Exhaust System - Webasto Air Top 2000 ST Installation Manual

Air Top 2000 ST - Air Top Evo 40/55 Regulation for Installation in the Vessel
• Fuel-carrying components must be protected against excessive heat and are to be installed so that any
drippings or evaporating fuel can neither accumulate nor be ignited by hot components or electrical
equipment.
• The fuel tank must be equipped with a vent cap or ventilated in another way (vent line).
• The fuel filler neck may not be located in the interior of the boat and must be provided with a well-sealing
cap to prevent fuel from escaping (requirement from 2001/56/EC).
• If the heater takes the fuel from a separate additional tank, then the fuel type and the filler neck must be
clearly marked (requirement from 2001/56/EC).
• A label must be affixed to the fuel fuller neck warning that the heater must be switched off before
refueling. An identical warning must also be included in the manufacturer's operating instructions.
2.6 Exhaust Gas System
• Exhaust gas outlet: on sailing vessels to be located at the upper stern (due to heeling) on motor boats on
the sides (owing to submerging of the upper stern)
• Install exhaust gas outlet at least 500 millimeters (20 inches) above the water line
• Always route lines with a goose-neck bend (see Fig. 21) preventing water from entering the system when
the vessel is heeling
• Always use a sealed exhaust muffler (if applicable to your installation)
• Maximum overall length of the exhaust tube is 5 meters (16.5 feet) without muffler or 2 meters (6.5 feet)
with a muffler installed.
• The total radius of bends should not exceed 270 degrees (large radii to be selected)
• Always insulate the exhaust tubes
• A condensation water drain is necessary with exhaust line lengths greater than 3 meters (10 feet) and
optional on shorter lengths (see Fig. 21) (drain to be filled with water after installation)
• Do not route exhaust components within 100 mm (4 inches) of flammable materials such as fuel system
components, polyurethane or similar foam insulation, styene sheet installation, wood and paper products,
carpet, glycol reservoirs, coolant lines, electrical wiring, etc.)
2.7 Combustion Air System
• Air to be drawn from ventilated foredeck box or ventilated locker or *engine room (*Diesel engines only)
• Check that intake openings are unobstructed
2.8 Heating Air Intake
• Air to be drawn from ventilated foredeck box or ventilated locker, not from the engine room (ensure that
intake openings are kept unobstructed)
• Optionally, fresh air or recirculated air may be drawn in using a distributing piece with control flap
(Webasto accessory)
2.9 Hot Air Circulation
CAUTION!
When heater is in use, the surface of the hot air outlet may become hot to the touch. Contact with
skin may cause burns.
• In the saloon, large, non-closable air outlet nozzles are to be used
• In backrooms, use small air outlet nozzles; they may be closable
• At least one air outlet nozzle with an outlet diameter appropriate for the heater must always be open
• Keep length of the air duct lines as short as possible to achieve good heat circulation without excessive
flow restriction on the heating system overall
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