Grundfos Self-Priming Dosing Pump DDA 60-10 FCM-PVC-L/V/SS-F-32A1A1FG

Put on the stipulated personal protective equipment

Take suitable steps to ensure that the returning liquid is safely collected

Dismantling the Deaeration Valve

Empty dosing head and flush it if necessary

Manually unscrew deaeration screw (1) without using any tools

Ensure no dosing liquid has entered the pump housing.

Place new O-rings in the grooves at flange and ensure correct seating.

Attach flange observing alignment pin (12).

Install flange and new O-ring with screws observing alignment pin (12).

Cross-tighten screws with a torque wrench to 6 (+1) Nm.

Attach intermediate ring to flange observing alignment pin (12).

Check if liquid leaks from the drain opening on the dosing head.

Check if the drain opening is blocked or soiled.

Dosing Head and Valves Inspection

Check if liquid leaks from the dosing head or valves.

Tighten dosing head screws with a torque wrench if necessary. Torque [Nm]: 6 (+ 1).

Tighten valves and cap nuts if necessary, or perform service.

Check if a service requirement is present at the pump display.

Ensure all electrical connections are carried out by a qualified electrician

Disconnect the pump from the power supply

Replace mains cable (13) and gasket (13b)

Screw in safety screw (13a) with a torque wrench

Ensure the pump is correctly installed and ready to start before switching on the power supply

Verify that plugs or protective caps are correctly installed to maintain enclosure class (IP65 / Nema 4X)

Avoid manipulating mains plug or cable

Ensure maintenance is performed by qualified personnel

Verify authorization to open pump housing

Inspection of Diaphragms and Valves

Check for signs of wear on the following parts

Are there any worn parts that need replacement?

Replace worn parts with original spare parts made from suitable materials