Webasto Cool Top Trail 20 Notice D'utilisation Et D'installation page 6

5 | Installation instructions
5 Installation instructions
5.1 General
l Thoroughly read and understand this manual before install-
ation.
l Do not add any other parts or modify the product in the in-
stallation.
l Consult Webasto or the local distributor in case of unusual
applications or installation conditions that are not specific-
ally covered by this manual.
WARNING
If a heater exhaust pipe is mounted through the roof
nearby the A/C unit, then the exhaust pipe must be ex-
tended 10 cm above the A/C unit.
5.2 Installation requirements
l The vehicle roof must be able to support the weight of the
air conditioner.
l The minimum thickness of roof is 25 mm; the maximum
thickness of roof is 70 mm.
l The roof must be level and smooth.
5.3 Different cut-out sizes
The installation is possible for different cut-out sizes.
To install instead of a 400x400 mm roof hatch:
1. Dismount the roof hatch and use the remaining cut-out.
2. Remove sealant residue and unevenness.
3. Fill in the screw holes with flexible non-hardening butyl
body sealant.
4. The adaptor frame for 400x400 mm cut-outs is part of the
scope of delivery.
To install instead of a 360x360 mm roof hatch:
1. Dismount the roof hatch and use the remaining cut-out.
– Either you have purchased a unit with a 360x360 ad-
aptor frame or you must buy the optional adaptor frame
for such cut-outs. You can use it instead of the 400x400
mm adaptor frame.
2. Remove sealant residue and unevenness.
3. Fill in the screw holes with flexible non-hardening butyl
body sealant.
To create a new cut-out:
Depending on the size of the adaptor frame you need to create
the corresponding cut-out in the roof.
Consult the vehicle manufacturer for the most suitable way and
position for a new cut-out.
6 / 155
5.4 Installation position
Fig. 5 Installation direction of the outdoor unit
Consider the installation position before installation:
l The intended location must not interfere with existing
structures and cables.
l The air conditioner must be installed as close as possible to
the centre of the roof.
l The installation position of the outdoor unit must be con-
sistent with the traveling direction (F) of the vehicle.
l Make sure that there is sufficient room on the inside of the
vehicle to install the air distributor.
l Consider the installation position of the air distributor and
make sure its outlets are at least 400 mm away from cup-
boards, walls and bulkheads which could redirect condi-
tioned air back towards the return air intake. If an outlet is
less than 400 mm from an obstruction, then it should be
sealed closed. Failure to do so will result in a unit that fre-
quently cycles on and off.
l The cut-out must avoid roof cladding joints where possible.
l Choose an installation position between two longitudinal
supports or sections, if present.
l There must be a minimum of 100 mm clearance all around
the rooftop unit to ensure suitable air flow and access for
maintenance.
WARNING
When a hatch with safety ventilation function is re-
placed by the air conditioner, you must make sure that
the safety ventilation is restored in another location.
NOTE
The angle of inclination of the air conditioner must not
be greater than 5° (= 8.8%) and the rear of the air con-
ditioner must not be higher than the front.
The following illustrations (Fig. 6, Fig. 7 and Fig. 8) show the re-
quired installation space for the outdoor unit and the air distrib-
utor on the inside for the two different cut-out versions. Centre
the air distributor by using the cut-out.
NOTE
All measurements are in mm, unless stated otherwise.
9039408E_OI-II_Cool Top Trail 20-24