5
Installing the boiler
Logano GB125 BE US/CA - Subject to technical modifications.
24
5.5
Filling the 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.
Carry out the leak test at 1.5 times the normal operating
pressure and in accordance with the local regulations.
B
Seal off connection for safety valve
(
Æ
Fig. 16, page 22) and all other unused connections
with 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.
Fig. 19 Pressure/temperature gauge
CAUTION:
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
equipment that cannot be isolated from
the boiler water chamber is installed.
CAUTION:
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 cold (the
supply temperature should be no more
than 100 °F).
B
Pay attention to the water quality as
specified in the operator's log, and record
the volume and quality of the water used
to fill the system.
Maximum
operating pressure
Maximum
test pressure
30 psi (2 bar) (with the
included safety valve)
45 psi (3 bar)
Tab. 13 Maximum test pressure
7 747 019 141-17.1RS
