Hepa Filter Burn-Off - Despatch LCC Series Owner's Manual

C244, 320207, REV B

5.3.3. HEPA Filter Burn-Off

5.3.3.1. HEPA Filter Burn-Off Process
The burn-off process takes place in any equipment where a new HEPA filter is
used at temperatures above 180°C (356°F). Expect smoke, possibly a pungent
odor and a light residue on interior surfaces. This results from oxidation of the
binder. Most of the binder will leave the filter after running at a temperature of
260°C (500°F) for 48 hours. Check the oven for particles or the exhaust for smoke
and odor to determine that the process is finished.
While the high-temperature filter has undergone tempering

treatment at the factory, smells and/or fumes may be released
during the first use at temperature.
5.3.3.2. Location of HEPA Filter Burn-Off Process
Select a location for the burn-off process where generated smoke and odor will
be ventilated with the least amount of interruption and inconvenience. Ideally
this will be in the final location for the oven. However, it may be a receiving dock,
some well-ventilated space or even outside if the weather is acceptable. If this
location is a very clean area, pay special attention to an exhaust hook-up that fully
captures the smoke and odor produced. The post burn-off cleaning (that is, oven
wipe down) may also generate dust.
5.3.3.3. Recommended HEPA Filter Burn-Off Process
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.
1. Locate the equipment exhaust opening where chamber air is being
expelled.
a. If the oven filter is burned off in a clean area, be sure to handle the
equipment exhaust appropriately.
48 of 82 ©2021 ITW EAE. All rights reserved. Despatch is a registered trademark in the U.S. and other
countries. No part of the contents of this manual may be reproduced, copied or transmitted in any form
or by any means without the written permission from ITW EAE - Despatch, unless for purchaser's
personal use.
LCC_LCD1-16/51 Oven Owner's Manual