7 x Service and maintenance
FA ROTEX HPSU compact (V5) •
55
11. Vent the entire heating installation as described in
chapter 5.1.4 (open the regulating valves on the installation.
At the same time the underfloor heating system can be filled
and
flushed with the underfloor heating distributor.).
12. In
spect the water pressure at the external pressure gauge
again. Where necessary, refill with water via the KFE cock
(fig. 7-2, item 2).
13. Disconnect the filler hose (fig. 7-2, item 1) with flow-back
preventer from the KFE cock (fig. 7-2, item. 2).
Air Purge
(see operating manual of the control unit)
1 Filler hose
2 KFE c
ock
3 Ball c
ock
4 Water
cock
5.1 Valve drive
5.2 Unlocking button
of the drive
lock
6 Automatic bleeder
3UVB1, 3UV DHW
3-way diverter valve
Fig. 7-2 Filling the heating circuit
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