Forced Air Ovens 230 Voltage Installation and Operation Manual SMO14-2, SMO28-2 Previously designated as FX14-2, FX28-2
SMO Forced Air Ovens 230 Voltage Previously designated FX Forced Air Ovens Installation and Operation Manual Part number (manual): 4861581 Revision: April 29, 2014 These units are TÜV CUE listed as 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 have been tested to the following requirements: CAN/CSA C22.2 No.
TABLE OF CONTENTS INTRODUCTION........................................................................................................................................... 4 General Safety Considerations ................................................................................................................. 4 Engineering Improvements ....................................................................................................................... 4 Contacting Assistance .........................
INTRODUCTION Thank you for purchasing a Sheldon Manufacturing SMO Forced Air 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.
INTRODUCTION (CONTINUED) CONTACTING ASSISTANCE If you are unable to resolve a technical issue with your 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 (see page 6). EMAIL: tech@shellab.
RECEIVING YOUR OVEN Before leaving our factory, all SMO 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 SMO oven, inspect it for concealed loss or damage to its interior and exterior.
GRAPHIC SYMBOLS The oven is provided with multiple graphic symbols on the control panel and adjacent to the power inlet. The symbols identify hazards and the functions of the adjustable components, as well as important notes in the user manual. 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.
GRAPHIC SYMBOLS (CONTINUED) Symbol Definition Indicates the timer Indique le minuterie Start or Stop the Timer Lancer ou arrêter le minuteur Reset the Timer Réinitialisation de la Minuterie Indicates: Caution hot surface Indique: Avertissement symbole de surface chaude 8|Page
CONTROL PANEL OVERVIEW Figure 1: Control Panel SMO14-2 and SMO28-2 Power Switch The main power switch on the control panel (green lighted I/O) controls all power to the unit and must be in the I (ON) position before any systems are operational. The switch will be lighted when in the I (ON) position. Timer Switch The black I/O switch marked TIMER is located to the right of the power switch. It controls the power to the timer circuit. In the OFF position oven heating has no timed duration.
CONTROL PANEL (OVERVIEW) Main Temperature Control Marked SET TEMPERATURE, this control consists of a green LED numerical display and an UP / DOWN arrow pad used for inputting set point temperatures and calibration offsets. Heating Activated Light The green pilot light labeled HEATING ACTIVATED illuminates whenever the oven heating elements are receiving power.
INSTALLATION Installation of the unit requires permanent connect wiring (commonly known as hardwiring) and should be performed by a qualified electrical technician. All other steps can be performed by the end user. This oven is intended for use indoors, at room temperatures between 15C and 30C (59F and 86F), at no greater than 80% Relative Humidity (at 25C / 77F).
INSTALLATION (CONTINUED) POWER SOURCE These ovens are intended for a 230 volt, 50/60 Hz application at the following amperages: 12 Amp SMO14-2; 20 Amp SMO28-2. Check the oven’s data plate to verify voltage and ampere requirements before connecting to a power source. The oven’s power feed must be wired into an earth grounded source. Position the oven so the enduser has access to the power feed disconnect.
INSTALLATION (CONTINUED) SHELVING INSTALLATION SMO Oven Shelf Installation Perform the following steps to install the SMO shelves: 1. Install the shelf clips in the slots located on the sides of the chamber interior, front and back. 2. Squeeze each clip, insert the top tab first, and then the bottom tab using a rocking motion. 3. Hang the metal shelves from the clips.
INSTALLATION (CONTINUED) CLEANING The oven interior was cleaned at the factory but not sterilized. See the Cleaning topic in the User Maintenance section for more information. BURN IN The oven should be run through a burning in process before being used for normal operations. This is done to eliminate smoking from the protective coatings on the oven’s heating elements. Please see the Burn In procedure in the Operation Section.
OPERATION OPERATING PRECAUTIONS Warning: The SMO oven is not an explosion proof unit! The oven is not designed to safely contain combustible gasses. Do not place explosive, combustible, or flammable materials into the chamber. 1. The bottom surface of the chamber should not be used as a work surface 2. Do not operate the oven in an environment with noxious fumes. 3. The SMO oven is provided with dampered intake and exhaust vents. For safe and efficient oven operation follow these precautions: a.
