Decommissioning; Temporary Shutdown; Draining The Storage Tank - Daikin EKHHP300A2V3 Manuel D'installation Et D'utilisation

4

Decommissioning

WARNING!
Danger of scalding and flooding when opening the
solar return flow coupling or hot water connections due
to escaping hot water.
● Draining the storage tank only
– after it has cooled down for a long enough
period,
– with a suitable device for the safe draining or
catching of escaping water,
– wearing appropriate protective clothing.

4.1 Temporary shutdown

CAUTION!
A shut down Hot water heat pump can freeze in the
event of frost and may suffer damage.
● Drain the water out of the shut down Hot water
heat pump if there is a risk of frost.
● If the Hot water heat pump is not drained and there
is a risk of frost, the power supply must be secured
and the external main switch must remain switched
on.
If the DAIKIN EKHHP is not needed for a long time, it can be tem-
porarily decommissioned.
However, DAIKIN recommends not disconnecting the system
from the power supply, but just switching it off (actuate
button ).
The system is then protected from frost.
If it is not possible to guarantee the power supply when there is
danger of frost,
– completely discharge the DAIKIN EKHHP on the water side.
If there is a danger of frost and the power supply cannot
be guaranteed for just a few days, the unit's excellent
heat insulation means that the DAIKIN EKHHP does
not have to be drained, provided that the storage tank
temperature is monitored regularly and does not fall
below +3°C.
However, this does not provide frost protection for the
connected heat distribution system.

4.1.1 Draining the storage tank

● Disconnect the DAIKIN EKHHP from the power supply.
● Remove connection piece (fig. 4-1, item C) from safety
overflow (fig. 4-1, item B).
● Connect the drain hose to the hose connection piece (item C)
and to a waste water drainage point which is at least at
ground level.
As an alternative, you can use the optional KFE fill-
ing connection (KFE BA).
DAIKIN EKHHP(3/5)00AA2V3
DAIKIN Hot water heat pump
008.1423444_02 – 09/2015
B Safety overflow
Fig. 4-1 Connecting the drain
hose
● Remove the cover plate
from the filling and
emptying fitting.
● Place a suitable collection trough beneath the filling and
emptying fitting.
● Unscrew the threaded piece (fig. 4-3, item E) at the filling and
draining connection, and remove the plug (fig. 4-3, item F)
and immediately screw in the pre-assembled hose
connector (fig. 4-1, item C) into the filling and draining
connection (fig. 4-3) again.
CAUTION!
Storage water will gush out as soon as the sealing
plug is removed.
There is no valve and no non-return flap on the
filling and draining connection.
Fig. 4-3 Screwing pre-assembles connector into the filling and
draining connection
4 x Decommissioning
C Hose connection piece for
safety overflow
E Threaded piece
Optional: Removing the connec-
tion piece from the safety overflow
E
Fig. 4-2 Unscrew threaded piece
Installation and maintenance manual
17