elco Bypass R600, Operation And Installation Manual

Page: 18 / 164

Commissioning
Combustion analysis
16
Combustion settings
for natural gas G20 / G25
R601-R607
CO
2, max
% 10.2 ± 0.2
CO
max
ppm < 30
Combustion settings
for LPG G31
Convert boiler before operation
(see coversion kit instruction)
R601-R607
CO
2, max
% 11.9 ± 0.2
CO
max
ppm < 30
Combustion check at full load
Start the boiler in controller stop mode
and go to 50% load. Now the boiler
operates at 50% load. Allow the boiler
to stabilise the combustion for 3
minutes. Then increase the boiler load
step by step up to 100%. Check the
gas pressure on the inlet of the gas
valve while increa-sing the boiler load:
the gas pressure should never go
below the minimum required value

see technical data. Set the minimum
gas pressure switch (1) at 75% of the
required gas pressure.
Check the combustion settings via the
test point in the chimney connection(3).
If necessary, correct the settings with
the flat adjustment screw on the outlet
of the gas valve (2).
Combustion settings
for natural gas G20 / G25
R601-R607
CO
2, min
% 9.4 ± 0.2
CO
min
ppm < 30
Combustion settings
for LPG G31
Convert boiler before operation
(see coversion kit instruction)
R601-R607
CO
2, min
% 10.0 ± 0.2
CO
min
ppm < 30
Combustion check at minimum load
Switch the boiler to minimum load (0%).
Check the combustion settings the
same way as described for full load. If
necessary, correct the settings with the
allen key adjustment screw on either
side of the gas valve (4).
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
2
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 that the boiler is set to auto-
matic operation and controller stop mo-
de is disabled after the combustion test
is finished.
2
4
R601
R602 - R607
1
2
4
3