Cascade TEK TVO-2 User manual

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

2 | Page
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

3| Page
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

4 | Page
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

5| Page
Power...................................................................................................................................................................................... 58
REPLACEMENT PARTS LIST.................................................................................................................................. 59
Replacement Gaskets........................................................................................................................................................ 60

6 | Page
TABLE OF CONTENTS

7| Page
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.

8 | Page
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.

9| Page
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

10 | Page
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.

11 | Page
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.
•Save the shipping carton until you are certain that the unit and its accessories function properly.
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.
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 depiction on the next page as a
reference.
5. The unit should come with an Installation and Operation Manual and a profile programming
guide.
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 Power Cord Leveling Feet
2 1 1 4
TVO-5 Shelves Shelf Clips Power Cord Leveling Feet
3 12 1 4

12 | Page
Figure
1: TVO-5
RECEIVING YOUR OVEN
ORIENTATION PHOTOS
Back of Unit: Vacuum Port, Vent
Port, Data Ports (See page 14)
Main Control Panel
Vacuum Control Panel and Display
Access Port
(KF-25 Fitting)
Chamber Door
Chamber
Gasket Seal
Oven Chamber
Shelf Standard Rail
Temperature
Sensor Probe

13 | Page
Figure
2: TVO-2
RECEIVING YOUR OVEN
Short Shelf
(Bottom)
Tall Shelf
Access Port
(KF-25 Fitting)
Tall Shelf
Chamber Door
Back of Unit: Vacuum Port, Vent
Port, Data Ports
Chamber
Gasket Seal
Main Control Panel
Vacuum Control
Panel and Display

14 | Page
RECEIVING YOUR OVEN
Back of Ovens
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 Data Port - 25 Pin
Power Cord
Inlet
Fuse Holder
9-Pin Voltage Output Port
Data Plate

15 | Page
RECEIVING YOUR OVEN
RECORD THE DATA PLATE INFORMATION
The data plate contains the unit model number, serial number,part number, and part ID. Tech
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:

16 | Page
RECEIVING YOUR OVEN

17 | Page
INSTALLATION
INSTALLATION PROCEDURE CHECKLIST
For installing the oven in a new workspace location.
Pre-Installation
Verify that a vacuum supply source suitable for your application is available
and can be connected to the oven, page 9.
•See page 23 for the oven gas and vacuum port locations.
Check that the required ambient conditions for the unit are met, page 18.
Check that the spacing clearance requirements are met, page 18.
•Unit dimensions may be found on page 57.
Check that a suitable electrical outlet and power supply is present, page 19.
Install the oven in a suitable workspace location
Review the lifting and handling instructions, page 19.
Install the unit leveling feet, page 20.
Install the oven in its workspace location, page 20.
Set up the oven for use
Clean the oven shelving. Clean the chamber if needed, page 20.
Install the shelving in the oven chamber, page 21.
Connect the oven to its vacuum supply source along with any optional backfill gas
supply, page 23.

18 | Page
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). 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 adversely
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 air flows for ventilation and cooling.
6 inches (152 mm) of clearance is required on the sides.
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 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-2: 20.5” (521 mm)
TVO-5: 27.0” (686 mm)

19 | Page
INSTALLATION
POWER SOURCE REQUIREMENTS
When selecting a location for the unit, verify each of the following requirements is satisfied.
Power Source: The wall power outlet must meet the power requirements listed on the unit data
plate.
Model AC Voltage Amperage Frequency
TVO-2 110 – 120 10.0 50/60 Hz
TVO-5 110 – 120 13.0 50/60 Hz
•Wall power sources must be protective earth grounded and single phase.
•Wall power sources must conform to all national and local electrical codes.
•Supplied voltage must not vary more than 10% from the data plate rating. Damage to the unit
may result if the supplied voltage varies more than 10%.
•The recommended wall circuit breakers for these units are 15 amps.
•Use a separate circuit to prevent loss of product due to overloading or circuit failure. The circuit
must match or exceed the amperage requirement listed on the unit data plate.
Power Cord: The unit must be positioned so that all operators can quickly unplug the oven in the
event of an emergency.
•The unit comes provided with a 125 volt, 15 amp, 9ft 5 in (2.86m) NEMA 5-15P power cord.
Fuses: These units each ship with a 16 amp 250V 5x20mm fuse installed in a fuse holder
immediately adjacent to the power cord inlet.
•The fuse must be installed and intact for the unit to operate.
•Always find and fix the cause of a blown fuse prior to putting the unit back into operation.
LIFTING AND HANDLING
The oven is heavy. Use appropriate 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.
•Restrain the oven completely while lifting or transporting so it cannot tip.
•Remove all removable parts, such as shelves and trays, and lock doors in the closed position
during transfers to prevent shifting and damage.
Standard 15-
amp NEMA
5-15 power
outlet.

20 | Page
INSTALLATION
LEVELING
The unit must be level and stable for safe operation.
Install the 4 leveling feet in the 4 corner holes in the bottom of the oven.
Note: To prevent damage when moving the unit, turn all 4 leveling feet so that the leg of each foot
sits inside the unit.
INSTALL THE OVEN
Install the unit in a workspace location that meets the criteria discussed in the previous entries of the
Installation section.
•Do not connect the oven to its power source at this time.
INSTALLATION CLEANING
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 prior to cleaning
and installation. Do not clean with deionized water.
See the Cleaning topic in the Operator Maintenance section (see page 43) for more information on
how to clean the oven chamber and shelving.