Envirco MAC 10 LE-DC - Manual (Page 14)

MAC 10
®
LEDC
4x4 Fan Filter Unit
14 Innovators in Clean Air Technology | www.envirco.com | Operation & Maintenance
I n s t a l l a t i o n & S e r v i c e M a n u a l
Plenum
Assm.
Diffuser
Screen
Screen
Screws
Filter
Caps
RSR/E Filter Change RSR/E Sheet Metal Filter Replacement
WARNING
DISCONNECT THE UNIT FROM THE ELECTRICAL
POWER SOURCE BEFORE ATTEMPTING
ANY SERVICE
WARNING
THE STANDARD FILTER IS PROTECTED WITH AN
EXPANDED METAL FACE SCREEN. THIS IS
NEVER TO BE USED TO HANDLE THE FILTER.
IT IS ONLY FOR PROTECTION AGAINST AN
ACCIDENTAL TOUCH OF THE FILTER.
ONLY HANDLE THE FILTER BY THE FRAME.
■ Service: Removal and Replacement of RSR/E Filters
Note: All filters should be visually inspected for freight damage before installation. Since the filters are 4’ x 4’ in dimension it
is necessary to use two workers when lifting the filter, and four workers for installation to avoid twisting or separation of the
media seals. Handle the filter only by the frame and never place anything on the upstream filter side of the filter. Additionally,
it is important to keep the filter level to prevent any shearing force on the media itself.
For RSR/E Filters:
Tools Required: Phillips Head Driver, Battery Operated Drill, 3/16” hex head ball driver (2ea)
Step 1. With the power off, remove the diffuser screen by removing the 6 each 10-32x1/2 screws, then carefully place in a
safe location.
Step 2. Loosen the eight 1/4x20 socket head screws far enough to rotate the eight filter clips 90°. The filter may be loose
enough to drop during this operation. If not, slowly pull the filter away from the knife-edge seal, taking care not to touch the
filter face during this operation. It is important to pull the filter slowly away from the seal, so that the gel remains in the filter
gel track.
Step 3. Carefully clean plenum assembly knife edge surface of residual gel material.
Step 4. Inspect filter for visible damage, if damaged set aside for replacement or repair.
Step 5. Inspect the gel seal, if reinstalling the removed filter. Determine if the gel has lost its ability to seal (i.e. the gel should
reform to cover the track without voids or openings), if so repair the gel material or consider replacement of filter.
Step 6. Place the filter evenly against the filter-sealing surface of the RSR unit. Reposition filter clips and screws. The
clips should be rotated and angled into place. It is recommended that four workers work on each corner of the filter
simultaneously, holding the filter seated into the track. Hand tighten clips from opposite corners evenly until all clamps are
tightened.
Step 7. Reinstall diffuser screen by hand-tightening the screws.
Step 8. Determine if recertification or testing of replacement is required.
Step 9: Restore power to FFU and verify proper operation of FFU.
Filter
Filter Clip
¼ -20
Cap
Screw
10-32
PHP
Screws
Knife- Edge
Seal
Gel Track
Diffuser
Screen