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Cascade Sciences CVO-5-EX Series Installation & Operation Manual

Flammable solvent ovens
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Flammable Solvent Ovens
CVO-5-EX Oven Series
Installation - Operation Manual

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Summary of Contents for Cascade Sciences CVO-5-EX Series

  • Page 1 Flammable Solvent Ovens CVO-5-EX Oven Series Installation - Operation Manual...
  • Page 2 Depicted on the front cover: CVO-5-EX-SS User Manual Limitation This manual is designed to provide general information as it relates to the safe operation and understanding of the vacuum oven. It does not cover all possible applications and use. Cascade Sciences will not be held liable or responsible for damages resulting from the use of this manual or the vacuum oven.
  • Page 3 Revision: April 5, 2022 Item and Part ID Numbers The “M Part ID” denotes the build type of the model. Cascade Sciences periodically releases new build types of these models incorporating new features and refinements of existing ones. 115 Volt Hardwire Units...

  • Page 4: Table Of Contents

    TABLE OF CONTENTS SAFETY CERTS AND STATEMENTS....................8 Ex Hazardous Location Certification ....................8 Electromechanical and Heating Safety ....................9 CE Compliant ..........................10 UKCA Compliant ..........................10 ISO Certified Manufacturer ......................10 California Proposition 65 Statement ....................10 UNIT SPECIFICATIONS ......................12 Temperature Performance ......................
  • Page 5 Install the Shelving ........................58 Vacuum Supply Installation ......................59 Connect the Purge and Pressurize Gas Supply ................. 62 Optional Backfill Gas Supply ......................63 Hardwire to Power Supply ......................64 GRAPHIC SYMBOLS ........................66 CONTROL OVERVIEW .......................68 OPERATIONAL SAFETY ......................74 Operator Responsibilities........................
  • Page 6 Special Conditions Of Use ......................131 P a g e cascadesciences.com Tel. 503 847-9047...
  • Page 7 TABLE OF CONTENTS P a g e cascadesciences.com Tel. 503 847-9047...

  • Page 8: Safety Certs And Statements

    SAFETY CERTS AND STATEMENTS AZARDOUS OCATION ERTIFICATION Explosive Atmospheres: These ovens have been tested and certified by Intertek as meeting relevant IEC 60079 Ex equipment safety directives with UL, CSA, and ATEX national and group differences. These compliances cover operating in Zone 2, Class 1 Zone 2, and Class 1 Division 2 hazardous locations.

  • Page 9: Electromechanical And Heating Safety

    SAFETY CERTS AND STATEMENTS Continued from previous page Conforms to Hazardous Location Equipment Standards UL STD 600079-0, 60079-2, 60079-11, 60079-18 (USA) EN STD 600079-0, 60079-2, 60079-11, 60079-18 (EU and Great Britain) IEC STD 600079-0, 60079-2, 60079-11, 60079-18 (International Electrotechnical Commission) Certified to Hazardous Location Equipment Standards CSA-C22.2 No.

  • Page 10: Ce Compliant

    OMPLIANT These unit models meet all required Electromagnetic Compatibility (EMC), low-voltage, and RoHS safety directives. ISO C ERTIFIED ANUFACTURER These models are manufactured for Cascade Sciences by Sheldon Manufacturing, INC, an ISO-certified manufacturer. 65 S ALIFORNIA ROPOSITION TATEMENT For US compliance only.
  • Page 11 SAFETY CERTS AND STATEMENTS 11 | P a g e cascadesciences.com Tel. 503 847-9047...

  • Page 12: Unit Specifications

    UNIT SPECIFICATIONS Please refer to the oven data plate to confirm the electrical specifications for your unit. Technical data specified applies to units with standard equipment at an ambient temperature of 25°C ±3° (77°F ±5.4°) and at nominal voltage. The temperatures specified are determined in accordance with factory standards respecting the recommended wall clearances of 10% of the height, width, and depth of the inner chamber.

  • Page 13: Weight

    SPECIFICATIONS Heat Up Time from Ambient (77°F / 25°C) Ambient to stabilization with the chamber under vacuum. Heat up times may be influenced by ambient conditions. Model To 104°F (40°C) To 248°F (120°C) To 392°F (200°C) All Units 60 Minutes 120 Minutes 180 Minutes Cool Down Times...

  • Page 14: Capacity

    SPECIFICATIONS APACITY Model Cubic Feet Liters All Units 127.4 HELF APACITY BY EIGHT Model Per Shelf Total All Units 50.0 lb / 22.7 kg 225.0 lb / 102.0 kg OWER Power Cord Models Model AC Voltage Amperage Frequency Phase CVO-5-EX-SS 50/60 Hz CVO-5-EX-2-SS 50/60 Hz...

