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OPERATION & MAINTENANCE MANUAL
Blue M - - DC 146 Series Industrial Ovens, Models DC, DCW, DCI, DCC
INDUSTRIAL OVEN
DC 146 SERIES
MODEL No. DCxxx
S/N xxxxxxxxxx,
TEMPERATURE CONTROLLER
Blue M Stat 350
Blue M Pro 350
Blue M Pro 550
Blue M Pro 750
Watlow F4
2821 Old Route 15
New Columbia, PA 17856
570-538-7200
Fax: 570-538-7380
O/N xxxxx
Yokogawa UT350
Yokogawa UP350
Yokogawa UP550
Yokogawa UP750
BLUE M
Rev. 04/21/11
Page 1
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Table of Contents
Summary of Contents for TPS Blue M DC 146 Series
- Page 1 BLUE M INDUSTRIAL OVEN OPERATION & MAINTENANCE MANUAL DC 146 SERIES MODEL No. DCxxx S/N xxxxxxxxxx, O/N xxxxx TEMPERATURE CONTROLLER Blue M Stat 350 Yokogawa UT350 Blue M Pro 350 Yokogawa UP350 Blue M Pro 550 Yokogawa UP550 Blue M Pro 750 Yokogawa UP750 Watlow F4 2821 Old Route 15...
- Page 2 BLUE M THIS PAGE INTENTIONALLY LEFT BLANK Blue M - - DC 146 Series Industrial Ovens, Models DC, DCW, DCI, DCC Page 2...
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Page 3: Table Of Contents
BLUE M TABLE OF CONTENTS SECTION Page INFORMATION COMPANY INFORMATION & ASSISTANCE ____________________________________ 6 SAFETY WARNINGS & SYMBOLS ___________________________________________ 7,8 PRODUCT SPECIFICATIONS & OVERVIEW Application & Specifications _________________________________________________ 9 Conditioning Functions _____________________________________________________ 10 Equipment and Control Features _____________________________________________ 10-12 Operating Parameters and Requirements _______________________________________ 12 DRAWINGS, INFORMATION, and VENDOR INSTRUCTION LISTINGS ______________ 13 INSTALLATION INSTRUCTIONS Delivery and Uncrating of Unit ________________________________________________ 14... - Page 4 BLUE M SYSTEMS and CONTROL AIR CIRCULATION SYSTEM System Overview _________________________________________________________ 33-35 Basic Workspace Airflow Description __________________________________________ 36-38 Adjustment of Air Intake & Exhaust Dampers for Model DC / DCW ___________________ 39,40 6.3.1 One-Pass Airflow System ___________________________________________________ 41 6.3.2 Full Recirculated Airflow System ______________________________________________ 41 6.3.3 One-Pass &...
- Page 5 BLUE M OPTIONAL EQUIPMENT and FEATURES 13.0 PROCESS TIMER – EAGLE SIGNAL B856 (Optional) ___________________________ 57 14.0 24 HR / 7 DAY DIGITAL TIMER – GRASSLIN DIGI 20E (Optional) __________________ 58 15.0 24 HR / 7 DAY DIGITAL TIMER – GRASSLIN FM1D (Optional) ____________________ 59 16.0 DOOR LIMIT SWITCH OPERATION (Optional) _________________________________ 60 17.0...
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Page 6: Company Information & Assistance
Tenney Environmental - - - - Lunaire Environmental - - - - Gruenberg Oven - - - - Blue M - - - - Lindberg Parts and service inquiries for equipment within each division should be directed to TPS by any of the following methods. -
Page 7: Safety Warnings & Symbols
BLUE M SAFETY WARNINGS & SYMBOLS You must follow these and all Warning statements listed throughout the manual! Read this entire Operation Manual, as well as the vendor manuals and cut-sheets provided before operating this equipment! Failure to adhere to any Safety Warning, or failure to follow the proper operating procedures listed throughout any of the information provided, could cause damage to your equipment, personal injury, or death. - Page 8 BLUE M Do not overload the floor of the chamber workspace or load the unit unevenly. Do not exceed the temperature rating of your chamber. Human exposure to temperature extremes can cause injury. Do not open oven doors until oven temperature drops below 200°...
