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Fig. 11-3
Completing the combined filling and draining filling con-
nection
Fig. 11-4
Screwing the combined filling and draining filling connec-
tion into the filling and draining connection
6
Open the fill/drain cock on the KFE filling connection and drain
the water content of the storage tank.
Only with
solar system
1
Adjust the valve insert on the connection bracket so that the path
to the blind plug is blocked off
2
Place a suitable collecting tray and remove the blind plug from
the connection bracket
(Fig.
Fig. 11-5
Shut off the valve insert, remove the blind plug from the
connection bracket
Gas Combi Unit
Floor-standing gas condensing boiler with integrated heat storage
008.1543899_02 – 04/2019 – EN
(Fig.
11-5).
11-5).
11
Taking out of operation
3
Insert the combined filling and draining filling connection in
the connection bracket and secure with the holding clamp
(Fig.
11-6).
Fig. 11-6
Installing the combined filling and draining filling connec-
tion in the connection bracket
4
Open the fill/drain cock on the KFE filling connection.
5
Adjust the valve insert on the connection bracket so that the path
to the drain hose is open (see also
content of the storage tank.
11.1.2
Draining the heating circuit and hot water
circuit
1
Switch off the main switch and secure against restarting.
2
Close the gas stop valve.
3
Connect the drain hose to the combined filling and draining valve
of the GCU compact.
4
Open the combined filling and draining valve on the GCU com-
pact.
5
Drain the heating and hot water circuits.
6
Disconnect the heating inflow and return flow as well as the cold
water inflow and the hot water outflow from the GCU compact.
7
Remove the thermal insulation from the hydraulic group
(see Chap.
4.4.3).
8
Disconnect the hydraulic group/heat cell connection (pull out the
securing clip), remove the 3UV DHW 3-way valve and unscrew
the heat exchanger for storage tank charging.
9
Remove the hydraulic group.
10 Connect the drain hose to the cold water inlet and hot water out-
let as well as the heat exchanger for storage tank charging so
that the hose opening is leakproof above the ground.
11 Allow the individual heat exchangers to run empty one after the
other based on the suction lifter method.
12 Put the hydraulic group back on again and re-attach the thermal
insulation (steps 7 to 9 in reverse order).
Fig.
11-5) and drain the water
Installation and operating instructions
65
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