Cascade Sciences CVO-5-EX Series User manual

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

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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.
Power Cord Plug-In Location Requirement
CVO-5-EX-SS ovens that come with power cords must plug into a power outlet located safely
outside of the hazardous location zone the oven will be installed in. This is to prevent the possibility
of sparking in the presence of potentially explosive concentrations of hazardous gases or vapors.
The outlet must also meet the other electrical safety requirements described in this manual. The
supplied power cord is 15-feet long (4.6 meters).
Hardwire Connection Location Requirements
CVO-5-EX-SS ovens with hardwire power feeds may be wired to a power source inside the
hazardous location Zone. However, this connection must meet all applicable electrical safety
standards requirements Zone 2 or Class 1 Zone 2 or Class 1 Division 2 hazardous (classified)
locations. Additionally, the connection must be made by a qualified electrical service technician who
is competent to work in the hazardous location zone and with these equipment types.

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CVO-5-EX-SS Flammable Solvent Ovens
115 Voltage Models: CVO-5-EX-SS, CVO-5-EX-SS-H
230 Voltage Models: CVO-5-EX-2-SS, CVO-5-EX-2-SS-H
Part Number (Manual): 4861849
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
Model Name CVO-5-EX-SS-H
Item Number
TBD
M Part ID
CSVXBS522-H120
230 Volt Hardwire Units
Model Name CVO-5-EX-2-SS-H
Item Number
TBD
M Part ID
CSVXBS522-H
115 Volt Power Cord Units
Model Name CVO-5-EX-SS
Item Number
CS-2101121603
M Part ID
CSVXBS522-N
Cord Type:
NEMA 5-15P
230 Volt Power Cord Units
Model Name
CVO-5-EX-2-SS
CVO-5-EX-2-SS
Item Number
TBD
TBD
M Part ID
CSVXBS522-NA
CSVXBS522-NE
Cord Type:
NEMA 6-15P
EURO CEE 7/7

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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 .............................................................................................................12
Weight..........................................................................................................................................13
Dimensions ...................................................................................................................................13
Capacity........................................................................................................................................14
Shelf Capacity by Weight ...............................................................................................................14
Power...........................................................................................................................................14
Unit Dimension Drawings...............................................................................................................15
INTRODUCTION .......................................................................................................................18
Read This Manual..........................................................................................................................18
Oven Overview..............................................................................................................................18
Intended Uses and Locations .........................................................................................................20
Standard Atmospheres and Materials Only ......................................................................................20
Required Hazardous Location Competencies ...................................................................................20
Hazardous Zones Map ...................................................................................................................21
Allowed Locations, Materials, and Temperatures .............................................................................23
Hazardous Location Considerations.................................................................................................26
Explosion Prevention Systems Overview..........................................................................................28
Service Requirements ....................................................................................................................31
Service Documentation Requirements.............................................................................................32
Repair Report Required..................................................................................................................32
Vacuum Supply Required ...............................................................................................................33
Purge Gas System Requirements....................................................................................................34
Gasket Chemical Vulnerabilities ......................................................................................................36
Contacting Assistance ....................................................................................................................36
Engineering Improvements ............................................................................................................36
RECEIVING YOUR UNIT ...........................................................................................................38
Inspect the Shipment ....................................................................................................................38
Orientation Images........................................................................................................................40
Recording Data Plate Information...................................................................................................43
INSTALLATION .........................................................................................................................45
Installation Procedures Checklist ....................................................................................................45
Ventilation Assessment Required ....................................................................................................46
Spark Reduction or Elimination.......................................................................................................47
General Power Safety ....................................................................................................................47
Required Ambient Conditions .........................................................................................................48
Required Clearances......................................................................................................................49
Plug-In Power Source Requirements...............................................................................................50
Hardwire Source Requirements ......................................................................................................53
Lifting and Handling ......................................................................................................................56
Removing from the Pallet...............................................................................................................56
Leveling........................................................................................................................................57
Install and Secure the Oven ...........................................................................................................57
Installation Cleaning ......................................................................................................................58