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Page 9: Product Specifications & Overview
BLUE M PRODUCT SPECIFICATIONS & OVERVIEW Application & Specifications This manual applies to the Blue M Model 146 Series Industrial Ovens, which are designed in three distinct types and in a wide range of sizes. They serve a very diverse number of process applications. An electric heating system is used with a high volume air circulation system to provide maximum temperature uniformity. -
Page 10: Conditioning Functions
BLUE M Conditioning Functions Heating of the oven is achieved by recirculating oven air through open air nichrome wire heater elements mounted in the conditioning plenum. The plenum is located beneath the chamber workspace and is isolated to prevent direct heat radiation. Cooling in the Model DC oven is achieved by adjusting dampers with the intake and exhaust ports, which are normally located on the left side of the oven. - Page 11 BLUE M Overtemperature Protection: A Yokogawa Model UT150L Limit Controller (OTP) is provided for overtemperature protection. The protection circuitry will shut down the heat control system and the circulation blower when a high heat limit is detected. Audible and / or visual alarms will be activated. Circulation Airflow Switches: A differential air pressure switch is used to monitor the generation of airflow by the circulation blower.
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Page 12: Operating Parameters And Requirements
Operators and service personnel must be familiar with the location and function of all controls and the inherent dangers of the equipment before operating or maintaining it. TPS shall not be liable for any damages, including incidental and/or consequential damages, regardless of the legal theory asserted, including negligence and/or strict liability. -
Page 13: Drawings, Information, And Vendor Instruction Listings
BLUE M DRAWINGS, INFORMATION, and VENDOR INSTRUCTION LISTINGS The following drawings are provided: Electrical Schematic xxxxxWD Wiring Parts List xxxxxPW General Layout (for custom ovens - when available) D001 The following information and vendor manuals are provided: Main Temperature Controller Manual Yokogawa UT150L Limit Controller Manual Optional Equipment –... -
Page 14: Installation Instructions
BLUE M INSTALLATION INSTRUCTIONS Read this section completely before attempting to install, or operate the equipment. Delivery and Uncrating of Unit Inspect equipment and shipping crate immediately upon receipt. If any damage is apparent, you should discuss it with the trucking delivery person and contact the transportation company immediately. Make notes of any damage on the Bill Of Lading. -
Page 15: Equipment Access & Features
BLUE M Equipment Access & Features 5.3.1 Models DC & DCW Models DC & DCW Exhaust Port Door Switch Intake Port Differential Air Main Circuit Pressure Switch Breaker Adjustment Port MODEL DC206 Thermocouple Ports Access Port Air Press. Sense Port Power Supply Machinery Junction Box... - Page 16 BLUE M Models DC & DCW Access Port Door Switch Main Circuit Breaker MODEL DC1406 Model DCW ovens incorporate a fully welded and sealed liner. This means that all port joints are welded around the entire perimeter. Note Weld 360° Around Port ACCESS PORT Blue M - - DC 146 Series Industrial Ovens, Models DC, DCW, DCI, DCC Page 16...
- Page 17 BLUE M Models DC & DCW Chart Recorder Exhaust Port Thermocouple Ports Intake Port Air Pressure Sense Port Power Supply Junction Box Differential Air Pressure Switch Adjustment Port Machinery Compartment - Panel Removed MODEL DC1406 - REAR Blue M - - DC 146 Series Industrial Ovens, Models DC, DCW, DCI, DCC Page 17...
