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46
FA ROTEX HPSU monobloc compact • 09/2017
7
x
Service and maintenance
3.
Connect the drain hose to the vent valve, and route it away
from the device. Open the vent valve with the hose
connected; check to make sure that the other vent valve is
closed.
4.
Open the water tap (fig. 7-2, item 4) on the feed pipe.
5.
Open the KFE cock (fig. 7-2, item 2) and monitor the pressure
gauge.
6.
Fill the system with water until the external pressure gauge
shows that the system target pressure is reached (
system
2 m
; 1 m water column = 0.1 bar).
The overpressure valve is not to actuate!
7.
Close the manual vent valve as soon as water emerges free
of bubbles.
8.
Close the water tap (fig. 7-2, item 4). The KFE cock must
remain open to be able to read off the water pressure on the
external pressure gauge.
9.
Switch on the power supply to the HPSU monobloc compact.
10.
Set the rotary switch to the "Operating Mode"
position
and select "Heating".
Î
ROTEX After the start phase, the HPSU monobloc com-
pact runs in hot water heating operation.
11.
Constantly check the water pressure on the external pressure
gauge during hot water heating mode, and top up water via
the KFE cock (fig. 7-2, item 2) if necessary.
12.
Vent the entire heating system as described in chap. 5.1.4
(open the system's control valves. At the same time the
underfloor heating system can be filled and flushed by the
underfloor distributor.
13.
Again check the water pressure on the external pressure
gauge, and top up water via the KFE cock (fig. 7-2, item 2) if
necessary.
14.
Disconnect the filling hose (fig. 7-2, item 1) with non-return
valve from the KFE cock (fig. 7-2, item 2).
Air purge
(See controller operating instructions)
Fig. 7-2
Filling the heating and storage tank charging circuit
1
Filling hose with return flow
inhibitor (and manometer
1)
)
2
KFE cock
3
Heater ball cock - inflow
4
Heater ball cock - return flow
5.1
Valve drive
5.2
Unlocking button of the drive
lock
6
Water tap
7
Automatic bleeder
8
Pressure gauge
3UV DHW
3-way distribution valve
3UVB1
3-way mixer valve
1)
If not already installed in the heating system
Tab. 7-2 Legend for fig. 7-2