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INSTALLATION
ƒ For multiple boiler installations it is recommended
that an individual line gas pressure regulator be
used to step-down the gas pressure at each boiler.
Where a single regulator is used for multiple boilers
the regulator must be appropriate for the entire gas
delivery turndown range. This includes all boilers on at
full re to one boiler on at low re (see Figure 12).
Gas Piping Installation
Field gas piping must be installed in accordance with NFPA
54 National Fuel Gas Code, ANSI Z223.1, and any other local
codes which may apply. Adhere to the following for gas
piping installation:
1. See Table 3 for required natural gas pipe size, based on
overall length of pipe from the meter plus equivalent
length of all ttings. Approximate sizing may be based
on 1,020 BTU for 1 cubic foot of natural gas. See Figures
6 and 7 for piping arrangements.
2. Piping must be of the proper size to ensure adequate
gas supply. It is typical for gas delivery piping to be up-
sized one or several diameters larger than boiler gas
inlet size.
2-14
SEE NOTE 2,3
GAS SUPPLY
FIGURE 10 ENDURA SINGLE BOILER GAS SUPPLY PIPING
3. The pipe and the ttings used must be new and free of
4. When making gas-piping joints, use a sealing
5. Install a manual gas shuto valve and union (not
6. Piping must be installed such that no piping stresses
7. All gas piping connections must be pressure-tested and
8. The boiler gas train must be disconnected at the boiler
EDR-PURE-IOM-230608
LINE GAS PRESSURE REGULATOR (SEE NOTE 1)
MANUAL
SHUTOFF VALVE
Notes:
1. Required for installation with greater than
28"W.C. (14"W.C. Canada) inlet pressure, eld
supplied.
NOTES:
2. Required 10 pipe diameters equivalent to the
REQUIRED FOR INSTALLATIONS W
1.
W.C. INLET PRESSURE. FIELD SUP
regulator connection size. This pipe must be
2.
REQUIRED 10 PIPE DIAMETERS E
straight, uninterrupted pipe between regulator
REGULATOR CONNECTION SIZE. T
STRAIGHT UNINTERRUPTED PIPE
outlet and and any ttings, valves, or elbows.
OUTLET AND ANY FITTINGS, VALV
3.
THE LINE REGULATOR SHOULD B
MINIMUM OF 10 LINEAR FEET OF
REGULATOR OUTLET AND BOILER
3. The line regulator should be installed with a
4.
THIS DRAWING IS NOT FOR CON
minimum of 10 linear feet of pipe between the
5.
REFER TO THE INSTALLATION AN
regulator outlet and boiler fuel train inlet.
INFORMATION REGARDING GAS H
AND OTHER INSTALLATION REQU
dirt or other deposits.
compound resistant to the fuel gas serving the boiler.
supplied) prior to the boiler.
are transmitted to the boiler. The boiler cannot be used
as a pipe anchor.
checked for leaks before being placed into service. Test
with compressed air or inert gas if possible.
manual shuto valve from the gas supply piping system
during any pressure testing of the system at pressures
in excess of 1.0 psig (28 inch W.C.).
SECTION 2
© Fulton Group N.A., Inc. 2023
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