5
Installing the boiler
Logano G115 WS US/CA – 6 720 813 418 (2019/09)
21
5.3
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 standard operating pressure and
in accordance with the codes.
▶ Seal pressure relief valve connection (
page 19) and all other open connection with blind 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.
Fig. 17 Pressure/temperature gauge
CAUTION:
Risk of system damage from excess pressure
when testing for leaks.
Pressure, control and safety equipment may be
damaged by excessive pressure.
▶ 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 fitted.
CAUTION:
Risk of damage to system due to temperature
stresses.
If you fill the heating system when it is hot, the resulting
temperature stresses can cause stress cracks. The
boiler will then leak.
▶ Only fill the heating system when cold (the flow
temperature should be no more than 100 °F).
▶ 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
on-site testing pressure
30 psi (with safety valve
supplied)
45 psi
58 psi (with 50 psi relief valve)
75 psi
Table 12 Maximum testing pressure
7 747 019 141-17.1RS
