NUT PLATED 8 PHILLIPS 172 LG PLATED BLACK FRONT PANEL 8 PHILLIPS 172 16 PLATED N CONTROL PAN2. ELECTRON CORPORATION Installation Service Manual Freas Microprocessor Controlled Ovens 8 Model 605 6050 6051 PRECISI Model 605P 6052 6053 IL 625 6054 845 Model 645 6056 Thermo Electron Corporation Millcreek Road Box 649 Marietta Ohio 45750 USA Phone 740 373 4763 Toll Free 800 848 3080 FAX 740 373 4189 ManualP N 3177897 Rev D Dated 16JUN06 THE MATERIALIN THIS MANUAL IS FOR INFORMATION PURPOSES ONLY THE CONTENTS AND THE PRODUCT IT DESCRIBES ARE SUBJECT TO CHANGE WITHOUT NOTICE THERMO ELECTRON CORPORATION MAKES NO REPRESENTATIONS OR WARRANTIES WITH RESPECT TO THIS MANUAL INNO EVENT SHALL THERMO BE LIABLE FOR ANY DAMAGES DIRECT OR INCIDENTAL ARISING OUT OF OR RELATED TO THE USE OF THIS MANUAL For repair information or replacement parts assistance from the manufacturer call Technical Services using our toll free telephone number 888 213 1790 FAX 740 373 4189 REVISION STATUS INDEX DATE AMENDED PAGES NOTES Initialrelease new aesthetics Add plastics melt blurb to caution note 361001 32 34001 700 new manual manufacture location ECR 23496 updated elec specs to UL report Contents Introduction A haaa a a sakun Eag 1 Unpacking and Damage u l U sadi davon
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5. Insertion recess Bracket insertion groove n 625 645 insulation tightly around sensor back portion 5 High Limit Thermostat CAUTION OBSERVE THE FOLLOWING WHEN REPLACING THE THERMOSTAT ASSEMBLY BE SURE THERE IS NO CONTACT BETWEEN THE CAPILLARY AND PART OF THE HEATER COIL CARE MUST BE EXERCISED WHEN HANDLING THE THERMOSTAT CAPILLARY SINCE A SHARP BEND WILL CRIMP OFF THE HYDRAULIC OPERATING MEDIA a Remove four screws from top hinge of door left door on 645 ovens and lift door off of bottom hinge b Remove Air Volume Control knob by unscrewing counter clockwise c Remove High Limit thermostat knob using a 3 32 allen wrench d Remove eight screws from control panel e Disconnect all wires from the thermostat f Remove the two screws holding the thermostat to the chassis g Remove left hand diffuser wall located inside of the oven h Remove bracketthat holds bulb of thermostat to top of oven and also remove bracket from the capillary itself i Remove outside left panel j The thermostat can now be removed by pulling capillary out through the wall of the oven k Reverse the preceding procedure to replace the thermostat Troubleshooting 2 CAUTION SERVICE SHOULD BE PERFORMED BY QUALIFIED SERVICE PERSONNEL DISCONNECT THE UNIT FROMITS ELECTRICAL SOURCE DISCONNECTING 3 ANY COMPONENT FROM THE CIRCUIT WITHOUT PRIOR REMOVAL OF
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8. THE POWER SOURCE MAY CAUSE DAMAGE OTHER CIRCUIT COMPONENTS To use this chart find the applicable symptom and perform applicable checks and or tests in the order they are listed 1 through 11 Door Gasket Misaligned Dirty Heat Loss Inspect door gasket to make certain it fits firmly against the chassis at all points Replace if damaged Vent Shutter Cap Make sure the vent shutter cap is not closed Open to maximum to maintain higher temperatures vent shutter cap may have to be partially closed Troubleshooting Chart Possible Causes Test Procedure Corrective Action 5 Y i iu M A Temperature not uniform or fluctuating Temperature is being controlled atthe wrong temperature C Low heat not reaching desired setpoint temperature SP 5 D Constant heat overheating E Noheat Possible Causes Test_ Procedure Corrective Action 1 Wiring loose broken or shorted Improper wiring is listed first because it is applicable to all symptoms Itis not necessary to disassemble the oven and check all wiring and connections at the first indication of a problem However whenever you suspect a component is the cause of the problem also check all wiring and connections associated with that component and or problem 10 em Loading Test the unit when empty if results are sa
