Technical Description; Mounting The Roof Vent - Dometic GY20 Instructions De Montage Et De Service

GY20, GY21
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Technical description

The GY20 and GY21 roof vents are for ventilating the interiors of caravans,
motorhomes and boats. They can also be used in toilets, kitchens, above gas
and paraffin lamps and in shower rooms. The cover cap is weatherproof and
has a flyscreen.
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Mounting the roof vent

Note on installation location
 The vent should be mounted on the roof on a level surface. When mount-
ed on a sloping surface, the roof hood must be rotated so that one of the
three water drainage holes is directed toward the incline. A tilt angle up to
20° will not affect the performance of the vent when the motor is not run-
ning. The vent must be installed freely accessible to the wind, regardless
of the wind direction – this means not positioned next to towering obsta-
cles (fig. 1, page 3).
 The vent is designed for a roof 25 – 45 mm thick. If the roof is thinner,
parts of the vent can be shortened (fig. 3 A/B, page 3).
 The vent removes air from the interior. Make sure there is an adequate air
supply! The air intake opening must be at least 60 cm
Mounting the vent
➤ Select an appropriate installation location for the vent on the roof.
➤ Draw the location and size of the opening of 130 mm diameter (fig. 2,
page 3).
➤ Pre-drill and cut out the hole on the roof carefully with a keyhole saw or
similar tool.
➤ Place the vent (fig. 3 1, page 3) on the opening and mark the two screw
holes.
➤ Attach the vent (fig. 3 1, page 3) with the two screws (fig. 3 2, page 3).
EN
Technical description
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