Helio O Series Owner's Manual page 23

4. If a leak is detected, tighten the connection using two open-end
wrenches until the bubbles stop forming. Do not over-tighten
and do not use excessive force. If the leak persists, contact a
repair and maintenance technician certified in propane gas.
DO NOT use tools to tighten the tank's service valves.
5. Check the propane gas pipes where contact with the frame
may have caused cracks or damage due to vibrations or shocks
from driving on the road.
Note:
Helio does not recommend and strongly advises against anyone other
than a repair and maintenance technician certified in propane gas
from making the necessary repairs.
Propane gas is naturally odourless. The ethanethiol additive creates
an odour of garlic. The addition of this chemical odor helps detect
leaks.
Never use a different propane gas tank from the one included
in your trailer. If you have to replace the tank, check with your
dealer for the appropriate specifications and tank replacement
procedure. Keep the tank firmly secured in its appropriate position.
Use all the given parts to ensure adequate position and support.
Keep the tank's service valve accessible at all times. In an
emergency, it may be necessary to access the service valve quickly
and cut the gas supply.
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Make sure the tank is not filled past the 80% mark. If the tank is
too full, make sure the propane supplier empties the excess liquid.
A too full propane cylinder does not have the 20% expansion
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space necessary for the vapor. Not having this extra space may lead
to uncontrolled propane gas flow, which may cause a fire or
explosion.
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Never alter the position of the regulator. Propane regulators must
always be installed with the vent facing downwards. Keep the cover
of the regulator in place in order to minimize blocking of the vent
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(this can lead to excessive gas pressure resulting in a fire or explosion).
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Never check for leaks using an open flame. Also, never try to make
repairs in the propane gas system without the know-how and the
appropriate tools for the task.
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Do not stock propane gas tanks or other types of fuel inside
the trailer. Propane cylinders are equipped with safety devices
that get rid of extra pressure by releasing propane gas into the
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atmosphere.
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