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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................................................................................................................74
General Safety Guidelines ..............................................................................................................74
SOPs and Operator Training...........................................................................................................75
Inert Gas Asphyxiation Hazard .......................................................................................................75
Hazardous Atmospheres Precautions ..............................................................................................77
Operating Precautions ...................................................................................................................79
Electronics Enclosure Warnings ......................................................................................................81
Purge And Pressurization System Specifications...............................................................................83
OPERATION ..............................................................................................................................84
Theory of Operation ......................................................................................................................84
Put the Oven into Operation...........................................................................................................89
Pre-Operation Safety Verifications ..................................................................................................91
Supply Gas to the Purge and Pressurize System ..............................................................................91
Supply Power to the Oven..............................................................................................................92
Purge and Pressurize Process.........................................................................................................92
Turn on the Oven..........................................................................................................................92
Selecting a Language.....................................................................................................................94
Changing the Unit of Measurement.................................................................................................96
Latch the Oven Chamber Door .......................................................................................................97
Pumping Down and Backfilling the Oven.........................................................................................99
Pump Down and Backfill – Side Valve ........................................................................................... 100
Set the Temperature Setpoint ...................................................................................................... 101
Heat the Oven............................................................................................................................. 103
Oven Heating Safety Interrupts .................................................................................................... 105
Set the Over Temperature Limit ................................................................................................... 106
Oven Heating Dynamics............................................................................................................... 108
Loading and Unloading the Oven.................................................................................................. 108
Oven Cooldowns ......................................................................................................................... 109
Power Interruptions..................................................................................................................... 109
Using the Timer........................................................................................................................... 110
Inches of Mercury Display............................................................................................................ 112
USER MAINTENANCE............................................................................................................. 113
Service and Service Documentation Requirements......................................................................... 113
User Manual Access..................................................................................................................... 113
Safety After Repairs and Maintenance........................................................................................... 113
Electrical Components ................................................................................................................. 113
Software and Firmware Updates................................................................................................... 115
Maintaining Atmospheric Integrity ................................................................................................ 115
Door Gasket Replacement............................................................................................................ 115
Cleaning ..................................................................................................................................... 117
Vacuum Pump Maintenance ......................................................................................................... 119
Calibrate the Temperature Display................................................................................................ 120
REPLACEMENT PARTS ........................................................................................................... 129
APPENDICES ......................................................................................................................... 131

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Special Conditions Of Use ............................................................................................................ 131

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TABLE OF CONTENTS

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SAFETY CERTS AND STATEMENTS
EX HAZARDOUS LOCATION CERTIFICATION
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. This means the ovens are certified for safe operation in locations where
explosive concentrations of specific volatile gases or vapors occur infrequently, unintentionally, and
only for short durations — typically due to accidents, leaks, or failure of a positive ventilation
system. These concentrations are only allowed within the temperature class range and for the
specified hazardous material types denoted on the unit data plate marks. Those marks are
replicated on this page for reference. A more detailed explanation of allowed temperatures and
hazardous material categories can also be found in the Introduction chapter of this manual starting
on page 23. The specific safety standards are listed on the next page.
Recognized Test Body: Intertek is an OSHA-recognized NRTL in the US, a Standards Council of
Canada accredited certification body, and an EU Notified Body.
NFPA 70: The UL 60079-2 hazardous equipment standards listed in this chapter satisfy the US
National Electrical Code’s NFPA 70 Article 500 and 505 requirements for hazardous (classified)
location equipment installed in Class 1 Division 2 and Class 1 Zone 2 locations as well as NFPA 496
requirements for purge and pressurized equipment.
CEC: The CSA 60079-2 hazardous equipment standards listed in this chapter satisfy Section 18 of
CSA C22.1 in the Canadian Electrical Code for equipment installed in Zone 2 locations.
North America and Canada Oven Safety Markings and Certificate Number:
Class I, Zone 2, AEx ia mc pzc IIC T2 Gc
Class I, Division 2, Groups A-D, T2
Ex ia mc pzc IIC T2 Gc
Ambient Temperature Range: +10°C ≤ Ta ≤ +40°C
cETL Cert No: ETL21CA104549658X
IECEx Oven Safety Markings and Certificate Number
Ex ia mc pzc IIC T2 Gc
+10°C ≤ Tamb ≤ +40°C
IECEx Cert No.: IECEx ETL 21.0016X
Italy ATEX and UKCA Oven Safety Markings and Certificate Number
ATEX II 3 G Ex ia mc pzc IIC T2 Gc
+10°C ≤ Ta ≤ +40°C
Italy ATEX Cert No.: ITS-I21ATEX29544X
UKCA Cert No.: ITS21UKEX0118X

