Absolute ABS-1500 - Combustion Setting and Adjustment

Absolute Boilers ABS 1500-2000-2500-3000-4000
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7.3 Combustion setting and adjustment
Factory combuson readings Chart 8
Set point
High re ABS 1500 ABS 2000 ABS 2500 ABS 3000 ABS 4000
CO2 9.7 9.58 9.3 9.3
CO ppm 65 87 65 54
O2 3.6 9.58 4.3 4.3
Factory combuson readings Chart 8
Set point
Set point
Low re ABS 1500 ABS 2000 ABS 2500 ABS 3000 ABS 4000
CO2 7.8 7.96 8.63 7.4
CO ppm 23 12 5 15
O2 7 6.6 5.5 7.7
Check and correct, if necessary, the boiler for correct gas/ air rao set-up. Checking takes place on full and part load, ad-
justment takes place only on the gas valve mono block. For checking and adjusng are required: an electronic CO2-gauge
(on the basis of O2) and a gas pressure gauge. Note that the opening (see g. 23) around the measuring probe is sealed
properly during measurement. Note also that measuring the O2 levels in the ue gas is necessary, because direct mea-
surement of CO2 can lead to inaccuracies due to varying CO2 levels in the natural gas. Connect the gas pressure meter
between measuring point PG on the underside of the gas valve mono block and measuring point PL on the venturi (see
g. 23), ensuring the connecons are gas ght.
Check CO2- percentage (O2-percentage) against table
8. If the values exceed the given tolerances, adjust according to g. 23. Check the ame through the inspecon glass, the
ame must not blow o.
Check the ame through the inspecon glass, the ame must not blow o. Repeat the check starng from point