Absolute ABS-1500 - Page 53

Absolute Boilers ABS 1500-2000-2500-3000-4000
53
To adjust low re:
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 re, to achieve minimum ring 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 specied, adjust as follows
1- Open the front panel of the boiler
2- Locate the Karl Dungs gas valve
B- Turn the oset 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 ow. 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 nal test and adjust
low re if necessary.
High re adjustment screw
Low re adjustment screw