Filling The Heating System And Checking For Water Leaks - Buderus Logano G234X Installation And Maintenance Instructions Manual

5.5 Filling the heating system and
checking for water 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.
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.
B Only fill the heating system when it is in a
cold state. Maximum permissible supply
temperature 100 °F (38 °C).
WARNING: Health risk from contaminated
domestic water!
B Observe all national standards and
regulations regarding prevention of
drinking water contamination (e.g. by
water from heating systems).
NOTICE: Risk of system damage due to
excess pressure when testing for leaks!
Pressure, control and safety equipment may
be damaged through excessive pressure.
B 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.
Water treatment
B Have the water analyzed before filling the
heating system.
B Compare the results of this analysis with
the technical documentation on water
quality for boiler water.
B 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 (
accordance with the local regulations.
Logano G234X - Technical specifications are subject to change without prior notice.
Tab. 9) and in
Installing the boiler
Maximum
operating pressure
30 psi (2.1 bar)
with the included safety
valve
58 psi (4 bar)
with a different safety valve
Tab. 9 Test pressures
B Seal off connection for safety valve in the heating
supply and all other unused connections with blanking
plugs.
B Isolate the expansion tank from the system by closing
the valve.
B Open the mixing and shut-off valves on the heating
water (primary) side.
B Slowly fill the boiler with tap water.
B Open the cap of the automatic air vent by one full turn
to allow air to escape.
B Slowly fill the heating system. Observe the pressure
gauge while filling.
Fig. 23 temperature/pressure gauge
B Check the connections and piping to make sure they
are watertight.
B Bleed the heating system via the purge valves on the
heating bodies.
B Top up with water if the operating pressure drops as a
result of bleeding the system.
NOTICE: System damage due to faulty
safety valve!
B Do not install the safety valve until the leak
test ( Section 5.5) has been completed.
B Install the safety valve vertically.
B Install the safety valve in accordance with
the requirements of the ANSI/ASME
Boiler and Pressure Vessel Code, Section
IV.
B Observe the local regulations for
connection of boiler systems.
5
Maximum
on-site testing pressure
45 psi (3.1 bar)
75 psi (5.2 bar)
7 747 019 141-17.1RS
21