Filling The Heating System And Checking For Leaks - Buderus Logano plus GB312 Installation And Maintenance Instructions Manual

5
Installation
5.6

Filling the heating system and checking for leaks

Before commissioning, check the heating system for
leaks to prevent problems during operation.
B Ensure all heating circuits are open with all
thermostatic valves fully on.
B Ensure all automatic air vents are able to operate.
NOTICE: System damage through boiler
scaling!
B Note the information specified in the
operator's log.
NOTICE: Risk of system damage from
excess pressure when testing for leaks!
Pressure, control and safety equipment may
be damaged by excessive pressure.
B After filling, pressure-test the heating
system with a pressure equal to the
response of the safety valve.
NOTICE: System damage!
If the heating system is filled when hot, the
resulting temperature stresses can cause
stress cracks. The boiler will then leak.
B Only fill the heating system when cold
(the flow temperature should not exceed
40 °C).
B Pay attention to the water quality as
specified in the operator's log, and record
the volume and quality of fill water used.
CAUTION: Health risk from contaminated
drinking water!
B Observe all regulations and standards
applicable in your country regarding the
prevention of drinking water
contamination.
B In Europe, observe standard EN 1717.
The heating system should be filled by a method that has
been approved by the Water Regulations Advisory
Scheme (WRAS) for the type of heating appliance. Non
domestic sealed systems are covered by fluid category 4.
This means that an assembly incorporating an RPZ valve
will be necessary.
If an auto fill unit is used it is important to ensure that each
boiler in a system has its own expansion vessel adjacent
to the boiler in accordance with BSEN 12828. The
connection of the auto fill unit into the heating system
should be in the flow header, to avoid causing thermal
stress to the boiler.
24
Check the connections and pipe work for leaks.
Vent the heating system via all air vents on the system.
Once the heating system has been tested, vented and
there are no leaks, set the system operating pressure.
Logano plus GB312 - Subject to technical modifications.