Buderus G234X/38, Инструкция по установке и обслуживанию

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5
Boiler installation
Logano G234X – 6 720 811 233 (2017/02) 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.
▶ Install a sediment trap at the inlet where the gas supply pipe connects
to the boiler.
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)
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.
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.
1
2
3
4
6 720 806 028-07.1T
Pipe length Flow rate
1)
[ft
3
/h] (1 ft
3
/h = 28.3 l/h)
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).
[foot] (1 foot = 0.3 m) 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 supply volume
Equivalent lengths for pipe fittings [feet] (1 foot = 0.3 m)
Iron pipe nominal diameter Pipe fitting type
[inch] 90 ° elbow T-piece Shutoff valve Gas shutoff
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