  • Page 15: Unit Dimension Drawings

    SPECIFICATIONS IMENSION RAWINGS Depth: 39.1 inches (993 Total Height: 34.4 inches (874 Exterior Dimensions Width: 29.3 inches (744 Depth: 24.0 inches (611 mm) Width: 18.1 inches (460 mm) Chamber Interior Height: 18.1 inches (460 mm) Cutaway Side View 15 | P a g e cascadesciences.com Tel.
  • Page 16 SPECIFICATIONS Ovens with the Optional Side Valve See the previous page for internal dimensions. Exterior Dimensions Depth: 42.4 inches (1077 mm) Total Height: 34.4 inches (874 mm) Width: 33.3 inches (846 16 | P a g e cascadesciences.com Tel. 503 847-9047...
  • Page 17 SPECIFICATIONS 17 | P a g e cascadesciences.com Tel. 503 847-9047...

  • Page 18: Introduction

    INTRODUCTION ANUAL Read the Entire Manual Failure to follow the guidelines and instructions in this user manual may create a protection impairment by disabling or interfering with the unit safety features. This can result in injury or death. Before using the unit, read the manual in its entirety to understand how to install, operate, •...
  • Page 19 using n-butane, propane, and other flammable solvents falling within the approved hazardous material categories listed in this manual. These gases or vapors must be safely exhausted from the workspace environment after being pumped out through the vacuum pump connected to the oven. 19 | P a g e cascadesciences.com...

  • Page 20: Intended Uses And Locations

    INTRODUCTION NTENDED SES AND OCATIONS These flammable solvent ovens are engineered for drying, curing, extraction, and baking applications under vacuum. It is designed for use in the specified hazardous location zones, with specified hazardous materials groups, and within specific internal operating and ambient temperature ranges.

  • Page 21: Hazardous Zones Map

    INTRODUCTION AZARDOUS ONES Zone 1: Explosive concentrations of gases or vapors are frequently present during normal operations inside the Zone 1 spaces of the oven chamber, KF-25 fitting, and vacuum system. Zone 2: Any explosive concentrations of gases or vapors in the Zone 2 space surrounding the oven, its KF-25 fitting, and the vacuum system are unintentional, infrequent, and short-lived –...
  • Page 22 22 | P a g e cascadesciences.com Tel. 503 847-9047...

  • Page 23: Allowed Locations, Materials, And Temperatures

    INTRODUCTION LLOWED OCATIONS ATERIALS EMPERATURES Prior to purchasing or installing one of these ovens, verify which hazardous location compliances are required by the safety authority having jurisdiction in your area for explosive atmospheres hazards. Hazardous Location Types The oven is not a complete solution for explosive atmosphere hazards but intended for use in a workspace configured to mitigate these hazards.
  • Page 24 These groups include propane and n-butane. 24 | P a g e cascadesciences.com Tel. 503 847-9047...
  • Page 25 INTRODUCTION Temperature Class • The oven is IECEx 60079 temperature class 2 equipment (T2), including under UL, CSA, and ATEX Differences. • The oven is also UL Class 1 Division 2 temperature class 2 equipment (T2). These classifications allow a maximum internal surface temperature of no more than 300°C (572°F).

  • Page 26: Hazardous Location Considerations

    INTRODUCTION AZARDOUS OCATION ONSIDERATIONS Note: Detailed requirements for these considerations are found in the Installation chapter of this manual. This section is intended as an overview only. Safe operation of the oven is not only dependent on operator behavior and the protection systems of the oven but on establishing safe environmental conditions at your site.
  • Page 27 INTRODUCTION Spark Elimination The workspace location must be configured and properly equipped to eliminate the potential for mechanical or electrical sparking in compliance with your fire or other safety jurisdiction standards. Power outlets for the oven and its vacuum pump to plug into must be located outside of the workspace hazardous (classified) location to preclude the potential for sparking in the presence of any explosive concentrations of gases or vapors.

  • Page 28: Explosion Prevention Systems Overview

    INTRODUCTION XPLOSION REVENTION YSTEMS VERVIEW The oven incorporates features designed to reduce the potential for the ignition of flammable or combustible gases in the previously specified hazardous location types. These systems do not eliminate the risk and do not reduce the requirements for operators competent to work in hazardous locations or adherence to hazardous location standards or directives.
  • Page 29 Continued next page 29 | P a g e cascadesciences.com Tel. 503 847-9047...
  • Page 30 INTRODUCTION Oven Systems Continued OTL System: The oven comes with an over-temperature limit heating cutoff system. • This is an independent mechanical heating cutoff system set to a heating cutoff temperature by the oven operator. The system diverts power from the heating elements in the event of an over-temperature event.

