Installation Instructions

5
Installing the boiler
Logano G115 WS US/CA - Technical specifications are subject to change without prior notice.
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.
V Seal pressure relief valve connection (Æ Fig. 14
"Installing B-Kit", page 19) and all other open connec-
tion with blind plugs.
V Isolate the expansion tank from the system by closing
the valve.
V Open the mixing and shut-off valves on the heating
water (primary) side.
V Slowly fill the boiler with tap water.
Fig. 17 Pressure/temperature gauge
Caution: Risk of system damage from ex-
cess pressure when testing for leaks.
Pressure, control and safety equipment may
be damaged by excessive pressure.
V 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.
V Only fill the heating system when cold (the
flow temperature should be no more than
100 °F).
V Pay attention to the water quality as spec-
ified 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
Tab. 12 Maximum testing pressure
7 747 019 141-17.1RS