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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. 60079-0, 60079-2, 60079-11, 60079-18 (Canada)
ELECTROMECHANICAL AND HEATING SAFETY
IEC 61010-1 and 61010-2 Safety Certified + USA, Canada, Europe Differences
This certificate satisfies NRTL electrical, mechanical, temperature safety requirements in the United
States.
These unit models are certified by Intertek as compliant with the International Electrotechnical
Commission’s 61010 safety standards for electrical and mechanical hazards as well as the heating
of materials in laboratory devices. The units also conform or are certified to the following national
and group differences.
Conforms to UL Standards (United States)
UL 61010-1:2012/AMD1:2016
UL 61010-2-010:2019
Certified to CSA Standards (Canada)
C22.2 #61010-1-12:2012
C22.2 #61010-2-010:2019
Certified to EN Standards (European Standards)
EN 61010-1:2012/AMD1:2016
EN 61010-2-010:2019
Intertek is an OSHA-recognized NRTL, a Standards Council of Canada accredited certification body,
and an EU Notified Body.
5019746

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SAFETY CERTS AND STATEMENTS
CE COMPLIANT
These unit models meet all required Electromagnetic Compatibility (EMC), EU low-
voltage, and RoHS safety directives.
UKCA COMPLIANT
These unit models meet all required Electromagnetic Compatibility (EMC), low-voltage,
and RoHS safety directives.
ISO CERTIFIED MANUFACTURER
These models are manufactured for Cascade Sciences by Sheldon Manufacturing, INC,
an ISO-certified manufacturer.
CALIFORNIA PROPOSITION 65 STATEMENT
For US compliance only.
17T17T17TWarning:17T17T17T This product contains chemicals, including Triglycidyl Isocyanurate, known to the State
of California to cause cancer as well as birth defects or other reproductive harm. For more
information go to 11T11T11Twww.P65Warnings.ca.gov11T11T11T.
17T17T17T¡Advertencia! Este producto contiene sustancias químicas, incluido el triglicidil isocianurato, que el
estado de California sabe que causa cáncer, así como defectos de nacimiento u otros daños
reproductivos. Para obtener más información, visite www.P65Warnings.ca.gov17T17T17T.
Avertissement! Ce produit peut vous exposer à des produits chimiques, dont l'isocyanurate de
triglycidyle, reconnu par l'État de Californie pour provoquer le cancer, des anomalies congénitales ou
d'autres problèmes de reproduction. Pour plus d'informations, visitez le site www.P65Warnings.ca.gov

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SAFETY CERTS AND STATEMENTS

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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. All indications are average values, typical for units
produced in the series. We reserve the right to alter technical specifications at all times.
TEMPERATURE PERFORMANCE
Operating Range
Model Fahrenheit Celsius
All Units Ambient +26°to 392°F Ambient +15°to 200°C
Temperature Uniformity
Model Fahrenheit Celsius
All Units ± 3% of Setpoint ± 3% of Setpoint
Temperature Stability
Model Fahrenheit Celsius
All Units ± 0.3°F ±0.2°C

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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
Approximate times with the chamber under vacuum. Cooling rates may be influenced by ambient
conditions.
Model From 105°F (40°C) From 200°F (90°C) From 300°F (150°C)
All Units 345 Minutes 345 Minutes 345 Minutes
WEIGHT
Model Shipping Net Weight
All Units 690 lb / 313 kg 430.0 lb / 195.0 kg
DIMENSIONS
In Inches
Model
Exterior W × D × H
Interior W × D × H
All Units* 29.3 x 39.1 x 34.4 in 18.1 x 24.0 x 18.1 in
*Units with optional side-mounted vacuum valve have exterior dimensions 33.3 x 42.4 x 34.4 in
In Millimeters
Model Exterior W × D × H Interior W × D × H
All Units* 744 x 993 x 874 mm 460 x 611 x 460 mm
*Units with optional side-mounted vacuum valve have exterior dimensions 846 x 1077 x 874 mm

