9
x
Service and maintenance
9.2.5 Filling, topping up the heating system and
storage tank charging circuit
1.
Connect the filling hose (fig. 9-4, item 1) with the non-return
valve and an external manometer
1)
(on the building side) to
the KFE cock (fig. 9-4, item 2) and secure it against slipping
off with a hose clamp.
2.
Make sure that the automatic vent valve cap is open (fig. 9-5,
item A).
3.
Open the water tap (fig. 9-4, item 6) on the feed pipe.
4.
Open the KFE cock (fig. 9-4, item 2) and observe the
pressure gauge (fig. 9-4, item 8).
5.
Fill the system with water until the pressure gauge shows that
the system target pressure is reached (
system 2 m
,
1 m water column corresponds to 0.1 bar).
The
overpressure valve is not to actuate!
6.
Close the KFE cock (fig. 9-4, item 2).
7.
Vent the hydraulic block (see chap. 9.2.6).
8.
Close the water tap (fig. 9-4, item 6) on the feed pipe.
9.
Disconnect the filling hose (fig. 9-4, item 1) with non-return
valve from the KFE cock (fig. 9-4, item 2).
DANGER!
During the filling process water may escape from any leaking
points that can cause an electric shock if it comes into contact
with live parts.
●
Before the filling process, de-energise the GCU compact.
●
After the first filling and before switching on the
GCU compact at the mains switch, check whether all electric
parts and connection points are dry.
WARNING!
Polluted domestic water is hazardous to health.
●
When filling the heating system, make sure that heating
water cannot flow back into the domestic water pipe.
Comply with the instructions for water connection (see
chap. 4.6) and water quality (see chap. 1.2.5).
Fig. 9-4
Filling the heating system and storage tank charging circuit
(shown on the GCU compact 5xx)
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
Tab. 9-1 Legend for fig. 9-4
1)
if not already installed in the heating system
A
Automatic vent valve cap
Fig. 9-5
Undoing the automatic vent valve cap
Summary of Contents for GCU compact 315
Page 81: ...13 x Notes 13 Notes...
Page 82: ...13 x Notes...
