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of the tube after the pump stops will be diluted by the water remaining in the cup.
3. Never inject any concentrated chemical directly onto any metal, rubber, or plastic surface
of the machine other than the plastic cups provided.
It is not enough to merely inject the chemical onto a surface that will be subsequently flushed or wetted
sometime during the wash process. This is because the "culprit" is the chemical which dribbles out later.
The damage occurs when the residue of a chemical (even a diluted chemical) dries on a surface—as when
a chemical dribbles out of the delivery tube after the last wash cycle is finished. As the chemical dries, the
water content evaporates—leaving a deposit of a very concentrated chemical which is then free to attack
the host surface throughout the night (or over the weekend) or until the machine is returned to service.
The only realistic solution is to make sure that the discharge end of each chemical delivery tube
is above the pump so excess chemical left in the tube after the pump stops cannot dribble out
later.
RULES FOR THE FIELD INSTALLATION OF
PUMPED-TYPE LIQUID SUPPLY SYSTEMS
MSSM0213AE/89457V (2 of 2)