Despatch Stackable LCC/LCD - Manual (Page 34)

A SSEMBLY & S ETUP Stackable LCC/LCD Oven Owner’s Manual
34 Version 26
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.
4.3.1.3. Recommended HEPA Filter Burn-Off Process
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.
b. If the equipment is large and the exhaust stack is a permanent service connection,
connect the equipment and exhaust stack before the burn-off process.
c. If the equipment is small with no permanent exhaust duct required, arrange a
temporary connection out of the clean area that will handle the maximum
temperature of the equipment. Direct the smoke and odor outside, or to a highly
ventilated area.
2. Set the temperature control at the maximum process temperature.
a. Silicone: Ramp at 1.25°C/min to 260°C and soak for 48 hours.
b. Media Pack: Ramp at 1.25°C/min to 260°C and soak for 48 hours.
c. Termikfil (Figure 12):
i. Option 1: Ramp at 1.7°C/min (or up to 5°C/min) to 350°C and soak for 48
hours.
ii. Option 2: Ramp to process temperature and soak for three consecutive three-
hour segments over 48 hours.

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.
24 hours
24 hours
Process
Temperature
Option 1
Option 2
48 hours
48 hours
Temperature Ramp 1.7°C/min up
to 5°C/Min
Temperature
Ramp 1.7°C/
min
Figure 12. Options for Starting Termikfil 2000 Filter.