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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.
Subject to modifications resulting from technical improvements !
Users manual Buderus 800 - 24/29/43/60 and 800 - 24T25/29T25 H/V • Edition 02/2006
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
Buderus Ltd. • http://www.buderus-domestic.co.uk
Users manual
stop
valve
temporary
hose
CH
return
5
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