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SPECIFICATIONS
CAPACITY
Model Cubic Feet Liters
All Units 4.5 127.4
SHELF CAPACITY BY WEIGHT
Model Per Shelf Total
All Units 50.0 lb / 22.7 kg 225.0 lb / 102.0 kg
POWER
Power Cord Models
Model
AC Voltage
Amperage
Frequency
Phase
CVO-5-EX-SS 115 12 50/60 Hz 1
CVO-5-EX-2-SS 230 6 50/60 Hz 1
Hardwired Power Feed Models
Model AC Voltage Amperage Frequency Phase
CVO-5-EX-SS-H 115 12 50/60 Hz 1
CVO-5-EX-2-SS-H 230 6 50/60 Hz 1

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SPECIFICATIONS
UNIT DIMENSION DRAWINGS
Total Height: 34.4 inches (874
mm)
Width: 29.3 inches (744
mm)
Depth: 39.1 inches (993
mm)
Chamber Interior
Depth: 24.0 inches (611 mm)
Width: 18.1 inches (460 mm)
Height: 18.1 inches (460 mm)
Exterior
Dimensions
Cutaway Side View

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SPECIFICATIONS
Ovens with the Optional Side Valve
See the previous page for internal dimensions.
Exterior Dimensions
Total Height: 34.4 inches (874 mm)
Width: 33.3 inches (846
mm)
Depth: 42.4 inches (1077 mm)

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SPECIFICATIONS

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INTRODUCTION
READ THIS MANUAL
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,
and maintain the unit in a safe manner. Ensure all operators are given appropriate training
before the unit begins service.
•The Introduction chapter of this manual only provides a summary overview. It does not
substitute for reading the specific procedures as well as the warnings and cautions in
subsequent chapters on how to safely install, operate, and maintain the oven.
•Keep this manual available for use by all operators.
This manual is informational only, and the manufacturer accepts no liability due to actions taken or
not taken on basis of the content contained within it.
Introduction Chapter Overview
This chapter provides a summary overview of knowledge required to understand the locations the
oven can be installed in; the hazardous material types it is engineered to work with or around;
operator competencies; the explosion-preventing protection technologies it employs; special repair
(service) and repair documentation requirements; utilities such as gas and vacuum as well as
consumables required to operate the oven.
OVEN OVERVIEW
IEC Ex-marked CVO-5-EX-SS vacuum ovens are designed to help prevent the ignition of potentially
explosive concentrations of gases or vapors in the workspace atmosphere surrounding the oven.
This helps safeguard against concentrations created by accidents such as solvent spills, evaporation
from solvent containers inadvertently left open, or the failure of a room ventilation system. The
ovens are not designed or certified for use in locations where explosive concentrations are
always or frequently present in the workspace atmosphere as a part of normal operations.
To help safeguard against igniting ambient explosive concentrations, the oven automatically purges
and over pressurizes internal enclosures containing its high-voltage electronic components,
including the heating elements. This purge and pressurize process is described in detail in this
manual and must be allowed to complete before the oven can be turned on. Additional safety
interlocks and features help to further protect against ignition.
The oven is engineered to help prevent the ignition of some hazardous gas and vapor types that
are regularly present and contained in the oven chamber and vacuum plumbing as a part of
standard operations. This includes solvent outgassing during extraction processes under vacuum

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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.

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INTRODUCTION
INTENDED USES AND LOCATIONS
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. The ovens are not intended for use at household locations.
This equipment is not intended for uses outside the applications and conditions noted in this
section.
STANDARD ATMOSPHERES AND MATERIALS ONLY
No Enriched Oxygen Atmospheres
The oven protection features in no way mitigate or safeguard against hazards created by enriched
oxygen atmospheres. These hazards fall outside the IEC 60079 hazardous location equipment
directives the oven is designed to meet.
No Pyrotechnics or Explosives
The oven is not built to work with pyrotechnics or explosives. It is not an explosion safety oven. It
is not designed to contain or channel explosions. As an oven built with explosion protection
systems, it is intended to help prevent hazardous atmospheres blasts rather than mitigate
explosions.
REQUIRED HAZARDOUS LOCATION COMPETENCIES
Oven operators, process technicians, installers, and anyone else who will interact with these ovens
must be competent to work in the hazardous classified location type it will be installed and
operated in. Trainers, SOP writers, and anyone who instructs or trains personnel on these ovens
must be at least knowledgeable of the hazardous location type and the explosion protection
systems used in the oven.