  • Page 31: Service Requirements

    INTRODUCTION ERVICE EQUIREMENTS For repairs, overhauls, scheduled preventative maintenance, and other service-level procedures. IEC Ex Certified Service Facility Required The oven must be serviced by an IEC Ex-certified facility or by IEC Ex-certified technicians from such a facility deemed competent to work with the explosion protection types used in this oven (Ex ia, pzc, mc).

  • Page 32: Service Documentation Requirements

    INTRODUCTION ERVICE OCUMENTATION EQUIREMENTS Per IEC 60079-19 4.3.2, the oven owner must maintain documentation for each IEC Ex safety marked oven listing the repairs, overhauls, and any modifications or other services conducted on it. Documentation must be maintained for the duration of the oven’s operating life. Oven Operator Access: Oven operators must have access to this documentation file or •...

  • Page 33: Vacuum Supply Required

    In order to function, the oven requires either a vacuum pump or a connection to a building vacuum system. Please contact Cascade Sciences for details on the appropriate vacuum pumps and vacuum system accessories suitable for your application. Vacuum pumps with explosion-proof motors are available.

  • Page 34: Purge Gas System Requirements

    INTRODUCTION URGE YSTEM EQUIREMENTS Oven Purge and Pressurize System Function A safe gas supply is required to purge and over-pressurize the oven electronics and heating elements safety enclosures before the oven can be turned on. The compressed gas may be: Air of instrument quality •...
  • Page 35 INTRODUCTION Air Compressor Requirements An air compressor system supplying compressed clean air for purging and pressurizing or backfilling must meet the following requirements in addition to those previously listed: • The air intake for the compressor must be located outside of the hazardous location, area, or zone.

  • Page 36: Gasket Chemical Vulnerabilities

    NGINEERING MPROVEMENTS Cascade Sciences continually improves its products. As a result, engineering changes and improvements are made from time to time. Therefore, some changes, modifications, and improvements may not be covered in this manual. If your unit’s operating characteristics or appearance differ from those described in this manual, please contact your oven dealer or customer service representative for assistance.
  • Page 37 INTRODUCTION 37 | P a g e cascadesciences.com Tel. 503 847-9047...

  • Page 38: Receiving Your Unit

    RECEIVING YOUR UNIT NSPECT THE HIPMENT • When a unit leaves the factory, safe delivery becomes the responsibility of the carrier. Damage sustained during transit is not covered by the manufacturing defect • warranty. Save the shipping carton until you are certain that the unit and its accessories function •...
  • Page 39 39 | P a g e cascadesciences.com Tel. 503 847-9047...

  • Page 40: Orientation Images

    RECEIVING RIENTATION MAGES CVO-5-EX-SS Ovens Vacuum and Backfilling Controls Touchscreen Display Over Temperature Limit Dial (Left side of the Oven Chamber Door Chamber Door Latch Chamber Door Handle Adjustable Leveling Foot Shelf Shelf Standard Mounting Rail Door Gasket 40 | P a g e cascadesciences.com Tel.
  • Page 41 RECEIVING Unit Back, All Standard Models Electronics Enclosure Pressure Relief Valve Power Cord Backfill: Optional Backfill Gas-In Port 1/4 Inch (6.35 ) OD Vent: Required Purge and Pressurize System Gas-In 1/4 Inch (6.35 mm) OD Vacuum: 3/8-inch (9.52 mm) OD Port Purge system exhaust Enclosure Warnings Label Oven Data Plate...
  • Page 42 RECEIVING Optional Side Valve All oven models may be ordered with an optional side-mounted KF-25 vacuum port and hand- valve. KF-25 Vacuum Port KF-25 Vacuum Port – for sensor probes connects to the vacuum pump 42 | P a g e cascadesciences.com Tel.

  • Page 43: Recording Data Plate Information

    RECEIVING ECORDING LATE NFORMATION Record the unit model number, serial number, Part Number, and PartID below for future reference. Customer Support needs this information to provide accurate help during support calls and emails. The data plate is located on the back of the oven, near the power cord or feed. •...
  • Page 44 RECEIVING 44 | P a g e cascadesciences.com Tel. 503 847-9047...

  • Page 45: Installation

    INSTALLATION Note: The installation party must possess the required competencies for installing equipment in the hazardous location zone. NSTALLATION ROCEDURES HECKLIST For installing the oven in a new workspace location. Pre-Installation  Verify a vacuum supply source suitable for your application is available and can be connected to the oven, page 33.

  • Page 46: Ventilation Assessment Required

    INSTALLATION ENTILATION SSESSMENT EQUIRED The ventilation system for the hazardous location the oven will be installed in must prevent buildups of potentially explosive gas or vapor mixtures in the air. Conditions under which this could occur include: • Excessive amounts of solvents or other hazardous materials evaporating from samples while being loaded into the oven chamber.

