Hepa filter handling and inspection – Despatch LCC/LCD2-14-4 Oven Series with Protocol 3 User Manual

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SSEMBLY

ETUP

LCC/LCD2-14 Series Oven

Owner’s Manual

Version 1

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retrieval systems without the written permission of Despatch Industries, unless for purchaser's personal use.

4.3.1. HEPA Filter Handling and Inspection

1. Remove new filter from carton



Sweep floor clear of nuts, bolts and other protrusions which
may damage the unit.

Do not drop or jar the filter carton.

a. Place carton on floor.
b. Tilt the carton on one corner. Handle the carton at opposing corners.
c. Remove sealing tape and fold back flaps of carton.
d. Gently upend the filter to place the exposed end of the filter on the floor. Do not jar the

filter.

e. Pull the carton from the filter unit. Be careful to not pull the filter from the carton.

2. Inspect the filter.

a. Visually inspect the new gasket (s) for damage during handling.
b. Use a strong lamp to examine the exposed areas of both faces for evidence of breaks,

cracks, or pinholes (Figure 12). If a strong lamp is unavailable, use a flashlight in a
darkened room.

c. Look for visible defects with the light projected along the full length of each channel

created by the separators. Translucent spots may
not necessarily indicate holes or cracks but may
simply be variations in thickness of the filter
medium.

d. Check that the adhesive seal around the filter unit

faces are complete and unbroken.

e. Check frame corner joints for adhesive sealing

and tightness.

f. Check that gaskets are cemented firmly to the

filter frame and that gasket pieces are undamaged
and butted or mated at the joints.

Notice

Do not attempt to repair the damaged filter unit

—particularly the

medium. Any unit so repaired must be retested to assure that
hidden damage does not exist which might reduce filtering
efficiency. Repair and retest is not economical for most users.

Figure 12. Example HEPA Filter
(Silicone-free)