Installation At High Altitudes; Filling Heating System And Checking For Leaks - Buderus Logano US GC 144 II Installation And Service Instructions Manual

Gas carrying capacity ( chapter 16, page 29)
Equivalent lengths for pipe fittings in feet
Nominal
Pipe fitting type
diameter
90°-
of iron
angle T-piece
pipe
(inches) Equivalent lengths in feet
1/2 1.4 2.7
3/4 2.1 4.1
1 2.6 5.2
1 1/4 3.5 6.9
1 1/2 4.0 8.0
Table 6 Equivalent lengths for pipe fittings
Length of Gas pipe supply volume in cubic feet of gas per hour
pipe in
feet 1/2 3/4
10 132 278
20 92 190
30 73 152
40 63 130
50 56 115
75 45 93
100 38 79
150 31 64
Table 7 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.
Disconnect the boiler with the manual shut-off valve and physically
separate the boiler from the gas piping if the gas piping system is
pressure tested with a test pressure greater than 1/2 psi.
If the gas supply pipe system is pressure tested at a test pressure of 1/2
psi or less, it is sufficient to disconnect the boiler from the gas pipe
system by closing the manual shut-off valve.
Use only sealant that is resistant to corrosion by LPG for pipe
connection. Only a small amount of sealant must be applied to the
external thread of the pipe connections.
If you wish to convert the boiler to propane, please contact Buderus for
the required conversion components. Do not attempt to convert the
boiler without the approved Buderus propane conversion parts and the
relevant technical documentation. The technical documentation is
included with the propane conversion parts.
Logano GC 144 II – 6 720 808 893 (2017/02)
Shut-off
valve Gas shut-off
0.3 0.80
0.5 1.25
0.6 1.6
0.8 2.15
0.9 2.50
1
1 1 1/4 1 1/2
520 1060 1600
350 730 1100
285 590 890
245 500 760
215 440 670
175 360 545
160 305 480
120 250 380
7.4.2

Installation at high altitudes

The boiler is designed for installation at altitudes below 8500 feet above
sea level.
If the installation location is over 8500 feet above sea
level, please contact Buderus for another product option
as the GC 144 II is not approved above 8500 feet
operation.
NOTICE: System damage due to dirt.
If the boiler is assembled and not in use, note the
following:
▶ Protect the boiler connections from dirt by closing
the connections.
7.5

Filling heating system and checking for leaks

The boiler is tested for leaks at the factory. Before placing the heating
system into use, check the entire system for soundness to avoid leaks
occurring during operation.
Water treatment
Have the water analyzed before filling the heating
system. The water may require treatment as a result of
the analysis.
Please consult the local water supply company if the
water is extremely hard or has a pH level below 7.0.
NOTICE: System damage due to overpressure during
the leak test. Pressure, control or safety components
may be damaged by high pressure.
▶ Before conducting the leak test make sure that no
pressure, control or safety components that cannot
be disconnected from the water compartment of the
boiler are installed.
Carry out the leak test at 1.5 times the normal operating pressure and as
specified by the local codes as follows:
Maximum operating pressure
30 psi (based on supplied relief
valve)
58 psi (with special relief valve)
Table 8 Pressure Test
▶ Close connection for relief valve ( figure 14, page 12) and all other
open connections with plugs.
▶ Disconnect the expansion tank from the system by closing the
expansion tank shut-off valve.
▶ Open mixing and shut-off valves on hot water side.
▶ Fill boiler slowly with water from the feed water connection.
▶ Open automatic vents slightly to allow the air to escape.
▶ Slowly fill heating system. Observe pressure display on pressure
gauge during this process.
▶ Check connections and pipes for leaks.
▶ Bleed heating system through the bleed valves on the radiators or
other air elimination components or high points in the system.
▶ If the pressure drops during air bleeding, water must be added.
▶ Install pressure relief valve ( figure 14, page 12).
7
Boiler installation
Maximum test pressure
45 psi
75 psi
11