Checking The Operating Pressure; Refilling Boiler Water And Purging The System - Buderus Logano G615 Installation And Service Instructions Manual

13.5 Checking the operating pressure

The operating pressure must be at least 15 psi (1 bar).
B Read the current operating pressure (psi) and
temperature ( °C or °F) from the temperature/pressure
gauge.
B If the operating pressure drops below 15 psi (1 bar), ref
boiler water.
Fig. 64 Pressure/temperature gauge
Logano G615 - Subject to technical modifications
System inspection and maintenance
13.6 Refilling boiler water and purging
B Slowly fill the heating system via the on-site fill valve.
During filling, observe the display (pressure gauge).
B Once the desired operating pressure is reached, stop
the procedure.
B Purge the heating system via the purge valves on the
system.
B Fill with water again if the operating pressure drops as
7 747 019 141-17.1RS
a result of purging the system.
the system
NOTICE: Risk of system damage from
temperature stresses.
B When the heating system is in operation,
do not fill it via the boiler fill & drain valve.
Instead, fill it on the system side.
Bring the system up to the required operating
pressure.
NOTICE: Risk of system damage due to
frequent refilling.
B The system may be damaged, depending
on water quality, by corrosion or scaling, if
you frequently need to re-fill your system
with make-up water.
B Ensure that your heating system is bled.
B Check the heating system for leaks and
the function of the expansion vessel.
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