User Manual

Stackable LCC/LCD Oven Owner’s Manual THEORY OF OPERATION

Version 1.1 17

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.

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. Two different types of filters are

typically used. While both filters are high-temperature filters in that they are designed for use in

thermal processing equipment, the “standard” HEPA filter is rated to 260°C ( 500°F) while the

“high-temperature” HEPA filter is rated to 350°C (662°F).



Each LCC/LCD oven uses one of two types of HEPA filters,

depending on the oven’s maximum temperature. Ovens that can

be heated to 260°C (500°F) use the Standard HEPA filter. Ovens

that can be heated to 350°C (662°F) use the High-Temperature

HEPA filter.

However, customers requiring a higher ramp rate while

operating equipment below 260°C (500°F) may still choose to use

the high-temperature HEPA filter:

 Standard HEPA filter ramp rate: 1.25°C (34.25°F)/minute

 High-Temperature HEPA filter ramp rate: 5°C

(41°F)/minute

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

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.

THIS SIDE UP

Figure 3. This Side Up Graphic.