Fuel For Natural Gas Operation; Fuel For Liquid Gas Operation - Opel Zafira Tourer Owner's Manual

Fuel for natural gas
operation
Use natural gas with a methane
content of approx. 78 - 99%. L-gas
(low) has approx. 78 - 87% and H-gas
(high) has approx. 87 - 99%. Biogas
with the same methane content can
also be used if it has been chemically
prepared and desulphurised.
Only use natural gas or biogas that
complies with DIN 51624.
Liquid gas or LPG must not be used.
Fuel selector
Pressing Y switches between petrol
and natural gas operation. Switching
is not possible at high loads (e.g.
powerful acceleration, driving at full
throttle). The LED status shows the
current operating mode.
1 off : natural gas
operation
1 illumi‐ : petrol operation
nates
1 flashes : no switching is
possible, one type of
fuel is empty
As soon as the natural gas tank is
empty, petrol operation is
automatically engaged until the
ignition is switched off.
If the natural gas tank is not refuelled,
the system must be manually
switched to petrol operation before
the engine is restarted. This will
prevent damage to the catalytic
converter (overheating caused by
irregular fuel supply).
If the selector switch is operated
several times within a short time, a
switchover inhibitor is activated. The
engine remains in the current
Driving and operating
operating mode. The inhibitor
remains active until the ignition is
switched off.
A slight loss of power and torque can
be expected during petrol operation.
You must therefore adapt your driving
style (e.g. during overtaking
manoeuvres) and high vehicle loads
(e.g. towing loads) accordingly.
Every six months run the petrol tank
down until control indicator Y
illuminates, then refuel. This is
necessary to maintain fuel quality as
well as system function necessary for
petrol operation.
Fill the tank completely at regular
intervals to prevent corrosion in the
tank.

Fuel for liquid gas operation

Liquid gas is known as LPG
(Liquefied Petroleum Gas) or under
its French name GPL (Gaz de Pétrole
Liquéfié). LPG is also known as
Autogas.
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