  • Page 47: Spark Reduction Or Elimination

    INSTALLATION PARK EDUCTION OR LIMINATION Your workspace must meet any spark reduction or elimination requirements mandated by your fire locality or other safety authority having jurisdiction. ENERAL OWER AFETY Your unit and its recommended accessories are engineered and tested to meet strict safety requirements and designed to connect to a power source using the specific power cord or hardwire power feed type built into the unit.

  • Page 48: Required Ambient Conditions

    INSTALLATION EQUIRED MBIENT ONDITIONS Required Location Conditions These units are built for use indoors for operating under the following conditions only. Room temperatures between 15°C and 40°C (59°F and 104°F) • At no greater than 80% Relative Humidity (at 25°C / 77°F) •...

  • Page 49: Required Clearances

    INSTALLATION EQUIRED LEARANCES These clearances are required for all ovens to provide airflows for ventilation and cooling. 12” (305 mm) 12” (305 mm) Power Cord 12” (305 mm) 6” (152 6” (152 mm) Door Swing 31.3” (795 mm) 6 inches (152 mm) of clearance is required on the sides. 12 inches (305 mm) of clearance is required on the back.

  • Page 50: Plug-In Power Source Requirements

    INSTALLATION OWER OURCE EQUIREMENTS For ovens with plug-in power cords. When selecting a location for a plug-in oven, verify each of the following requirements is satisfied: Power Source: The power source must meet the power requirements listed on the unit data plate.
  • Page 51 Continued next page 51 | P a g e cascadesciences.com Tel. 503 847-9047...
  • Page 52 INSTALLATION Power Cord Oven Requirements Continued Over Current Protection: A switch or circuit-breaker must be used in the building installation to protect against overcurrent conditions. Outside Zone 2: The switch or circuit breaker must be safely located outside the • hazardous location Zone.

  • Page 53: Hardwire Source Requirements

    INSTALLATION ARDWIRE OURCE EQUIREMENTS For ovens with hardwire power feeds. Also known as fixed installation or permanent connect wiring. When selecting a location for a hardwire connected oven, verify each of the following requirements is satisfied: Power Source: The source must meet the requirements listed on the unit data plate. Model Voltage Amps...
  • Page 54 Continued next page 54 | P a g e cascadesciences.com Tel. 503 847-9047...
  • Page 55 INSTALLATION Hardwire Power Requirements Continued Hardwired Power Cord Disconnect: The oven must be positioned so that all operators have access to the power cord disconnect in case of emergencies. • The disconnect must be near the equipment and within easy reach of the operator. •...

  • Page 56: Lifting And Handling

    INSTALLATION IFTING AND ANDLING The oven is heavy. Use appropriate powered lifting devices that are sufficiently rated for these loads. Follow these guidelines when lifting the oven: • Lift the oven only from its bottom surface. Doors, handles, and knobs are not adequate for lifting or stabilization. •...

  • Page 57: Leveling

    INSTALLATION EVELING For ovens that do not come mounted on a rolling stand, install the 4 leveling feet in the 4 corner holes in the bottom of the oven. The oven must be level and stable for safe operation. Note: T o prevent damage when moving the unit, turn all 4 leveling feet so that the leg of each foot 1 4 T 1 4 T 1 4 T sits inside the unit...

  • Page 58: Installation Cleaning

    INSTALLATION NSTALLATION LEANING The manufacturer recommends cleaning the shelving and oven chamber prior to installation of the shelving in the chamber. The unit was cleaned at the factory but may have been exposed to contaminants during shipping. Remove all wrappings and coverings from shelving before cleaning and installation. •...

  • Page 59: Vacuum Supply Installation

    INSTALLATION ACUUM UPPLY NSTALLATION Install the vacuum pump, connect it to the oven vacuum system, and set up the pump exhaust to vent safely outside the workspace. 1. Install the Pump • Read the vacuum pump manual and safety instructions prior to connecting the pump to the oven and a vacuum pump exhaust line.
  • Page 60 INSTALLATION Optional Side Valve Vacuum Supply Connection • Cap the Vacuum port on the back of the oven when using the side valve configuration. This is required to help safeguard against the intrusions of Zone 2 atmosphere into the oven chamber.
  • Page 61 End of Procedure 61 | P a g e cascadesciences.com Tel. 503 847-9047...

  • Page 62: Connect The Purge And Pressurize Gas Supply

    INSTALLATION ONNECT THE URGE AND RESSURIZE UPPLY The purge and pressurize gas supply must meet the requirements described in the Introduction G as Supply Requirements on page 34. Reminder: The purge and pressurize gas chapter 1 1 T 1 1 T 1 1 T 1 1 T 1 1 T 1 1 T supply also backfills the oven chamber when the Vent valve handle on the front control panel is in the open position.

  • Page 63: Optional Backfill Gas Supply

    INSTALLATION PTIONAL ACKFILL UPPLY A second supply of clean air or inert gas can be connected to the oven. This gas source is separate from the one used by the oven Purge and Pressurize system and provides an option to backfill the oven chamber with a different gas supply.

