Absolute Boilers ABS 1500-2000-2500-3000-4000
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To adjust low fire:
Required tools- 2.5 mm hex wrench and combustion analyzer
Start the boiler and observe proper settings for the system. Set the boiler to low fire, to achieve minimum firing rate
of the boiler.
A- Check the combustion readings on the combustion analyzer. If the combustion readings are not within the not
within the range specified, adjust as follows
1- Open the front panel of the boiler
2- Locate the Karl Dungs gas valve
B- Turn the offset screw, located in the bottom center of the side of the valve, in the direction indicated on the label to
increase or decrease the natural gas flow. Increasing the gas decreases the O2, while decreasing the gas increases
the O2. There will be a slight delay of 30 seconds from the time the adjustment is made until the gas combustion
reads alter. It is best to make small adjustments of 1 indication marker every 30 seconds to allow the combustion
to stabilize before making further adjustments. When desired adjustments are complete, do a final test and adjust
low fire if necessary.
High fire adjustment screw
Low fire adjustment screw
Summary of Contents for ABS-1500
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