Ecoflam MAX GAS 350 P Mode D'emploi page 17

PRELIMINARY CHECKS
Before starting up the boiler check the following: - gas type and feed pressure; - gas valves closed; - the seals in the pipe
fittings; - gas pipe breather and input pressure; - that the cable complies with the diagram and the phase and neutral
wires correspond; - that the burner shuts down when the boiler thermostat opens; - the seal of the boiler furnace which
prevents air from entering; - the seal on the flue-boiler pipe fitting; - the condition of the flue (sealed, free from blocka-
ge, etc ). If all these conditions are present, start the burner. The control device starts the motor to carry out prewashing
of the combustion chamber. During this prewash period (about 30 seconds) the device checks that air pressure is correct
via the air pressure switch. At the end, it supplies power to the transformer and opens the gas valves. The flame must be
lit and stabilize within 3 seconds, which is the device's safety time limit. Check to ensure the flame is lit before placing
any control instrument in the flue. Adjust and check the gas flow necessary for the boiler at the meter. Adjust the air
flow according to the gas flow to obtain correct combustion.
IMPORTANT ADVICE
All adjustable parts must be fixed by the installer after making adjustments. Check flue combustion after each adjusti-
ment. The CO values must be approx. 9.7 (G20) 9.6 (G25 11.7 (G30) 11.7 (G31) axld the CO must be less than 75
2
ppm.
Adjusting the gas flow rate at the ignition for burners MAX GAS 350-500
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
one. - With the burner switched off, disconnect the flame detection cable from relevant electrode, so as to make the
valve to automatically shut off at the ignition, after the safety time. - Make a reading on the gas meter. - Start the bur-
ner 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, will then be equal to
the ratio, between the delivered litres and the safety time, multiplied 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 F
G20 (nat.gas) 34,02
G25 -
G30 (buthane) -
G31 (propane) 88
time multiplied by the number of ignitions) by the F factor.
CALCULATION OF WORKING OUTPUT OF THE BURNER
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:
STARTING-UP THE BURNER
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 ther-
mal 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
420010400701 Max Gas 350 - 500 P/P AB
e x f = kW
s
17
e =
Litres of gas
s =
Time in seconds
G20 = 34,02
G25 = 29,25
f
G30 = 116
G31 = 88
EN