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:
14
Figure 5: FF1500 - 3000 Condensate Drain
Trap
1.
1” npt outlet connection
2.
Trap vent connection (tubing not shown
for clarity)
3.
2” threaded cleanout
4.
Float ball
3.2.7
Gas Supply Connection
The installation must conform completely to
the requirements of the authority having
jurisdiction, or in the absence of such,
requirements shall conform in the U.S. to the
current National Fuel Gas Code, ANSI
Z223.1-1984, or in Canada to the current
Natural gas and propane installation code
(CAN/CSA B149.1-05), and applicable
regional regulations for the class; which
should be followed carefully in all cases.
Authorities having jurisdiction should be
consulted before installations are made. Refer
to paragraph 3.5.2 for gas supply
requirements.
3.2.7.1
Drip Leg
A drip leg, or sediment trap, is supplied with
the gas train. The gas line must be connected
to a supply main at least as large as the gas
train connection at the boiler. This
connection should be made with a union so
that the boiler gas train components and
burner may be easily removed for service.
3.2.7.2
Gas Piping Leak Test
After completion of the gas-piping hookup,
the installation must be checked for leaks.
Leaks shall be checked using a soap and water
solution. All joints up to the main motorized
gas valve shall be checked. A pressure gauge
shall be installed down stream of the main
motorized gas valve and up stream of the
manual gas shutoff valve in the closed
position to ensure the main motorized valves
are not leaking by. During commissioning,
the remainder of the gas train joints down
stream of the main motorized gas valve shall
be tested for leaks.
3.2.7.3
Venting of Gas Train Components
The MBC (gas valve) has an internal, factory
installed vent limiter re ANSI Z21.18/ CSA
6.3. Venting required unless otherwise
accepted by the authority having jurisdiction.
The high and low gas pressure switches
incorporate a vent limiter as per UL 353 and
limits the escape of gas less than 1.0 CFH of
natural gas at 7 PSI if internal switch
diaphragm ruptures.
3.3
Combustion Air Supply System
For proper combustion it is necessary to
provide the boiler room with appropriate
openings for fresh air supply. Temporary air
intakes such as windows and doors should be
avoided since they may be closed. In addition
to air needed for combustion, sufficient air
must be supplied for ventilation as well as
other air consuming equipment that may be
present in the boiler room. Often when
personnel are working in the boiler room,
combustion air openings are closed due to the
temperature of the outside air. THIS MUST
BE AVOIDED AT ALL COSTS! Provisions
should be made to heat the outside
combustion air, if necessary, for personnel
comfort.
