Milnor 72044 WP2, Service, Page: 154 / 202

MSSM0213AE /89457V (1 of 2)
È RULES FOR THE FIELD INSTALLATION OF
PUMPED-TYPE LIQUID SUPPLY SYSTEMS
APPLICABILITY: All Washer-Extractor Models
Ê GENERAL
Pellerin Milnor Corporation does not guarantee machines against damage from corrosion caused
by improper installation and/or operation of pumped-type liquid supply systems. The following
precautions must be observed when pumps are used:
1. Always install the pumping unit lower than the dis-
charge end of the chemical delivery tube as shown
at right. This will prevent any excess chemical con-
centrate from dribbling out of the tube and onto
unprotected machine surfaces when the machine is
idle.
Merely putting a "drip loop" in the delivery tube
won’t help much. (It might reduce the dribble a
little, but not enough to prevent damage.) The real
solution is to install the pumps below the dis-
charge end of the delivery tubes so excess chemical
won’t dribble out of the tube long after the pumps
stop.
2. If the machine is also equipped with a flushing supply injector:
a. Always wire the new system so the appropri-
ate flushing valve also operates whenever
chemical is being injected. This will dilute
the concentrated chemical with obvious ad-
vantages. If possible, the water flushing valve
should remain on for a minimum of 30 sec-
onds after the longest injection time for that
chemical.
b. Always inject the chemical into a plastic cup
(and direct the flushing water into the same
cup). This way, any chemical that dribbles out
Discharge end
of delivery tube
Pum p (below
discharge end
of delivery tube)
Flush valve ON
when pum p is
operating
Supply
tube feeds
into cup