Watts AERCO Benchmark 2.0, Руководство пользователя

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INITIAL START-UP
4-4
NOTE:
Adjust only the differential regulator at 40%
control signal. Do not adjust the iris air
damper.
Table 1
Combustion Oxygen Levels for a 40%
Firing Rate
Inlet Air
Temp
Oxygen
(±0.2)
Carbon
Monoxide
100°F 5.9% <50 ppm
80 ° F
6.3% <50 ppm
70 ° F
6.5% <50 ppm
60
o
F 6.7% <50 ppm
50
o
F 6.9% <50 ppm
40
o
F 7.1% <50 ppm
20
o
F 7.5% <50 ppm
0
o
F 7.9% <50 ppm
-20
o
F 8.3% <50 ppm
11. Once the oxygen level is within the specified
range at 40%, lower the firing rate to 16%.
12. 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
Carbon
Monoxide
100°F 12% or less <100 ppm
80 ° F
12% or less <100 ppm
70 ° F
12% or less <100 ppm
60
o
F 12% or less <100 ppm
50
o
F 12% or less <100 ppm
40
o
F 12% or less <100 ppm
20
o
F 12% or less <100 ppm
0
o
F 12% or less <100 ppm
-20
o
F 12% or less <100 ppm
13. Raise the firing rate to 100%. Gas pressure
should still be 7.0” for FM gas trains and 7.4”
W.C. for IRI gas trains. If it is not, readjust
as necessary.
14. Allow the combustion analyzer to settle.
Compare the measured oxygen level with
the levels in Table 3.
15. If the measured oxygen reading is within the
specified range shown in Table 3, no further
adjustment is necessary.
16. If the measured oxygen level is not within
specified range in Table 3, adjust the iris
damper as necessary until the measured
oxygen reading is within specification. (See
Figure 4.5).
Table 3
Combustion Oxygen Levels for 100% Firing
Rate
Inlet Air
Temp
Oxygen
(±0.2)
Carbon
Monoxide
100°F 4.8% <100 ppm
80 ° F
5.2% <100 ppm
70 ° F
5.4% <100 ppm
60
o
F 5.6% <100 ppm
50
o
F 5.8% <100 ppm
40
o
F 6.0% <100 ppm
20
o
F 6.4% <100 ppm
0
o
F 6.8% <100 ppm
-20
o
F 7.2% <100 ppm
OPEN
BLOWER AIR
DUCT TO AIR
/FUEL VALVE
CLOCKWISE
OUTLET
USE A 1/2" WRENCH TO
INCREASE/DECREASE
AIR INTAKE
Figure 4.5
Iris Air Damper Locatio n
17. Change the firing rate to 40%. Allow time for
the combustion analyzer to settle. Check the
measured oxygen reading to insure that it is
still within the range as per Table 1.
18. Continue this procedure until oxygen levels
at 40%, 16% and 100% firing rates are
within the ranges specified in Tables 1, 2
and 3.