Opel Zafira Tourer Owner's Manual page 212

210 Driving and operating
LPG consists mainly of propane and
butane. The octane rating is between
105 and 115, depending on the
butane proportion. LPG is stored
liquid at around 5 - 10 bar pressure.
The boiling point depends on the
pressure and mixing ratio. At ambient
pressure, it is between -42 °C (pure
propane) and -0.5 °C (pure butane).
Caution
The system works at an ambient
temperature of approx. -8 °C to
100 °C.
Full function of the LPG system can
only be guaranteed with liquid gas
which complies with the minimum
requirements of DIN EN 589.
Fuel selector
Pressing LPG switches between
petrol and liquid gas operation as
soon as the required parameters
(coolant temperature, gas
temperature and minimum engine
speed) have been reached. The
requirements are usually fulfilled after
around 60 seconds (depending on
exterior temperature) and the first firm
press on the accelerator. The LED
status shows the current operating
mode.
1 off : petrol operation
1 flashes : checking conditions
for fuel transition to
liquid gas operation.
Illuminates if
conditions are fulfilled.
1 illumi‐ : liquid gas operation
nates
1 flashes 5 : liquid gas tank is
empty or failure in
times and
liquid gas system. A
extin‐
message is displayed
guishes
in the Driver
Information Centre.
The selected fuel mode is stored and
reactivated at the next ignition cycle if
conditions allow.
As soon as the liquid gas tank is
empty, petrol operation is
automatically engaged until the
ignition is switched off.
Every six months, run the petrol tank
down until control indicator i
illuminates, then refuel. This helps
maintain fuel quality and system
function for petrol operation.