BIEMMEDUE BH 50 GAS Manual De Instrucciones página 35

6.5 CHECKING AND TESTING THE BURNER
To reach the burner:
• Remove the two side fixing screws (A) on the fan group, slide the
fan group (B) backward and rotate it downward.
• Remove the burner and follow the checking and cleaning
instructions in the burner manual.
• Reinstall the burner.
• Run the procedures described in paragraphs 4.7 and 4.8 to
measure combustion parameters and check that combustion is
stable and clean.
6.6 CHECKING THE THERMOSTATS
Inspect the fan thermostat and manual reset safety thermostat as
follows:
• Remove the side inspection panel
• Find the two thermostats attached to the front wall of the
combustion chamber
• Clean with a dry cloth, taking care not to damage the thermostats
• Close the side inspection panel
Inspect the burner thermostat as follows:
• Remove any air outlet connection ducts
• Clean with a dry cloth, taking care not to cut or bend the capillary
tube.
6.7 CLEANING THE INTERIOR OF THE HEATER
For thorough cleaning, the heater can be cleaned and washed inside
and outside with water. Always do as follows:
• disconnect the electrical cable and remove it from the outlet
• completely close all access panels
• do not use water jets at a pressure exceeding 70 bar at a distance
less than 30 cm
• completely dry all parts before reconnecting the electrical cable
6.8 CLEANING THE COMBUSTION CHAMBER
To maintain the burner's high efficiency and prolong its life, the
procedure described in this paragraph must be done at least once at
the end of the work season or more frequently if there is an
excessive build-up of soot. Excessive soot may be caused by poor
chimney draught, poor fuel quality, poor regulation of the burner, or
more or less frequent alternation of burner starts and stops. Pay
attention during operation: pulsations at start may be due to
excessive amounts of soot.
To access the combustion chamber:
• Remove the two side fixing screws (A) on the fan group, slide the
a
b
d
L-L 195.04-BM
EN
fan group (B) backward and rotate it downward.
• Remove the burner
• Clean with compressed air or a metal brush
Warning
In case of serious malfunction, the electronic equipment causes the
heater to go into safety stop, and lamp (d) lights with a steady red
light (stop light).
Warning
Warning
In case of safety stop, press the reset button (d) for at least 7
seconds to launch a self-diagnosis programme, after which the
button will flash at different rates (Self-diagnosis lamp) according to
the type of safety intervention: the synoptic on the electrical panel
shows the possible types.
If the combustion chamber overheats, the safety thermostat (7)
trips to shut off the burner and lamp (b) lights: to reset the burner,
you have to shut off the heater completely, cut electrical power,
remove the side inspection panel and push button (7).
Warning
If the heater is still not working properly, please contact your
nearest dealer or authorized Service Centre.
f
e
After any technical work, always check that the heater
works correctly.
7. TROUBLESHOOTING
In case of a safety stop, you have to push the reset button
(d) for 3 seconds to restart the heater.
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.
You must always find the cause of the safety intervention
and remove it before pushing reset button (d) or button (7)
and restarting the heater.
7
35 / 76