Sheldon High-Performance Oven 230 Voltage Installation and Operation Manual SMO5HP-2 Previously designated as HF4-2
Sheldon Manufacturing Oven High Performance 230 Voltage Installation and Operation Manual Part Number (Manual): 4861706 Revision: July 28, 2014 Purge Valve The SMO5HP-2 can be built with a purge valve located on the back of the unit. The valve can be connected to a cylinder of nitrogen (N2) or other neutral gas to purge the oven chamber. This option must be ordered prior to the construction of the oven.
TABLE OF CONTENTS General Safety Considerations ................................................................................................................. 4 Engineering Improvements ....................................................................................................................... 5 Contacting Assistance ............................................................................................................................... 5 RECEIVING YOUR OVEN .............................
INTRODUCTION Thank you for purchasing a Sheldon Manufacturing High Performance 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) 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.
RECEIVING YOUR OVEN Before leaving our factory, all High Performance 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.
RECEIVING (CONTINUED) ORIENTATION Permanent Connect Wire Braid 14 gauge, 6 inches (15 cm) Back Panel Fuse Holders External Power Outlet Nitrogen Gas Inlet (Optional Order Item) Note: The external power outlet type varies by country and voltage.
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. 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.
INSTALLATION Installation of an SMO5HP-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).
INSTALLATION (CONTINUED) LEVELING The oven must be level and stable for safe operation. Each high performance 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.
INSTALLATION (CONTINUED) SHELVING INSTALLATION The horizontal airflow within the chamber moves from the right-wall chamber duct to the large holes on the left side. Place the shelves so they do not obstruct the duct holes on the left in order to maximize airflow across the shelf space. 1. Install shelf slide hangers on opposites of the oven by inserting the slider’s tabs into the chamber’s mounting slots, then pushing down gently to secure the slider. 2. Hang the shelf from the two installed sliders.
CONTROL PANEL OVERVIEW Figure 3: Control Panel Power Switch The main power switch on the control panel (green lighted I/O) controls all power to the oven. It must be in the illuminated I (ON) position before any systems or components are operational. Temperature, Profile, and OTL Controller The temperature controller for the oven is labeled TEMPERATURE AND HIGH LIMIT CONTROL and consists of a Watlow EZ-Zone Controller.
CONTROL PANEL OVERVIEW (CONTINUED) Vent Valves The SMO5HP-2 comes provided with two vent valve controls on its front control panel. These open or close the intake and exhaust valves located on the top of the unit. Fuses The SMO5HP-2 is provided with two (2) 20 amp fuses. These are located in holders adjacent to the power feed braid on the back power panel of the unit. Please see the Orientation photo on page 7. The fuses protect against overcurrent conditions related to the operation of the oven.
OPERATION OPERATING PRECAUTIONS Warning: The SMO5HP-2 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 SMO5HP-2 not designed for use in Class I, II, or III locations as defined by the US National Electric Code. 2. Do not operate the oven in an environment with noxious fumes. 3. Outgassed byproducts maybe hazardous to or noxious for operating personal.
OPERATION (CONTINUED) Airflow and Applications During normal operations an internal blower fan motor pulls air in through the intake vent. The captured air is blown across heating elements and then forced down through a duct on the right side of the oven chamber. Upon leaving the duct, the heated air blows horizontally across the shelf space, helping to create temperature uniformity and enhance drying.
OPERATION (CONTINUED) SET THE OVER TEMPERATURE LIMIT This procedure sets the Over Temperature Limit backup system. This is typically 5°C above the set point temperature you will be using during your application or process, or 5°C above the hottest temperature of your heating profile. Note: If this is the first use of the oven, set the Over Temperature Limit to 325°C to prepare for the Burn In procedure. This helps ensures the OTL system will not interfere with the Burn In procedure. 1.
