Filling Heating System And Checking For Leaks - Buderus Logano G334 X Installation And Maintenance Instructions Manual

7 Boiler installation
7.8

Filling heating system and checking for leaks

The boiler is tested for leaks at the factory. Before
placing the heating system tank into use, check it for
soundness to avoid leaks occurring during operation.
Water treatment
USER NOTE
Have the water analyzed before filling
the heating system.
Compare the results of this analysis
with the
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 level below 7.0.
SYSTEM DAMAGE
due to overpressure during the leak test.
Pressure, control or safety components
CAUTION!
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:
Close valve at supply connection (
Close open connections with blank plugs.
Disconnect the expansion tank from the system by
closing the cap valve.
Open mixing and stop valves on hot water side.
Fill boiler slowly with water from the building
connection.
Turn cap of automatic vent one revolution 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.
If the pressure falls while bleeding, water must be
added.
Install relief valve.
22
technical documentation
page 15).
Installation and maintenance instructions Logano G334 X gas-fired boiler • Issue 09/2005
Fig. 19 Temperature/pressure gauge (owner installation)
Maximum
operating pressure
30 psi (with the included relief
valve)
58 psi (with a different relief
valve)
Tab. 6 Test pressures
We reserve the right to make any changes due to technical modifications.
Maximum
construction site test
pressure
45 psi
75 psi