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Operating instructions Logano G215 WS oil/gas-fired special boilers • Issue 02/2006
We reserve the right to make any changes due to technical modifications.
Operation of the heating system3
3.4.4 Filling the heating system
Filling and refilling of the heating circuit must been
carried out by a method that has been approved by the
Water Regulation Advisory Scheme (WRAS), for the
type of heating appliances, i.e. Domestic (in-house)
Fluid Category 3. Non-Domestic (other than in-house)
Fluid Category 4. Depending on the Fluid Category the
approved method should comprise of the following:
1. Requirements Fluid Category 3 systems (fig see
below)
z Control valve (stop valve) including a double check
valve on the mains cold water supply pipe
z Temporary connection to e removed after filling
(filling loop)
z Control valve (stop valve) on the heating system
pipework
2. Requirements Fluid Category 4 systems (fig see
below)
z Control valve (stop valve) on the mains cold water
supply 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
pipework
z Shut off the pressure expansion vessel from the
system by closing the cap valve.
z Slowly fill the heating system. Observe the pressure
gauge whilst filling.
z Close the water tap and the boiler fill & drain valve
once the required operating pressure has been
reached.
Fig. 5 Requirements Fluid Category 3 systems
Fig. 6 Requirements Fluid Category 4 systems
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