OPERATION (CONTINUED) BURN IN: FIRST USE The steps below will help to eliminate smoking from the heating elements’ protective coatings. 1. If you have not already done so, turn the Over Temperature Control knob all the way clockwise to its maximum setting. 2. Open the unit’s exhaust vents. It is recommended that the oven’s exhaust be positively vented outside of the oven’s workspace during the Burn In. 3. Set the oven’s Temperature Controller to 200°C by doing the following. 4.
OPERATION (CONTINUED) Note: Allow the oven to heat to up the set point, and then stabilize there with no change in the temperature reading for at least a half hour (30 minutes) prior to performing a Temperature Calibration. This is to ensure the best possible temperature uniformity in the oven chamber. Note: The open / close position of the dampered vents will affect the temperature performance of the oven when performing a calibration.
OPERATION (CONTINUED) 11. If the temperature readings of the display and the independent temperature device still do not match or fall close enough to be acceptable by your laboratory protocol after three calibration attempts, contact Sheldon Technical Support for assistance. SETTING THE OVER TEMPERATURE LIMIT CONTROL Perform the below steps to set the Over Temperature Limit Control feature: 1. Turn the Set Over Temperature Limit control dial clockwise to the maximum position, if it’s not already there.
OPERATION (CONTINUED) SETTING THE TIMER This procedure enters a timed heating cycle into the Timer. The cycle will run the oven for a set time, at the currently programed temperature set point. The oven will stop heating once the heating cycle is finished. Figure 1: Order of Time Value Entry for the Heating Cycle Timer Note: When the Timer is on, the heating elements will de-energize and not heat until either a timed heating cycle is initiated, or the Timer is turned off. 1.
OPERATION (CONTINUED) ACTIVATING THE HEATING CYCLE Note: The oven may be run in a timed heating cycle after a temperature set point has been set, the oven has been calibrated at that set point, and a heating cycle time period has been entered in the Timer. 1. Turn on the Time by pressing the black Timer switch. 2. Press the Start/Stop T button. 3. The oven will now heat to and run at the user-selected temperature set point for the duration of the user-selected heating cycle time period. 4.
USER MAINTENANCE Warning: Prior to any maintenance or service on this unit, disconnect the power feed from the power supply. Avertissement: Avant d'effectuer toute maintenance ou entretien de cet appareil, débrancher le cordon secteur de la source d'alimentation. If a hazardous material/substance has spilled in the oven, immediately initiate your site’s Hazardous Material Spill Containment protocol. Contact your local Site Safety Officer and follow instructions per the site policy and procedures.
MAINTENANCE (CONTINUED) Periodically, inspect the door latch, trim, catch, and gasket for signs of deterioration. Failure to maintain the integrity of the door system shortens the life span of the Oven. Electrical components do not require maintenance. If the oven fails to operate as specified, please contact your Shel Lab distributor or Sheldon Manufacturing Technical Support for assistance.
UNIT SPECIFICATIONS These ovens are 230 voltage units. Please refer to the oven’s data plate for individual electrical specifications. Technical data specified applies to units with standard equipment at an ambient temperature of 25°C and a voltage fluctuation of ±10%. The temperatures specified are determined in accordance to factory standard following DIN 12880 respecting the recommended wall clearances of 10% of the height, width, and depth of the inner chamber.
UNIT SPECIFICATIONS (CONTINUED) SHELF CAPACITY BY WEIGHT Model Per Shelf Total SMO14-2 (FX14-2) 75lbs / 34kg 225lbs / 102kg SMO28-2 (FX28-2) 75lbs / 34kg 450lbs / 204kg TEMPERATURE Model Range Uniformity Stability SMO14-2 (FX14-2) Ambient. +15 to 260C + 3.0 @ 150C ± 0.2C SMO28-2 (FX28-2) Ambient +15 to 260C + 3.5 @ 150C ± 0.
PARTS LIST PARTS Description Parts Number Adjustable Feet 2700506 Shelf Clip 1250512 Shelf SMO14-2 (FX14-2) and SMO28-2 (FX28-2) 995-00006 25 | P a g e
