Wabtec Microphor MICROFLUSH LF-210 - System Operation Explained; Air;Water Sequence Valve Operation; Basic Toilet Operation Sequence

MICROFLUSH Toilet Manual 11 March 2005
1. In the normal rest position, pressurized air enters
the Flush Activator and goes from Flush Activator
Port 1 (Green tube) to Air/Water Sequence Valve
Port 2, through Port 3 (Red tube) to Air Cylinder
Port 4 holding the Flapper closed, sealing the water
in the bowl and maintaining a proper water surface
area.
2. When the Flush Activator is pressed, air is
shifted to Port 5 (Blue Tube) to A/W-Seq. Valve
Port 6 and on to Air Cylinder Port 8 (White Tube).
The air in the base of the Air Cylinder is bled off
through Port 4 (Red Tube) to Port 3 and out Vent
[1], allowing the Air Cylinder to retract, opening
the Flapper. Simultaneously, pressurized air in the
b
ase of the A/W-Seq. Valve pushes the piston and
spool assembly up to open the water passage,
allowing water to enter and rinse the bowl. The air
on the top of the piston is bled off through Port 1
and out Vent [2].
3. As the Flush Lever is released, the Flush
Activator returns to the normal rest position
redirecting pressurized air to Port 2, Port 3 and Port
4. The Bleed-Off Plug [12] bleeds off the air (Black
Tube) under the piston, causing the spool to move
downward, gradually closing the water passageway.
The air having been bled off the top of the Air
Cylinder Port 8 (White Tube) through the end of
the Flush Activator Vent [2] (Blue Tube), allows the
Air Cylinder to close the Flapper allowing water to
accumulate in the bowl, restoring a proper water
surface area.
4. Near the bottom of the piston stroke, the air
p
assageway from Port 10 (Yellow Tube) to the
Hopper Port 11 is unblocked for 4-11 seconds to
p
ressurize the hopper and expel the waste contents
over the trap and into the waste line.
5. As the A/W-Seq. Spool reaches the bottom
p
osition, the water supply is shut off, completing
the flush cycle.
In the event of air supply failure, the spring in the
Air/Water Sequence Valve maintains the valve in
the closed position, blocking the water passageway.
The flapper will open and allow water in the bowl
to flow into the hopper forming a water seal.
Water In
Air In (60 PSI)
Flush Activator
Air & Water Sequence Valve
Air
Cylinder
1
2
3
4
1
2
3
4
5
6
7
8
2
1
1
11
10
1
2
3
4
8
9
12
2
File: AWS-bw
File: 210-op
BASIC TOILET OPERATION
AIR/WATER SEQUENCE VALVE OPERATION