40
Bryan Steam, LLC
www.bryanboilers.com
Phone: 765-473-6651
783 N Chili Ave, Peru, IN 46970 [email protected]
Connect field supplied safety limits or devices using
proper terminals provided in boiler electrical cabinet.
Refer to wiring diagram supplied with boiler for wiring
information.
See Appendix G for sample-wiring diagrams. An as-
built wiring diagram is included with every boiler when
it ships. Contact a Thermal Solutions Representative
or visit the website (
www.thermalsolutions.com
) for
current wiring options.
B.
Gas Supply Requirements
Refer to Table 18 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 Table 32.
NOTICE
The step down regulator shall be installed at least
60 pipe diameters from the boiler gas inlet manual
shutoff valve and vented to atmosphere. Vent
Limiters are NOT acceptable. This will ensure proper
gas regulation for establishing main flame reliably.
Table 18: Gas Supply Requirements
Free Flex
Model
Capacity
Inlet
(
npt
)
Min.
(
iwc
)
Max.
(
iwc
)
1000
1000
1
4
14
1500
1500
2
4
14
2000
2000
2
4
14
2500
2500
2
4
14
3000
3000
2
4
14
3500
3500
2
7
14
4000
4000
2
7
14
4500
4500
2
7
14
5000
5000
2
7
14
5500
5500
2
7
14
6000
6000
2
7
14
C. 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 19 for decibel readings.
Table 19: Sound Pressure Levels
Free Flex
Model
Decibel Levels
Front
Rear
Tube Side Right Side
1000
68
61
63
64
1500
67
60
61
63
2000
67
60
61
63
2500
62
62
66
61
3000
62
62
66
61
D.
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.
It is recommended that a water meter be installed
in the make-up water system to the boiler system.
Scheduled recording of the water meter register
will show an indication of a potential slow system
leak in addition to providing insight into any system
problems. Also, make-up water as well as water for
the initial system fill should be provided through a
water softener. Additionally, chemical treatment of
the system water is advisable. Contact a qualified
boiler water chemical treatment company for their
recommendations. See Section VI, Step ""E. Boiler
Water Treatment" for more information.