  • Page 64: Hardwire To Power Supply

    INSTALLATION Warning: The technician must verify there are no hazardous substances or potentially explosive atmospheres present prior to and while hardwiring an oven to its power supply and when initially testing the connection. Avertissement: Le technicien doit vérifier qu'il n'y a pas de substances dangereuses ou d'atmosphères potentiellement explosives présentes avant et pendant le câblage d'un four à...
  • Page 65 INSTALLATION 65 | P a g e cascadesciences.com Tel. 503 847-9047...

  • Page 66: Graphic Symbols

    GRAPHIC SYMBOLS The unit is provided with graphic symbols on its exterior. These identify hazards and adjustable components as well as important notes in the user manual. Symbol Definition Consult the user manual Consulter le manuel d'utilisation Caution hot surface Attention surface chaude AC Power Repère le courant alternatif...
  • Page 67 SYMBOLS 67 | P a g e cascadesciences.com Tel. 503 847-9047...

  • Page 68: Control Overview

    CONTROL OVERVIEW Main Control Panel Touchscreen Display and Controls The 15-minute automatic purge and pressurization cycle must complete before the oven operator can turn on the touchscreen controller using the Power button. When powered, the touchscreen controls heating in the oven chamber and displays the current chamber temperature and vacuum pressure.
  • Page 69 Continued next page 69 | P a g e cascadesciences.com Tel. 503 847-9047...
  • Page 70 CONTROLS Touchscreen Display and Controls continued Setpoint Button Shows the current temperature setpoint. This is the target temperature the oven chamber will heat to and then maintain after the Heating Button is tapped. Tap this button to change the setpoint. Timer Button Brings up the Timer menu.
  • Page 71 CONTROLS Note: Backfilling is the process of restoring atmosphere to the vacuumed down oven chamber. This is done by flowing gas into the chamber from a safe gas source connected to one of the gas- in ports on the back of the oven. Vacuum and Backfilling Gas Supply Valves Vacuum and Vent Valves Vacuum Valve Control...
  • Page 72 Continued next page 72 | P a g e cascadesciences.com Tel. 503 847-9047...
  • Page 73 CONTROLS Optional Side Vacuum Valve When open, the Side Valve allows a vacuum supply connected to the KF-25 side-mounted • port to evacuate the oven chamber. In the closed position, the valve closes and seals the port. • Verify the 1/4-inch Vacuum Port on the back of the oven is capped when using the side •...

  • Page 74: Operational Safety

    OPERATIONAL SAFETY PERATOR ESPONSIBILITIES Safe operation of the oven is dependent on the actions and behavior of the oven operators. Operating personnel must read and understand the safety guidelines and operating precautions in this chapter prior to operating the oven. The operators must follow these instructions to prevent injuries and to safeguard their health, environment, and the materials being treated in the oven, as well as to prevent damage to the oven.

  • Page 75: Sops And Operator Training

    OPERATIONAL SAFETY S AND PERATOR RAINING SOPs Required: The oven manufacturer cannot anticipate all baking applications or • processes that this oven may be used for. Specific, written SOPs are required for each application the oven is used for at your site. These must be written by someone: Who is familiar with your site.
  • Page 76 Turn off the GN flow after the oven is turned off. This helps reduce the risk of a leak or • accidental release while the oven is not in use. 76 | P a g e cascadesciences.com Tel. 503 847-9047...

  • Page 77: Hazardous Atmospheres Precautions

    OPERATIONAL SAFETY Warning Potential Electrostatic Charging Hazard: Operator actions can load the oven with potentially hazardous electrostatic charge. See the instructions on this page. Avertissement Risque potentiel de charge électrostatique: les actions de l'opérateur peuvent charger le four avec une charge électrostatique potentiellement dangereuse. Consultez les instructions ci- dessous.
  • Page 78 Follow the SOP: SOPs should be followed during the operation of the oven, including • strict adherence to the maximum allowed operating temperatures and setting the over- temperature limit system. 78 | P a g e cascadesciences.com Tel. 503 847-9047...

  • Page 79: Operating Precautions

    OPERATIONAL SAFETY Warning Hot Surfaces: These areas are marked with Hot Surface labels. Proper protective equipment should be employed to minimize the risk of burns. Avertissement Surface Chaude: Ces zones sont marquées avec des étiquettes de surface chaude. Un équipement de protection approprié devrait être utilisé pour minimiser le risque de brûlures. PERATING RECAUTIONS Verify the oven is in a safe state prior to powering it.
  • Page 80 Fire Suppression: Ensure the fire suppression system and extinguishers are always • operational or available during oven operation and comply with all applicable standards for your hazardous location and fire jurisdiction. 80 | P a g e cascadesciences.com Tel. 503 847-9047...

