Plumbing Guidelines
(cont)
Valve Purpose and Adjustments
46
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.
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.
PRESSURE RELIEF VALVE
The pressure relief valve is used to avoid excessive pressure
when the booms are turned off. Start with the handle screwed
mostly out. Slowly bring pump up to operating RPM (make
sure pressure does not go too high). Put the MT-3405D in
MAN and turn boom on. Hold adjust switch to “+” for about
30 seconds to fully close servo valve. Turn booms OFF. Now
slowly screw handle in until maximum desired pressure is
reached. 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 Pre-field System
Checkout on pages 38-39.
If the throttle valve needs to be
more than two thirds closed, open the Range valve slightly
and perform the Pre-field System Checkout again.
THROTTLE VALVE (BYPASS PLUMBING)
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 38-39.
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 (Spraying Systems Type 12690
or 12795). 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 valve is closed too much, PSI may
fluctuate greatly in AUTO.
RELIEF SOLENOID VALVE
The optional relief solenoid will ensure enough bypass to
avoid excessive pressure when the boom valves are turned
OFF.
See page 23.
Содержание DUAL CONTROL MT-3405D
Страница 1: ...REFERENCE MANUAL DUAL CONTROL AUTOMATIC RATE CONTROLLER MT 3405D ...
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Страница 56: ...P N 14366 56 Appendix F cont MT 3405D NH3 Specific cont MT 3405D Wiring Diagram for NH3 Channel 1 ...
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