9. Vent Shutter Cap Intake amp Exhaust 88786 77386 12 Assembly Drawings OUTSIDE BODY ASSEMBLY THERMOSTAT 2 MOUNTING BRACKET N 8 SPEED NUT CLIP VERTICAL LINE 80 4 ra Non A 1 4 20x2 1 2 THREADED STUD SKID PALLET 1 CONTROL DAMPER SPACER T 32x17 SOC HD SET SCREW BOTTOM i RIGHT HINGE WASHER 1 3 8 CATCH ASSEMBLY LG LEVELER 8 SPEED SCREW NUT CLIP Models 605 amp 625 Freas 13 F E3021 MANUAL 31058 PRT NOTE THESE ARE THE HOLES YOU ROUT ITEMS 23 33 amp 36 THROUGH B LARGE CABLE CLAMP NOTE FOR 31056 ONLY 605 FREAS OVEN 1157 LEAD MUST BE COVERED WITH 36A WHITE HEAT SHRINK TUBING SULH THAT THE WIRE LEAD IS COVERED SMALL CABLE CLAMP AIR BAFFLE 4 CABLE TIES TEMP SENSOR ASS FOR A 10 INCHES FROM THIS ENO THE RED WIRE LEAD F E3021 MANUAL 31058 PRT REF GROUND TU ACCESS PANEL SHOWN SHEET 3 OF 4 Models 605 14 GU gt THERMOSTAT E ee 6 32 1 4 dA PH SS LJ 1
10. blower wheel e Remove motor mounting bolts and carefully withdraw motor f Replace motor in reverse order The blower wheel must be positioned 1 4 from blower intake plate which is adjacent to the heater 2 Heater Assembly Perform steps b and c of motor replacement Disconnect bus bars from old heater and attach to the new heater Reassemble by reversing preceding steps WARNING DISCONNECT OVEN FROM ITS ELECTRICAL POWER SOURCE 3 Microprocessor Controller See illustration on page 16 Models 605 625 or page 17 Model 645 a Remove Air Volume Control unscrewing counterclockwise knob by b Remove High Limit thermostat knob using a 5 64 allen wrench c Remove six screws 8 for Model 645 securing access panel assembly to side of oven Remove access panel Note Ground wire attached to access panel Ground wire will retain access panel assembly Be careful when removing access panel to avoid damaging ground wire d Disconnect two mate and lock connectors P1 amp P2 from rear of control compartment by compressing tabs and pulling straight out e From inside oven remove three screws located on the front left edge f While holding front panel from front side of oven remove two screws located between door and front panel Remove front panel control panel assembly g Remove the six 8 sem nuts 8 for Model 645 securing control panel assembly to front panel h Setcontrol panel a
11. ridi ada dung 1 aaa a 2 Installation 3 Explanation of Controls 3 Operati n A A 5 MANION ANG 7 Parts Replacements aaa aaa a ia aih 7 Troubleshooting 10 Parts Replacement ae a 12 Assembly DrawingS sss aa 13 Wiring Diagranmi aaa aaa aa rn 21 Warranty 22 Introduction Your satisfaction and safety are important to Thermo and a complete understanding of this unit is necessary to attain these objectives As the ultimate user of the apparatus it is your responsibility to understand its proper function and operational characteristics This instruction manual should be thoroughly read and all operators should be given adequate training before attempting to place this unit in service Awareness of the stated cautions and warnings and compliance with recommended operating parameters together with maintenance requirements are important for safety and satisfactory operation The unit should be used for its intended application alterations or modifications will void the Warranty WARNING AS A ROUTINE LA
12. 1 and 2 LINE voltage If you have approximately 1 VAC with terminal 3 disconnected or have LINE voltage with 3 5 to 26VDC present replace the solid 10 CALIBRATION Perform CALIBRATION as outlined in the CALIBRATION TEMPERATURE OFFSET section on page 6 Heater Element s The heater bus bar terminals are located in theleftside compartment Removethe outside left panel for access A continuity check can be made on the heaters to ascertain whether broken or open Remove one of the wires from a bus bar before taking measurement There are two heater banks in parallel so a wrong value of resistance could indicate one of the banks is open The cold heater resistance should be approximately Model 605 5 7 ohms for 115V 120V model Model 605 23 ohms for 208V 230V model Model 625 15 ohms for 208V 230V model Model 645 11 5 ohms for 208V 230V model Microprocessor Controller If all other components check out to be good and performingthe CALIBRATION OFFSET and CALIBRATION does not solve the problem the controller should be replaced state relay 11 Model Total Watts Total Amps Blower Maximum 6050 6051 Motor Rated 6052 6053 Temp in C LU 66779 5080 4800 1 6 3175960 3175958 3175959 3175960 Sensor Ass y Temperature RTD1 3167134 Latch amp Catch 3167171 Hinge Kit 2 67211 Leveling Screw Do 88R8 ____ 67208 Soe
