STS M-750H, Operator'S Manual

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M-750H
Operating the M-750 Unit
Optional Self-Loading Feature
Self-Loading (customer to install)
If the self-loading feature of The M-750 is required, you will find a 2 in. NPT (suction) port located on
the venturi-mixing tee below the hopper valve (Fig.14a). All units are shipped with a plug installed in the
port.
A common practice is to use this “suction port” to draw fresh water from another reservoir tank.
As shown in (Fig.14b) remove the plug and install an elbow, close nipple, full flow ball valve and a type of
quick coupler capable of being capped when not in use OR a hose barb and a non-collapsing hose (hard hose)
can then be installed as a permanent connection AFTER the valve.
Caution should be used when threading in a connection into the suction port. Do not over tighten the
Regardless of the configuration of the connection used, this port needs to be sealed off (valve or capped)
when not being used as a suction port. The reason for this is that then the unit is shut off, fluid will fill the
mixing tee and spill out the port or when the unit is in operation, it will draw air and a decrease the vacuum
at the hopper inlet.
When the unit is mixing product from the hopper, this port will need to be closed. If you are using this port
for suction, the hopper valve is to be closed. THIS MEANS YOU CANNOT “MIX ON THE FLY” OR MIX
AND SUCK AT THE SAME TIME!
If the suction port is connected (as described above) but not used frequently, a build-up of dry
product may form inside the port at the mixing Tee. The wash wand can usually wash this out. If you notice
a decrease or stoppage in the amount of fluid being drawn in to the system through this port, then there is
build-up at the port and should be cleaned.
Fig.14a
Fig.14b