AERCO KC1000 Boiler equipped with C-More 2002 - Manual (Page 44)

INITIAL START-UP
4-4
12. If the measured oxygen level is within the
range in Table 1, no adjustment is
necessary. Proceed to step 17.
13. If the measured oxygen level is below the
range in Table 1, rotate the differential
regulator adjustment tool counterclockwise
1/4 to 1/2 revolution to decrease gas flow.
14. Wait for the combustion analyzer to settle,
then compare the new oxygen reading to
Table 1. Repeat adjustment until oxygen is
within the specified range.
15. If the measured oxygen level is above the
oxygen range in Table 1, rotate the
differential regulator adjustment tool clock-
wise 1/4 to 1/2 revolution to increase gas
flow.
16. Wait for the analyzer reading to settle, then
compare the new reading to Table 1. Repeat
adjustment until oxygen is within the
specified range.
NOTE:
Adjust only the differential regulator at 30%
control signal; do not adjust the air shutter.
17. Once the oxygen level is within the specified
range at 30%, change the firing rate to 16%.
18. Oxygen levels at the 16% firing rate should
be as shown in Table 2. No adjustment
should be necessary. Contact the Factory if
the oxygen or carbon monoxide levels are
not within the specified range.
Table 2
Combustion Oxygen Levels for a 16%
Firing Rate
Inlet Air
Temp
Oxygen
(+0.2/-1.0)
Carbon
Monoxide
-20°F <12 % <50 ppm
0°F <12 % <50 ppm
10°F <12 % <50 ppm
30°F <12 % <50 ppm
50°F <11 % <50 ppm
60°F <11 % <50 ppm
70°F <11 % <50 ppm
80°F <11 % <50 ppm
90°F <10 % <50 ppm
100°F <10 % <50 ppm
19. Change the firing rate to 100%. After the
combustion analyzer has settled, compare
the measured oxygen level with the levels in
Table 3.
20. If the measured oxygen reading is below the
oxygen range in Table 3, loosen the two
bolts that secure the inlet air shutter to the
unit using a 7/16” wrench (see Fig. 4.4).
Open the shutter 1/4” to 1/2” to increase the
oxygen level, then tighten the nuts.
21. Wait for the analyzer to settle then compare
the new oxygen reading to Table 3. Repeat
the inlet air shutter adjustment until the
oxygen is within the specified range. Firmly
tighten the inlet air shutter locking nuts when
finished.
Table 3
Combustion Oxygen Levels for a 100%
Firing Rate
Inlet Air
Temp
Oxygen
(+0.2/-1.0)
Carbon
Monoxide
-20°F 6.5 % <150 ppm
0°F 6.3 % <150 ppm
10°F 6.2 % <150 ppm
30°F 5.8 % <150 ppm
50°F 5.4 % <150 ppm
60°F 5.2 % <150 ppm
70°F 5.0 % <150 ppm
80°F 4.8 % <150 ppm
90°F 4.6 % <150 ppm
100°F 4.4 % <150 ppm
REMINDER:
At 30% firing rate, adjust only the differential
pressure regulator. At 100% firing rate, adjust
only the inlet air shutter.
BLOWER
OUTLET
BLOWER
INLET
SCREEN
SHUTTER
SHUTTER
LOCKING NUTS
Figure 4.4
Air Shutter Locking Nut Location