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3 Operation
Bleeding of Tubing A
• Make a mark on the inside of the product container on a level with wiper ring (S) of
Pump Unit A. Pump operation can be checked by monitoring the movement of the
follower plate (lowering of the wiper ring).
• Unscrew vent screw (Z).
• Connect compressed air supply.
• Switch the dispensing station on.
• Set speed selector switch (R) to medium speed.
• Switch to Service Mode, see Section 3.8.1.
• Disconnect pump motor plug (Y) of Pump Unit B to prevent unprimed pump from
running dry and avoid any unwanted discharge of product B.
• Keeping an eye on the mark, briefly actuate the meter-mix dispense gun. The
pump is discharging product when the wiper ring is coming down.
• Actuate the meter-mix dispense gun until product flows from the bleed port (Z).
Wipe product off with a suitable material (cloth).
• Screw vent screw (Z) back in place.
• Actuate the meter-mix dispense gun until product flows free of bubbles and air
inclusions. Wipe product off with a suitable material (cloth).
Caution: If the wiper ring does not come down within >30 seconds, the pump is not
feeding any product (risk of material damage). Be sure to repeat procedure as
described under heading "Positioning of Product Container A".
Dispensing for the first time from the meter-mix gun may result in
danger due to splashing product. Air bubbles may result in
uncontrolled splashing. Be sure to keep a safe distance and hold the
dispense gun in an appropriate and safe position!