39
PRIME AND DISCHARGE
In the auto priming mode,
・
The vacuum pump runs at around 1800rpm.
・
If a water cannot be supplied within 30 seconds, the engine
will stop automatically.
・
If the engine speed is lower than 1300 rpm and the vacuum
pump is not operated, the engine will stop automatically in
about 30 seconds.
4. Check that the pumped up water is discharged from the priming outlet of
the vacuum pump, and be sure the pressure gauge shows positive side.
・
The vacuum pump automatically operates for 30 seconds.
・
If suction water cannot be completed within the time the
vacuum pump operates, there are some other problems.
Check the cause.
(Refer to “Chapter 16 TROUBLESHOOTING”)
Start to discharge water after informing the people who are on the hose
side.
5. Open the discharge valve handle
s
lowly to start discharging water,
・
Before opening water discharge
port or valve of the pump,
confirm the person holding the
nozzle or the branch pipe, who
have already checked the nozzle
is opened and ready to
discharge water.
・
During operation, check the suction and discharge hoses
.
They must be free of kinks, pinches, etc., possibly caused
from emergency vehicles rolling over hose.
・
To avoid the air left in the hose, the pump should be located
above the suction hose. If some air left in the hose, the pump
may not be able to discharge water by the accumulated air in
the hose when you open the discharge valve. In this case,
open the discharge valve and operate the vacuum pump for 3
to 5 seconds until the water is continuously discharged.
9
NOTE
NOTE
NOTE
CAUTION
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