Topping Up The Heating System - Buderus 800-24 User Manual

6.2

Topping up the heating system

WARNING
The wall-mounted condensing gas boiler
must not be activated at this stage.
When using oxygen-permeable pipes (e.g. for floor
heating), heat exchangers must be used to separate the
system.
 Move the mechanical switch on the three-way valve
to centre position (fig. 2) (applicable for 24T25 and
29T25 only and systems with an external storage-
type water heater).
 Connect temporary hose of the filling loop.
 Open both stop valves.
 Fill the system to a pressure of 1.0 to 1.2 bar (fig. 4).
Max. water pressure is 2.0 bar.
 Shut both stop valves and disconnect the filling loop.
6.3 Combustion fuels
Natural gas, propane.
Wall-mounted condensing gas boiler Buderus 800 - Subject to modifications resulting from technical improvements!
fig. 2 Mechanical switch on the three-way valve
stop
valve
double
check
valve
DHW
cold
fig. 3 Connecting temporary hose
I 11
KW
0 1
0
1 2
1 10
1
10
1 10
fig. 4 Pressure display
Commissioning
stop
valve
temporary
hose CH
return
6
5