Installation and Service Manual – Metered Carbon Filter
Page 25
Copyright © 2012 Applied Membranes, Inc. All Rights Reserved.
Control
Valve
Service
Instructions
Drive Assembly
Disassembly and Inspection:
The drive bracket must be removed to access the drive cap assembly and pistons or the
drive gear cover. It is not necessary to remove the PC board from the drive bracket to remove the drive bracket.
Disconnect the power source plug (4 pin, black cable) from the PC board prior to disconnecting any other plugs from the
PC board. Disconnect and MAV/ AUX drive motors (2 pin, black cable) from the PC board. Disconnect the water meter
plug (3 pin, grey cable), located on the far right side of the PC board. Unweave the wires from the side holders. Two tabs
on the top of the drive back plate hold the drive bracket in place. Simultaneously lift the two tabs and gently ease the top
of the drive bracket towards your body. The lower edge of the drive bracket has two notches that rest on the drive back
plate. Lift up and outward on the drive bracket to disengage the notches.
To inspect the drive reduction gears, the drive gear cover needs to be removed. The drive gear cover is held in place on
the drive bracket by three clips. The largest of the three clips is always orientated to the bottom of the drive bracket. With
the PC board facing up, push in and down on the large clip on the drive gear cover. Handle the cover and the gears
carefully so that the gears do not fall off of the pegs in the cover. Replace broken or damaged drive gears. Do not
lubricate any of the gears. Avoid getting any foreign matter on the reflective coating because dirt or oils may interfere with
pulse counting.
The drive bracket does not need to be removed from the drive plate if the motor needs to be removed. To remove the
motor, disconnect the power and motor plugs from the jacks on the PC board. Move the spring clip loop to the right and
hold. Rotate the motor at least a ¼ turn in either direction before gently pulling on the wire connectors to remove the
motor. Pulling directly on the wires without rotating the motor may break the wires off the motor. Visually inspect the motor
for free spinning and remaining brush life (visible through slots on the size of the motor). Check the pinion gear for
endplay. If the pinion gear is pushed tight against the motor housing, eliminating endplay, slide it away from the housing
so the end of the shaft is flush with the end of the gear.
The PC board can be removed separately from the drive bracket but it is not recommended. Do not attempt to remove the
display panel from the PC board. Handle the board by the edges. To remove the PC board from the drive bracket, unplug
the power, water meter and motor plugs from the PC board. Lift the middle latch along the top of the drive bracket while
pulling outward on the top of the PC board. The drive bracket has two plastic pins that fit into the holes on the lower edge
of the PC board. Once the PC board is tilted about 45° from the drive bracket it can be lifted off of these pins. To reinstall
the PC board, position the lower edge of the PC board so that the holes in the PC board line up with the plastic pins. Push
the top of the PC board towards the valve until it snaps under the middle latch, weave the power and water meter wires
into the holders and reconnect the motor, water meter and power plugs.
Reassembly:
If the drive gear cover was removed, reinstall it with the large clip orientated towards the bottom. If all three
clips are outside of the gear shroud on the drive bracket the drive gear cover slips easily into place.
To reinstall the drive bracket, seat the bottom of the drive bracket so the notches are engaged at the bottom of the drive
back plate. Push the top of the drive bracket towards the two latches. The drive bracket may have to be lifted slightly to
let the threaded piston rod pass through the hole in the drive bracket. Maintain a slight engaging force on top of the drive
bracket while deflecting the bracket slightly to the left by pressing on the side of the upper right corner. This helps the
drive gears mesh with the drive cap assembly. The drive bracket is properly seated when it snaps under the latches on
the drive back plate. If resistance is felt before latching, then notches are not fully engaged, the piston rod is not in hole,
the wires are jammed between the drive bracket and drive back plate, or the gear is not engaging the drive cap assembly.
Replace the motor if necessary. Do not lubricate the motor or the gears. To reinstall the motor, move the spring clip loop
to the right and hold. Gently turn the motor while inserting so that the gear on the motor meshes with the gears under the
drive gear cover. Release the spring clip loop and continue to rotate the motor until the motor housing engages the small
plastic bulge inside the drive bracket motor retainer. Reconnect the motor plug to the two-pronged jack on the lower left
hand side of the PC board. If the motor will not easily engage with the drive gear when reinstalling, lift and slightly rotate
the motor before reinserting. Reconnect the power plug.
Replace the valve cover. After completing any valve maintenance, press and hold NEXT and REGEN buttons for 3
seconds or unplug power source jack (black wire) and plug back in. This resets the electronics and establishes the service
piston position. The display should flash all wording, then flash the software version and then reset the valve to the
service position.
