Section 2 — Installation
2-16
Part No. 750-263
4. Gas Piping
CFC units are not standardly equipped with an upstream gas
pressure regulator. Therefore, a regulator must be installed at each
CFC unit. Do not use a common regulator to regulate pressure for a
multiple unit installation. Note: Gas connection is at the rear of the
boiler, left hand side as you face the rear of the boiler.
If local code permits, a flexible connection can be used between the
gas line and gas valve. This will enable the burner door to be opened
without disconnecting the gas line.
The regulator for each boiler must be installed with at least 2 feet of
pipe between the regulator and the boiler gas train connection. The
discharge range of the regulator must be able to maintain gas
pressures as noted in
Table 2-3
.
For buildings or boiler rooms with gas supply pressure exceeding 28"
w.c. a "full lock-up" type regulator is required as well as overpressure
protection (e.g. relief valve).
In addition to the regulator, a plug type or "butterball” type gas
shutoff valve must be installed upstream of the regulator for use as a
service valve. This is also required to provide positive shutoff and
isolate the unit during gas piping tests.
If necessary a strainer should be installed upstream of the regulator
to remove debris from the gas supply.
Drip legs are required on any vertical piping at the gas supply to
each boiler so that any dirt, weld slag, or debris can deposit in the
drip leg rather than into the boiler gas train. The bottom of the drip
leg should removable without disassembling any gas piping. The
connected piping to the boiler should be supported from pipe
supports and not supported by the boiler gas train or the bottom of
the drip leg. Do not pipe across the top of the boiler as the burner
swings up for service and must have proper clearance.
All gas piping and components to the boiler gas train connection
must comply with NFPA 54, local codes, and utility requirements as
a minimum. Only gas approved fittings, valves, or pipe should be
used. Standard industry practice for gas piping is normally Schedule
40 black iron pipe and fittings.
Before starting the unit(s) all piping must be cleaned of all debris to
prevent its entrance into the boiler gas train. Piping should be tested
as noted in NFPA 54 and the boiler must be isolated during any
tests.
After initial startup, the inlet screen to the gas valve should be
checked and cleaned of any debris buildup.
See
Figure 2-23
for a typical piping configuration.
Figure 2-22 Test cocks - gas
valve
Pressure
Test
Leak Test
Leak Test
Содержание CFC-1000
Страница 1: ...Manual Part No 750 263 07 2010 Model CFC ClearFire Condensing Boiler Operation Service and Parts ...
Страница 35: ...Section 2 Installation Part No 750 263 2 21 Figure 2 23 Gas Piping ...
Страница 47: ...Section 2 Installation Part No 750 263 2 33 Figure 2 41 Electrical Connection Diagram ...
Страница 49: ...Section 2 Installation Part No 750 263 2 35 Figure 2 43 CFC Wiring Diagram dual fuel units ...
Страница 50: ...Section 2 Installation 2 36 Part No 750 263 ...
Страница 70: ...Section 3 Stack and Intake Vent Sizing and Installation 3 20 Part No 750 263 ...
Страница 102: ...Section 4 CFC Commissioning 4 32 Part No 750 263 ...
Страница 108: ...Section 5 Service and Maintenance 5 6 Part No 750 263 ...
Страница 110: ...Section 6 Parts 6 2 Part No 750 263 Figure 6 1 Boiler Mechanical Assembly I 26 15 20 20 3 10 11 G H ...
Страница 113: ...Section 6 Parts Part No 750 263 6 5 Figure 6 3 Casing Table 6 5 Casing parts ...
Страница 114: ...Section 6 Parts 6 6 Part No 750 263 Figure 6 4 Gas train single fuel Table 6 6 Gas train single fuel parts BOILER SIZE ...
Страница 117: ...Section 6 Parts Part No 750 263 6 9 Figure 6 7 Electrical assemblies single fuel ...
Страница 123: ...APPENDIX A CB FALCON CONTROLLER ...
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Страница 244: ...CB FALCON 750 265 120 ...
Страница 245: ...APPENDIX B CB FALCON PLUG IN MODULE ...
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Страница 251: ...APPENDIX C GAS VALVE ...
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Страница 269: ...APPENDIX D CB FALCON MODBUS COMMUNICATION ...
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