Buderus Logano GE615 Installation And Maintenance Instructions Manual page 52

7
Heating system inspection and maintenance
2 Requirements Fluid Category 4 systems (Fig. 35 see
right)
z Control valve (stop valve) on the mains cold water sup-
ply pipe
z Strainer
z Verifiable Backflow Prevention Device with reduced
pressure Zone(RPZ valve assembly) incorporating a
Type BA air gap
z Tundish
z Control valve (stop valve) on the heating system pipe-
work
z Open the cap of the automatic air vent by one full turn
to allow air to escape.
z Slowly fill the heating system. Observe the pressure
gauge whilst filling.
z Close the water tap and the boiler drain valve once the
required operating pressure has been reached.
z Bleed the system via the radiator bleed valves.
z Top up with water if the pressure drops as a result of
bleeding the system.
z Take the hose off the boiler drain valve.
Caution: System damage
through frequent topping up.
The heating system may be damaged,
depending on water quality, by corrosion or
scaling if you frequently need to top-up the
heating water.
z Enquire from your installer, whether you can use your
public water untreated or whether you need to treat it
before filling your system.
z Notify your installer, if you need to regularly add top-up
water to your system.
52
Fig 70 Requirements Fluid Category 4 systems
Logano GE615 - We reserve the right to make any changes due to technical modifications.
Mains cold Mains cold Mains cold
Stop cock Stop cock Stop cock Strainer Strainer Strainer
water water water
RPZ RPZ RPZ Stop cock Stop cock Stop cock
Heating Heating Heating
System System System
Tundish Tundish Tundish