Ecoflam Max Gas 170 P Mode D'emploi page 10

420010385801 M ax G as 170 - 250 P/ P AB
EN
Adjusting the gas flow rate at the ignition for burners MAX GAS 170-250
The thermal power at the ignition, for such a burners, must be smaller than 120 kW or else than the ratio between the
rated thermal power and control box's safety time (ignition time is assumed equal to safety time, i.e. 3 seconds). The
adjustment of thermal power at the ignition is made by the manufacturer, anyhow, should it be necessary to intervene
on such an adjustment, proceed as follows: - check that the thermal power of the burner at full running is the correct
GAS
G20 (nat.gas)
G25
G30 (buthane)
G31 (propane)
by the F factor (as function of the type of gas used) read on the table at the side. If the value thus obtained is higher
than 120 kW it shall be necessary to reduce the gas valve's initial flow rate. At the end, reconnect the flame detection
cable to its relevant electrode. NOTE: should it be difficult to measure the quantity of delivered litres of gas, due to the
particular meter's dial, it is possible to repeat, sequentially, the above steps many times, so as to reach a significant
amount of gas volume. In such a case, the thermal power at the ignition shall be obtained by multiplying the ratio,
between the amount of delivered litres and the number of cumulated safety times (i.e. the value of the safety time multi-
plied by the number of ignitions) by the F factor. See the following examples: Example A: MAX GAS 170 burner, nat.
gas; rated thermal power of 175 kW; safety time of 3 secs; a sequence of 4 ignitions is made, for a total amount of 41
delivered litres. The thermal power at the ignition, in kW, shall be: 41/(3x4)x34,02 = 116 kW and therefore correct,
being smaller than 120 kW.
To calculate the burner's working output, in kW, proceed as follows:
- Check at the meter the quantity of supplied litres and the duration, in seconds, of the
reading, then calculate the burner's output through the following formula:
ADJUSTING THE AIR PRESSURE SWITCH
The air pressure switch must be adjusted so that an insufficient air flow does not allow
the CO value to exceed 1% in volume. After having adjusted the gas flow and obtained
optimum combustion (CO
pressure switch must be adjusted. Remove the cover with the burner operating, cover
the air intake progressively with a piece of cardboard to obtain a value of CO
(G20-G25)> 13 (G30-G31) and a CO value of less than 5,000 ppm. Adjust the air
pressure switch until the burner shuts down. Remove the cardboard from the air intake
and start up the burner again. Replace the cover.
ADJUSTING THE GAS PRESSURE SWITCH
Adjust the pressure switch to 50% of the rated pressure of the gas used.
RARED PRESSURE:
one. - With the burner switched off, disconnect the flame detection cable from relevant
F
electrode, so as to make the valve to automatically shut off at the ignition, after the safety
34,02
time. - Make a reading on the gas meter. - Start the burner and wait for the burner's lock
-
out, after the repetition of the ignition sequence. - Make a second reading on the meter,
-
and note the number of delivered litres. - The delivered thermal power, at the ignition,
88
will then be equal to the ratio, between the delivered litres and the safety time, multiplied
(LANDIS & STAEFA LGB 21/LGB 22) UP CYCLE
Thermostat
motor
Air pressure switch
Transformer
Gas valve
Flame
CALCULATION OF WORKING OUTPUT OF THE BURNER
= 9.5 to 9.8% and a CO value of less than 75 ppm), the air
2
G 20 = 20 mbar G 25 = 25 mbar
G 30 = 29 mbar G 31 = 37 mbar
‡ 30 s 3 s
0,5 s
Necessary input signal
output signal of the device
e x f = kW
s
pag.10
e =
Litres of gas
s =
Time in seconds
G20 = 34,02
G25 = 29,25
f
G30 = 116
G31 = 88
A
= 10.8
2
B
C
D