Fuel Gas Supply Connection; Installing Gas Feed - Buderus Logano G234X 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 only be carried out 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 gas shut-off valve must be installed outside the
boiler casing if required by the local code. We
recommend installing a gas shut-off 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.
▶ Make sure that a sediment trap is fitted at the inlet for the gas supply
pipe to the boiler.
The gas feed pipe is designed for a gas connection on the
right side.
For the conversion to left-side gas connection, see
section 5.1.
To prevent strain on the gas valves, extensions of the gas
supply line must be supported.
Gas pipe delivery rate in cubic feet of gas per hour
Length of the pipe in feet
(1 foot = 0.3 m) 1"
10 520
20 350
30 285
40 245
50 215
75 175
100 160
150 120
Table 7 Gas pipe delivery rate
1) Maximum gas pipe delivery rate in cu ft/hr (1 ft
equivalent to a water column of 0.3 inches (7.6 mm).
Iron pipe nominal diameter (in
inches)
1
1¼
1½
2
2½
Table 8 Equivalent lengths for pipe fittings
12
1¼ "
1060
730
590
500
440
360
305
250
3
/h = 28.3 l/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 lengths for pipe fittings in feet (1 foot = 0.3 m)
Type of pipe fitting
90° elbow T-piece
3 5
4 6
5 7
7 10
8 12
Fig. 11 Gas valve pipe connection
[1] Gas supply
[2] Shut-off
[3] Sediment trap
[4] Retaining screws at the gas feed line (on site)
1) 3
(1 ft /h = 28.3 l/h)
1½ " 2"
1600 3050
1100 2100
890 1650
760 1450
670 1270
545 1020
480 870
380 710
Shut-off valve
0.6
0.8
1.0
1.3
1.6
Logano G234X – 6 720 804 886 (2012/08)
2½ "
4800
3300
2700
2300
2000
1650
1400
1130
Gas shut-off valve
1.60
2.15
2.50
3.00
3.50