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Fuel and autogas supply unit: repairs > < Electronic regulation of engine output, electronic accelerator

Leon Mk1

Fuel tank (LPG): Draining
Fuel tank (LPG): Draining
In event that the valve for the gas tank is defective -N495- (valve does not open), drain the fuel tank (LPG). → Anchor
  Note
t  If the valve may have to be replaced for the gas tank, the customer should be informed that they have to drain the gas tank properly before depositing the vehicle in the workshop.
t  Even when the inidicator displays that the tank is empty, liquid residues may still be at hand in the gas tank depending on the settings of the gas pressure limits. All residues must be drained completely!
   
Safety area
A - Wind direction
B - At least 10 m
C - At least 20 m
The safety area must be cordoned off using warning bands and the access points must clearly indicate that there is a risk of explosions.
  WARNING
Liquified gas is heavier than air!
In the safety are, there should be no recesses, pits, channels, cellars or other rooms that are in lower areas where the gas is able to escape to.
There must be no active sources of ignition, such as open fire, electric sparks, electrostatic discharge and hot surfaces that may lead to the ignition of the liquified gas.
  Note
t  Special attention must be paid to prevent gas from entering neighbouring buildings, such as through open doors and windows. The area must be freely accessible and well ventilated (not a backyard).
t  The direction of the wind has to be considered:
Version for completely emptying the fuel tank (LPG)
  WARNING
Liquified gas tanks may not be emptied in closed rooms!
There is a risk of explosions or poisoning!
Fuel tanks must always be drained outside!
t  Conventional tank draining systems or liquified gas fackel developed for LPG
Handling, → corresponding operating instructions
Or
t  Venting the ambient air
–  Gas line: Draining → Chapter.
  WARNING
Liquified gas can cause injuries.
The system is pressurised!
Meet the required measures: Wear protective gloves and safety goggles.
Before opening the system place a cloth around the connection. Then release pressure by carefully loosening the connection.
  N20-10669
–  Loosen the screw connection -arrow- of the gas line -1- on the gas inlet of the filer housing using a hollow bolt.
–  Installing a drain line.
The drain line must have the following features:
t  copper pipe or a hose with copper ends and a connecting piece.
t  Outside diameter Ø max. 6 mm
t  Length: Approx. 12 m
–  Setup a safety area → Anchor.
–  Route the drain side without kinks and connect with the gas line of the vehicle.
  Note
Observe the wind direction
–  Connect the valve for the gas tank -N495- with a mains cable.
–  Make sure that the ignition and the electric consumers of the vehicle are switched off and that the doors are closed.
–  Connect the mains cable to an additional battery.
  WARNING
Due to reasons of safety guidelines and regulations for working on Autogas systems, never leave the vehicle unattended.
Start emptying the tank.
Drain the fuel tank (LPG) in event that the valve for the gas tank -N495- is defective (valve does not open).
–  Disconnect the plug connector on the valve for the gas tank -N495--5- and sender for the gas supply display -G707--8- on the gas tank.
  N01-10800
  WARNING
Risk of injuries due to possible escaping gases.
The system is pressurised!
Meet the required measures: Wear protective gloves and safety goggles.
Before opening the system place a cloth around the connection. Then release pressure by carefully loosening the connection.
–  Slacken the gas line to the evaporator -6- and gas line of the connecting support -7-.
–  Loosen the bolts -1- and lift the fuel tank -2- of the vehicle.
–  Limit a safety area. → Anchor
–  Carefully undo the bolts for the sender for the gas supply display -G707- in diagonal sequence.
  Note
The escaping gas can no longer be controlled until the tank has been emptied completely.

   

Fuel and autogas supply unit: repairs > < Electronic regulation of engine output, electronic accelerator