Hot Air Distribution - Webasto DUAL TOP RHA 100 Installation Instructions Manual

Hot air system
9.2.

Hot air distribution

Design an air distribution system that allows an even distribution of heat
into all heated sections of the vehicle. Design the system in such a way that
the air flow through both heater outlets is quite similar.
See the Webasto air and water heaters accessory catalogue for branches,
connecting pieces, Y-junctions, outlets, etc. made of high temperature
resistant materials.
The heater's outlet cap (see Fig. 2) provides two hot air outlets, to which
the hot air hoses have to be connected.
Both hot air outlets have to be used.
The internal diameter of the main section of the two hot air channels has
to be 80 mm.
Guide the hot air with 80 mm hoses directly from the heater into the
interior.
• Connect the 80 mm hoses to the outlet cap (see Fig. 2) of the heater.
• Connect the whole air distribution system using air dividers and
reducers. Drill holes in furniture and floor where necessary.
Through an appropriate selection of branches and diameters the air
flow and thus the heat flow can be influenced.
• Seal the gap between floor and hose, in case the hose is going from the
exterior to the interior of the vehicle.
• Mount Webasto air outlets at the end of each hose.
• Insulate hot air hoses routed outside the vehicle.
• In case hot air hoses inside the interior are NOT running through closed
compartments or areas, cover them to prevent damaging the hose and
accidental touching.
20
• Secure the hoses at all connection points with hose clamps.
• Fasten the hoses to the wall or floor using hose clips.
NOTE:
• The length of the hot air distribution hoses (each outlet of the heater)
must be at least 0.80 m;
• To minimize thermal losses, the length of hot air distribution hoses
running outside the interior should be as short as possible;
• Hose routing: as straight as possible, large curves;
• Avoid compressing or pinching the hot air hoses;
• Not more than 30% of the total number of outlets shall be closable;
• Arrange outlets in such a way that they do not get blocked;
• Free flow into the interior enables the best interior heating and air
circulation;
• Position of the outlets close to the floor for best air circulation.
WARNING:
Risk of fire. Only use high temperature resistant Webasto hot air hoses.
The hot air opening is to be positioned in such a way that the air is not
blown on to any parts that cannot withstand the heat.
Dual Top