User Manual

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

Model for injection of boiler chemicals

PZ-31-FEC (PP)

Model for injection of sodium hypochlorite

PZ-31/61/12-CL

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)