Cascade TEK TVO-2-2 User manual

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

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The TVO-2 and TVO-5 ovens require a 110 – 120-volt power outlet.
The TVO-2-2 and TVO-5-2 ovens require a 220 – 240 volt power outlet.
Warning: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 www.P65Warnings.ca.gov.
¡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.gov.
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.
Standard
CEE7/7
wall socket
Standard
NEMA 6-15R
wall socket
Standard
NEMA 5-15R
wall socket

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Vacuum Ovens
TVO-2, TVO-5: 110 – 120 Voltage
TVO-2-2, TVO-5-2: 220 – 240 Voltage
Part Number (Manual): 4861795
Revision: November 15, 2021
Cascade TEK Part ID Numbers:
Model
TVO-2
TVO-2-2
TVO-5
TVO-5-2
Part ID CTV222 CTV222-EA CTV522 CTV522-EA
The Part ID denotes the specific build version of the model.
Cascade TEK Solutions, LLC is an ISO 9001 certified manufacturer.
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. 61010-2-010:2015
UL 61010-1:2012
UL 61010-2-010:2015
EN 61010-1:2010
EN 61010-2-010:2014

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TABLE OF CONTENTS
INTRODUCTION .........................................................................................................................................................7
Read this Manual.................................................................................................................................................................... 7
Safety Considerations and Requirements ...................................................................................................................... 7
Contacting Assistance ..........................................................................................................................................................8
Manufacturing Warranty ......................................................................................................................................................8
Engineering Improvements..................................................................................................................................................8
Vacuum Supply Requirements ...........................................................................................................................................9
Oven Chamber Gaskets..................................................................................................................................................... 10
RECEIVING YOUR OVEN .........................................................................................................................................11
Inspect the Shipment............................................................................................................................................................ 11
Orientation Images .............................................................................................................................................................. 12
Dimension Visuals................................................................................................................................................................ 16
Record the Data Plate Information.................................................................................................................................. 18
INSTALLATION .........................................................................................................................................................19
Installation Procedures Checklist .................................................................................................................................... 19
Required Ambient Conditions.......................................................................................................................................... 20
Required Clearances.......................................................................................................................................................... 20
Power Source Requirements 110 – 120 Volts ............................................................................................................... 21
Power Source Requirements 220 – 240 Volts ........................................................................................................... 22
Lifting and Handling ........................................................................................................................................................... 23
Leveling.................................................................................................................................................................................. 23
Install the Oven .................................................................................................................................................................... 24
Installation Cleaning........................................................................................................................................................... 24
Shelving Installation............................................................................................................................................................ 25
Connect to the Vacuum Supply .......................................................................................................................................27
GRAPHIC SYMBOLS ............................................................................................................................................... 29
CONTROL OVERVIEW .............................................................................................................................................31
OPERATION.............................................................................................................................................................. 33
Operating Precautions....................................................................................................................................................... 33
Theory of Operation ........................................................................................................................................................... 34
Put the Oven into Operation ............................................................................................................................................ 36
Set the High Temperature Limit...................................................................................................................................... 38
Evacuating and Backfilling the Oven Chamber ......................................................................................................... 39
Setting the Constant Temperature Setpoint ................................................................................................................ 41
Temperature Programs ...................................................................................................................................................... 41
High Temperature Limit Activated ................................................................................................................................. 42
Changing the Unit of Measurement............................................................................................................................... 43
Vacuum Gauge Operations ............................................................................................................................................. 44
Maximum Obtainable Vacuum........................................................................................................................................ 45
Pressure Units Conversion Chart.................................................................................................................................... 45
Data Ports.............................................................................................................................................................................. 46
Oven Cooldowns ................................................................................................................................................................. 46
OPERATOR MAINTENANCE.................................................................................................................................. 47
Cleaning..................................................................................................................................................................................47
Maintaining Atmospheric Integrity ................................................................................................................................. 48
Electrical Components....................................................................................................................................................... 48
Vacuum Pump Maintenance............................................................................................................................................ 48
Storage................................................................................................................................................................................... 48
Heating Issues — Diagnostic Questionnaire............................................................................................................... 49
Vacuum Leak Issues – Diagnostic Questionnaire..................................................................................................... 54
UNIT SPECIFICATIONS ...........................................................................................................................................61
Weight...................................................................................................................................................................................... 61

