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MAINTENANCE
Cleaning the Flow Piston
Cleaning the Flow Piston
Risk of severe injury or death by electrical shock or pressurized fluids.
•
Hot water or vapor inside could be pressurized and could cause severe burns.
1.
Disconnect the unit from incoming power.
2. If the system is under pressure, close both the inlet and outlet valves and drain
all pressurized water from the system. Refer to
page
13.
3. Remove the six cap screws and the cap.
IMPORTANT: Be careful when removing the control cap, as there is an electri-
cal cable attached to the head.
4. Remove the three Phillips screws that hold the flow cap in place.
5. Remove the flow cap.
6. Remove the O-ring and make sure it is free of debris.
7.
Place the O-ring back on the bottom of the flow cap.
8. Use a small metal object, such as a screwdriver or nut driver, to retrieve the
magnetic flow piston from the cavity.
9. Clean the flow piston with a clean cloth. Clean any debris or residue from the
head where the flow piston is inserted.
10. Replace the Flow Piston into the Control Head.
•
Press the Flow Cap with the O-ring firmly into the head.
•
Tighten the three screws to 15 in-lbs (1.7 N-m).
•
Do not over tighten.
11. Replace the cap and tighten six screws to 15 in-lbs (1.7 N-m).
12. Re-calibrate control head.
Re-calibration of Control Head
Re-calibrate the unit in order to re-establish a reference point for the indication of flow.
1.
Remove power from the unit by unplugging it.
2. Verify there is no water flowing in the system.
•
This ensures that the flow piston is in the fully seated (zero flow) position.
3. While holding down the push button on the status display, reapply power.
4. Continue holding down the button for five seconds until both the green and
red LEDs blink, indicating calibration is complete.
5. Release the button so the red LED goes solid, indicating calibration was successful.
6. Open valves/taps to begin water flow and confirm unit is operating properly.
14
"Draining the System" on
Control Head
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