AERCO KC1000 Boiler equipped with C-More 2002 - Manual (Page 50)

INITIAL START-UP
4-4
NOTE:
Adjust only the differential regulator at 30%
control signal; do not adjust the air shutter.
19. When the oxygen level is within the specified
range at 30%, change the firing rate to 13%.
20. The oxygen levels at the 13% 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 Both a
13% (Natural Gas) and 16% (Propane)
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
21. Change the firing rate to 100%. After the
combustion analyzer has settled, compare
the measured oxygen level with the levels in
Table 3.
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
22. 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.
23. 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.
24. 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.
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
25. Close the air shutter 1/4” to 1/2” to decrease
the oxygen level and tighten the two nuts.
26. Allow the analyzer to settle then compare the
new oxygen reading to Table 3.
27. Repeat the adjustment until the oxygen is
within the specified range. Firmly tighten the
inlet air shutter locking nuts when finished.