Lpg System; What Is Lpg; Lpg Box; Suspected Lpg Leak - Polar Electro 520 CTH DB 2020 Instruction Book

The LPG system is designed in accordance with the
Swedish National Inspectorate of Explosives and Flam-
mables' provisions for installation in caravans.

What is LPG

LPG is a fuel made from petroleum. LPG is stored in
liquid form in LPG bottles. At atmospheric pressure,
LPG is a gas comprising propane or butane, two gases
that are simple compounds of carbon and hydrogen. LPG
is colourless and odourless. An odorant has been added
to the LPG used in caravans in order that leaks can be
traced. LPG is heavier than air and therefore collects
close to the floor in the event of a leak. It has a high
thermal value and burns with a very hot flame. The gas
consumes large amounts of oxygen when it burns. It is
therefore important to ensure a rich air supply when an
LPG flame is lit. For this reason, never block holes and
vents in the floor and walls.
LPG consumption
Unit
Cooker Smev large burner
small burner
oven
grill
Boiler, Alde
Refrigerator, Thetford N3175
∆
The LPG bottle must be switched off before
driving with the caravan. You are not allowed
to drive with the LPG apparatus lit.

LPG box

The LPG box is equipped with a lockable lid. The LPG
bottle and leak indicator are placed inside the LPG box.
To keep the lid in the open position, a holder with gas
springs is installed in the box (see page 25).
1 2
1. LPG bottle
2. Main valve

LPG system

Grams/hour
131 g
116 g
max 405 g
ca 17,5 g
3 4
3. Reducing valve, 3 kPa
4. Leak indicator
LPG system
∆
LPG leaks must be repaired by an expert.
∆
Holes and vents in the floor and walls must
never be blocked.

Suspected LPG leak

• Extinguish cigarettes, candles, etc., immediately.
• Switch off all LPG flames.
• Close the shut-off valves for the LPG apparatus.
• Close the main valve on the LPG bottle.
• Ventilate thoroughly. Ensure that there is a draught
through the caravan.
• Test the airtightness of the LPG system with the leak
indicator (see page 42).
• If the test indicates a leak, contact an expert for
remedial action.

Actions in the event of fire

73 g To extinguish small fires in the caravan, you are recom-
mended to have at least a 3 kg powder extinguisher in
87 g
the caravan. The use of water alone for extinguishing
is not recommended.
In the event of a small fire inside the caravan:
Close the shut-off valves inside the caravan and the main
valve on the LPG bottle in the LPG box.
In the event of a small fire outside the caravan:
If possible, close the main valve on the LPG bottle in
the LPG box.

LPG bottles

LPG bottles must be kept upright during transport,
storage and use. If a bottle is lying down, there is a risk
of the bottle's safety valve being disabled. Liquid LPG
can also escape in the LPG line and up to the burners,
where it can produce flames that flare up in spurts.
• An LPG bottle must not be exposed to abnormal
heating. However, it may be stored e.g. in sunlight
without problem.
• According to the Swedish Work Environment Aut-
hority, all bottles must bear a label showing how the
bottle must be handled, who filled it and what has
been filled in the bottle.
• All LPG bottles must be carefully checked both
before and after filling at the filling station. Any
that are not satisfactory must be replaced with new
ones.
• All LPG bottles must be inspected periodically in
accordance with official provisions.
• A caravan may be equipped with a maximum of
two 11 kg LPG bottles located in a box outside the
caravan.
41