9
5.
If the diver operating the unit must be replaced or the cleaning operation must be interrupted
or terminated, shut down the engine by moving the throttle lever down to adjust engine RPM
to “MIN” (Figure 18) and turning the key to the “OFF” position (Figure 16). Turn off the feed
pump (Figure 13),
and then release the water pressure in the hose(s) by squeezing the gun
trigger to the open or “ON” position (Figure 19)
while under water
.
Revert back to step 1 of
the operating instructions when the replacement diver is ready to continue cleaning.
6.
Ensure that the gun is submerged any time the engine and pressure pump are operating.
Adjusting the CaviBlaster
®
system for maximum performance:
1.
If using a calibration pressure gauge situated between the pressure hose and the CaviBlaster
®
gun, the water pressure should be 2,200-psi with the gun submerged and the gun trigger in
the open or “ON” position.
The pressure is adjusted by turning the nuts on the end of the
pressure-regulating unloader (Figure 20).
This adjustment increases or decreases the flow of
water through the bypass hose when the CaviBlaster
®
gun trigger is in the open or “on”
position. The flow of water through the bypass hose, in turn, determines the flow of water
through the pressure hose and the gun. Less flow through the bypass hose means more flow
through the gun which translates to higher velocity and pressure.
There should always be a
trickle of water through the bypass when the gun trigger is in the open or “ON” position.
This
ensures that the bypass will open without a pressure shock wave damaging the pump when
the gun trigger is released to the closed position.
2.
If using a pressure gauge located on the
CaviBlaster
®
power unit, the water pressure
will need to be higher to account for sidewall
friction loss in the pressure hose. The pressure
at the pump should be 2,800-psi plus 0.75-psi
per foot of pressure hose. For example, if using
the CaviBlaster
®
with 100 feet of pressure hose,
the pressure gauge located next to the pump
should indicate 2,875-psi. Pressure adjustments
are made in the same manner as described
above.
There should always be a trickle of
water through the bypass when the gun trigger
is in the open or “ON” position.
Figure 20
3.
If adjusting the CaviBlaster
®
without a pressure gauge, close the pressure-regulating
unloader until there is just a trickle of water (less than ¼ gallon per minute) coming out of
the bypass with the gun trigger in the open or “ON” position.
Summary of Contents for 1228-G
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