Form: 2435
Revision: 9
Free Flex Installation and Operation Manual
Date: 9-1-2017
Bryan Steam LLC, 783 N Chili Ave, Peru IN 46970
Web:
www.
bryanboilers
.com
Phone:
765-473-6651
Fax:
765-473-3074
Email:
sales@bryansteam.com
24
3.5.2
Gas Supply Requirements
Refer to Table 6 for minimum and maximum
gas supply pressure. When the gas supply
pressure exceeds the maximum, an additional
field supplied step down regulator will be
required to reduce the supply pressure. For
proper gas supply sizing refer to Appendix A.
NOTICE
The step down regulator shall be installed
at least 60 pipe diameters from the boiler
gas inlet manual shutoff valve. This will
ensure proper gas regulation for
establishing main flame reliably.
Model Capacity
(SCFH)
Inlet
(nps)
Min.
(iwc)
Max.
(iwc)
FF1000
1000
1
4
14
FF1500
1500
2
4
14
FF2000
2000
2
4
14
FF2500
2500
2
4
14
FF3000
3000
2
4
14
Table 6: Gas Supply Requirements
3.5.3
Sound Pressure Levels
Sound pressure levels were measured at 4-
1/2’ above the floor and 3’ from the boiler at
the front, rear and two sides. See Table 7 for
decibel readings.
Table 7 Sound Pressure Levels
Decibel Levels
Model
Front Rear
Tube
Side
Right
Side
FF1000
FF1500
67
60
61
63
Table 7 Sound Pressure Levels
Decibel Levels
Model
Front Rear
Tube
Side
Right
Side
FF2000
67
60
61
63
FF2500
62
62
66
61
FF3000
62
62
66
61
3.5.4
Pump and Piping Requirements
Pump piping and system piping must meet
the requirements of local codes and
jurisdictions. Good engineering practices
should be followed and considered for each
piping system used.
It is advised that the circulating pump for
each boiler be installed as close to the boiler
as possible in the line to the return connection
such that system water is pumped towards the
boiler.
Installing circulating pumps so that the water
is pumped away from the boiler is rarely
recommended.
Means to eliminate air from the boiler/piping
systems is a must. It is advised that an air
separator be installed as close as practical to
each boiler in the outlet pipe. Further, an air
vent should be installed at all high points
throughout the piping system.