AERCO KC1000 Low NOx Boiler equipped with C-More 2003 - Manual (Page 34)

INITIAL START-UP
4-4
18. Oxygen levels at the 16% firing rate should
be as shown in Table 2 (page 4-5). Also,
ensure that the CO and NOx readings do not
exceed the values shown. No adjustment
should be necessary. Contact the Factory if
the oxygen, CO or NOx levels are not within
the specified ranges.
NOTE:
At a 100% firing rate, the KC1000 will not
operate reliably at inlet air temperatures below
55°F if the Cold Air Damper (P/N 99026) is not
installed. See paragraphs 2.10.2 and 2.10.3.
19. Change the firing rate to 100% and allow the
combustion analyzer to settle. If the optional
Cold Air Damper (P/N 99026) is installed,
compare the measured oxygen level with the
levels in Table 3. If the Cold Air Damper is
not installed, compare the oxygen levels with
the readings in Table 3A.
20. If the measured oxygen reading is below the
oxygen range in Table 3 (or 3A), loosen the
two bolts that secure the inlet air shutter to
the unit using a 7/16” wrench (see Figure
4.4). Open the shutter 1/4” to 1/2” to
increase the oxygen level, then tighten the
nuts.
BLOWER
OUTLET
BLOWER
INLET
SCREEN
SHUTTER
SHUTTER
LOCKING NUTS
Figure 4.4
Air Shutter Locking Nut Location
21. Wait for the analyzer to settle then compare
the new oxygen reading to Table 3 (or 3A).
Repeat the inlet air shutter adjustment until
the oxygen is within the specified range.
Also, ensure that the CO and NOx
emissions do not exceed the values shown.
Firmly tighten the inlet air shutter locking
nuts when finished.
REMINDER:
At 30% firing rate, adjust only the differential
pressure regulator. At 100% firing rate, adjust
only the inlet air shutter.
22. If the measured oxygen reading is above the
oxygen range in Table 3, loosen the two
7/16" locking nuts securing the inlet air
shutter. Close the air shutter 1/4” to 1/2” to
decrease the oxygen level and tighten the
two nuts.
23. Allow the analyzer to settle then compare the
new oxygen reading to Table 3 (or 3A).
24. Repeat the adjustment until the oxygen is
within the specified range. Also, ensure that
the CO and NOx readings do not exceed the
values shown. Firmly tighten the inlet air
shutter locking nuts when finished.
NOTE:
Adjust the inlet air shutter only at 100% firing
rate. Do Not adjust the differential pressure
regulator.
25. Change the firing rate to 30%. Allow time for
the combustion analyzer to settle. Check the
measured oxygen level, CO and NOx
emissions to ensure that they are still within
the ranges shown in Table 1.
26. Continue these procedures until all oxygen
levels are within the ranges specified in
Tables 1, 2 and 3 (or 3A) on page 4-5.
27. Record all readings on the AERCO start-up
sheet provided with each unit. Proceed to
paragraph 4.5 when all natural gas
combustion calibration procedures are
completed.