ASSURE GAS PIPING IS LEAK FREE
AND OF PROPER SIZE and type for the
connected load.
SHUT OFF MAIN GAS SUPPLY prior to
installing or servicing boiler gas piping.
1.
Determine the boiler’s maximum gas
demand and minimum gas supply pressure
4.
For materials or conditions other than those
listed above, refer to the National Fuel Gas
Code, NFPA54/ANSI Z223.1, or size the
system using standard engineering methods
acceptable to authority having jurisdiction.
USE PROPER THREAD COMPONENTS
on all gas connectors.
USE THREAD (JOINT) COMPOUNDS
(pipe dope) rated for liquefied petroleum
gas.
5.
Bond all above-ground gas piping to a
grounding electrode and ensure the piping is
electrically continuous.
DO NOT USE GAS PIPING AS A
GROUNDING ELECTRODE. Refer to
National Electrical Code, NFPA 70.
6.
Install sediment trap, ground-joint union and
manual shut-off valve upstream of boiler gas
control valve and outside jacket.
7.
When the piping is completed, test it for
leaks.
(1)
When testing over ½ psig, disconnect
the boiler and its individual shut-off valve
from the gas supply piping.
(2)
When testing at ½ psig or less, isolate
boiler from gas supply piping by closing
boiler’s individual manual shut-off valve.
(3)
Locate leaks using approved
combustible gas detector or
nonflammable, non-corrosive leak
detection solution.
DO NOT CHECK FOR LEAKS USING
OPEN FLAMES such as matches or
candles or devices that spark.
8.
Repair any detected leaks.
APPENDIX C – Gas Piping (continued)
Table C-3: Specific Gravity Correction Factors For
Natural Gas
Specific
Gravity
Correction
Factor
Specific
Gravity
Correction
Factor
0.50
1.10
0.85
0.81
0.55
1.04
0.90
0.82
0.60
1.00
1.00
0.78
0.65
0.96
1.10
0.74
0.70
0.93
1.20
0.71
0.75
0.90
1.30
0.68
0.80
0.87
1.40
0.66
(printed on the boiler’s rating label) and the
demand of other gas appliances served by
the same gas meter.
2.
Ensure that gas piping, fittings, and gas
meter capacities can supply the maximum
gas demand of all appliances at pressures
above their minimum allowable gas
pressure. The following tables provide
typical capacities of gas pipes and fittings.
3.
Derate the gas flow through pipes by
multiplying by a correction factor in Table
C-3 based on the specific gravity of the gas.
Содержание ESC
Страница 6: ... Figure S 1 Minimum Clearances to Combustibles SPECIFICATIONS continued ...
Страница 30: ...30 Internal Wiring Figure IW 1 Wiring Diagram ...
Страница 31: ...31 Internal Wiring continued Figure IW 2 Wiring Diagram ...
Страница 37: ...37 APPENDIX B1 INTENTIONALLY OMITTED ...
Страница 50: ...50 Figure D 0 Piping Schematic Symbols APPENDIX D System Piping continued ...
Страница 62: ...62 SERVICE RECORD DATE SERVICE PERFORMED ...
Страница 63: ...63 SERVICE RECORD DATE SERVICE PERFORMED ...
Страница 64: ...64 U S Boiler Company Inc P O Box 3020 Lancaster PA 17604 717 397 4701 www usboiler burnham com ...
