Natural Gas - BIEMMEDUE SCUDO 235T Manual De Instrucciones

4.8. REGULATING COMBUSTION AND ANALYSING COMBUSTION
PRODUCTS
Warning
The first start-up should always be carried out by a
specialised technician checking the correctness of the
combustion parameters.
Warning
The burner settings are pre-set at the factory and may not
comply with those required, therefore, the settings need to
be checked and, where necessary, corrected.
The adjustment values (gas fuel pressure, burner gas pressure,
combustion head position, air adjustment) for each of the burners
approved for these units are indicated in the "TECHNICAL
SPECIFICATION TABLE".
The probe used to periodically check combustion and flue smoke
temperatures is to be inserted as indicated:
Combustion is clean and stable when combustion values are as
follows:
Index Bacharach
CO
2
Oxygen (O )
2
CO
ma
You may have to change the burner settings due to the fuel used
and/or installation conditions (high altitude, air suction pipe with or
without Snorkel, etc.) if combustion parameters are not correct.
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:
• Raise panel (n) on the electrical panel box;
• Make sure the switch (a) is set to "0";
• Supply electrical power to the space heater by pulling up the
disconnecting switch on the electric power panel: the green lamp
(b) will light up indicating that power is being supplied to the
panel;
•Turn switch (a) to position H or H+V: the burner will begin the start-
up and pre-wash cycle, after which the flame will ignite; after the
combustion chamber has been heating for a few minutes, the
main fan will start up;
L-L 273.01-BM

NATURAL GAS

LIQUID GAS
G20 - G25 G30 - G31
- 0 (white)
8.5 ÷ 9.5 % 11.5 ÷ 12.5 %
4.5 ÷ 6 % 4.5 ÷ 6 %
100 ppm 100 ppm
EN
Warning
The fan runs continuously in H+V mode, even when the
desired room temperature has been reached, and the
burner turns off.
Warning
In H mode, the fan only runs when the combustion
chamber is sufficiently hot. Therefore, when the desired
room temperature has been reached, the burner turns off
and the fan keeps running only until the combustion
chamber has cooled completely.
• If the heater does not work during the start cycle or work cycle,
consult "TROUBLESHOOTING" to find the cause of the
malfunction.
Warning
If the burner goes into safety stop (lamp m) push reset
button (d) for 3 seconds to restart the heater..
Warning
If the safety thermostat goes into safety stop (lamp h),
push reset button (i) 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
Stop the heater by turning 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 working, starting and stopping several times until the
combustion chamber has cooled completely.
Warning
Never stop the heater by simply turning off the
disconnecting switch on the panel.
The electrical supply must be disconnected ONLY when
the fan has come to a complete stop.
5.3. VENTILATION
To run the heater only in continuous ventilation mode, turn switch
(a) to the position with the symbol V.
5.4. TEMPERATURE CONTROLLER
The heater is equipped with a temperature controller (g) with LCD
screen, which displays and controls the following parameters:
• Display of air outflow temperature
• Display of hours of operation
• Control of trip temperature of fan thermostat
• Control of trip temperature of burner thermostat
Display of air outflow temperature
The screen displays the measured temperature in [°C]:
Display of hours of operation
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