Dometic RM 7390 (L) - Manual (Page 21)

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In this case, for gas operation, do not use the upper winter cover!
If even with draught-free installation a fume chimney is desirable, you must incorporte
the L100 ventilation and extraction system into the upper air vent opening.
Installation of fume chimney: please refer to point 6.7.
Ventilation and air extraction
A correct installation is important for correct operation of the appliance to ensure, there
is no a build-up of heat at the back of the appliance; this heat must be allowed to escape
into the open air.
In the event of high ambient temperatures, full performance of the cooling unit
can only be achieved by means of adequate ventilation and extraction.
Installing the ventilation system
Deviations shall require the consent of the
manufacturer.
6.3
15-20mm
Correct mounting of the lower ventilation grille facilitates the access
to the electrical and gas connections during maintenance work.
Ventilation is provided for the unit by means of two
apertures in the caravan wall. Fresh air enters at the
bottom, extracts the heat and exits through the upper
vent grille.
The upper ventilation grille should be positioned as
high as possible above condenser (A).
The lower ventilation grille should be flush with the
floor of the vehicle, allowing any gas leakages (hea-
vier than air) to escape directly into the open air.
If such an arrangement is not possible a hole must be
provided under the refrigerator (not close to the bur-
ner) so that any leaking LP gas can escape. This must
have an effictive area of at least 13cm². It is desirable
to fit the hole with wire mesh or similar, and an angle
plate to protect it from stones, mud etc., the wire mesh
must not reduce the effective area of 13cm² ( EN
1949).
The ventilation grilles must have an open cross-
section of at least 250 cm². This is reached using
the Dometic Absorber Ventilation and Air
Extraction System L100 / L 200 that has been
tested and approved for this purpose.
Comment:
If the distance between the wall and the refrigerator is
greater than 20 mm the gap can be reduced to 20 mm
by fitting a suitable baffle piece.
13cm²