Despatch Stackable LCC/LCD-4 - Manual (Page 18)

T HEORY OF O PERATION Stackable LCC/LCD Oven Owner’s Manual
18 Version 1.1
Copyright © 2012 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
means including graphic, electronic, or mechanical methods or photocopying, recording, or information storage and
retrieval systems without the written permission of Despatch Industries, unless for purchaser's personal use.
The filter is typically shipped in the original carton or package provide by the filter manufacturer.
This carton or package provides good storage and maximum protection from dirt and moisture.
Store and move HEPA filters upright in the shipping carton. Minimize handling of the filter.
During installation, remove the filter from the shipping carton and install directly into the oven.
If an unpackaged HEPA filter unit must be placed with its face on the floor or other surface, clear
the surface entirely of every object or irregularity which might damage the filter pack.
3.3.2. HEPA Filter Validation Testing
Despatch Industries guarantees the HEPA filters will meet specified efficiency ratings when the
following recommendations are followed:

The filter is properly installed

The filter is run at or below 200°C, at a constant temperature

The filter is run before burn-in
3.3.2.1. D.O.P. Testing
Caution!
Despatch does not recommend D.O.P. filter testing.
D.O.P. testing uses aerosol particles of submicron size to spot defects or measure filter efficiency.
Degenerative by-products of this test are distributed throughout the oven chamber upon heat-up.
Despatch does not recommend D.O.P. filter testing.
3.3.2.2. Class 100 Testing
Despatch guarantees a Class 100 environment within the oven. This classification is based on
measurement of the particulate level within the oven work chamber.

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.