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Page 18: Model Dci
BLUE M 5.3.2 Model DCI Model DCI Chamber Pressure Relief Valve Inert Gas Control System & Supply Connection Differential Air Pressure Switch Adjustment Port MODEL DCI256 Door Switch Cooling Coil Water Supply Connection Oven Mounted on Stand Access Door MODEL DCI256 with STAND Blue M - - DC 146 Series Industrial Ovens, Models DC, DCW, DCI, DCC Page 18... - Page 19 BLUE M Model DCI Chamber Pressure Thermocouple Relief Valve Ports Inert Gas Control System & Supply Connection - - Cover Removed Cooling Coil Water Air Press. Supply Connection Sense Ports Chart Recorder Light Tower Power Supply Mach. Compartment - Junction Box Panel Removed Oven Stand MODEL DCI256 - REAR with STAND...
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Page 20: Model Dcc
BLUE M 5.3.3 Model DCC Model DCC Inert Gas Supply Flowmeter Oven Mounted on Stand T/C Ports Access Door MODEL DCC206 with STAND Air Press. Sense Ports Cooling Coil Water Supply Connection Power Supply Junction Box Diff. Air Press. Adjust. Port Inert Gas Supply Connection... -
Page 21: Exhaust Connection (Models Dc & Dcw)
BLUE M Exhaust Connection (Models DC & DCW) An exhaust port with a quad damper is installed on the left side of the Model DC oven. Exhaust port sizes range from 3” to 8” O.D., depending on oven size. An optional motorized damper actuator may be provided. For applications requiring protection from contacting hot surfaces of the oven exterior (U.L.), a wire mesh exhaust guard is installed around the exhaust port. -
Page 22: Water Supply Connections (For Cooling Coil - As Applicable)
BLUE M Water Supply Connections (for Cooling Coil - as applicable): Your oven will require a supply of city water for the water-cooled cooling coil, which is installed for the applications below. Optional for Model DC / DCW Standard for Models DCI and DCC The supply should be rated 3 - 4 GPM, 30 to 40 PSIG, at 75°... -
Page 23: Inert Gas Supply Connection For Model Dci
BLUE M Inert Gas Supply Connection for Model DCI An inert gas supply is required for process operation of the Model DCI. The selection of the approved gases listed below is primarily dependant upon compatibility with the materials being processed. Warning! This oven is designed for use with only the non-explosive, non-flammable, inert gases listed below. - Page 24 BLUE M Do not connect oven directly to a compressed gas cylinder or any other high pressure gas source. Use only commercially prepared and bottled gases. Do not exceed 70 PSIG gas inlet pressure. Important! Refer to the Inert Gas Control System section for information on setting the flow rates for your chamber.
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Page 25: Inert Gas Supply Connection For Model Dcc
BLUE M Inert Gas Supply Connection for Model DCC An inert gas supply is required for process operation of the Model DCC. The selection of the approved gases listed below is primarily dependant upon compatibility with the materials being processed. Warning! This oven is designed for use with only the non-explosive, non-flammable, inert gases listed below. - Page 26 BLUE M You must adhere to the following warnings! Warning! Suffocation hazard. The oven must be located in a well ventilated area. Although inert gases are not in themselves toxic, they can displace sufficient oxygen in poorly ventilated rooms to cause suffocation or asphyxiation. Warning! Burn Hazard.
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Page 27: Chamber Venting For Models Dci & Dcc
BLUE M Chamber Venting for Models DCI & DCC An inert atmosphere is maintained in the Model DCI and Model DCC ovens during the process cycle using an injected inert gas. Warning! Inert gases displace oxygen. A vent duct should be connected to the relief valve or vent port and run to a location outside of the building. -
Page 28: Compressed Air Supply Connection For Pneumatic Door Lock (Optional)
BLUE M Compressed Air Supply Connection for Pneumatic Door Lock (Optional) A compressed air supply is required for operation of the pneumatic door lock system. The supply should be clean and dry and rated 25 to 40 PSIG maximum. The connection is made to a port located at the rear of the oven and is Type 1/4”... -
Page 29: Power Supply Specifications And Connection
Otherwise, erratic operation and damage may occur to your equipment, which may void your warranty. If you have any questions, please call the TPS Service Department. Important! One of the most common causes of equipment malfunction is low line voltage as the power source to the unit. - Page 30 BLUE M Making the Power Supply Connection to the Chamber: A main power disconnect switch is normally not provided with your chamber. We recommend that a fused disconnect switch on a separate branch circuit be installed as the power source to your chamber, in accordance with all national and local electrical codes.