13. 442 230V 31057 8 P 605 247322 230 2200 31058 31083 625 amp 6255 00715430 2307 31058 31083 625 8 6255 247323 230V 3300 31060 645 00715450 230V 31060 645 247324 230V 4400 SO L G3331Sl933 L006 OSI uoneuuojul Jo1nquisip e20 Jno loeluoo WSN eui episino 4 pue uonejedo AueJew jueuudinbe uo suonsenb noA JeNsue 94 9M 9 0 0 pue VSN 064L L2 999 1e S S eoiuu2e INOA Ileo peJinbai J pue AlInjeJeo paud jueuudinbe Jno YM si ouueu INOA SlonpoJd 5501 Jo 150 ol jenuenbesuoo Jo Aue eq Jou oway TIVHS 5 YVINDILYVd SS3NJLId YO ALNNIGVLNVHOYAW dO SAILNVYYVM ON YO 1V3HO N3LLIHAA H3HI3HM S3ILNV32IVAA YSHLO dO NI ANY 5 SI ALNVYYVM SIHL uoneunsep go4J syed
14. BORATORY PRECAUTION ALWAYS WEAR SAFETY GLASSES WHEN WORKING WITH THIS APPARATUS This product is not intended nor can it be used as a sterile or patient connected device In addition this apparatus is not designed for use in Class or III locations as defined by the National Electrical Code Unpacking and Damage Save all packing material if apparatus is received damaged This merchandise was carefully packed andthoroughly inspected before leaving ourfactory Responsibility for its safe delivery was assumed by the carrier upon acceptance of this shipment therefore claims for loss or damage sustained in transit must be made upon the carrier by the recipient as follows Visible Loss or Damage Note any external evidence of loss or damage on the freight bill or express receipt and have it signed by the carrier s agent Failureto adequately describe such external evidence of loss or damage may result in the carrier s refusing to honor your damage claim The form required to file such a claim will be supplied by the carrier Concealed Loss or Damage Concealed loss or damage means loss or damage which does not become apparent until the merchandise has been unpacked and inspected Should either occur make a written request for inspection by the carrier s agent within 15 days of the delivery date then file a claim with the carrier since the damage is the carrier s responsibility By following these instructions careful
15. EL ASSEMBLY 1207 8 32 SEM NUT PLATED NOTE Pl amp P2 PLUG INTO CONTROL PANEL ON KNOB DIA SILKSCREENED DAMPER PLATE 2 48 32 SEM NUT PLATED NS SILKSCREENED KNOB INDICATION OUTER DOOR FINAL ASSEMBLY Mode 4 Freas LEFT amp BOTTOM RIGHT HINGE gm e PHILLIPS 172 LG PLATED TOP RIGHT amp BTM LEFT HINGE 48 PHILLIPS 172 LG PLATED SMALL CABLE CLAMP AIR BAFFLE 4 LG CABLE TIES TEMP SENSOR ASS SAFETY THERMOSTAT 56 32 X 1 4 PH SS MS Z8 32 X 1 4 PH SS MS 32 Z BRACKET COVER LARGE CABLE CLAMP 9 PHILLIPS 1 2 LG PLATED BODY WIRING HARNESS MODEL 645 FREA VEN 18 F E3021 MANUAL 31060B PRT 14478090 FEVIVANVWA EcOea 4 61 8 32 SEMS NUT NOTE 172 CONNECTOR OUTLET BOX HEATER JUMPER STRIP PANEL WALL 8 EXT TOOTH SS WASHER HEATER 230V 1 PHILLIPS 8 X 172 LG BLACK BODY INSULATION SET LABEL TUBULAR TYPE SPEED CLIP MOTOR 1 6 230V BOHZ TEMP SENSOR ASS RIGHT HAND DIFFUSER WALL ASS 9 PHILLIPS 1 2 LG PLATED MOTOR SUPPORT BRACKET 4 0 CABLE TIES 5716 18 HX SS M SCR NUT BLOWER WHEEL i ROTOR INTAKE PLATE LEFT HAND DIFFUSER WALL ASSEMBLY 9 PHILLIPS 172 LG PLATED 48 PHILLIPS 172 LG PLATED MODEL 645 FREAS LIVEN 1Hd V090LeV
16. IVYINVIANLcOE3V 0c OUTSIDE BODY STUD ASS Y p 8 PHILLIPS 172 16 8 SPEED CLIP MOUNTING BRACKET THERMOSTAT 17 VERTICAL LINE 90 174 20x2 172 LG THREAD STUD DAMPER SPACER 10 32 1 2 SUC HD SET SCREW MEDIUM STRENGTH LOCTITE DAMPER CONTROL ARM ASS Y TOP RIGHT BOTTOM LEFT HINGE 8 PHILLIPS 1 2 LG CATCH 8 PHILLIPS 172 LG B S PEED NUT CLI 4 Eu N 1 3 8 0 0 3 8 16 X 2 1 2 LG LEVELER SCREW LEFT BOTTOM RIGHT HINGE 8 PHILLIPS 1 2 LG p MDDEL 645 AS EN Lud 20637 le WIRING DIAGRAM FREAS OVENS 115 amp 230V CONTROL CHASSIS NOTE SEE CONTROL CHASSIS CHART BELOW W1 CONTROL BOX HARNESS P N 00336621 15 J1 W2 P1 HARNESS BODY PIN 00336622 1157 18BK 1 188K PIN 520573 JUMPER STRIP 2REQD 082 rev ALL MODELS HIGH LIMIT 18K 2 188K z OMHR2 O P N 00321703 115V P N 00321704 230V OPENS ON 108K TEMP RISE 1 gt P2306 150 E DS1 larceny HEATER NOTE sni HEAT ri J
