Gas Supply
8
13
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
Buderus Heiztechnik GmbH • http://www.heiztechnik.buderus.de
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.
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.
Fig. 7
Gas supply piping: rear view
Item. 1:
Gas supply piping
Item. 2:
Manual shut off valve
Item. 3:
Sediment trap
1
2
3
DANGER!
EXPLOSION DANGER !
The possibility for explosions exists due to
leaks in gas piping and connections.
z
All gas connections must be tested for
leaks with a soap and water solution.
Length
of
pipe
(
Feet)
Gas Volume Capacity
(ft3 / hr)
1
1/2“
3/4“
1“
1 1/4“
1 1/2“
10
132
278
520
1060
1600
20
92
190
350
730
1100
30
73
152
285
590
890
40
63
130
245
500
760
50
56
115
215
440
670
75
45
93
175
360
545
100
38
79
160
305
480
150
31
64
120
250
380