- Page 31 BLUE M Model DC336 Power Supply Control Panel Diff. Air Junction Box Assembly Heater Connections Press. Sw. Circ. Motor Heater Power SSRs Main Circuit Breaker MACHINERY SECTION – MODEL DC336 Model DCC206 Power Supply Diff. Air Control Panel Junction Box Press.
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Page 32: Application Of Power
BLUE M 5.11 Application of Power Before energizing any equipment, make a visual inspection for loose components, electrical connections, fittings, etc. Shut all operating switches to the “OFF” position before energizing. Have trained personnel start and check out the equipment before its first cycle. Motor Rotation Check: Units with three phase motors must be checked to insure proper motor rotation. -
Page 33: Air Circulation System
BLUE M AIR CIRCULATION SYSTEM System Overview A high volume horizontal type airflow system is employed with an electrical heating system to provide maximum temperature uniformity. Heating and the generation of airflow occurs in the conditioning plenum located below the workspace floor. The plenum is isolated from the workspace to prevent direct heat radiation. - Page 34 BLUE M Model DCC336 Air Diffuser Thermocouple Ports Water-Cooled Coil Diff. Air Press. Sense Tubes Discharge Air Inert Gas Port Below Wheel Blower Wheel Heaters CONDITIONING PLENUM – MODEL DCC336 Model DC256 Exhaust Port Air Diffuser Air Intake Damper Access Port in Closed Position Diff.
- Page 35 BLUE M Model DCC256 Differential Air Pressure Sense Tubes Blower Discharge MODEL DCC256 BLOWER DISCHARGE Models DC & DCI Thermocouples Rear Wall THERMOCOUPLE LOCATION – MODELS DC & DCI Model DCC Thermocouples Note: Thermocouples are placed along the left wall in the Model DCC only, due to the Clean Room Insert that is installed...
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Page 36: Basic Workspace Airflow Description
BLUE M Basic Workspace Airflow Description Process air is drawn down into the conditioning plenum from along the left side duct wall by the circulation blower wheel. For Models DC / DCW, this air will mix with fresh ambient intake air when the intake damper is opened. - Page 37 BLUE M Model DC336 Thermocouples Access Port WORKSPACE AIRFLOW – MODEL DC336 Blue M - - DC 146 Series Industrial Ovens, Models DC, DCW, DCI, DCC Page 37...
- Page 38 BLUE M Model DC206 Thermocouples Access Port WORKSPACE AIRFLOW – MODEL DC206 Differential Air Pressure Switches (FLS): A differential air pressure type switch is utilized to monitor for correct operation of the circulation blower motor. Correct rotation of the motor is necessary for the switch to properly operate. This device uses a diaphragm to sense pressure and to mechanically trigger a SPDT Snap Switch when the correct pressure is developed across the blower wheel.
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Page 39: Adjustment Of Air Intake & Exhaust Dampers For Model Dc / Dcw
BLUE M Adjustment of Air Intake & Exhaust Dampers for Model DC / DCW Adjustable air intake and exhaust dampers permit the air circulation system to be operated between a one- pass airflow system and a full recirculated airflow system. Both dampers should be slightly opened for the following conditions. - Page 40 BLUE M Standard Air Exhaust Damper: The exhaust damper includes a lever attached to the damper shaft. You must loosen the wingnut on the shaft assembly to open and close the butterfly damper. An indented “Open” to “Shut” scale is marked with graduated lines on the assembly.
