Manual Elco R3600 (page 27 of 192) (English, German, Dutch, French, Italian)

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Commissioning

Combustion analysis

Combustion check at full load

Start the boiler at service mode for full

load operation (

W2). When you have

reduced P9 to 50% (see previous

chapter), the boiler will operate at 50%

load. Allow the boiler to stabilise the

combustion for 3 minutes. Then

increase P9 step by step up to 100%.

Check the gas pressure on the inlet of

the gas valve while increasing the

boiler load: the gas pressure should

never go below the minumum required

value  see technical data. Set the

minimum gas pressure switch (1) at

50% of the required gas pressure.

First check the combustion values of

the pilot burner using the measuring

tube on the back of the boiler (3). If

required the values can be corrected

with the adjustment screw on the pilot

gas valve (2).

Then check the combustion values of

the main burner using a measuring

point in the flue (4). If required the va-

lues can be corrected with the adjust-

ment screw (V) on the main gas valve

(5).

Combustion check at minimum load

Switch the boiler to service mode for

minimum load operation (

W1). Check

the combustion settings the same way

as described for full load. The

combustion settings for the pilot burner

can be adjusted using the adjustment

screw on the pilot gas valve (6). The

combustion settings for the main burner

can be adjusted using the adjustment

screw (N) on the main gas valve (7).

Combustion check at 50% load

An additional reference check of com-

bustion values at 50% load is recom-

mended in order to check if the gas

valve is set in such way, that the modu-

lating behaviour is normal. The CO

value should be in between the settings

of full load and minumum load. CO

value should be equal to full load and

minimum load values.

Make sure parameter P9 is set back to

100 and switch the boiler to automatic

operation (

F) after the combustion test

is finished.

Combustion settings

for natural gas G20 / G25

All boilers

2, max

% 10.0 ± 0.2

max

ppm < 1000

Pilot burner

2, min

% 10.2 ± 0.2

min

ppm < 1000

Combustion settings

for LPG G31

All boilers

2, max

% 11.0 ± 0.2

max

ppm < 1000

2, min

% 11.2 ± 0.2

min

ppm < 1000

Pilot burner

Parameter change required

P19 : 100%  86%

Combustion settings

for natural gas G20 / G25

All boilers

2, max

% 10.0 ± 0.2

max

ppm < 30

Main burner

2, min

% 9.3 ± 0.2

min

ppm < 30

Combustion settings

for LPG G31

All boilers

2, max

% 11.0 ± 0.2

max

ppm < 30

2, min

% 11.0 ± 0.2

min

ppm < 30

Main burner

Parameter change required

P19 : 100%  86%

5 7

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Elco R3600 Manual

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