Cascade TEK TVO-2 User manual

Vacuum Ovens TVO-2 TVO-5
Installation and Operation Manual

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Pictured on front cover, left to right: TVO-2, TVO-5
Manufacturing Warranty
For warranty information outside the USA please visit:
www.cascadetek.com/resource/limited-international-warranty-policy-cascade-tek-solution-llc
For warranty information inside the USA please visit:
www.cascadetek.com/resource/limited-usa-warranty-policy-–-cascade-tek-solutions-llc

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Vacuum Ovens 110 – 120 Voltage
Part Number (Manual): 4861795
Revision: April 16, 2018
Sheldon Part ID Numbers:
TVO-2 TVO-5
CTV222 CTV522
Cascade TEK is a brand of Sheldon Manufacturing, INC.
Safety Certifications
These units are CUE listed by TÜV SÜD as vacuum ovens for professional, industrial or educational
use where the preparation or testing of materials is done at an ambient air pressure range of 22.14 –
31.3 inHg (75 – 106 kPa), and no flammable, volatile or combustible materials are being heated.
These units have been tested to the following requirements:
CAN/CSA C22.2 No. 61010-1:2012
CAN/CSA C22.2 No. 61010-2-010/R:2009
UL 61010-1:2012
UL 61010A-2-010:2002
EN 61010-1:2010
EN 61010-2-010:2003

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TABLE OF CONTENTS
INTRODUCTION .........................................................................................................................................................7
Read this Manual.................................................................................................................................................................... 7
Safety Considerations and Requirements ...................................................................................................................... 7
Contacting Assistance ..........................................................................................................................................................8
Engineering Improvements..................................................................................................................................................8
Vacuum Supply Required ....................................................................................................................................................9
Gaskets ................................................................................................................................................................................... 10
RECEIVING YOUR OVEN .........................................................................................................................................11
Inspect the Shipment............................................................................................................................................................ 11
Orientation Photos ............................................................................................................................................................... 12
Record the Data Plate Information.................................................................................................................................. 15
INSTALLATION ......................................................................................................................................................... 17
Installation Procedure Checklist .......................................................................................................................................17
Required Ambient Conditions........................................................................................................................................... 18
Required Clearances........................................................................................................................................................... 18
Power Source Requirements ............................................................................................................................................ 19
Lifting and Handling ............................................................................................................................................................ 19
Leveling.................................................................................................................................................................................. 20
Install the Oven .................................................................................................................................................................... 20
Installation Cleaning........................................................................................................................................................... 20
Shelving Installation............................................................................................................................................................. 21
Connect to the Vacuum Supply ...................................................................................................................................... 23
GRAPHIC SYMBOLS ............................................................................................................................................... 25
CONTROL OVERVIEW ............................................................................................................................................ 27
OPERATION.............................................................................................................................................................. 29
Operating Precautions....................................................................................................................................................... 29
Theory of Operation ........................................................................................................................................................... 30
Put the Oven into Operation ............................................................................................................................................ 32
Set the High Temperature Limit...................................................................................................................................... 34
Evacuating and Backfilling the Oven Chamber ......................................................................................................... 35
Setting the Constant Temperature Setpoint ............................................................................................................... 36
Heating Profiles ................................................................................................................................................................... 36
High Temperature Limit Activated ..................................................................................................................................37
Change Unit of Measurement ......................................................................................................................................... 38
Vacuum Gauge Operations ............................................................................................................................................. 39
Maximum Obtainable Vacuum........................................................................................................................................ 40
Pressure Units Conversion Chart.................................................................................................................................... 40
Data Ports............................................................................................................................................................................... 41
OPERATOR MAINTENANCE.................................................................................................................................. 43
Cleaning................................................................................................................................................................................. 43
Maintaining Atmospheric Integrity ................................................................................................................................. 44
Electrical Components....................................................................................................................................................... 44
Storage................................................................................................................................................................................... 44
Diagnostic Questionnaire — Heating Issues............................................................................................................... 45
Diagnostic Questionnaire — Vacuum leak issues..................................................................................................... 50
UNIT SPECIFICATIONS .......................................................................................................................................... 57
Weight......................................................................................................................................................................................57
Dimensions.............................................................................................................................................................................57
Capacity ..................................................................................................................................................................................57
Shelf Capacity by Weight...................................................................................................................................................57
Vacuum .................................................................................................................................................................................. 58
Temperature ......................................................................................................................................................................... 58

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Power...................................................................................................................................................................................... 58
REPLACEMENT PARTS LIST.................................................................................................................................. 59
Replacement Gaskets........................................................................................................................................................ 60

