Shellab SMO5CR-2 User Manual
Installation and
Operation Manual
SMO5CR-2
Previously designated as
CR1-2
Sheldon Clean Room Oven 230 Voltage
Sheldon Manufacturing Oven Clean Room 230 Voltage
Installation and Operation Manual
Part Number (Manual): 4861580
Revision: July 28, 2014
These units are forced air ovens for professional, industrial, or educational use where the
preparation or testing of materials is done at approximately atmospheric pressure and no
flammable, volatile, or combustible materials are being heated.
These units are compliant with the following standards:
CAN/CSA C22.2 No. 61010-1:2012
CAN/CSA C22.2 No. 61010-2-010 + R:2009
UL 61010A-2-010:2002
UL 61010-1:2012
EN 61010-1:2010
EN 61010-2-010:2003
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TABLE OF CONTENTS
General Safety Considerations ................................................................................................................. 4
Engineering Improvements ....................................................................................................................... 5
Contacting Assistance ............................................................................................................................... 5
RECEIVING YOUR OVEN ............................................................................................................................ 6
Inspecting the Shipment ............................................................................................................................ 6
Returning the Shipment ............................................................................................................................ 6
Recording Data Plate Information ............................................................................................................. 6
Orientation ................................................................................................................................................. 7
GRAPHIC SYMBOLS ................................................................................................................................... 8
INSTALLATION ............................................................................................................................................ 9
Ambient Conditions ................................................................................................................................... 9
Location ..................................................................................................................................................... 9
Lifting and Handling .................................................................................................................................. 9
Leveling ................................................................................................................................................... 10
Power Source .......................................................................................................................................... 10
Shelving Installation ................................................................................................................................ 11
Cleaning .................................................................................................................................................. 11
Burn In ..................................................................................................................................................... 11
CONTROL PANEL OVERVIEW ................................................................................................................. 12
OPERATION ............................................................................................................................................... 14
Operating Precautions ............................................................................................................................ 14
Theory of Operations .............................................................................................................................. 14
Setting up the Oven ................................................................................................................................ 15
Set the Over Temperature Limit .............................................................................................................. 16
Set the Temperature Controller Set Point ............................................................................................... 16
HEPA Filter Burn-In ................................................................................................................................. 17
Calibrating the Unit For Your Application ................................................................................................ 19
Closed Vents ........................................................................................................................................... 21
Over Temperature Limit Active ............................................................................................................... 21
Positive Venting of Exhaust .................................................................................................................... 22
USER MAINTENANCE ............................................................................................................................... 24
Cleaning .................................................................................................................................................. 24
Disinfecting .............................................................................................................................................. 24
Door Latch and Electronics ..................................................................................................................... 25
Door Gaskets .......................................................................................................................................... 25
HEPA Filter Lifespan ............................................................................................................................... 25
Replacing the HEPA Filter Assembly ...................................................................................................... 26
UNIT SPECIFICATIONS ............................................................................................................................. 28
Weight ..................................................................................................................................................... 28
Dimensions .............................................................................................................................................. 28
Capacity .................................................................................................................................................. 28
Shelf Capacity by Weight ........................................................................................................................ 28
Temperature ............................................................................................................................................ 29
Airflow Performance ................................................................................................................................ 29
Power ...................................................................................................................................................... 29
REPLACEMENT PARTS ............................................................................................................................ 30
Ordering Parts and Consumables ........................................................................................................... 30
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INTRODUCTION
Thank you for purchasing a Sheldon Manufacturing Clean Room Oven. We know that in today’s
competitive marketplace, customers have many choices when it comes to constant temperature
equipment. We appreciate you choosing ours. Our continued reputation as a leading laboratory
product manufacturer rests with your satisfaction. Sheldon Manufacturing, Inc. stands behind our
products, and we will be here if you need us.
These ovens are intended for professional, industrial, and educational clean room applications
requiring horizontal shelf space airflows. The ovens are not designed for use at hazardous or
household locations.
Before you use your oven read this entire manual carefully to understand how to install, operate,
and maintain the oven in a safe manner. Keep this manual available for use by all oven operators.
Ensure that all operators are given appropriate training before the oven begins service.
