Ecoflam MAX GAS 350 P TW ТC - VCS-125 350/500 [22/76] Adjusting the air pressure switch

Ecoflam MAX GAS 350 P TW ТC - VCS-125 350/500 [22/76] Adjusting the air pressure switch
-1,0
0,0
1,0
2,0
3,0
4,0
5,0
6,0
7,0
8,0
50 100 150 200 250 300 350 400 450 500 550 600
pressione camera di combustione mbar
kW
11,5
12
12,5 13 14 15 16
1 2 3
5
4
posizione testa
pressione gas in testa mbar
PRE-CALIBRATION MAX GAS 500
-1,0
0,0
1,0
2,0
3,0
4,0
5,0
6,0
7,0
8,0
50 100 150 200 250 300 350 400 450 500 550 600
pressione camera di combustione mbar
kW
11,5
12
12,5 13 14
15 16
1 2 3
5
4
posizione testa
pressione gas in testa mbar
EXAMPLE OF PRE-CALIBRATION MAX GAS 500
Warning: the pre-calibration values have been
determined on EN676 test combustion cham-
bers in ideal conditions, and are useful for the
first switch-on but must be checked and correc-
ted with calibration for the individual system.
Example in figure:
Power required by the generator: 380 kW.
Pressure envisaged in combustion chamber: 3.5
mbar. Combustion head chamber: 2.5 (between
2 and 3). Gas pressure in head: 13 mbar.
Gas pressure in head
Head position
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
2
= 9.5 to 9.8% and a CO value of less than 75 ppm), the air
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
2
= 10.8
(G20-G25)> 13 (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: G 20 = 20 mbar G 25 = 25 mbar
G 31 = 37 mbar
0
,4
0
,6
0
,
9
3
,0
1,5
2,1
1
,
8
2
,4
2
,
7
1
,
2
A
B
2,5
5
1
0
1
5
5
0
25
35
3
0
4
0
4
5
2
0
C
D
Pressure in comb. chamber
Gas pressure in head
Head position
Pressure in comb. chamber
EN
420010318203 Max Gas 350 - 500 P/P AB
22

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