Polar Electro 520 CTH DB 2020, Instruction Book

Page: 43 / 60

LPG system
Gas outlet in LPG box / External
gas outlet
Some caravans are equipped with a gas outlet in the LPG
box or an external gas outlet on the right side of the front.
These gas outlets are designed for connecting an external
gas equipment, such as a gas grill.
The gas pressure in these gas outlets are regulated by the
caravans reducing valve.
The external gas equipment connected with a nipple
attached to the approved hose for LPG. The gas outlet
shut-off valve can be opened only when the nipple is
connected in the connection. To disconnect the nipple,
the valve must be closed.
Automatic LPG switch
Some caravans are equipped with an automatic LPG switch
in the LPG box. The LPG switch is a combined bottle
switch and reducing valve that automatically switches over
to the reserve LPG bottle when the regular bottle is empty.
It also shows the bottle in operation at the moment. The
switch also allows changing the bottle without downtime
and can also be used with only one bottle conncted.
Information for the status of the bottle and defrost function
can be seen on the Alde panel (see Aldes manual for the
control panel).
New/newly filled LPG bottles
Condensation and unusable LPG can be found at the top
of a new or newly filled LPG bottle. The bottle should
be blown clean before being connected in the system.
Proceed as follows:
1. Unscrew the protective cap over the main valve, then
unscrew the threaded protective screw cap (red plastic)
located where the wing coupling is to be connected.
2. Open the main valve on the LPG bottle briefly
(approximately 2 seconds). Do this in an open space
outdoors, i.e. not close to the caravan or the car.
The bottle is now ready to be connected.
Replacing LPG bottle
1. Ensure that all LPG apparatus in the caravan is
switched off.
2. Close the main valve on the LPG bottle and undo the
straps.
3. Unscrew the reducing valve from the bottle by turning
the wing coupling clockwise (left-hand thread).
Checking LPG system
• An authorised workshop should carry out an ”LPG test”
at least once a year. This test includes pressure testing.
• All LPG hoses must also be checked in conjunction
with the annual ”LPG test”. Replace worn and split
hoses. LPG hoses are located in the LPG box and
by the LPG oven, if one is installed in the caravan.
• Perform routine airtightness tests on the LPG system
yourself with the leak indicator, see page 42.
• Check the airtightness between the wing coupling on
the reducing valve and the main valve on the LPG
bottle every time you change the bottle. Use leak
spray, our part no. 500423. If bubbles appear, there
is a leak. Tighten the wing coupling further. If there
are still bubbles, the reducing valve must be replaced.
Remedial measures on the LPG system must
be performed by an expert.
∆
Blow clean the LPG bottle with great care,
and never in the vicinity of the caravan, naked
flames, cigarettes, etc.
∆
4. Prepare the new bottle in accordance with the
instruction ” New/newly filled LPG bottles ”.
5. Replace the LPG bottle and screw on the reducing
valve again.
6. Secure the bottle once more with the straps.
7. Open the main valve.
8. Check that the connection and the bottle’s main valve
are sealed with the aid of leak spray or soapy water.
9. If any of the LPG apparatus was switched on while
the bottle was being replaced, it must be restarted.
Reducing valve Wing coupling Main valve
Shut-off valve Shut-off valve
Gas outlet in the LPG box External gas outlet
43