b. Removal Backwash Timer. Disconnect timer power cable and remove backwash timer in accordance with
c Removal, Multimedia Filter Assembly. (Figure 338)
ROWPU piping and equipment can contain extremely high
pressure during and after operation. If this pressure is not
relieved before working on these pipes or equipment, serious
injury or death may occur. Be sure to open all drains and vents
before beginning any disassembly.
Removal of the multimedia filter assembly requires the use of a
5ton (4.54 tonnes) crane.
(ARMY) A section of the frame structure directly above the
multimedia filter assembly must be removed to provide
clearance. Cut channel approximately two inches (5.1
centimeters) from existing welds, and remove from ROWPU
frame. Do not discard removed section. It will be rewelded in
place after installation of new or rebuilt multimedia filter
Disconnect three couplings (2) and move vent lines out of the way.
Disconnect coupling (3) and move drain line out of the way.
Plug vent and drain ports.
Disconnect three unions (4) from inlet, outlet, and waste drain ports.
Secure Orings on unions.
Loosen two turnbuckles (5) and remove them from the tank lifting hook eyebolts.
Remove twelve bolts (6) and twelve lockwashers (7) from ROWPU frame and mounting flange (8) of
multimedia filter tank (1).
(7) Remove two bolts (9), lockwashers (10), and nuts (11) from frame structure (12).
(8) Attach two crane hooks to the lifting hook eyebolts and carefully hoist filter (1) through opening in top
of ROWPU frame.