AERCO KC Series Equipped with C-More version 3.04 - Manual (Page 35)

INITIAL START-UP
4-5
15. Replace the regulator cap and cap gasket and wait for the analyzer reading to settle.
16. When the analyzer reading settles, compare the new oxygen reading to Table 1.
17. If necessary, repeat the adjustment until the oxygen level is within the range specified in Table 1.
18. Replace the regulator cap and cap gasket.
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 valve position to 13%.
20. Oxygen levels at the 13% valve position 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 13% (Natural Gas) and a 16% (Propane) Valve Position
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 valve position to 100%. After the combustion analyzer has settled, compare the measured
oxygen level with the levels in Table 3.
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 and 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. Close the air shutter 1/4” to 1/2” to decrease the oxygen level and
tighten the two nuts.
Table 3
Combustion Oxygen Levels for a 100% Valve Position
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