30
9. PRIME AND DISCHARGE
3.
Return the priming lever to the original position.
・
Limit the vacuum pump operating time to within 30 seconds.
・
If the pump can’t suction water within 30 seconds, it may have a
problem. Refer to “Chapter 16 TROUBLESHOOTING” to rectify the
problem.
・
When priming water from a water source that is considerably lower
location than the pump, suction may fail to bring water up to the
pump.
・
If the pump runs with no discharge water for more than 2 minutes
(If it's at low speed), the pump may have damages. The pump should
be run with water discharge for protecting some parts of the pump
such as mechanical seal by cooling water (discharge water).
4.
Turn the handle slowly to open the discharge valve
as shown in the picture.
The discharge valve handle can be turned
approximately 90 degrees.
・
Before opening water discharge valve of the pump, be sure to
warn the person holding the nozzle, and confirm to be ready to
discharge water.
・
During operation, check the suction and discharge hoses.
・
The hoses must be free of kinks, pinches, etc., possibly caused
from emergency vehicles rolling over the 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 the 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 more until
the water is continuously discharged.
OPEN
CLOSE
Discharge valve handle
CAUTION
NOTE
NOTE