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Dimensions............................................................................................................................................................................. 61
Capacity .................................................................................................................................................................................. 61
Shelf Capacity by Weight................................................................................................................................................... 61
Vacuum .................................................................................................................................................................................. 62
Temperature ......................................................................................................................................................................... 62
Power...................................................................................................................................................................................... 62
PARTS LIST............................................................................................................................................................... 63
Replacement Gaskets........................................................................................................................................................ 64

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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. Ensure all operators are given appropriate training before the unit
begins service. Keep this manual available for use by all operators.
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 Customer 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 Customer Support: the model number, serial number,part number, and part ID (see page
18).
[e-mail]
1-888-835-9250
1-971-371-4096
FAX: [phone]
Manufacturing and Customer Support
Cascade TEK Solutions, LLC
PO Box 625
300 N 26th Ave
Cornelius, OR 97113
USA
MANUFACTURING WARRANTY
For information on your warranty and online warranty registration please visit:
https://www.cascadetek.com/warranty/
ENGINEERING IMPROVEMENTS
Cascade TEK 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 REQUIREMENTS
Pump or Building System Required
The oven does not come with a vacuum pump. A pump must be separately purchased for the oven.
Required Flow Rate
For the chamber to seal, the vacuum pump or system 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-2s 1.67 CuFt 2 cfm 57 Liters per Minute
TVO-5s 4.50 CuFt 5 cfm 142 Liters per Minute
The use of clamps to secure vacuum tubing is recommended.
Minimum Evacuation Level
The oven must be evacuated to -3 inHg or lower for the oven chamber door to seal. The manufacturer
recommends pumping down below -3 inHg as part of the first step in a baking recipe to ensure a good
seal. This helps safeguard the oven and pump.
Pump Type Selection
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, and Compact Direct-Drive. The
selection of an application-specific pump can improve the overall oven performance and minimize pump
maintenance costs. All maintenance and instructional information should be obtained from the pump
manufacturer if not shipped with the pump.
Oil Trap Recommended
The 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.
Building Vacuum Supply
Vacuum Pump

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INTRODUCTION
OVEN CHAMBER GASKETS
Wear and Replacement
Chamber liner 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.
Included Chamber Gasket
Each oven comes with a replaceable silicone gasket installed on the chamber liner which seals the
oven chamber when the door is closed and the chamber is under vacuum. 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 64 for information on gasket
type suitability for baking applications.
Do Not Use Vacuum Grease
•These ovens do not require vacuum grease to seal.
•The use of grease may contaminate the chamber and samples and can foul vacuum pumps.
•Silicone vacuum grease will damage silicone gaskets.Do not use silicone grease with
silicone gaskets.

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RECEIVING YOUR OVEN
INSPECT THE SHIPMENT
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. When you receive
your unit, inspect it for concealed loss or damage to its interior and exterior. If you find any damage
to the unit, follow the carrier’s procedure for claiming damage or loss.
Save the shipping carton until you are certain that the unit and its accessories function properly.
1. Carefully inspect the shipping carton for damage.
2. Report any damage to the carrier service that delivered the unit.
3. If the carton is not damaged, open the carton and remove the contents.
4. Inspect the unit for signs of damage. See the orientation depictions on the next pages as a
reference.
5. The unit should come with an Installation and Operation Manual and a Temperature Program
Manual.
6. Verify the correct number of accessories has been included.
7. Carefully check all packaging for accessories before discarding.
Included Accessories:
TVO-2 Tall Shelves Short Bottom Shelf Leveling Feet
2
1
4
TVO-5 Shelves Shelf Clips Leveling Feet
3 12 4
Power Cords
Model NEMA 5-15P
125 Volt
NEMA 6-15P
240 Volt (US)
CEE 7/7
250 Volt (Euro)
TVO-2 1 0 0
TVO-5 1 0 0
TVO-2-2 0 1 1
TVO-5-2 0 1 1

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TVO
-5 and TVO-5-2
RECEIVING
ORIENTATION IMAGES
Main Control
Panel and Display
Vacuum Control
Panel and Display
Oven Chamber Door
Chamber
Gasket Seal
Shelf Standard Rail
Temperature
Sensor Probe
Shelf
Back of Units: See next page.
Leveling Foot

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RECEIVING
Back of TVO-5 and TVO-5-2
KF-25 Vacuum Port (Includes blank and clamp, not pictured here)
Vacuum Port, 3/8
inch (9.52 mm)
Chamber Vent
Inlet Port ¼ inch
(6.35 mm)
RS485 25 Pin Data Port
9-Pin Voltage Output Port
Power Cord Inlet
Fuse Holder(s)
•TVO-5: One holder
•TVO-5-2: Two holders
Data Plate
Power Panel Closeup
Power Panel

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TVO
-2 and TVO-2-2
RECEIVING
Short Shelf
(Bottom)
Tall Shelf
Temperature
Sensor Probe
Tall Shelf
Oven Chamber Door
Chamber
Gasket Seal
Main Control
Panel and Display
Vacuum Control
Panel and Display
Back of Units: See next page.

