GY20, GY21 Intended use
7
4 Intended use
The roof vents GY20 (item no. 9107300319) and GY21 (item no. 9107300005) are
designed for installation in caravans, motorhomes and boats.
5 Technical description
The GY20 and GY21 roof vents are for ventilating the interiors of caravans, motor-
homes 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.
6 Mounting the roof vent
Note on installation location
• The vent should be mounted on the roof on a level surface. When mounted 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 running. The vent must be
installed freely accessible to the wind, regardless of the wind direction – this
means not positioned next to towering obstacles (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, page3).
• 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
2
.
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).
GY20-21-16s.book Seite 7 Freitag, 16. Dezember 2016 3:58 15
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