Polar Electro 520 CTH DB 2020, Instruction Book

Page: 42 / 60

LPG system
Glass container
with fluid
Leak indicator
Test button
Shut-off valve
The caravans are equipped with one or more shut-off
valves for the LPG apparatus. The shut-off valve is usu-
ally located under the refrigerator or in the lower sink
cupboard.
On the shut-off valve gas taps there is a decal showing
each consumer.
NOTE!!
The relative order of the gas taps may vary
dependent on model.
On the wall next to the shut-off valve there is a decal
showing valves in the opened or closed position.
Leak indicator
The caravan is equipped with a leak indicator that shows
if there are any leaks in the LPG system. Every time you
use the caravan, you should check if there are any leaks
using the leak indicator. This does not replace pressure
testing the system, which must be performed at an aut-
horised workshop.
The leak indicator is connected to the LPG line and is
located in the LPG box.
Test the LPG system with the leak indicator
every time the system is to be used and whe-
never you change the bottle.
∆
LPG leak test
1. Check that the leak indicator’s container is half-filled
with fluid.
If not, top up with fluid. Proceed as follows:
• Close the main valve on the bottle if it is open.
• Unscrew the container and fill with fluid (our
part no. 500693) to the upper level indicator.
• Screw on the container again and check that the
gasket is correctly seated.
2. Open the main valve on the bottle. The bottle must
not be empty.
3. Turn the knobs for all users to the open position,
which will allow the airtightness of the safety devi-
ces to be tested as well.
4. If an LPG oven is installed in the caravan, it must be
switched off and the thermostat knob set to position 6.
5. All the shut-off valves for the LPG apparatus must
be open.
This type of leak test is very sensitive to every pressure
change, and therefore indicates the smallest imaginable
leak within 10 seconds. If testing is carried out over
an extended period, bubbles may start to appear due to
pressure variations in the reducing valve. If the system
has not been used for an extended period, bubbles can
occur due to the LPG hoses absorbing some of the LPG.
In such cases, the test should be repeated a few times.
Once you have ascertained that there is a leak in the
system, contact an expert.
Do not use the LPG system if a leak has
occurred.
∆
Open position
Open position
Open position
Checking leak indicator
After filling with fluid, the airtightness of the leak indi-
cator should always be checked. The leak indicator is
self-testing, i.e. if a leak has occurred in the leak indicator,
bubbles will appear in the container when the test button
is pressed. Don’t forget to open the main valve on the
LPG bottle before performing the check.
Also check the function of the leak indicator from time
to time. This is done by switching on e.g. the refrigera-
tor and then pressing the red test button. If there are no
bubbles, the tester may be clogged with dirt. This must
be rectified by an expert.
Main valve Sight glass Test button Leak indicator
42