AERCO KC1000 Heater Mar 2011 - Manual (Page 35)

INITIAL START-UP
4-7
14. Use a flat-tip screwdriver to adjust the
differential pressure regulator. Turn the
screwdriver:
•
counterclockwise to increase the
oxygen level
• clockwise to decrease the oxygen level
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 4.
17. If necessary, repeat the adjustment until the
oxygen level is within the range specified in
Table 4.
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. Once the oxygen level is within the specified
range at 30%, change the valve position to
16%.
20. Oxygen levels at the 16% valve position
should be as shown in Table 5. Also,
ensure that the CO and NOx readings do
not exceed the values shown. No
adjustment should be necessary. Contact
AERCO if the oxygen, CO or NOx levels are
not within the specified ranges.
Table 5
Combustion Oxygen Levels for a 16%
Valve Position
Inlet Air
Temp
Oxygen
(±0.2%)
Carbon
Monoxide *NOx
-25°F <10% <100 ppm <30 ppm
-10°F <10% <100 ppm <30 ppm
0°F <10% <100 ppm <30 ppm
10°F <10% <100 ppm <30 ppm
25°F <10% <100 ppm <30 ppm
40°F <10% <100 ppm <30 ppm
55°F <10% <100 ppm <30 ppm
70°F <10% <100 ppm <30 ppm
85°F <10% <100 ppm <30 ppm
100°F <10% <100 ppm N/A
* NOx readings corrected to 3% oxygen.
NOTE:
At a 100% valve position, 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 2.8.2 and 2.8.3.
21. Change the valve position 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 6. If the Cold
Air Damper is not installed, compare the
oxygen levels with the readings in Table 6A.
Table 6
Combustion Oxygen Levels for a 100%
Valve Position With Cold Air Damper
Inlet Air
Temp
Oxygen
(±0.2%)
Carbon
Monoxide *NOx
-25°F 5.9 <100 ppm <30 ppm
-10°F 5.7 <100 ppm <30 ppm
0°F 5.6 <100 ppm <30 ppm
10°F 5.5 <100 ppm <30 ppm
25°F 5.4 <100 ppm <30 ppm
40°F 5.3 <100 ppm <30 ppm
55°F 5.1 <100 ppm <30 ppm
70°F 5.0 <100 ppm <30 ppm
85°F 4.8 <100 ppm <30 ppm
100°F 4.1 <100 ppm N/A
* NOx readings corrected to 3% oxygen.
Table 6A
Combustion Oxygen Levels for a 100%
Valve Position Without Cold Air Damper
Inlet Air
Temp
Oxygen
(±0.2%)
Carbon
Monoxide *NOx
55°F 6.7% <100 ppm <30 ppm
70°F 5.7% <100 ppm <30 ppm
85°F 4.7% <100 ppm <30 ppm
100°F 3.9% <100 ppm N/A
* NOx readings corrected to 3% oxygen.
21. If the measured oxygen reading is below the
oxygen range in Table 6 (or 6A), 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.