  • Page 81: Electronics Enclosure Warnings

    OPERATIONAL SAFETY LECTRONICS NCLOSURE ARNINGS These warnings are marked on a label plate on the oven exterior. The term Enclosure in the markings refers to the electronics component bay located inside the top of the oven. WARNING – POTENTIAL ELECTROSTATIC CHARGING HAZARD – SEE INSTRUCTIONS AVERTISSEMENT –...
  • Page 82 AVERTISSEMENT - CE BOÎTIER CONTIENT DU GAZ INERT ET PEUT ÊTRE UN RISQUE D'ASPHYXIATION. CETTE BOÎTE CONTIENT ÉGALEMENT UNE SUBSTANCE INFLAMMABLE QUI PEUT ÊTRE DANS LES LIMITES D'INFLAMMABILITÉ LORSQU'ELLE EST EXPOSÉE À L'AIR. 82 | P a g e cascadesciences.com Tel.

  • Page 83: Purge And Pressurization System Specifications

    OPERATIONAL SAFETY URGE RESSURIZATION YSTEM PECIFICATIONS The purge and pressurization protection system has the following characteristics. • Purge Flow Rate: 117.5 NLPM (Normal Liters per Minute) • Minimum Flow Rate: 64.25 NLPM • Maximum Air Supply Pressure: 13.7 bar Maximum Overpressure: 72 mbar •...

  • Page 84: Operation

    OPERATION HEORY OF PERATION Purge and Pressurize Process The built-in purge and pressurize system is engineered to prevent potentially explosive atmospheres from coming into contact with the oven’s high-voltage electronic components when they are powered. This prevents the components — including the heating elements — from serving as explosion-ignition sources. The controller, power, and other major systems components are located in an enclosure at the top of the oven.
  • Page 85 OPERATION Vacuum System In addition to the purge and pressurize requirements, the oven does not allow the heating elements to energize unless the oven chamber is vacuumed down to 0.1 bar (76 Torr) or lower. The heating elements are automatically depowered if the pressure rises above 0.1 bar. Vacuum is supplied by an external vacuum pump or building supply system connected to an oven vacuum port.
  • Page 86 setpoint, the oven uses minimum heating to control the rate of cooling and avoid dipping below the setpoint. 86 | P a g e cascadesciences.com Tel. 503 847-9047...
  • Page 87 OPERATION The PID loops also optimize heating rates to compensate for the temperature environment around the unit. If the unit is operating in a cool room, the controller will increase the length of the heating pulses. Likewise, when operating in a warm room the unit uses shorter pulses. If the ambient temperature conditions change significantly, there may be minor over or undershoots as the unit adapts.
  • Page 88 pressurize supply source. The choice of backfilling gas source must be included in your site SOPs for each baking application. 88 | P a g e cascadesciences.com Tel. 503 847-9047...

  • Page 89: Put The Oven Into Operation

    OPERATION Note: All procedures in the Installation chapter must be completed prior to starting the operational setup on this page. UT THE VEN INTO PERATION After the oven is installed in a new workspace location, complete the steps and procedures listed in this entry.
  • Page 90 OPERATION  Wait until the automatic purge cycle completes – approximately 15 minutes – ensuring any potentially explosive concentrations of gases or vapors have been expelled from the oven electronics and heating element enclosures.  Perform the T urn on the Oven procedure on page 92.

  • Page 91: Pre-Operation Safety Verifications

    OPERATION PERATION AFETY ERIFICATIONS Prior to providing power or gas to the oven, the operator should verify the following. Verify the oven is safe to put into operation. Check the documentation service file if restoring the oven to operation after a repair or other service. The file should indicate the oven was tested by a qualified service technician and is safe to put into operation.

  • Page 92: Supply Power To The Oven

    OPERATION Reminder: Power cord ovens must be plugged into an electrical outlet located outside of the hazardous location Zone. Rappel: les fours à cordon d'alimentation doivent être branchés dans une prise électrique située à l'extérieur de l'emplacement ou de la zone classée dangereuse. UPPLY OWER TO THE This procedure triggers the automated purge and pressurize process.
  • Page 93 The Button will illuminate continuously, and the Control Display screen will • activate. 93 | P a g e cascadesciences.com Tel. 503 847-9047...

  • Page 94: Selecting A Language

    OPERATION ELECTING A ANGUAGE The unit controller can display information in either English or French. 1. Tap the Settings button on the Homepage. 2. Tap the Select Language button. 3. Choose the language for the oven display. 4. Tap the Home button to return to the Settings menu. 94 | P a g e cascadesciences.com...
  • Page 95 End of Procedure 95 | P a g e cascadesciences.com Tel. 503 847-9047...

