BIEMMEDUE BH 50 Betriebsanleitung Seite 28

4.6. CONNECTION TO EXHAUST DUCT
Exhaust ducts must be in steel and conform to EN 1443.
Efficient combustion and trouble-free working of the burner depend
on efficient flue draft. The unit must be connected to the chimney
flue in compliance with current legal regulations and in line with the
following guidelines:
• the flue must be as short and possible and with ascending slope
(minimum height 1 m);
• There should be no sharp curves in the pipes, and the diameter of
the pipes must never be reduced;
• there must always be a wind deflector to prevent the entrance of
rain and to prevent smoke from being blocked by the wind;
• Flue draft must at least equal the level in the Technical
Specifications.
• Every heater must have its own chimney;
The following diagrams show possible flue positions:
Warning
Coaxial flue pipes must not under any circumstances be
used for flue gas exhaust and burner air suction on these
units: functioning may be irreparably compromised.
NO
L-L 196.04-BM
A) Minimum 1 m
B) As short as possible
C) Minimum 1 m
D) Chimney draught H shape
EN
4.7 REGULATING COMBUSTION AND ANALYSING COMBUSTION
PRODUCTS
Warning
The factory setting of the burner is indicated in the
"TECHNICAL SPECIFICATIONS TABLE" and highlighted in
grey.
You may have to change the setting due to the fuel used and/or
installation conditions (high altitude, air suction pipe with or without
Snorkel) if combustion parameters are not correct.
The sensor used to periodically check combustion and smoke
temperature must be positioned as follows.
Combustion is clean and stable when combustion values are as
follows:
Smoke index: 0
Oxygen (O
Excess air: 35 ÷ 45 %
When inspection tests are completed, the hole drilled for the probe
must be sealed with a material that is resistant to high
temperatures and that ensures the tube remains airtight.
5. OPERATING INSTRUCTIONS
5.1. START
To start the heater:
• Make sure the switch (a) is set to "0";
• Power the heater electrically by switching on the isolation switch
on the power switch board: red lamp (b) lights to signal that the
board is live;
• Press switch (a) to position
prewash cycle and, when the flame lights, lamp (f) lights as well;
after the combustion chamber has heated for a few minutes, the
main fan starts;
• If the heater does not work during the start cycle or work cycle,
consult "TROUBLESHOOTING" to find the cause of the
malfunction.
Warning
In case of safety stop, you have to push the reset button
(d) for 3 seconds to restart the heater.
Warning
NEVER do more than two restarts in a row: unburned fuel
can accumulate in the combustion chamber and suddenly
flare up at the next restart.
5.2. STOP
To stop the heater turn and press switch (a) to "0" position or, if the
heater is in automatic mode, by setting the room thermostat to a
lower temperature: the burner shuts off and lamp (f) goes out. The
fan keeps running until the combustion chamber has cooled
completely.
): 4 ÷ 6 %
2
: the burner begins the start and
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