17. OMPLETED QUALIFIED PERSONNEL ONLY Oven Location Best operating results are obtained by choosing a location as free as possible from dust drafts or severe temperature changes which can affect the performance of the oven All four legs of the oven are adjustable to compensate for unevenness of the installation site Anelectrical source of proper characteristics should be near at hand The ambient temperature should be between 10 and 40 C Allow if possible 1 5 feet of free space from left oven wall This space will allow easy access to the electrical compartment of the oven for maintenance In any case 6 inches of free space should be provided for proper ventilation of the electrical compartment Electrical Connections Important Please read carefully WARNING FOR PERSONAL SAFETY THIS APPARATUS MUST BE PROPERLY GROUND All models are supplied with a junction box located on the rear of the oven The National Electrical Code must be observed for proper fusing and size of service wires Electrical power mustbe supplied to the oven with permanent wire connections as a line cord is not provided The service wires should be connected to the three conductors inside the junction box by a QUALIFIED ELECTRICIAN green conductor furnished with the oven must be connected to a well grounded conduit system The electricalratings for each modelare printed on the nameplate attached to the oven Electrical Connection Chec
18. SEE HEATER CHART BELOW PIN 248343 10RD 4 18RD n5 Jw HRA 1 00321603 115V O TIMED HEAT 00321604 230 PIN 311098 154 11 2 108K MAIN POWER 4 CIRCUIT BREAKER T1 18027 P N 294080 115V 230V L PIN 223602 115V a 20 5 223600 230V BK 188K LOAD UNE 10BK 5 108K 10 BLACK ap LORD UNE NER m LINE VOLTAGE 188K 9 188K GRYL GR YL 10GR YL 11 10 GRYL 18 GRYYL YL 10 GRIYL 188K 188K 10 e NOTE FOR 31056 ONLY 5 CONTROL MAIN LINE MODEL 605 FREAS OVEN 115V B CHASSIS CHASSIS 1 5 GROUND RTot GROUND GROUND THIS RED LEAD MUST BE COVERED MARKED WITH WHITE HEAT SHRINK TUBING 4 2 1 9 s 3 1 PNQ03365075 3151 WITH THE WIRE LEAD IS COVERED 4 12 PIN 00336502 230V proud FOR A MINIMUM OF 10 INCHES T es SHRINK L FROM THIS END OF RED WIRE LEAD 5 3 t8RD 12 6 1 TUBING ACCESS PANEL GROUND UL REQ D 711718 188R 8I lt 18BK 1 w N RTD1 Lui 18WH 2 TN TEMP SENSOR PIN 00705502 19 188 3 TN A1 TEMP CONTROLLER P N 323057 42 2 CONTROL CHASSIS CHART HEATER CHART CATALOG NO PART NO CATALOG NO HEATER FINAL MODEL No CONTROL PANEL vor TAGE FINAL MODEL PART NO VOLTAGE WATTS ASSEMBLY ASSEMBLY ASSEMBLY 31056 amp P 605 00715440 115V 310564 P 605 247321 115V 2200 31057 amp P 605 00715
19. THE OVENUNATTENDED Maintenance WARNING DISCONNECT OVEN FROM THE POWER SOURCE BEFORE PERFORMING ANY OF THE FOLLOWING STEPS Cleaning of Control Compartment Efficient and long life service of the oven depends on the physical condition of all the electrical components Heavy accumulation of dirt or dust on the microprocessor controller solid state relay timer switch circuit breaker switch and the motor could cause these components to operate at higher than normal temperatures and premature failures may result Therefore periodically vacuum blow dirt and dust off of these components Parts Replacement There are five major electrical parts or assemblies on each oven Blower Motor Heater Assembly Microprocessor Controller RTD Temperature Sensor High Limit Thermostat Blower Motor With Power switch On blower motor should be operating Open the oven door and air current from right to left can be felt within the chamber The blower motor is equipped with a built in thermal overload device to prevent it from overheating WARNING DISCONNECT OVEN FROM ITS ELECTRICAL POWER SOURCE To replace the motor itis first necessary to remove the heater a Remove outside left panel from oven b Remove wires from heater bus bars c Togainaccess to the heater remove left inner diffuser wall Remove heater mounting screws d Loosen set screw that locks blower wheel to shaft of motor and remove