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Page 41: One-Pass Airflow System
BLUE M 6.3.1 One-Pass Airflow System To operate with a One-Pass Airflow System, the air intake and exhaust dampers must be fully opened. When the intake damper is fully opened, it will totally close off the recirculation path to the conditioning plenum from the left duct wall. -
Page 42: Adjustment Of Astm Air Intake & Exhaust Dampers
BLUE M 6.3.4 Adjustment of ASTM Air Intake & Exhaust Dampers For applications that require special temperature uniformity requirements according to ASTM specifications, special air intake and exhaust dampers are employed. ASTM Intake Damper: The ASTM air intake damper is provided with a cover that can only be positioned either fully open or fully closed. -
Page 43: Airflow Description For Models Dci And Dcc
BLUE M Airflow Description for Models DCI and DCC In the Model DCI and DCC ovens, inert gas is injected into the conditioning plenum below the inlet of the blower wheel. The gas mixes with circulating process air and is forced through the heaters and the water- cooled cooling coil, and is discharged up into the right side duct wall. -
Page 44: Hepa & Ulpa Filtration For Model Dcc
BLUE M HEPA & ULPA Filtration for Model DCC Either HEPA filtration or ULPA filtration is employed in the Model DCC to maintain clean room specifications. The filter is installed behind the right side duct wall. Discharge air from the conditioning plenum enters the filter before flowing out into the workspace. - Page 45 BLUE M Model DCC1406 Screen & Shelf Slides Installed INSERT with HEPA INSTALLED – INSIDE VIEW MODEL DCC1406 CLEAN ROOM INSERT REMOVED with HEPA INSTALLED Model DCC336 Screen & Shelf Slides Installed MODEL DCC336 with HEPA FILTER DCC336 with SCREEN / SHELF HOLDER Blue M - - DC 146 Series Industrial Ovens, Models DC, DCW, DCI, DCC Page 45...
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Page 46: Inert Gas Control Systems
BLUE M INERT GAS CONTROL SYSTEMS Model DCI Gas Control System An inert gas sytem is used to maintain an inert atmosphere in the oven at a slight positive pressure during the entire process cycle. The oven is initially purged of atmospheric air for a specific time period before heating is allowed to begin. - Page 47 BLUE M The Eagle Signal Model B866-511 Purge Timer is used to time the purge cycle. This timer is installed inside the control panel. After product is loaded, the oven door is securely closed, and the chamber is started, the timer will immediately energize and open the Gas Purge solenoid valve to start the purge.
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Page 48: Model Dcc Gas Control System
BLUE M Model DCC Gas Control System An inert gas sytem is used to maintain an inert gas atmosphere in the oven during the entire process cycle. The Model DCC does not incorporate a separate Purge Cycle and Run Cycle as in the Model DCI. Therefore, the pressure relief valve, pressure gage, and purge timer are not employed. -
Page 49: Oxygen Analyzer / Transmitter (Optional)
BLUE M OXYGEN ANALYZER / TRANSMITTER (Optional) Overview When an inert gas atmosphere is employed (Model DCI & DCC), it may be necessary to monitor the amount of oxygen present in the chamber atmosphere for safety or process control reasons. In an alarm condition, the heating system would be shut down and audible /visual alarms will be activated. -
Page 50: Series 2000 /2510 Percent Oxygen Units
BLUE M Series 2000 /2510 Percent Oxygen Units The Alpha Omega Series 2000 / 2510 units measure oxygen as a percent of the atmosphere volume with the following specifications: Measurement Ranges in percent: 0-2, 0-5, 0-10, 0-25, 0-50, 0-100 (specified at time of order) Sample Gas pressure Limits: 0.1 to 1.0 PSIG Sample Flow Rate:... -
Page 51: Electric Heating System & Control
BLUE M ELECTRIC HEATING SYSTEM & CONTROL Overview: Heating of the oven is achieved by recirculating oven air through open-air heavy gauge nichrome wire heater elements mounted in the conditioning plenum. Each element is configured in a serpentine pattern within a cylindrical stack and supported by ceramic disks. -