GENERAL SAFETY CONSIDERATIONS
Note: Failure to follow the guidelines and instructions in this manual may create a protection
impairment by disabling or interfering with the unit’s safety features. This can result in injury
or death.
Your oven and its recommended accessories have been designed and tested to meet strict safety
requirements. For continued safe operation of your oven, always follow basic safety precautions
including:
Follow all local or regional ordinances in your area regarding the use of this unit. If you
have any questions about local regulations, please contact the appropriate agency.
Use only approved accessories. Do not modify system components. Any alterations or
modifications to your oven may be dangerous and will void your warranty.
Always hardwire the unit’s power feed to an earth grounded electrical source that conforms
to national and local electrical codes. If the unit is not grounded, parts such as, knobs and
controls may conduct electricity and cause serious injury.
Avoid damaging the power feed. Do not bend it excessively, step on it, place heavy objects
on it. A damaged power feed can easily become a shock or fire hazard. Never use a power
feed after it has been damaged.
Do not position the equipment in such a manner as to make it difficult to disconnect or
uncouple the power feed.
Do not attempt to move the unit while in operation or before the unit has cooled.
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INTRODUCTION (CONTINUED)
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 Shel Lab dealer or
customer service representative for assistance.
CONTACTING ASSISTANCE
If you are unable to resolve a technical issue with the oven, please contact Sheldon Technical
Support. Phone hours for Sheldon Technical Support are 6am – 4:30pm Pacific Coast Time (west
coast of the United States, UTC -8).
Please have the following information ready when calling or emailing Technical Support: the model
number and the serial number. These will be found on the unit’s data plate, which is located on
the back of the unit at the top right, next to the power supply as mandated by regulatory
requirement.
EMAIL: tech@shellab.com PHONE: 1-800-322-4897 extension 2, or (503) 640-3000 FAX: (503)
640-1366
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Shelves (2)
Shelf Slides (4)
Leveling Feet (4)
Model Number
Serial Number
RECEIVING YOUR OVEN
Before leaving our factory, all Clean Room Ovens are packaged in high-quality shipping materials
to provide protection from transportation-related damage. When an oven leaves our factory, safe
delivery becomes the responsibility of the carrier. Damage sustained during transit is not
covered by the oven’s warranty. When you receive your High Performance Oven, inspect it for
concealed loss or damage to its interior and exterior. If you find any damage to the oven follow the
carrier’s procedure for claiming damage or loss.
INSPECTING THE SHIPMENT
Carefully inspect the shipping carton for damage. Report any damage to the carrier service that
delivered the oven. If the carton is not damaged, open the carton and remove the contents. The
unit should come with an Installation and Operation Manual, warranty card, a Certificate of
Compliance, and the Programming Guide – Watlow EZ-Zone Heating Profiles.
Verify that the correct number of shelves, shelf slides, and leveling feet have been included (see
the following table for quantities).
Included accessories
Carefully check all packaging before discarding. Save the shipping carton until you are certain that
the unit and its accessories function properly.
RETURNING THE SHIPMENT
If you must return the oven for any reason, first contact your service representative for a return of
material authorization (RMA). You must provide the unit’s data plate information. See Recording
Data Plate Information below.
RECORDING DATA PLATE INFORMATION
Locate the data plate on the back of the oven next to the power inlet. The data plate contains the
oven model number and serial number. Enter this information below for future reference.
Date Plate Information
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Figure 1: Orientation Photo
Fuse
Holders
External Power
Outlet
Nitrogen Gas
Inlet
Permanent Connect Wire Braid
14 gauge, 6 inches (15 cm)
Intake Vent
Exhaust Vent
Control Panel
Power Switch
Intake Vent Valve
Control
Exhaust Vent Valve
Control
Outer Door
Gasket
Chamber Ceiling
Liner
Right Wall
Chamber Liner
HEPA Filter
Assembly
Left Wall
Chamber Liner
Door Latch
Door Latch
Chamber Gasket
Note: The external
power outlet type
varies by country and
voltage.
RECEIVING (CONTINUED)
ORIENTATION
Back Panel
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Symbol
Definition
Indicates that you should consult your service manual for further instructions.
Indique que l'opérateur doit consulter le manuel d'utilisation pour y trouver les instructions
complémentaires.