  • Page 96: Changing The Unit Of Measurement

    OPERATION HANGING THE NIT OF EASUREMENT 1. Tap the Settings button on the Homepage. 2. Tap the Select Units button on the Settings page. 3. Select the desired units of measurement for both the temperature and vacuum display values. Vacuum Pressure Temperature 4.

  • Page 97: Latch The Oven Chamber Door

    OPERATION ATCH THE HAMBER Ensure the oven door is securely latched before placing the chamber under vacuum. Position the door handle. Swing the handle wheel all the way to the left, until it is facing forward. • Secure the chamber door. Using one hand, turn the handle wheel clockwise (to the right) until the tongue of the •...
  • Page 98 Leave the handle facing forward. This prevents the door from springing • open if the chamber is overpressurized. 98 | P a g e cascadesciences.com Tel. 503 847-9047...

  • Page 99: Pumping Down And Backfilling The Oven

    OPERATION UMPING OWN AND ACKFILLING THE Reminder: Verify which valve control your process uses for backfilling the oven (Backfill or Vent). Pump Down the Oven Chamber Verify the Vacuum, Vent, and Backfill Valve controls are in the closed position. This protects your vacuum pump from exposure to •...

  • Page 100: Pump Down And Backfill - Side Valve

    OPERATION – S OWN AND ACKFILL ALVE Reminder: Verify which valve control your process uses for backfilling the oven (Backfill or Vent). Pump Down the Oven Chamber Verify the Vacuum, Vent, and Backfill Valve controls are in the closed position This protects your vacuum pump from exposure to •...

  • Page 101: Set The Temperature Setpoint

    OPERATION ET THE EMPERATURE ETPOINT Enter the target temperature of your baking application. 1. Tap the Setpoint button on the Homepage. 2. Use the arrow buttons to adjust the setpoint. 3. Tap the Save button to save the new setpoint. The display automatically returns to the Homepage.
  • Page 102 Note: See the next page for how to begin heating the oven chamber. 102 | P a g e cascadesciences.com Tel. 503 847-9047...

  • Page 103: Heat The Oven

    OPERATION EAT THE After saving a constant temperature setpoint, the oven is ready to begin heating. To heat the oven: 1. Tap the START Heating button. Oven heating to 40.5°C Reminder: The oven will not heat unless the oven chamber is vacuumed down to 76 Torr •...
  • Page 104 End of Procedure 104 | P a g e cascadesciences.com Tel. 503 847-9047...

  • Page 105: Oven Heating Safety Interrupts

    OPERATION EATING AFETY NTERRUPTS Oven Chamber Vacuum Pressure Rises The oven automatically stops heating when the oven chamber pressure rises above 76 Torr (0.1 bar). Heating remains off until the chamber pressure drops to 76 Torr or lower. Overpressure Loss The oven reverts to standby mode If the electronics or heating element safety enclosures lose overpressure.

  • Page 106: Set The Over Temperature Limit

    OPERATION Note: Test the OTL system at least once per year to verify its functionality. Failure to set the OTL voids the manufacturing defect warranty if over-temperature damage occurs. ET THE EMPERATURE IMIT Perform this procedure when the unit has been running under vacuum at your baking application’s highest temperature for at least 30 minutes with no temperature fluctuations.
  • Page 107 external or internal temperature fluctuations, contact Customer Support or your distributor for assistance. End of Procedure 107 | P a g e cascadesciences.com Tel. 503 847-9047...

  • Page 108: Oven Heating Dynamics

    OPERATION EATING YNAMICS Vacuum ovens heat slowly compared to conventional ovens. This is due in part to the physics of heat flow in an environment without an atmosphere to help transport and evenly distribute thermal energy in the oven chamber. Best practices for vacuum oven heating include: Never place product or samples on the floor of the oven chamber.

  • Page 109: Oven Cooldowns

    OPERATION OOLDOWNS The oven chamber is well insulated and requires a significant length of time to cool down while remaining sealed. 6 hours may be required to cool down from 150°C to 100°C. • 16 hours may be needed for the oven to return to room temperature cooling from 150°C. •...

  • Page 110: Using The Timer

    OPERATION Note: Starting the timer does not begin heating. Heating must be separately launched by the operator. SING THE IMER The oven can be set to heat for a limited duration. At the end of this timed period, the oven stops heating.
  • Page 111 Tap the red timer Stop button to clear the Timer Finished message. • 111 | P a g e cascadesciences.com Tel. 503 847-9047...

  • Page 112: Inches Of Mercury Display

    OPERATION NCHES OF ERCURY ISPLAY The oven can measure and display vacuum pressure in Torr, Barr, and inches of mercury (InHg). Torr and Barr are absolute measurements. Inches of mercury is a relative measurement of how much pressure has been pumped from the oven chamber. The baseline InHg pressure is set for just above sea level.