Page 52: Cooling Systems & Control
BLUE M 10.0 COOLING SYSTEMS & CONTROL 10.1 Cooling with Ambient Air – Model DC / DCW Cooling in Models DC and DCW can be achieved by opening the air intake and exhaust dampers with the heating system turned off. Fresh ambient air will mix with circulating process air to cool the product. With both dampers fully open and the heating system turned off, the oven can be cooled from your process operating temperature to around 15°... -
Page 53: Temperature Controllers
BLUE M 11.0 TEMPERATURE CONTROLLERS 11.1 Temperature Control Several different non-profiling and profiling type temperature controllers may be used to control oven temperature. Non-profiling type controllers are standard. Heating and cooling (when applicable) control methods are basically the same for each controller class. Heating of the oven is controlled using a time proportioned output of the controller, which will trigger one or more Solid State Relays (SSR1 / SSR2 / SSR3) to conduct and provide power to each heater stack (bank) employed. -
Page 54: Profiling Type Controllers - Optional
BLUE M 11.3 Profiling Type Controllers - Optional Blue M PRO-350 Controller: (or Yokogawa UP350) The Blue M Model PRO-350 Controller is a profiling type, 1/4 DIN controller with the following main features. Please note that all features may not be used. Single Channel Program Capacity: 2 Profiles, 10 Segments per Profile Automatic / Manual Control... - Page 55 BLUE M Blue M PRO-750 Controller: (or Yokogawa UP750) The Blue M PRO-750 Controller is a profiling type, 1/4 DIN controller with the following main features. Please note that all features may not be used. Two Channel Program Capacity: 300 Profiles, 99 Segments per Profile, Maximum of 3,000 Segments Program and Local (Single Setpoint) Control 1 Process Input: Type J Thermocouple...
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Page 56: Overtemperature Protection
Important! The configuration set-up is mainly provided for your reference. Not all of the parameters shown apply to your chamber. Changes to some of the set-up parameters may drastically affect your chamber performance and void your warranty. Contact the TPS Service Dept. before attempting any changes. -
Page 57: Process Timer - Eagle Signal B856 (Optional)
BLUE M 13.0 PROCESS TIMER – EAGLE SIGNAL B856 (Optional) An Eagle Signal Model B856 Digital Process Timer may be provided to time your process cycle and to stop conditioning when the cycle is complete. The Model B856 is a programmable 1/16 DIN type timer that features five selectable standard timing operations, with five selectable time ranges. -
Page 58: 7 Day Digital Timer - Grasslin Digi 20E (Optional)
BLUE M 14.0 24 HR / 7 DAY DIGITAL TIMER – GRASSLIN DIGI 20E (Optional) IMPORTANT NOTE: The Model Digi 20E is being replaced by the Grasslin Model FM1D. The Grasslin Model Digi 20E 24 Hour / 7 Day Digital Timer may be provided to start and stop 24 hour / 7 day oven operation. -
Page 59: 7 Day Digital Timer - Grasslin Fm1D (Optional)
BLUE M 15.0 24 HR / 7 DAY DIGITAL TIMER – GRASSLIN FM1D (Optional) The Intermatic / Grasslin Model FM1D 24 Hour / 7 Day Digital Timer may be provided to start and stop 24 hour / 7 day oven operation. This timer enables the oven to shut off at night and turn on and ramp back to temperature before the work day starts. -
Page 60: Door Limit Switch Operation (Optional)
BLUE M 16.0 DOOR LIMIT SWITCH OPERATION (Optional) A Door Limit Switch (LS) may be installed to detect for proper closure of the oven door. The switch acts as a digital input to the main controller and must be activated in order to start a heat process cycle. If the door is inadvertently opened during the process cycle, it will cause the heating system to shut down and the circulation blower to turn off. -
Page 61: Pneumatic Door Lock Operation
