Converting Boiler To Propane; Filling Heating System And Checking For Leaks - Buderus Logano G234X Installation And Service Instructions Manual

Leak test
DANGER: Risk of explosion!
Leakage from the gas pipes and gas connections may
cause an explosion.
▶ Carry out a proper leakage test using leak detector
fluid.
NOTICE: Risk of system damage due to short-circuits!
▶ Cover the areas at risk before carrying out the leakage
test.
▶ Do not spray leak detector onto cable conduits, plugs
or electrical connecting leads or allow it to drip onto
them.
Use only sealant that is resistant to corrosion by LPG for
the pipe connections. The sealing compound must be
applied sparingly to the male thread of the pipe
connections.
▶ Test the boiler and gas supply connections for leaks before
commissioning ( page 18).
Pressure tests
Disconnect the boiler and its gas isolating valve form the gas supply pipe
system if that system is subjected to pressure tests in which the test
pressure exceeds 0.5 psi (34.5 mbar).
If the gas supply pipe system is pressure tested at a test pressure of 0.5
psi (34.5 mbar) or less, it is sufficient to disconnect the boiler from the
pipe system by closing the stop valve.

5.4.2 Converting boiler to propane

The boiler is factory-set for operation with natural gas.
If you wish to convert the boiler to propane, please
contact Buderus for the required conversion
components.
Do not attempt to convert the appliance without the
approved Buderus parts and the relevant technical
documentation. The technical documentation is
included with the conversion parts.
For information about the identification of the main gas
orifice and the nominal gas orifice pressure for natural
gas and propane gas, see section 2.8.3, page 7.
Logano G234X – 6 720 804 886 (2012/08)
5.5

Filling heating system and checking for leaks

The boiler is tested for leaks at the factory. Before putting the heating
system into operation, it must be checked to ensure that no leaks will
occur during operation.
WARNING: Risk of system damage due to excess
pressure when testing for leaks!
Pressure, control and safety equipment may be
damaged through excessive pressure.
▶ When you carry out a leakage test, make sure that no
pressure, control or safety device that cannot be
isolated from the boiler water chamber is installed.
WARNING: Health risk from contaminated domestic
water!
▶ Observe all national standards and regulations
regarding prevention of drinking water contamination
(e.g. by water from heating systems).
NOTICE: Risk of damage to system due to temperature
stress!
If you fill the heating system when it is hot, the resulting
temperature stress can cause stress cracks. The boiler
will then leak.
▶ Only fill the heating system when it is in a cold state.
Maximum permissible supply temperature 100 °F
(38 °C).
Water treatment
▶ Have the water analyzed before filling the heating
system.
▶ Compare the results of this analysis with the technical
documentation on water quality for boiler water.
▶ Please consult the local water supply company if there
are major differences, such as extremely hard water
or a pH value below 7.0.
Carry out the leak test at 1.5 times the normal operating
pressure ( Tab. 9) and in accordance with the local
regulations.
Maximum
operating pressure
30 psi (2.1 bar)
with the included safety valve
58 psi (4 bar)
with a different safety valve
Table 9 Test pressures
▶ Seal off connection for safety valve in the heating supply and all other
unused connections with blanking plugs.
▶ Isolate the expansion tank from the system by closing the valve.
▶ Open the mixing and shut-off valves on the heating water (primary)
side.
▶ Slowly fill the boiler with tap water.
5
Boiler installation
Maximum
on-site testing pressure
45 psi (3.1 bar)
75 psi (5.2 bar)
13