20. WER OPERATES AT ALL TIMES WHEN THE POWER SWITCH IS ON Operation 1 For nominal ventilation open the exhaust vent and air intake vent shutter caps approximately 50 The air intake vent is to the left when facing the front of the oven 2 Set Air volume control to the midposition 3 the High Limit control fully clockwise 4 Turn the Timed knob to the Hold position for continuous operation at a desired temperature setting If a controlled time period up to 12 hours is required rotate the knob to the desired hourly increment NOTE IF THE TIMER KNOB IS AT THE ZERO POSITION THE HEATER WILL NOT OPERATE 5 Pressthe Power switch to the On position and observe operation 6 Depress the appropriate UP or DOWN button until the desired setpoint temperature is displayed in the lower display 7 the temperature Pressthe SET key once The right digit will flash Select a value for this digit by pressing the or V key until the value is displayed Pressthe key to selectthe next digit to be changed Use the or V key until the desired value is displayed Once the readoutis displaying the desired temperature setpoint press the SET key to enter the value into the controller 8 Allow the chamber to stabilize at the select SP temperature which can be observed on the upper display Time to reach maximum rated temperature 325 is approximately 60 minutes 9 Se
21. alue of the number highlighted 5 Present Value PV is the actual chamber temperature 6 Set value SV is the Temperature Set Value Display setpoint or desired temperature 7 First control output OUT 1 lamp lights up when control output heat is turned ON 8 Not Used 9 Not Used 10 Not Used 11 Not Used Timed Heat It is a 12 hour spring wound timer with a HOLD feature It turns off the heater after preset time of the timer has elapsed but the blower motor stays energized and continues to circulate air through the chamber During normal continuous operation of the oven at a desired temperature the timer knob should be turned to HOLD position counterclockwise 27 D oc 3 A Ya 9 RK kex C400 99 99 994 Air Volume Control It is a mechanical setting and controls the amount of heated air entering the working chamber The reference dialis numbered 1 through 9 The setting is made by turning the knob slightly counterclockwise sliding itto a desired position on the scale and locking it by turning clockwise Although the scale is numbered linearly the air volume increase is not linear The air volume increases are relatively small at the lower end of the scale and large when adjusted at the upper end The one setting on the scale provides the minimum airflow and a setting of nine will supply the maximum airflow NOTE THE AIR BLO
22. he SET key to lock the value in Turn the power OFF and back on to escape the setup routine Loading Mechanicalconvection ovens dependon forced air circulation therefore general loading procedures are applicable and must be followed insure that the circulation of heated air is not restricted in the chamber 1 At least 1 should be left between objects placed on the shelves NOTE IN MECHANICAL CONVECTION OVENS OBJECTS SHOULD NOT BE PLACED ON SHELVES INSUCHA MANNER AS TO BLOCK THE MOVEMENT OF HEATED AIR INTO THE CHAMBER FROM THE SIDE DIFFUSER PANEL 2 Thebottom of the chamber must be kept free and clear of objects 3 Atnotime should solid shelves be substituted for the shelves that are provided WARNING SAFETY PRECAUTIONS DO NOT PLACE ANY EXPLOSIVE COMBUSTIBLE OR FLAMMABLE MATERIALS IN THE CHAMBER DO NOT PLACE SEALED CONTAINERS IN THE CHAMBER SEALED CONTAINERS FILLED WITH MATERIALS DO NOT PROVIDE ROOM FOH EXPANSION AND CAN DEVELOP DANGEROUS VAPOR PRESSURE AS THE TEMPERATURE INCREASES AVOID SPILLAGE OF LIQUIDS DO NOT EVAPORATE NOXIOUS FUMES CAUTION DO NOT STORE CONTAINERS FILLED WITH ACIDIC OR CAUSTIC SOLUTIONS AS VAPORS FROM THESE MATERIALS WILL ATTACK THE CHAMBER INTERIOR AND ELECTRICAL COMPONENTS THUS VOIDING THE WARRANTY AVOID PLACING PLASTIC MATERIALS IN THE OVEN EXTREME TEMPERATURES MAY CAUSE PLASTICS TO MELT POSING A FIRE HAZARD IF PLASTICS ARE PLACED IN THE OVEN DO NOT LEAVE