BLUE M 18.0 PNEUMATIC DOOR LOCK OPERATION (Optional) A Pneumatic Door Lock may be provided to prevent the oven door from being opened after the process cycle has begun. An Event Output from a profiling type controller is used to lock the door with the start of the process. -
Page 62: Chart Recorder (Optional)
BLUE M 20.0 CHART RECORDER (Optional) As an option, your chamber may be provided with either a circular or strip type chart recorder to record temperature versus time. This recorder is normally a one pen type, which also digitally displays the measured value. -
Page 63: Sequence Of Operation
BLUE M 21.0 SEQUENCE OF OPERATION WARNING! This equipment is not designed for use with volatile or explosive materials unless it is equipped with a solvent venting package or intrinsically safe interior design, and specifically stated in your chamber specifications. Loading of such materials may result in explosion or fire. Important! Make sure you have read (and understand) this entire manual along with all vendor manuals enclosed before beginning oven operation. - Page 64 BLUE M For the Model DCI only, the following sequence will occur for the control of inert gas into the oven. The Eagle Signal B866-511 Purge Timer will energize and start the oven purge cycle. The heating system is disabled. The Purge light will illuminate. Adjust the Purge Flow Adjustment needle valve on the gas flowmeter according to the Purge Flow Rate in the Gas Flow Rate Table of Section 7.1 for your oven.
- Page 65 BLUE M CONTROL PANELS: PROCESS TIMER PANEL DC1406 with STAT-350 CONTROLLER DCI336 with PRO-550 CONTROLLER Blue M - - DC 146 Series Industrial Ovens, Models DC, DCW, DCI, DCC Page 65...
- Page 66 BLUE M SLIDE TRAYS: Circ. Motor Heater SSRs MODEL DCC336 – WF4 SLIDE TRAY Eagle 866- 511 Timer Heater SSRs MODEL DCI256 – PRO-550 SLIDE TRAY Blue M - - DC 146 Series Industrial Ovens, Models DC, DCW, DCI, DCC Page 66...
- Page 67 BLUE M Heater SSRs MODEL DC206 – STAT350 SLIDE TRAY Blue M - - DC 146 Series Industrial Ovens, Models DC, DCW, DCI, DCC Page 67...
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Page 68: Preventative Maintenance
BLUE M 22.0 PREVENTATIVE MAINTENANCE & SERVICE Warning! Only qualified maintenance and electrical personnel should be allowed to perform any maintenance or repair work. Warning! Turn the main power disconnect switch on the front of the oven to the OFF position and proceed with your company’s Lock-Out / Tag-Out procedure before servicing or cleaning. - Page 69 BLUE M Motors / Motor Shaft Seals: Remove All Power From Chamber! Note: The motors are permanently sealed ball bearing types and require no lubrication. Check motor shaft seals for deterioration. Inspection Period: 6 Months General Electrical Connections: Remove All Power From Chamber! Inspect inside the control panel and the machinery compartment for loose electrical connections, frayed wires, loose components, or other potential problems.
- Page 70 BLUE M Main Controller Calibration: The main temperature controller should be checked for temperature indicating accuracy, and for the proper activation of limit or alarm outputs (when provided). Please reference the controller user manual for more information. Inspection Period: 1 Year Limit Controller Alarm Circuitry: The Temperature Limit Controller should be checked for indicating accuracy and for proper activation of limit or alarm outputs.
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Page 71: Preventative Maintenance Schedule / Log
BLUE M 22.2 Preventative Maintenance Schedule / Log Important: For each of the items to be inspected, refer to item description sections for details on maintenance and service. PREVENTATIVE MAINTENANCE SCHEDULE / LOG Inspection Period Actual Date Actual Date Actual Date Actual Date ITEM TO BE Inspected /... - Page 72 BLUE M SUPPLEMENTAL INSTRUCTIONS Blue M - - DC 146 Series Industrial Ovens, Models DC, DCW, DCI, DCC Page 72...
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