Bryant BFIT 1000, Инструкция по установке, эксплуатации и обслуживанию

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53
XII. System Start-up
(continued)
c. For boilers specified to be less than 20 ppm
NOx adjust O
2
level to 6.0 %.
d. If high fire O
2
is too high (CO
2
is too low),
decrease O
2
(increase CO
2
) by turning the
adjustment screw towards the "Plus (+)"
sign in 1/4 turn increments and checking
the O
2
(or CO
2
) after each adjustment. Refer
to Figure 25 for location of throttle screw.
Verify CO air free is less than 200 ppm.
e. Lock boiler in low fire and allow fan
speed and combustion analyzer reading
to stabilize before taking combustion
readings. To lock boiler in low fire, select
High Low >> Low.
f. If low fire O
2
is too low (CO
2
is too high),
increase O
2
(decrease CO
2
) by turning
turn adjustment screw towards "Minus
(-)" sign in less than 1/8 turn increments
and checking the O
2
(or CO
2
) after each
adjustment. Verify CO concentration is less
than 200 ppm.
g. If low fire O
2
is too high (CO
2
is too low),
decrease O
2
(increase CO
2
) by turning the
adjustment screw towards the "Plus (+)"
sign in 1/4 turn increments and check O
2
(or CO
2
) after each adjustment. Verify CO
air free is less than 200 ppm.
h. Verify O
2
repeatability by modulating the
boiler to high and low fire three times.
i. Once the boiler is operating within the
specified high and low fire ranges, record
emissions, flue draft, and other important
data.
j. Compare emission data to the f actory
emissions report is posted on the back of
the front jacket panel
6. Return boiler to Automatic Mode. From
Operation screen, select Automatic / Manual
Firing Rate Control >> Automatic Modulation.
Select HOME to return boiler to Home Screen.
Boiler
Model
CO
2
% O
2
% CO air free
(PPM)
BFIT 1000 8.5-9.0 5.0-6.0
Less than
200 PPM
BFIT 1250 8.5-9.0 5.0-6.0
BFIT 1500 8.0-9.0 5.0-6.0
BFIT 2000 8.5-9.0 5.0-6.0
5. Verify O
2
(or CO
2
) and CO concentration are
within limits specified in Table 24. Note: the
values in Table 24 are for sea level only. For
high altitude installation, above 2000 ft.
consult factory.
a. Lock boiler in high fire and allow fan
speed and combustion analyzer reading
to stabilize before taking combustion
readings. To lock boiler in high fire, select
MAIN MENU >> OPERATION. Select lock
symbol, type password and select ENTER.
From the Operation screen, select Automatic
/ Manual Firing Rate Control >>Manual
Modulation. Go back to Operation screen.
Then select High Low >> High.
b. Once boiler has reached high fire rate,
adjust the O
2
level at high fire with all the
jackets, including the front cabinet door
closed.
Table 24: Combustion O
2
Levels
Figure 25: Air-to-Fuel Adjustment
3. It may take a couple of ignition attempts before
a flame is established. After the first igntion
failure, the boiler goes into a hard lockout and
a manual rest of the Convert Boiler Control
is required to restart the boiler. If ignition is
not achieved in three consecutive attempts ,
contact factory or a qualified heating service
technician.
4. Begin commissioning the boiler. Visually
inspect flame via sight class window. On high
fire the flame should be stable and mostly
blue. Yellow tips should not be present; but,
intermittent flecks of yellow and orange in the
flame are normal.