Laars DP2000 Installation, Operation And Service Manual - page 16
Page 16
Measure the C0
2
- If it measures less than 11.5%,
decrease the air supply. If it measures higher than
12.5%, increase the air supply.
When the fuel-air setting is correct, there will be
zero smoke. If there are still traces of smoke after
adjusting the fuel-air mixture, slowly increase the air
supply until the smoke disappears.
Use the proper instruments to measure both the
smoke and C0
2
.
1.
Too Much Air (low C02)
Too much air decreases the efficiency of the
heater, and causes overheating of the jacket by
pressurizing the firebox. Too much air can also
cause poor ignition and a pulsating flame. If the
C02 reading is below 11.5%, reduce the air
adjustment openings on the burner.
2.
Not Enough Air (high C02)
Not enough air is much easier to detect. The
flame is dark yellow and the heater will smoke.
Generally, the C02 reading will be above 12 %
when not enough air is provided.
Lacking proper instruments, a temporary fuel-air
adjustment can be made. Close the end shutter
and then slowly close the air bank until the heater
starts to smoke. Slowly open the end shutter until
the smoke completely disappears. The fuel-air
mixture will be close to the correct setting.
4E-5. Regular Maintenance
1.
At least once during the pool heating season, or
every six months, remove accumulated soot from
the heat exchanger. Remove the top of the heater
and lift out the flue collector. Remove the “T’
baffles (the retaining wire does not have to be
replaced). Brush the soot and ash from the
spacing between the fins using a brush across the
top. Clean the underside through the inspection
hole. Use a bottle brush to clean the spacing
between the tubes. Remove all of the ash and soot
that has fallen to the bottom of the heater with a
vacuum cleaner.
Figure 21. Electrode Adjustment.