Installation
6 720 802 419 (2012/06) en
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9.10 Filling the heating system
B
Set the pre-pressure for the expansion vessel in the premises
according to the heating unit's statistical height.
B
Open the heating system's valves.
B
Open the stopcock on the particle filter, fill the heating system to
between 1 and 2 bar and close it.
B
Vent the heating system.
B
Refill the heating installation to between 1 and 2 bar.
B
Check all connections for leaks.
9.11 Filling the collector system
The collector system is filled with collector circuit fluid which must
guarantee antifreeze protection until –15 °C. We recommend bio-
ethanol or a mixture of water and propylene glycol.
A rough estimate of the amount of collector circuit fluid that is required
in relation to the length of the collector system and the inner diameter of
the pipe can be made using table 18.
The following description of filling presupposes the use of the filling
station accessory. Follow corresponding steps if other equipment is
used.
Fig. 21 Filling unit
B
Connect two hoses from the filling station to the filling unit (
Æ
Figure 22).
Fig. 22 Filling with filling station
B
Fill the filling station with collector circuit fluid. Fill water before you
fill antifreeze.
B
Turn the valves on the filling unit so that they are in filling position (
Æ
Figure 23).
Fig. 23 Filling unit in filling position
WARNING:
The water heater can crack if filling is
performed in the wrong order.
B
Fill and pressurise the water heater
before
filling the
heating system.
Only glycol and alcohol are permitted.
Inner diameter
Volume per metre
Single pipes
Double U pipes
28 mm
0.62 l
2.48 l
Table 18
Single U pipes, consisting of one descending and one
ascending pipe, are most often used as a rock collector.
6 720 641 570-06.1I
6 720 641 570-06.1I
