Testing Gas And Water Connections For Leaks - Bosch ZBR16-3A Installation And Service Instructions Manual

5.9 Testing gas and water connections for
leaks
NOTICE: System damage!
Pressure, control and safety equipment may
be damaged by excessive pressure.
B When you carry out a leakage test, make
sure that no pressure, control or safety
equipment is installed that cannot be
isolated from the test pressure.
B The boiler and its dedicated shutoff valve
must be disconnected from the gas supply
piping system during any pressure testing
of that system at test pressures in excess
of 14" W.C. (35 mbar).
Water connections
B Open the heating supply and return valves and fill the
heating system.
B Check all connections for leakage (test pressure: Max.
30 psi (2.07 bar) on the pressure gauge).
Gas line
B Close the gas shutoff valve to protect the gas valve from
damage.
B Check all connections for leakage (test pressure: Max.
60" W.C. (150 mbar)).
B Release pressure.
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