5
Boiler installation
Logano G234X – 6 720 804 886 (2012/08)12
5.4 Fuel gas supply connection
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.
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)
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.
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.
Length of the pipe in feet
(1 foot = 0.3 m)
Gas pipe delivery rate in cubic feet of gas per hour
1)
(1 ft
3
/h = 28.3 l/h)
1) Maximum gas pipe delivery rate in cu ft/hr (1 ft
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 to a water column of 0.3 inches (7.6 mm).
1" 1¼ " 1½ " 2" 2½ "
10 520 1060 1600 3050 4800
20 350 730 1100 2100 3300
30 285 590 890 1650 2700
40 245 500 760 1450 2300
50 215 440 670 1270 2000
75 175 360 545 1020 1650
100 160 305 480 870 1400
150 120 250 380 710 1130
Table 7 Gas pipe delivery rate
Iron pipe nominal diameter (in
inches)
Equivalent lengths for pipe fittings in feet (1 foot = 0.3 m)
Type of pipe fitting
90° elbow T-piece Shut-off valve Gas shut-off valve
1 3 5 0.6 1.60
1¼ 4 6 0.8 2.15
1½ 5 7 1.0 2.50
2 7 10 1.3 3.00
2½ 8 12 1.6 3.50
Table 8 Equivalent lengths for pipe fittings
To Next Page
Loading...
Need help?
General