Decommissioning; Temporary Shutdown; Draining The Storage Tank - Daikin EKHHP300AA2V3 Installation And Operating Instructions Manual

6

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 longe nough
period,
– with a suitable device for the safe draining
or catching of escaping water,
– wearing appropriate protective clothing.

6.1 Temporary shutdown

CAUTION!
A shutdown hot water heat pump can freeze in
the event of frost and may suffer damage as a
result.
● Drain the water out of the shutdown 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 ensured 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,
– the DAIKIN EKHHP must be fully drained of water.
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 con-
nected heat distribution system.
DAIKIN EKHHP(3/5)00AA2V3
DAIKIN Hot water heat pump
008.1423444_05 – 08/2016

6.1.1 Draining the storage tank

● DAIKIN Disconnect the EKHHP from the power supply.
● Remove connection piece (Fig. 6-1, Item C) from safety
overflow (Fig. 6-1, 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.
Alternatively, you can use the optional KFE filling
connection (KFE BA).
B Safety overflow
Fig. 6-1 Connecting the drain-
age 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. 6-3, Item E) at the filling
and draining connection, and remove the plug (Fig. 6-3, Item
F) and immediately screw in the pre-assembled hose
connector (Fig. 6-1, Item C) into the filling and draining
connection (Fig. 6-3) 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.
6 x Decommissioning
C Hose connection piece for
safety overflow
E Threaded piece
Optional: Removing the connec-
tion piece from the safety overflow
E
Fig. 6-2 Unscrew threaded piece
Installation and operating instructions
19