Alde Compact 3030 Installationsanleitung Seite 37

4. Planning installation of the Alde Compact 3030 / 3030 Plus system
One or two general rules must be followed to get the most efficient heating system possible.
Air circulation
To make the most efficient use of waterborne heating, air must be able to pass freely through air gaps
under the bed boxes, behind the backrests/cushions and wall cabinets. If the vehicle has e.g. fitted
carpets, check that they do not prevent air supply to the convectors. It is also important that curtains,
cushions and blankets do not prevent air circulation behind seatback cushions and wall cabinets.
Air gap shape
Air gaps between walls and furniture must have a sealed, smooth surface on both sides, narrower at
the top (approx. 20-25 mm) to increase air speed. At the bottom, they must fit closely around the con-
vector. A narrowing angle between walls and furniture is recommended. Also, air flow to the convectors
must be unobstructed and have a gap of at least 40 mm. Air gaps in wall cabinets must be at least
20 mm at the bottom edge, and have a sufficiently wide top edge to ensure adequate air circulation.
Fig. 2, Air gap shape
Venting (exhaust)
Venting nipples must be positioned carefully to facilitate venting of the system.
Because of the complexity of a system with dual zones, this aspect is extra important.
Venting nipples must be located at sufficiently high points on the glycol line, so that air is easily vented
from the system. For a dual-zone system, it is important that venting nipples are located in both zones.
Number of convectors
A sufficient number of convectors should be used. A simple way of calculating this is to multiply the
vehicle length by 1.5.
Example: If the vehicle is 6 metres, a total of 9 metres of convectors is required. But this is only a rule
of thumb. To be sure of the right result, a cold chamber test is required, as there are many factors that
determine how efficiently a vehicle is heated, such as its insulation, shape, interior fittings, etc.
Placement, convectors
Convectors should be evenly distributed around the vehicle. Locate them between outer walls and fur-
niture, at least 100 mm from the floor, and under each window. Convectors may also be placed under
false floors. If needed, extra convectors can also be placed on top of each other.
A one-metre convector equates to approx. 400 W; if one convector is placed above another, the output
is 100% on the lower and 50% on the upper.
Example: If two one-metre convectors are placed on top of each other, you will get around 400 W +
200 W (total approx. 600 W).
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