Hypertherm HyPrecision 100D, Инструкция по эксплуатации

Страница: 55 / 77

In the case of severe contamination such as with water, drain and clean out other
areas such as the shift valve, main manifold, and the hydraulic pump.
8.2 Control Manifold
The control manifold consists of two solenoid valves for high (5) or low (4) pressure selection, two
pressure control knobs for setting of the high and low pressures, a small accumulator (1) , and a gauge
for the hydraulic pressure. The control manifold connects to the pump compensator port and has a
connection to the hydraulic tank. Some HyPrecision pumps may be available with electronic pressure
compensation. The following control manifold sections refer to pumps that do not have this option. For
systems equipped with electronic pressure compensation contact Hypertherm for information on
adjusting the pressure.
Cutting Pressure Knob and Pierce Pressure Knob
The cutting pressure and pierce pressure knobs are located
on the front of the control manifold and are used to adjust the
cutting and pierce pressures. See the
Operation section for
instructions on setting the operating pressure.
Cut Pressure Select Solenoid Valve
The cut pressure select solenoid valve (5) is a normally open
valve located on the back of the control manifold directly
behind the cutting pressure knob. In the event of a power
loss, the solenoid will discharge pressure from the hydraulic
system and cause the bleed-down valve
(2) to relieve high-
pressure water. This solenoid has a manual override (3) . If
solenoid coil fails, the valve can be manually turned on until
the coil is replaced.
WARNING
Using the cut pressure select manual override will prevent the discharge of
hydraulic and water pressure at shutdown. Pump pressure ramp-up will be abrupt.
This feature should only be used as a temporary feature until a new solenoid coil
is installed.
Hydraulic Gauge
The hydraulic gauge shows the operating pressure of the system. It is also used to determine the current
cutting water pressure. Multiply the gauge value by the intensification ratio of 19.25:1 to get the current
water pressure. A gauge pressure of 3,000 psi will have the output pressure of about 57,000 psi.
53