Despatch Stackable LCC/LCD - Manual (Page 17)

Stackable LCC/LCD Oven Owner’s Manual T HEORY OF O PERATION
Version 26 17
Copyright © 2010 by Despatch Industries.
All rights reserved. No part of the contents of this manual may be reproduced, copied or transmitted in any form or by any
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retrieval systems without the written permission of Despatch Industries, unless for purchaser's personal use.
3.3. HEPA Filters
The Stackable LCC/LCD Ovens use HEPA (High Efficiency Particulate Air) filters limit
particulate size in the work chamber to 0.3 microns or less.
3.3.1. Definitions
Binder: Organic substance used in filter construction to provide the media with
structural strength
Burn-Off: Process for eliminating the binder and D.O.P. contained in the filter from
the manufacturing and testing function.
D.O.P.: Dioctyl Phthalate - Aerosol particles of submicron size used in testing phase
to spot defects or measure filter efficiency.
HEPA: High Efficiency Particulate Air
3.3.2. Filter Packaging, Shipping and Handling
Packaging practice varies among the filter unit
manufacturers. Filter units are typically packaged in
cardboard cartons with varying approaches for
strengthening the container and making it impact-resistant.
Shipping cartons are typically marked with a vertical arrow
and "This Side Up" (Figure 3). A filter unit is placed in the
carton so the pleated folds are vertical (running from top to
bottom), versus side to side.

LCC oven chamber temperature transitions must not exceed
1.5°C/minute to maintain class 100 chamber conditions. For ramp
rates greater than 1.5°C/minute and up to 5°C/minute, the LCD model
will maintain class 100 chamber conditions.

Ship, handle, store and install HEPA filters with pleats positioned
vertically. Horizontally-positioned pleats risk breaking at the adhesive
line of the filter medium. Horizontally-positioned pleats also collect
entrapped material on “shelves.” The accumulated weight of the
entrapped material may cause sag and lead to early failure of the filter
unit.
THIS SIDE UP
Figure 3. This Side Up Graphic.