Fuel Gas Supply Connection; Installing Gas Feed - Buderus Logano G234X-64 Installation And Service Instructions Manual

5
Boiler installation
5.4

Fuel gas supply connection

Heed the following points for connecting the fuel supply:
▶ Work on gas components may be carried out only by
qualified and authorized personnel.
▶ Observe the local regulations or else the requirements
the National Fuel Gas Code, ANSI Z 223.1 when
connecting the gas supply. In Canada, the
requirements of CAN/CSA-B.149.1 and 2, Installation
Guidelines, must be observed.
▶ A manual shutoff valve must be installed outside the
boiler casing if required by the local code. We
recommend installing a manual shutoff valve in the
main gas pipe to the boiler.
▶ The gas pipes must be fastened outside the boiler.
5.4.1

Installing gas feed

For details of the required gas pipe diameter, refer to Tab. 7 and Tab. 8
on page 12. Make absolutely sure that the pipe fittings have the correct
thread size.
▶ Install a sediment trap at the inlet where the gas supply pipe connects
to the boiler.
The gas supply pipe is designed for a gas connection on
the right side. For conversion to a left-side gas
connection, see Section 5.1.
To prevent strain on the gas valves, extensions of the gas
supply line must be supported.
Pipe length
[foot] (1 foot = 0.3 m)
10
20
30
40
50
75
100
150
Table 7 Gas pipe supply volume
1) Maximum flow rate in cu ft/hr [ft3/h] based on a gas specific gravity of 0.60 and a gas pressure of 0.5 psi (34.5 mbar) or less and a pressure drop equivalent to a water column
of 0.3 inches (7.6 mm).
Iron pipe nominal diameter
[inch]
1
1¼
1½
2
2½
Table 8 Equivalent lengths for pipe fittings
12
Flow rate
1" 1¼ "
520 1060
350 730
285 590
245 500
215 440
175 360
160 305
120 250
Equivalent lengths for pipe fittings [feet] (1 foot = 0.3 m)
90 ° elbow
3
4
5
7
8
Fig. 11 Gas valve pipe connection
[1] Gas supply
[2] Manual shutoff valve
[3] Sediment trap
[4] Unions on the gas supply line (on site)
1) 3 3
[ft /h] (1 ft /h = 28.3 l/h)
1½ "
1600
1100
890
760
670
545
480
380
Pipe fitting type
T-piece Shutoff valve
5
6
7
10
12
Logano G234X – 6 720 811 233 (2017/02)
1
2
3
4
6 720 806 028-07.1T
2" 2½ "
3050 4800
2100 3300
1650 2700
1450 2300
1270 2000
1020 1650
870 1400
710 1130
Gas shutoff
0.6 1.60
0.8 2.15
1.0 2.50
1.3 3.00
1.6 3.50