Harsco Industrial P-K THERMIFIC N700, Инструкция по установке и эксплуатации

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P-K THERMIFIC
®
Gas-Fired Boiler
28
The boiler and all gas piping connections must be pressurized and checked for leaks before being
placed into service. Pressurize with compressed air or inert gas if possible.
The boiler must be disconnected at the boiler manual shut-off valve (located at the end of the supplied
gas train) from the gas supply piping system during any pressure testing of the system at pressures in
excess of 1/2 psig (14” W.C.). Excessive pressure could cause component damage.
Some leak test solutions, including soap and water, may cause corrosion. These solutions should be
rinsed-off with water after testing.
3.6.2 Gas Bleeds and Vents
The vent line connection on the main gas pressure regulator
must be piped to outdoor air by the installer in accordance
with the National Fuel Gas Code NFPA54/ANSI Z223.1,
latest edition.
NOTICE! The installer must provide a drip leg, as
shown, in all vent/bleed lines. All vent lines should be
pitched up at all times to prevent building a trap into the vent
line.
“Vent limiters” are NOT to be installed on the primary gas
regulator on this boiler.
The pilot regulator is equipped with a vent limiting device
and does not require external venting!
If a N.O. vent valve is provided, it must be vented independently.
On units supplied with diaphragm gas valves, the bleed vents have been factory-piped to terminate at the
burner, as required by ANSI Z21.13. This feature provides combustion of any gas which leaks past a
ruptured diaphragm during operation. When installing per ASME CSD-1, disconnect factory piped bleed
vents and vent the diaphragm gas valves to outdoor air (field piping.)
All vent/bleed line must be piped by the installer in accordance with the
National Fuel Gas Code NFPA 54/ANSI Z223.1, latest edition, which states:
“In the case of vents leading outdoors, means shall be employed to prevent water from entering this
piping and also to prevent blockage of vents by insects and foreign matter.”
The National Fuel Gas Code Handbook goes on to say that “Insects, insect nests, ice, or freezing rain
can block outdoor vents....”
Vent to
Outside
Drip
Leg
Gas Pressure
Regulator
Vent to
Outside
Drip
Leg
Gas Pressure
Regulator