Buderus Logano plus GB312 Applications Manual page 28

  _
Fit and seal the gas isolating valve supplied
to the boiler's gas connection.
1
2
3
Fig. 20 Gas valve pipe connection
1 Gas supply
2 Manual shut-off valve (supplied)
3 Sediment trap
4 Gas connection with isolating valve
4
7 747 010 720-22.1RS
Gas pipe delivery rate in cubic feet of
Length
gas per hour
of pipe
in feet 1" 1¼"
10 520 1060
20 350 730
30 285 590
40 245 500
50 215 440
75 175 360
100 160 305
150 120 250
Tab. 14 Gas pipe delivery rate
1) Maximum gas pipe delivery rate in cu ft/hr based on a gas spe-
cific gravity of 0.60 and a gas pressure of 0.5 psi or less and a
pressure drop equivalent to a water column of 0.3 inches.
Iron pipe Equivalent lengths for pipe fittings
nominal
diameter (in
inches)
90°
elbow
Equivalent lengths in feet
1 3
1¼ 4
1½ 5
2 7
2½ 8
Tab. 15 Equivalent lengths for pipe fittings
GB312 Applications Manual
1)
1½" 2" 2½"
1600 3050 4800
1100 2100 3300
890 1650 2700
760 1450 2300
670 1270 2000
545 1020 1650
480 870 1400
380 710 1130
in feet
Pipe fitting type
T-piece Shutoff Gas
valve cock
5 0.6 1.60
6 0.8 2.15
7 1.0 2.50
10 1.3 3.00
12 1.6 3.50