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RECEIVING
Back of TVO-2 and TVO-2-2
KF-25 Vacuum Port (Includes blank and clamp, not pictured here)
Vacuum Port, 3/8
inch (9.52 mm)
Chamber Vent
Inlet Port ¼ inch
(6.35 mm)
25-Pin RS485 Data Port
9-Pin Voltage Output Port
Data Plate
Power Cord Inlet
Power Panel Closeup
Power Panel
Fuse Holder(s)
•TVO-2: One holder
•TVO-2-2: Two holders

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RECEIVING
DIMENSION VISUALS
TVO-5s
See page 20 for the required ventilation clearances.
Shelf Width: 17.2 inches (437 mm)
Shelf Depth: 23.0 inches
(582 mm)
Width: 26.7 inches (679 mm)
Depth: 34.5 inches (877 mm)
Chamber Height: 18.1 inches (459 mm)
Chamber Width: 18.1 inches (459 mm)
Chamber Depth: 24.1 inches (612 mm)
Shelves
Height: 33.2 inches (844 mm)
Exterior
Interior

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RECEIVING
TVO-2s
See page 20 for the required ventilation clearances.
Width: 20.2 inches (513 mm)
Tall Shelves
Shelf Depth: 19.0 inches
(483 mm)
Chamber Height: 12.0 inches (304 mm)
Chamber Width: 12.0 inches (304 mm)
Chamber Depth: 20.0 inches (508 mm)
Height: 27.1 inches (689 mm)
Shelf Width: 11.3 inches (287 mm)
Depth: 30.8 inches (783 mm)
Exterior
Interior

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RECEIVING
RECORD THE DATA PLATE INFORMATION
The data plate contains the unit model number, serial number,part number, and part ID. Customer
Support will need this information during any support call. Record it below for future reference.
•The data plate is located on the back of the oven above the power inlet.
MODEL NO:
SERIAL NO:
PART NO:
PART ID:

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INSTALLATION
INSTALLATION PROCEDURES CHECKLIST
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 9.
•See page 27 for the oven gas and vacuum port locations.
Check that the required ambient conditions for the unit are met, page 20.
Check that the spacing clearance requirements are met, page 20.
•Unit dimensions may be found on page 61.
Check that a suitable electrical outlet and power supply is present, page 21.
Install the oven in a suitable workspace location
Review the lifting and handling instructions, page 23.
Install the unit leveling feet, page 23.
Install the oven in its workspace location, page 24.
Set up the oven for use
Clean the oven shelving. Clean the chamber if needed, page 24.
Install the shelving in the oven chamber, page 25.
Connect the oven to its vacuum supply source along with any optional backfill gas
supply, page 27.

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INSTALLATION
REQUIRED AMBIENT CONDITIONS
This oven is built for use indoors at 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). The ambient temperature should not change by
2°C (3.6°F) or more during operation.
Operating outside these conditions may adversely affect the oven temperature performance.
When selecting a location to install the unit, consider all environmental conditions that can impact its
temperature performance. These include:
•Proximity to other ovens, autoclaves, and any device that produces significant radiant heat
•Heating and cooling vents or other sources of fast-moving air currents
•High-traffic areas
•Direct sunlight
REQUIRED CLEARANCES
These clearances are required to provide airflows for ventilation and cooling.
6 inches (152 mm) of clearance is required on the sides.
12 inches (305 mm) of clearance is required between the back of the oven and any partition.
12 inches (305 mm) of headspace clearance is required between the top of the unit and any
overhead partitions. Do not place objects on top of the oven.
A KF-25 vacuum port is located on the back of the oven for introducing vacuum-rated thermocouple
feedthroughs into the chamber or connecting to an external vacuum supply source. Leave sufficient
clearance for the oven operators to safely access this port.
6” (152 mm)
Fan
KF-25 Port
6” (152 mm)
Door Swing
12” (305 mm)
12” (305 mm)
12” (305 mm)
6” (152 mm)
TVO-2s: 20.2” (513 mm)
TVO-5s: 26.6” (676 mm)