Envirco MAC 10 LE-DC - Manual (Page 13)

MAC 10
®
LEDC
4x4 Fan Filter Unit
13 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
■ Service: Removal and Replacement of Standard 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 Standard Filters:
Tools Required: Phillips Head Driver, Battery Operated Drill
Step 1. Remove the 28 plenum housing screws. Retain for installation of new filter.
Step 2. The plenum housing must be raised up and placed out of the way to allow the filter to be turned and lowered
through the ceiling opening. Service wiring may need to be disconnected by qualified personnel.
Step 3. Before replacing with the new filter, carefully inspect the new filter for any visible damage. Also inspect the gasket
and the T-Bar to insure a tight seal. Replace if necessary.
Step 4. To replace a filter, raise the filter and rotate into position in the ceiling grid (with power off) , then lower the plenum
housing into place. Reconnect wiring and hardware from previous steps that have been removed.
Step 5. Restore power and verify proper operation of FFU.
Standard Filter Change
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.
Screws
(28)
HEPA/ULPA
Filter
Plenum Assembly