Gas Supply; Gas Connections - Buderus Logano GA224 Installation, Operation And Maintenance Manual

Gas Supply

8 Gas Supply
8.1

Gas Connections

Determine proper size gas pipe for the installation using
Table 3 and Table 4. Do not forget the pipe fitting losses
and observe proper size of the fittings.
A sediment trap must be installed at the inlet of the gas
supply piping to the boiler. When local codes require, a
manual shut-off valve must be installed outside the
boiler jacket. It is recommended that a manual shut-off
valve be installed on the main gas piping to the boiler.
The gas piping must be supported external to the boiler.
When installing the gas supply connection, it must
comply with local regulations or, if such regulations do
not exist, with the National Fuel Gas Code, ANSI Z
223.1. In Canada, the gas supply connection must
comply with local regulations or, if such regulations do
not exist, with CSA/CGA-B149 Installation Guidelines.
EXPLOSION DANGER !
The possibility for explosions exists due to
leaks in gas piping and connections.
DANGER!
z All gas connections must be tested for
leaks with a soap and water solution.
Length Gas Volume Capacity
of
pipe
1/2" 3/4"
(Feet)
10 132 278
20 92 190
30 73 152
40 63 130
50 56 115
75 45 93
100 38 79
150 31 64
Table 3 Gas Pipe Capacity for different pipe sizes
1 Maximum pipe capacity in ft³/hr, based on a specific gravity of .60
and a gas supply pressure of .5 psi or less and a pressure drop of
.3 inches W.C.
We reserve the right to make any changes due to technical modifications!
Installation, Operation and Maintenance Manual Sealed Combustion Gas Boiler Logano GA244 • Issue 02/2004
1
(ft3 / hr)
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
1
2
3
Fig. 7 Gas supply piping: rear view
Item. 1: Gas supply piping
Item. 2: Manual shut off valve
Item. 3: Sediment trap
Buderus Heiztechnik GmbH • http://www.heiztechnik.buderus.de
8
13