HDG M299, Operation Manual

Page: 37 / 176

4 Planning and installation – Connections
37
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 4/4 -
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 connecting piece should taper as gently 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
deformations (take particular care in older buildings).
• All of the cleaning and measurement hatches on the chimney
must be tightly sealed.
• To reduce the entry of additional cold air, only attach one heat
generator per chimney.
• To prevent dust from escaping, the flue pipe must be sealed with
heat-resistant silicone.
E
LECTRICAL SYSTEM
The directive 2006/95/EC (low voltage guideline) must be followed
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 storage. Any lights
must be suitable for use in areas at risk of explosion. The VDE
regulations 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”.
C
ONTROL CABINET
The HDG Control unit is located in the EMD-C215 Exclusiv control
cabinet. The cables are inserted from the top of the control cabinet
and the wiring is connected in accordance with the supplied wiring
diagrams.
A
CCUMULATOR SENSOR
The temperature sensors are immersion sensors with a moulded
cable and serve to measure the temperature of the accumulator.