Fuel Supply Connection - Buderus Logano GA124 Installation And Maintenance Instructions Manual

7 Boiler installation
7.5

Fuel supply connection

7.5.1 Gas connections
For the gas pipe diameter required for the installation
please see Tab. 4 and Tab. 5. Make sure that the pipe
fitting has the correct thread size.
Make sure that a sediment trap is installed at the inlet for
the gas supply pipe to the boiler. A gas shut-off must be
installed outside the boiler jacket if required by the local
code. We recommend installing a gas shut-off in the
main gas pipe to the boiler. The gas pipes must be
fastened outside the boiler.
The local codes must be observed during installation of
the gas connection, otherwise the regulations of the
National Fuel Gas Code, ANSI Z 223.1.
DANGER OF EXPLOSION
Leakage from the gas pipes and gas
connections may cause an explosion.
WARNING!
Use soap solution to find leaks.
Length Gas pipe supply volume in cubic feet of gas
of pipe
in feet 1/2 3/4
10 132 278
20 92 190
30 73 152
40 63 130
50 56 115
75 45 93
100 38 79
150 31 64
Tab. 4 Gas pipe supply volume
1 Maximum gas supply volume in cubic feet per hour, based on a
specific gas weight of 0.60 and a gas pressure of 0.5 psi or less
and a pressure gradient corresponding to a water column of
0.3 inches.
Equivalent lengths for pipe fittings in
Nominal
diameter of
iron pipe
90° angle T-piece Stop valve
(inches)
Equivalent lengths in feet
1/2 1.4
3/4 2.1
1 2.6
1 1/4 3.5
1 1/2 4.0
Tab. 5 Equivalent lengths for pipe fittings
Disconnect the boiler with the gas shut-off from the gas
supply pipe system the system is pressure tested with a
test pressure greater than 1/2 psi.
22 Installation and maintenance instructions Logano GA124 special gas-fired boiler • Issue 04/2005
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per hour
1 1 1/4 1 1/2
520 1060 1600
350 730 1100
285 590 890
245 500 760
215 440 670
175 360 545
160 305 480
120 250 380
feet
Pipe fitting type
Gas
valve
2.7 0.3 0.80
4.1 0.5 1.25
5.2 0.6 1.6
6.9 0.8 2.15
8.0 0.9 2.50
Fig. 20 Pipe connection to gas fittings – back view
1 Gas feed
2 Hand stop valve
3 Sediment trap
We reserve the right to make any changes due to technical modifications.
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