23. k Points 1 Have proper connections been made at the junction box 2 Areall wire connections tight 3 service wires size adequate to carry the load 4 Is the oven properly grounded 5 ls the oven connected to a properly fused branch circuit Explanation of Controls Power Switch Controls all electrical power to the oven when energized The blower motor will always be in operation when the Power switch is On High Limit Control The function of this thermostat is to control the operation of the heater if either the microprocessor or RTD should fail During normal operation the control is set so that the pilot lamp above the control knob does not glow A glowing lamp indicates that the heater is not energized When the control knob is rotated to its maximum position fully clockwise the maximum chamber temperature will be limited to 345 Temperature Control TEMPERATURE Controller The microprocessor temperature controller provided contains two digital displays the upper display indicates chamber temperature in C and the lower display indicates the desired operating temperature in C 1 Set SET key is used to access the set values for Temperature Control 2 Setting digit shift left key moves to and highlights digit to be changed 3 Set value decrement key is used to decrease the value of the number highlighted 4 Set value increment key is used to increase the v
24. ly we guarantee our full support of your claim to be compensated for loss from concealed damage DO NOT FOR ANY REASON RETURN THIS UNIT WITHOUT FIRST OBTAINING AUTHORIZATION In any correspondence to Thermo please supply the nameplate data including catalog number and serial number General Information This instruction manual encompasses the following models and their specific electrical characteristics i Total 3166777 120 EN 2500 6050 6051 6052 6053 3166778 230 50 60 Maximum Rated Temp Blower Motor 6054 3166779 230 50 60 7 3700 6056 3166780 230 50 60 4800 These ovens utilize motor driven turbo blower to circulateheatedairthroughoutthe working chamber In operation air is drawn into the chamber through an intake port located at the left side of oven top passed over the heater bank where itis heated and forced into the working chamber through a perforated panel known as a diffuser wall located on the right hand side of the chamber The air then passes across the working chamber and out through a diffuser wall on the opposite side where it is again passed over the heater bank and recirculated During this continuous process a portion of the heated air is exhausted through a vent located at the top of the working chamber to eliminate moisture and fumes which may arise from the material in the oven The exhausted air is replaced by new air being drawn in through
25. ssembly face down being careful not to damage the controller protecting the front side is recommended i e bubble wrap i Disassemble the control panel housing by removing five screws two on top three on side Remove L shaped cover j Detach terminals noting their location see page 21 for proper connections k Remove the two sleeve mounting brackets located on top and bottom of the controller sleeve by unscrewing threaded shafts and pressing down on the bracket See FIG 1 l Slide controller forward through the front of the control panel m Reverse this procedure to replace controller 4 Temperature Sensor On all ovens the sensor is located in the working chamber close to the air exhaust vent Itis held in place by atubular speed clip at the sensor end The three leads terminate in a plug in connector To gain access to the connector remove the outside left panel Connector is located in the bottom leftcorner To separate the connector squeeze the housing ears and pull apart To test sensor see TROUBLESHOOTING section page 10 To replace the sensor it is also necessary to remove the rear panel For proper unit operation and calibration the sensor tip location is important Insert a new sensor to the proper depth see FIG 2 Then pack glass wool insulation against the area where the wire leads protrude from the rear wall Replace the rear and left outside panels Chamber Interior
