9 Taking out of operation
Installation and maintenance instructions
54
Daikin Altherma EHS(X/H)(B)-D
Heat pump (indoor unit) with integrated heat accumulator
008.1444099_01 – 11/2018 – EN
9 Taking out of operation
DANGER: RISK OF BURNING
When opening the solar return flow connection and the
heating and hot water connections, there is a danger of
scalding and flooding from escaping hot water.
▪ Only empty the storage tank or heating system when it
has cooled down sufficiently and if it is provided with a
suitable device for safely draining off or collecting the es-
caping water.
▪ Wear suitable protective clothing.
9.1 Temporary shutdown
CAUTION
A heating system that is shut down can freeze in the event
of frost and may suffer damage.
▪ Drain the heating system that is shut down if there is
danger of frost.
▪ If the heating system is not drained, the power supply
must be ensured and the external main switch must re-
main switched on if there is a danger of frost.
If the indoor unit is not required for a prolonged period, it can be tem-
porarily decommissioned.
However, we recommend not to disconnect the system from the
power supply but merely to switch it to "Standby mode" (see Control-
ler operating instructions).
The system is then protected from frost. The pumps and valve pro-
tection functions are active.
If it is not possible to guarantee the power supply when there is
danger of frost,
▪ completely discharge the indoor unit on the water side, or
▪ apply suitable antifreeze measures to the connected heating sys-
tem and hot water storage tank (e.g. draining).
INFORMATION
If there is a danger of frost for only a few days with uncer-
tainly in the gas and power supply, the indoor unit does not
need to be drained because the heat insulation is excellent
as long as the storage tank temperature is observed regu-
larly and does not fall below + 3°C.
However, this provides no frost protection for the connec-
ted heat distribution system.
9.1.1 Draining the storage tank
1 Switch off the main switch and secure against restarting.
2 Connect the drain hose to the combined filling and draining
filling connection (combined filling and drainingBA ac-
cessories) (Fig. 9-1, itemA) and to a waste water drainage
point which is at least at ground level.
INFORMATION
If no combined filling and draining filling connection is
available, the connecting piece (Fig. 9-1, itemC) can be
detached from the safety overflow (itemB) and used.
This must be re-installed after the draining process before
the heating system is put back into operation.
Fig.9-1 Installing the drain hose; optional: Detaching the con-
necting piece from the safety overflow
Item Designation Item Designation
A Combined filling
and draining
connection
(combined filling
and draining BA
accessory)
E Threaded piece
B Safety overflow F Sealing plug
C Hose connect-
ing piece for
safety overflow
G Connecting
bracket
D Clamping piece X Valve insert
Tab.9-1 Legend for Fig. 9-1 to Fig. 9-6
Without solar system:
1 Remove the cover panel on the filling and draining connection.
2 When using the combined filling and draining connection
(combined filling and draining BA accessory):
Remove the cover panel on the handle and unscrew the threaded
piece (Fig. 9-2, itemE) from the storage tank.
Fig.9-2 Unscrewing the threaded piece
1 Insert the combined filling and draining filling connection in the
threaded piece (Fig. 9-3, itemE) and secure with the clamping
piece (Fig. 9-3, itemD).
2 Place a suitable collecting tray under the filling and draining con-
nection.
3 Unscrew the threaded piece on the filling and draining connec-
tion (Fig. 9-4, itemE), remove the sealing plug (Fig. 9-4, itemF)
and immediately screw in the pre-installed threaded insert with
combined filling and draining filling connection into the
filling and draining connection (Fig. 9-4) again.
CAUTION
After removing the sealing plug, storage tank water surges
out.
There is no valve or check valve on the filling and draining
connection.
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