OPERATION (CONTINUED) FIRST USE BURN IN The steps below will help to eliminate smoking from the heating elements’ protective coatings when running above 150°C. Perform the burn-in at the highest temperature the oven will be used at. 1. Open the unit’s intake and exhaust vents. The oven’s exhaust should be positively vented outside of the oven’s workspace during the Burn-In. 2.
OPERATION (CONTINUED) Note: The accuracy of the calibration process is limited by the accuracy of your reference temperature device. The difference between the reference device and oven’s display is called an offset. Examples of offsets: Note: Reference Sensor Reading Watlow Temp. Display Offset Value 152°C 150°C 2 148°C 150°C -2 If the door was opened to check the reference device’s reading, allow the oven temperature ten minutes to stabilize before entering the offset. 9.
OPERATION (CONTINUED) CLOSED VENTS The oven can be run with the exhaust vent closed if required for your application or process. However, running the oven with a closed exhaust will likely decrease drying efficiency in the chamber. OVER TEMPERATURE LIMIT ACTIVE When the oven chamber air temperature exceeds the user-programed Over Temperature Limit, the OTL system will depower the heating elements. This is normally accompanied by a loud “click.” The display will flash two (2) alternating alert screens.
OPERATION (CONTINUED) PROGRAMMED OPERATIONS The Watlow controller can hold four (4) ten-step heating profiles. Additionally, profiles may be combined by programing profile steps sequentially to run as a single profile of between two (2) and forty (40) steps. Please see the Programing Guide – Watlow EZ-Zone Controller Heating Profiles document, which comes included with the SMO5HP-2 oven, for instructions on how to program heating profiles.
OPERATION (CONTINUED) Activating and Deactivating the Power Exhaust To activate the power exhaust as part of a heating profile step, do the following: 1. While selecting the parameters for the step, choose Event 1 On (“Ent1” “on”). a. The Event 1 parameter is located after the Time parameter when scrolling through a step menu using the green Advance Key. b. Use either of the Arrow Keys to toggle “oFF” to “on”. 2. Press the Advance key to scroll to the next event and save Event 1 as On. 3.
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) DOOR LATCH AND ELECTRONICS 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.
MAINTENANCE (CONTINUED) REMOVING THE CHAMBER LINER This procedure removes the ceiling liner and the side wall air ducts. The liner and ducts should be removed periodically and cleaned, and the surfaces beneath them cleaned. Note: Door removed in illustrations for clarity. Do not remove the door from the oven. 1, 2, 3) Remove Shelves, Nuts, and Door Gasket 1. Remove all shelves and shelf sliders from the oven. 2. Unscrew the nuts located at the top of the back wall of the oven chamber.
UNIT SPECIFICATIONS The SMO5HP-2 is a 230 voltage unit. Please refer to the oven’s data plate for individual electrical specifications. Technical data specified applies to ovens 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) TEMPERATURE All temperature performance data for 25°C ambient conditions Range Uniformity Stability Ambient + 15 to 300C + 1.7C @ 110 0.1°C Heat Up Time to 110°C Heat Up Time to 180°C* 10 minutes 35 minutes Recovery to 110°C* 4 minutes after closing the door AIRFLOW PERFORMANCE Airflow performance data is for both the intake and exhaust vents fully open. Cubic Feet Per Minute Cubic Liters Per Minute Air Exchanges Per Minute 6.2 175.56 1.
REPLACEMENT PARTS Description Parts Number Adjustable Feet SMO5HP-2 2700512 Chamber Gasket Silicone (unit is per foot, requires 8 feet) 3750626 Door Gasket SMO5HP-2 Silicone (unit is per foot, requires 11 feet) 3450587 Fuse 20 Amp 3300538 Shelf Slide SMO5HP-2 5121189 Shelf SMO5HP-2 512195 Power Exhaust Blower Unit 230 Volt 9990741 ORDERING PARTS AND CONSUMABLES If you have the Part Number for an item, you may order it directly from Sheldon Manufacturing by calling 1-800-322-4897 extension 1.