Indicates Adjustable Temperature
Indique température réglable
Indicates AC Power
Repère le courant alternative
Indicates I/ON and O/OFF
I repère de la position MARCHE de l'interrupteur d'alimentation
O repère de la position ARRÊT de l'interrupteur d'alimentation
Indicates protective earth ground
Repère terre électrique
Indicates UP and DOWN respectively
Touches de déplacements respectifs vers le HAUT et le BA
Indicates a Potential Shock Hazard
Signale danger électrique
WEEE Directive compliant logo
Indicates the unit should be recycled (Not disposed of in land-fill)
Indique l’appareil doit être recyclé (Ne pas jeter dans une décharge)
Indicates: Caution hot surface
Indique: Avertissement symbole de surface chaude
GRAPHIC SYMBOLS
The oven is provided with multiple graphic symbols on its external and internal surfaces. The
symbols identify hazards and the functions of the adjustable components, as well as important
notes found in the user manual.
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INSTALLATION
Installation of an SMO5CR-2 requires permanent connect wiring (commonly known as hardwiring),
and must be performed by a qualified electrical technician. All other installation steps can be
performed by the end user.
AMBIENT CONDITIONS
This oven is intended for use indoors, at room temperatures between 15C and 40C (59F and
104F), at no greater than 80% Relative Humidity (at 25C / 77F). Allow a minimum of 12 inches
(30cm) between the oven and any walls or partitions, and 24 inches (60cm) of vertical headspace
clearance above the top of the oven for unobstructed airflow and cooling. If the oven’s exhaust will
be vented from the workspace through a duct or other channeling, 12 inches (30cm) of vertical
clearance will suffice. Make sure the intake and exhaust vent remain unobstructed. Do not place
objects on top of oven, aside from the power exhaust accessory described in the manual.
Operating the unit outside these conditions may adversely affect the oven’s temperature
range, uniformity, and stability.
For conditions outside of those listed above, please contact your distributor or Shel Lab Sales to
explore other ovens suited to your production of laboratory environment.
LOCATION
When selecting a location to install the oven, consider all conditions that can affect temperature
performance. For example:
Ovens, autoclaves, and any device that produces significant radiant heat
Heating and cooling ducts, or other sources of fast moving air currents
High-traffic areas
Direct sunlight
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 moving parts, such as shelves and trays, and secure the door in the closed
position during transfers to prevent shifting and damage.
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INSTALLATION (CONTINUED)
LEVELING
The oven must be level and stable for safe operation. Each Clean Room Oven ships with four
leveling feet. Insert one leveling foot into each of the four holes in the bottom corners of the oven.
Stand the oven upright. Then, adjust the foot at each corner until the oven stands level and solid
without rocking. To raise a foot, turn it in a counterclockwise direction; to lower a foot, turn it in a
clockwise direction.
Note: To prevent damage when moving the oven, turn each of the four leveling feet completely
clockwise.
POWER SOURCE
The oven is intended for 230 volt, 50/60 Hz applications at 12 Amps.
Check the oven’s data plate to verify voltage and ampere requirements before wiring to a power
source.
The oven’s power feed must be wired into an earth grounded source. The oven comes provided
with an integral 6 inch (15 cm) wire braid of two 14 gauge high-temperature (300°C) hot wires and a
14 gauge earth ground. See the Orientation figure on page 7.
The power source for the oven 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 oven may
result if supplied voltage varies more than 10%.
Before energizing the oven it must be earth grounded using the protective conductor terminal
(green with yellow stripe wire. Do not remove the protective conductor (earth connection).
Removing the protective conductor will negate the oven’s protections against potentially dangerous
electric shocks and create a possible fire hazard.
A separate circuit is recommended to prevent possible loss of product due to overloading
or failure of other equipment on the same circuit.
A switch or circuit-breaker must be used in the building installation.
The required circuit-breaker is 20 Amps.
The wires for power source connection should be in accordance with the following for all
units: Green/Yellow – Earth; Black – Hot; Red – Hot.
The power feed Disconnect must be in close proximity to the equipment and within easy
reach of the operator.
The power feed Disconnect must be marked as the disconnecting device for the
equipment.
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