Fuel Gas Supply Connection - Buderus Logano GC124 II/SP Installation And Service Instructions Manual

7 Boiler installation
7.4

Fuel gas supply connection

7.4.1 Gas connections
For the gas pipe diameter required for the installation
please see Tab. 4 and
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 manual stop valve
must be installed outside the boiler jacket if required by
the local code. We recommend installing a manual
shut-off valve in the main gas pipe to the boiler. The gas
pipe must be fastened outside the boiler.
The local codes must be observed during installation of
the gas piping connections, otherwise the regulations of
the National Fuel Gas Code, ANSI Z 223.1 must be fol-
lowed.
Install gas piping without any undue stress on the
piping.
The Commonwealth of Massachusettes prohibits the
use of copper tubing for the gas line.
DANGER OF EXPLOSION
Leakage from the gas pipes and gas
connections may cause an explosion.
WARNING!
Use soap solution to find leaks.
Gas carrying capacity (refer to technical manual
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. 5 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.
18
Tab. 5. Make sure that the
1
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
Installation and maintenance instructions Gas Boiler Logano GC124 II/SP • Issue 07/2006
1
2
3
Fig. 13 Gas piping connection to gas valve – right or left side
1 Gas feed
2 Manual shut-off valve
3 Sediment trap
Chapter 18, page 79)
Equivalent lengths for pipe fittings in
Nominal
diameter of
iron pipe 90°-
(inches) angle
1/2 1.4
3/4 2.1
1 2.6
1 1/4 3.5
1 1/2 4.0
Tab. 4 Equivalent lengths for pipe fittings
We reserve the right to make any changes due to technical modifications.
feet
Pipe fitting type
Shut-off
T-piece
valve
Equivalent lengths in feet
2.7 0.3
4.1 0.5
5.2 0.6
6.9 0.8
8.0 0.9
Gas
shut-off
0.80
1.25
1.6
2.15
2.50