Pumping - Theory And Appliance Pump Flashcards
The two types of pumps found on front line pumping appliances are?
Centrifugal pump
Positive displacement pump
What is Power Take Off (PTO)
When the power is diverted from the road wheels to this separate drive shaft
When should happen before engaging PTO
Hand break must be applied
And
“AIR DUMP” switch operated
What is the major pump used in the LFB Mercedes appliance?
Godiva World Series multi-pressure pump
How many litres approximately does the appliance tank hold?
1400 litres
What is the low pressure gauge for?
To make sure the pump is delivering the correct pressure to the branch operators
A sudden increase in a low pressure gauge reading could indicate what?
(3)
Branches being shut down
Kinks in the delivery hose
Vehicles/debris on the delivery hose
A sudden decrease in a low pressure gauge reading could indicate?
(3)
Beaches being opened
Burst delivery hose
The appliance tank is empty
How to get main delivery to work?
Hold down function (master) button. Same time operate the PTO switch until it illuminates.
Hold down function button (master) at the same time, operate the ‘TANK TO PUMP’ switch.
Hold down function (master) button and turn ‘HOSE REEL PRESSURE’ to low pressure as default is high pressure.
Connect hoses and adjust engine speed joystick until desired pressure is reached
How to get a hose reel to work?
Hold function (master) button and at same time operate PTO switch until it illuminates.
Hold function (master) button and operate ‘TANK TO PUMP’
Hold function (master) button and select either ‘HOSE REEL LH’, ‘HOSE REEL RH’ or both
Check that ‘HOSE REEL PRESSURE’ is in position of HIGH PRESSURE
Adjust engine joystick, normally bar of 35 the adjusted as required
What is a flow meter?
It register the flow rate of water going into the tank and is calibrated in Litres Per Minute
What is an Auto Fill Valve
Is when the water flowing from the inlet collecting head to the appliance tank passes through the auto fill valve
What is ‘Overrunning the supply’?
Is when the pump is delivering more water than it is receiving through the augmented supply
The emergency auto bypass procedure is operated if there is auto fill valve failure..
What does it do?
When the bypass lever in the offside rear locker is pulled, it will divert incoming water through a bypass into the tank.
It will deliver up to 1000lpm
