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ACM 150
Service and setup instructions
Solenoid valves
Sample valves
To service the valves, remove one 10-port manifold at a time. First, disconnect the inlet
tube fittings,
Figure
the manifold up and out. Lay it on its side. Disconnect the tube fittings that connect to
the two manifold headers and unplug the electrical connector.
The header tube fittings and connector are shown in
work area.
Follow these procedures to correct problems:
•
Valve fails to open: Replace the solenoid body.
•
Valve leaks/fails to seal properly: Check for loose screws and tighten them. If no
screws are loose, disassemble the valve and clean the metal base. Inspect and
clean or replace the o-rings between the metal base and the manifold.
•
Orifice is partly or completely plugged: Disassemble the valve and remove the
orifice plug on the side. Clear the orifice using compressed air, tweezers or
alcohol, as needed and clean all surfaces.
•
Any evidence of corrosion: Replace the entire valve.
For valves that are functioning properly and show no flow restriction, use a screwdriver
to make sure that the screws securing the valves to their base and to the manifold are all
tight (avoid using force to over-tighten the screws).
Cycle valves
Remove the Cycle Valves as a subassembly. First, disconnect the tube fittings
connecting these valves to external components. Next, unscrew the electrical
connectors. These tube fitting connections and electrical connectors are identified
in
Figure
9. As you disconnect each tube and connector, verify that it is properly
labeled. If not, add an ID label (masking tape marked with a pen makes a good
temporary label). Remove the screws connecting the plate and move it to a work
area.
Follow these procedures to correct problems:
•
Valve fails to open: Replace the entire valve.
•
Valve is sticky or leaks/fails to seal properly: Disassemble the valve and clean
the valve plunger, seat and ports. The disassembled metal parts may be wiped
with alcohol or even washed in warm soapy water. Check the valve to assure
that it moves freely in its guide and that the springs have enough flex to hold the
plunger closed. Place it back into service. Alternately, you can replace the valve
body and reuse the coil if it is working properly.
•
Any evidence of corrosion: Replace the entire valve.
NOTE
Bottom screws must be removed from the plate to take out a valve. These
valves are disassembled by first removing the coils, then removing the valve
guide (housing with plunger inside). If you replace the coil or the entire valve,
you will need to install an amp connector on the coil wire lead.
6, and remove the pair of screws at each end. Use the handles to lift
Figure
5. Move each manifold to a
131
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