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Installation and maintenance instructions Logano G334 X gas-fired boiler • Issue 09/2005
We reserve the right to make any changes due to technical modifications.
Boiler installation7
7.7 Gas supply connection
7.7.1 Installing gas feed
For the gas pipe diameter required for the installation
please see
Tab. 4 and Tab. 5. Make sure that the pipe
fitting has the correct thread size.
Make sure that a sediment trap is installed at the inlet for
the gas supply pipe to the boiler. A hand stop valve must
be installed outside the boiler jacket if required by the
local code. We recommend installing a hand stop valve
in the main gas pipe to the boiler. The gas pipes must be
fastened outside the boiler.
The local codes must be observed during installation of
the gas connection, otherwise the regulations of the
National Fuel Gas Code, ANSI Z 223.1.
Tab. 4 Gas pipe supply volume
1 Maximum gas supply volume in cubic feet per hour, based on a
specific gas weight of 0.60 and a gas pressure of 0.5 psi or less
and a pressure gradient corresponding to a water column of
0.3
inches.
Fig. 18 Pipe connection to gas valves – back view
1 Gas feed
2 Main gas shut-off valve
3 Sediment trap
4 Retaining screws at the gas supply line
1
3
4
2
4
USER NOTE
The gas supply pipe is designed for a gas
connection on the right side.
z If the gas feed is from the left, the gas
connection pipe must be completely
unscrewed, turned 180° and installed
again.
z Check the connection for leaks.
z Please support extenion gas piping to
relieve stress on gas train.
WARNING!
DANGER OF EXPLOSION
Leakage from the gas pipes and gas
connections may cause an explosion.
z Use soap solution to find leaks.
CAUTION!
SYSTEM DAMAGE
due to short-circuit.
z Cover the hazardous locations before
checking for leaks.
z Do not spray the leak solution on wiring
openings, plugs or electrical
connections. Do not allow the solution
to drip on these locations.
Length
of pipe
in feet
Gas pipe supply volume in cubic feet of gas
per hour
1
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
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