micro-trak MT-3405 M, Справочное руководство, Страница: 43 / 56

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Care and Maintenance of your MT-3405M
CONSOLE
Store the console in a cool dry location if it will not be used for an extended period of time, such as during the •
off-season.
As with any electronic equipment, use care in cleaning so that water or other liquids do not enter the case. •
Thoroughly rinse Flowmeter with clean water, install plastic shipping plugs and keep from freezing. •
PRECAUTIONS
The input pressure on the glass-filled nylon flowmeter FM750 GFN should not exceed 100 PSI (7 bar). •
Do not expose the flowmeter to liquid temperatures exceeding 130 degrees F (55 degrees C). •
Some chemicals may damage the PPS turbine or the nylon body of the flowmeter. If you are in doubt, contact the •
chemical manufacturer.
Plumbing Guidelines
(cont)
Valve Purpose and Adjustments
TANk ShUT-OFF vALvE
The tank shut-off valve is for convenience only. It allows
you to work on the plumbing without draining the tank. It
should always be fully open during operation.
See Plumbing
Overview Diagram on page 20.
AgITATION ShUT-OFF vALvE
The agitation shut-off valve is mostly for convenience. It
allows you to work on the plumbing without draining the
tank. It should normally be fully open during operation. See
Plumbing Overview Diagram on page 20.
MEChANICAL PRESSURE RELIEF vALvE
The pressure relief valve is used to avoid excessive pressure
when the booms are turned off. Start with the pressure relief
valve handle screwed most of the way out. Slowly bring
pump up to operating RPM (make sure pressure does not go
too high). Place the ON/OFF switch on the console in the ON
position, place the RUN/HOLD switch in RUN, and turn on
boom one. Hold the “+” button for about 30 seconds to fully
close the servo valve. Place the console in HOLD. Boom one
should shut off. Now slowly screw the pressure relief valve
handle in until the desired maximum pressure is obtained.
Lock handle in place with locking nut or collar.
NOTE: Spraying Systems 144h directovalve has a maximum
pressure rating of 100 PSI (7 bar).
RANgE AdjUST vALvE
The range adjust valve is required when the pump is much
larger than necessary. When the range valve is opened,
some of the liquid will be bypassed around the pump to
avoid “overloading” the rest of the system. The setting of the
range adjust valve is determined by the throttle valve. Start
with the range valve fully closed and perform the “Pre­field”
System checkout on page 33. If the throttle valve needs to
be more than two thirds closed, open the range adjust valve
slightly and perform the “Pre-field” Checkout again. See
illustration 19 on page 17.
ThROTTLE vALvE
The throttle valve limits your high end to maximize servo
performance. Start with throttle valve fully open and
perform the “Pre-field” System Checkout on page 33. See
Plumbing Overview Diagram on page 20.
eXaMPle
With the throttle fully open and servo fully closed, you
may be able to get 50 GPA at 5 MPH when you only want
25 GPA. If you were to simply open the servo you may
be able to get down to 25 GPA, but if your speed should
drop to 3 MPH, the servo can’t open any farther and won’t
be able to maintain 25 GPA. Therefore, if you leave the
servo closed and close the throttle until your high end
has dropped from 50 GPA to about 30 GPA, the servo has
a greater operating range.
The throttle valve pictured in the system diagram is
a needle valve. A ball valve may be used but is more
difficult to adjust and keep adjusted. Do not install a
pressure regulator or relief as a throttle valve.
If the throttle is too far closed, PSI may fluctuate greatly in
AUTO.
ELECTRIC RELIEF vALvE
The relief solenoid is intended to insure enough bypass to
avoid over-pressuring the system when the boom valves are
turned off. See illustration 21a on page 21.