Filling The Heating System - Buderus Logamax plus GB162-100 User Manual

 Unscrew the sealing cap (fig. 9).

5.1.1 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:
Requirements Fluid Category 3 systems (fig. 10)
– Control valve (stop valve) including a double check
valve on the mains cold water supply pipe.
– Temporary connection to be removed after filling (fill-
ing loop).
– Control valve (stop valve) on the heating system
pipework.
Requirements Fluid Category 4 systems (fig. 11)
– Control valve (stop valve) on the mains cold water
supply pipe.
– Strainer.
– Water non return valve with Reduced Pressure Zone
(RPZ valve assembly) incorporating a Type BA air
gap.
– Tundish.
– Control valve (stop valve) on the heating system
pipework.
Logamax plus GB162-65/80/100 - Subject to modifications resulting from technical improvements!
Commissioning the heating system
fig. 9 Removing cap from drain cock
SYSTEM FILL
Heating return
Non return
Hose
return
Stop
cock
Temporary hose
fig. 10 System fill - category 3
Stop
Mains
Strainer
cock
cold water
fig. 11 System fill - category 4
Non return
valve valve
Mains
supply
Stop cock
Test cock
Stop
RPZ
cock
Tundish
5
13