  • Page 113: User Maintenance

    USER MAINTENANCE ERVICE AND ERVICE OCUMENTATION EQUIREMENTS Reminders Certified Repair Facility Required: Repairs, overhauls, and other services must be • performed at an IEC Ex-certified facility or by certified and competent technicians from a certified facility. Service Documentation File Access: Service facilities and their technicians must have •...
  • Page 114 isolated by the purge and pressurization safety system from contact with potentially explosive atmospheres during powered operation. 114 | P a g e cascadesciences.com Tel. 503 847-9047...

  • Page 115: Software And Firmware Updates

    MAINTENANCE OFTWARE AND IRMWARE PDATES Software and firmware updates are service-level procedures and require opening the electronics enclosure. Ex-marked explosion protection ovens for Zone 2 and Class 1 Division 2 spaces cannot have an external data port for updates due to the sparking hazard. AINTAINING TMOSPHERIC NTEGRITY...
  • Page 116 End of Procedure 116 | P a g e cascadesciences.com Tel. 503 847-9047...

  • Page 117: Cleaning

    MAINTENANCE Warning: Disconnect this unit from its power supply prior to performing maintenance or services. Avertissement: Débranchez cet appareil de son alimentation électrique avant d'effectuer la maintenance ou les services. LEANING If a hazardous material or substance has spilled in the oven, immediately initiate your site’s Hazardous Material Spill Containment protocol.
  • Page 118 Wipe across the screen surface while maintaining continual contact. This should avoid triggering the buttons. 118 | P a g e cascadesciences.com Tel. 503 847-9047...

  • Page 119: Vacuum Pump Maintenance

    MAINTENANCE Continued from the previous page Oven Chamber Cleaning Guidelines Remove any removable chamber accessory items such as shelving if present. • • Use 99% isopropyl alcohol to clean chamber surfaces and shelving. Apply using lint-free wipes. • Clean all removable accessories and components. Verify the cleaning alcohol has evaporated completely from all chamber surfaces and •...

  • Page 120: Calibrate The Temperature Display

    Never use alcohol or mercury-based thermometers. Cascade Sciences CVO ovens do not normally require calibration. Should your SOP or quality program require calibrations, follow this guideline. Temperature calibrations match the oven temperature display to the actual shelving temperature inside the oven chamber.
  • Page 121 MAINTENANCE 6. Heat up and stabilization period: The oven shelving temperature must be stable at temperature in a vacuum environment to perform an accurate calibration. The temperature is considered stabilized when the oven chamber has operated at your • calibration temperature for at least 1 hour with no fluctuations greater than the specified temperature stability of the oven.
  • Page 122 MAINTENANCE Temperature Calibration Continued Tap the Settings button on the Homepage. Tap the Service Functions button. Enter 510 in the Service Function Code field and then tap the Save button. This brings up the Calibration Menu. • 122 | P a g e cascadesciences.com Tel.
  • Page 123 Continued next page 123 | P a g e cascadesciences.com Tel. 503 847-9047...
  • Page 124 MAINTENANCE Temperature Calibration Continued Use the arrow buttons to enter the reference device reading. The temperature calibration function has a range of approximately ±10°C (18°F). For • temperature deviations outside these parameters, contact Technical Support. Reference Tap the Save button to save the new temperature. The display will automatically return to the Settings menu page.
  • Page 125 Continued next page 125 | P a g e cascadesciences.com Tel. 503 847-9047...
  • Page 126 MAINTENANCE Temperature Calibration Continued Allow 1 hour for the oven to stabilize • Wait one hour after the oven has reached the corrected temperature. Failure to wait until the oven is fully stabilized will result • in an inaccurate reading. Compare the reference device and the corrected oven temperature display If the reference device and the chamber temperature display readings are now the same or •...
  • Page 127 End of Procedure 127 | P a g e cascadesciences.com Tel. 503 847-9047...
  • Page 128 MAINTENANCE 128 | P a g e cascadesciences.com Tel. 503 847-9047...

  • Page 129: Replacement Parts

    REPLACEMENT PARTS Description Parts Number Adjustable leveling foot, 1 each (requires 4) 2700506 Shelf 5680563 Shelf clips Requires 4 clips per shelf 1250510 Door Gasket 3450789 Vacuum Tubing Connection Kit, Side Vacuum Valve Option Tubing with KF-25 fittings and 2 KF-25-sized clamps. 9990876 129 | P a g e...
  • Page 130 REPLACEMENT PARTS 130 | P a g e cascadesciences.com Tel. 503 847-9047...

  • Page 131: Appendices

    APPENDICES PECIAL ONDITIONS Potential Electrostatic Charging Hazard This equipment incorporates non-metallic parts of the enclosures. These components should only be contacted with a damp cloth as per the warnings on the equipment and in the manual to prevent the possibility of ignition through static discharge. See page 77 for additional hazard warnings and precautions.

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