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TABLE OF CONTENTS

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INTRODUCTION
Thank you for purchasing a Cascade TEK oven. We know you have many choices in today’s
competitive marketplace when it comes to constant temperature equipment. We appreciate you
choosing ours. We stand behind our products and will be here if you need us.
READ THIS MANUAL
Failure to follow the guidelines and instructions in this operation 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. Keep this manual available for use by all operators. Ensure all
operators are given appropriate training before the unit begins service.
SAFETY CONSIDERATIONS AND REQUIREMENTS
Follow basic safety precautions, including all national laws, regulations, and local ordinances in your
area regarding the use of this unit. If you have any questions about local requirements, please
contact the appropriate agencies.
SOPs
Because of the range of potential applications this unit can be used for, the operator or their
supervisors must draw up a site-specific standard operating procedure (SOP) covering each
application and associated safety guidelines. This SOP must be written and available to all operators
in a language they understand.
Intended Applications and Locations
TVO vacuum ovens are engineered for constant temperature drying, curing, and baking applications
under vacuum in professional, industrial, and educational environments. The ovens are not intended
for use at hazardous or household locations.
Power
Your unit and its recommended accessories are designed and tested to meet strict safety
requirements.
•The unit is designed to connect to a power source using the specific power cord type shipped
with the unit.
•Always plug the unit power cord into a protective earth grounded electrical outlet conforming to
national and local electrical codes. If the unit is not grounded properly, parts such as knobs and
controls can conduct electricity and cause serious injury.
•Do not bend the power cord excessively, step on it, or place heavy objects on it.
•A damaged cord can be a shock or fire hazard. Never use a power cord if it is damaged or
altered in any way.
•Use only approved accessories. Do not modify system components. Any alterations or
modifications to your unit not explicitly authorized by the manufacturer can be dangerous and
will void your warranty.

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INTRODUCTION
CONTACTING ASSISTANCE
Phone hours for Technical Support are 6 am – 4:30 pm Pacific Coast Time (west coast of the United
States, UTC -8), Monday – Friday. Please have the following information ready when calling or
emailing Technical Support: the model number, serial number,part number, and part ID (see page
15).
EMAIL: [email protected]
PHONE: [phone]
FAX: [phone]
Cascade TEK Solutions LLC
300 N 26th Avenue
P.O. Box 625 Bldg B
Cornelius, OR 97113
ENGINEERING IMPROVEMENTS
Sheldon Manufacturing continually improves all of 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 differs from those described in this manual, please contact your Cascade TEK dealer or
customer service representative for assistance.

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INTRODUCTION
VACUUM SUPPLY REQUIRED
The oven does not come with a vacuum pump. A pump must be separately purchased for
the oven.
Use of an oil trap plumbed on the vacuum line between the oven and the pump is strongly
recommended. The trap protects the pump from any oils outgassed during your baking
procedure. This extends the life of the pump. All maintenance and instructional information
should be obtained from the pump manufacturer if not shipped with the pump. Use of
clamps to secure vacuum tubing is also recommended.
Consult a vacuum pump specialist to determine the pump type best suited to your baking
application. The correct selection of a vacuum pump is critical for evacuating the chamber to
the level required for your vacuum baking applications in a timely manner. The nature of the
sample or product being heated should drive the selection of the pump, including the types
of chemicals outgassed during the baking process. Common pump types include Chemical
Duty PTFE Dry, Standard Duty Dry, Compact Direct-Drive, and specialty pumps for Corrosive
gases. Selection of an application-specific pump can improve the overall oven performance
and minimize pump maintenance costs.
For the chamber to seal, the vacuum pump must be able to evacuate at least 1 cubic foot per minute
(cfm) for each cubic foot of oven chamber volume (CuFt).
Model Chamber Capacity Min. Pump Capacity CFM Min. Pump Capacity LPM
TVO-2 1.67 CuFt 2 cfm 57 Liters per Minute
TVO-5 4.50 CuFt 5 cfm 142 Liters per Minute
Cascade TEK recommends evacuating the oven to 500 torr as part of the first step in a baking recipe
to verify the oven is sealed. This helps safeguard the oven and pump.
Building
Vacuum Supply
Vacuum Pump

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INTRODUCTION
GASKETS
Gaskets are non-warranty, high-wear consumable items subject to compression forces, heat, and
outgassed byproducts. Heavy usage rates may necessitate frequent replacements. The manufacturer
strongly recommends keeping a spare gasket on hand during operation.
Each oven comes with a replaceable silicone gasket installed on the chamber liner. This gasket seals
against the chamber door to maintain the vacuum integrity of the chamber. The gasket must be
replaced periodically and is rated to 230°C. It is vulnerable to acids and solvents. The manufacturer
also offers for sale Viton®, fluorosilicone, and Buna-N gaskets. See page 60 for information on gasket
type suitability for baking applications.
These ovens do not require vacuum grease.