Pump Solutions Group Neptune Solenoid-driven Diaphragm Metering Pump ARPZ-31_61_12 - Manual (Page 27)

26
Operation
Air releasing
! WARNING
• During the air releasing, chemical may suddenly gush out from the pipes and other parts. Lead the end
of the relief/air-release hose bank to the tank or other container, and secure it so that it will not become
disconnected.
IMPORTANT
• When using the pump for the first time or when the chemical container has been replaced, proceed with
the task of air releasing prior to operating the pump.
Air-release knob
Gap
Retaining nut
(1) Before proceeding with the air releasing, check that the end of the relief/air-release hose has been led back to the
tank or other container.
(2) Turn off the pump’s power, and release the pressure inside the discharge-side pipe.
(3) Set the discharge volume to the maximum level. (See page 28)
(4) Turn on the pump’s power to start operating the pump.
(5) Rotate the air-release knob clockwise by about 90 degrees.
The presence of a gap between the knob and retaining nut is now visible.
(6) After a few moments air will exit from the relief/air-release port together with the liquid.
(7) After all the air has been released, turn the air-release knob further in the clockwise direction until a clicking sound
is heard.
(8) Shut down the pump.
IMPORTANT
• Under no circumstances must the air-release knob be turned counterclockwise.
NOTE
• If it is difficult to release the air, keep turning the air-release knob clockwise until a clicking sound is
heard repeatedly.
Type Page
Model for injection of general chemicals PZ-31/61/12-VEC/VFC/FEC/FFC/FTC
26
Model for injection of boiler chemicals PZ-31-FEC (PP)
Model for injection of sodium hypochlorite PZ-31/61/12-CL 27
Model w/ automatic air-release function for injection of
sodium hypochlorite
ARPZ-31/61/12 27
Model for injection of general chemicals: PZ-31/61/12-VEC/VFC/FEC/FFC/FTC
Model for injection of boiler chemicals: PZ-31-FEC (PP)
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