4 Planning and installation – Connections
45
To compensate for irregularities in the flue draught of the chimney,
HDG Bavaria recommends installing an auxiliary air unit in the flue
pipe, or even better, in the chimney itself as shown in Figure 4/7 -
Connection to the chimney.
The following should also be considered:
•
The connecting piece may not protrude into the chimney.
•
If the system flue pipe has a larger diameter than the chimney, the
connecting piece must reduce to the diameter of the connection.
In this case, the cone of the connecting piece should taper as nar-
rowly as possible.
•
Use bends rather than elbows; the radius of the elbow may not be
less than the diameter of the pipe.
•
The chimney should be vertical and straight, if possible without
kinks (take particular care in older buildings).
•
All of the cleaning and measurement hatches on the chimney
must have tight seals.
•
To reduce the entry of additional cold air, only one heat source
should be attached to each chimney.
•
To prevent dust from escaping, the flue pipe must be sealed with
heat-resistant silicone.
E
LECTRICAL
SYSTEM
The directives of 2006/95/EC (low voltage guidelines) must be fol-
lowed for the electrical connections to the system.
No electrical installations, such as power sockets, distribution boxes,
lights or light switches may be located in the fuel bunker. Any lights
must be suitable for use in areas at risk of explosion. The VDE regula-
tions for rooms with a risk of dust explosion must be followed.
✎
The required connection values are described in chapter “3 Mode
of operation”, section “3.3 Technical data”.
1 Auxiliary air unit
2 Cleaning door
A) Chimney approx. 30° - 45°
B) Clearance at least 50 cm.
Figure 4/7 - Connection to the chimney
2
A
B
1
Summary of Contents for Compact 25
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