50
Bryan Steam, LLC
www.bryanboilers.com
Phone: 765-473-6651
783 N Chili Ave, Peru, IN 46970 [email protected]
WARNING
To
PREVENT Burner Flashback
If O
2
level starts dropping and quickly goes
below 4.7%, either adjust the SKP25 regulator
counter-clockwise, a quarter turn at a time, to
increase the
O
2
or shut the boiler off to adjust.
(
The SKP25 looks similar to the SKP55 in Figure
14
)
If the O
2
drops below 4.0% immediately
shut the boiler off, adjust the SKP25 a half turn
counter-clockwise and restart the boiler (
boiler
still might need more adjustment
).
18. Once main flame is established, leave boiler at
low fire and observe that O
2
levels are within a
safe operating range. (
5.0% to 7.0%
).
19. Once safe O
2
levels are established step the
boiler from 20% to 100% monitoring the O
2
.
20. Once boiler has reached high fire rate, check
that O
2
levels are within a safe operating range.
(
5.0% to 7.0%
)
NOTICE
If low fire and/or high fire rates cannot be
established or air switch issues, see Appendix B.
21. The O
2
can be shifted for the whole curve by
increasing or decreasing the gas pressure with
the boiler's SKP25 pressure regulator with all
jacket panels installed and front cabinet door
closed.
a. For best efficiency, standard O
2
should be set
to 5.0% to 5.5%.
b. For boilers specified to be less than 20 ppm
NOx adjust the O
2
level within 6.5% to 7.0%.
c. For boilers specified to be less than 9 ppm
NOx adjust the O
2
level within 7.0% to 9.0%.
22. Verify O
2
repeatability by commanding the
boiler from 20% to 100% and the intermediate
points in between as many times as required,
repeating Step 21 as necessary.
23. Once the boiler is operating within the specified
high and low fire ranges, record emissions,
flue draft, and other important data on the
installation and startup report, see Appendix I.
NOTICE
NOTICE
Advanced
O
2
Adjustment - refer to the Siemens
Manual, February 19, 2019 or later. (
See Siemens
Website for manual. https://scccombustion.com/
products/lmv3-linkageless-burner-management-
system/
)
24. Perform tests on each of the components
listed in Table 29.
J. Finish Commissioning the Free Flex 1000 - Free
Flex 6000
Reconnect any wires from the external control system,
if applicable.
1. Perform an operation test of the external
control system.
2. Place system control back in normal operation,
if necessary.
3. Place the boiler into automatic mode. Menu
> Operation > Auto / Manual Rate Control >
Automatic (
76 password required
)
K.
Re-Starting After Prolonged Shutdown
Use the following recommendations prior to re-
starting the heating system after prolonged shutdown.
1. Perform Pre-Start-Up Inspection by checking all
gas, water, air intake and venting connections
to ensure proper, leak-free connections and
that the water and gas lines has been cleaned
completely.
2. Ensure that combustion air piping, vent piping,
and terminations are free of obstructions.
3. Inspect the boiler for damage and loose wire
connections.
4. Remove all flammable material present in the
vicinity of the boiler.