26. the intake port Mechanical Convection Ovens provide the most efficient means of heat transfer as well as the most reproducible test conditions for successive operations They provide rapid heat up time for high density loads shortened recovery period in production operations where the door is frequently opened anda minimum difference in uniformity for extremely heat sensitive materials These ovens are microprocessor controlled The temperature range of the oven is ambient 15 C minimum to 325 C maximum These controllers cycle heat On Off in split second intervals based oninputfroma Platinum Resistance Temperature Device RTD sensor The controller displays temperature When this type of control is combined with the appropriate inner chamber design precise temperature control from ambient 15 to 325 C is achieved Another backup safety is a separate adjustable HIGHLIMIT control which turns the heater Off if the selected limit is attained A glowing red light will indicate this condition The timer located on the front panel is spring wound It will allow the heater to be turned Off after apresettime maximum of 12 hours orto continue to heat at the desired chamber temperature by turning the timer knob to the HOLD position The air continues to circulate within the chamber after the heater is turned Off as the blower motor is still operating Installation WARNING INSTALLATION SHOULD BE C
27. tisfactory the chamber was improperly loaded Redistribute the load High Limit Thermostat Ensure High Limit is set as outlined in the OPERATION section If the red pilot light is glowing at all times no matterthe position ofthe High Limit knob at ambienttemperature the High Limit is bad and should be replaced See PARTS REPLACEMENT Page 7 6 RTD Sensor If the display flashes C LI CJ Ll check the sensor for a short circuit If the display flashes LI LI LI LI check the sensor leads for loose connections or check the sensor for an open circuit Disconnect the RTD Sensor from terminals 15 and 16 at the rear of the microprocessor controller and compare the resistance of the sensor with the following chart Also check the resistance between the sensor sheath and either sensor lead it should be 100 megohms or greater The resistance values should be Sensor Temp C Resistance ohms 50 119 40 100 138 50 150 157 32 200 175 84 250 194 08 300 212 03 7 Solid State Relay With 3 5 to 26VDC between terminals 3 and 4 of the solid state relay when the microprocessor controller s OUT 1 LED is glowing this voltage should be present if not check microprocessor controller check for AC voltage between terminals 1 and 2 of the solid state relay it should be approximately 1 2 VAC Disconnect terminal 3 from the solid state relay and verify that the voltage between terminals
28. tthe High Limit thermostat by rotating the knob counterclockwise until the red pilot light turns On It indicates that the High Limit thermostat has taken control and that the heater has been de energized Once this occurs rotate the knob clockwise one division NOTE THIS ADJUSTMENT THE HIGH LIMIT THERMOSTAT SHOULD BE DONE ONLY WHEN THE CHAMBER TEMPERATURE IS STABILIZED AT THE DESIRED SETPOINT TEMPERATURE WARNING READ THE FOLLOWING SECTION 10 COMPLETELY BEFOREATTEMPTING TOPERFORM THE CALIBRATION PROCEDURE THIS PROCEDURE SHOULD BE PERFORMED QUALIFIED PERSONNEL FAILURE TO PERFORM THE CORRECT SEQUENCING AND OR INPUTTING MAY CAUSE A CHANGE ADVERSELY AFFECTING THE OPERATION OF THE UNIT 10 Calibration temperature offset Calibration offset is used to match the actual displayed temperature to a thermometer that has been placed in the chamber The difference between the reading on the display and the reading on the thermometer placed in the chamber is the OFFSET VALUE To calibrate OFFSET Press and hold the SET key for 5 seconds The display will show H Press the SET key until the display shows LLE Enter 0000 e Press the SET key e Simultaneously press and hold the SET and lt keys for 5 seconds The display will show Press the SET key until the display shows Pb Note the offset value displayed and add or subtract the difference Enter the new value and press t
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