Decommissioning; Temporary Shutdown; Draining The Storage Tank - Daikin Altherma EHS Serie Manual De Instrucciones E Instalación

6

Decommissioning

WARNING!
Danger of scalding and flooding when
opening the solar return flow coupling or
heating and hot water pipes due to es-
caping hot water.
Only drain the storage tank container
or heating system
– when they have been left to cool
sufficiently,
– with a suitable device for the safe
draining or catching of escaping
water,
– wearing appropriate protective
clothing.

6.1 Temporary shutdown

CAUTION!
A heating system which is shut down can
freeze in the event of frost and may
suffer damage.
If there is any risk of frost, drain any
water from the decommissioned
heating system.
If the heating system is not drained
and there is a risk of frost, the power
supplies must be secured and the
external main switch must remain
switched on.
If the Daikin Altherma EHS(X/H) is not needed for a long time, it
can be temporarily decommissioned.
Daikin therefore recommends that you do not disconnect the
system from power supply, but rather only place it in "Stand-By
Mode" (consult the operating manual for the control system).
The system is then protected from frost. The pumps and valve
protection functions are active.
If it is not possible to guarantee the power supply when there is
danger of frost,
– completely discharge the Daikin Altherma EHS(X/H) on the
water side, or
– suitable antifreeze measures must be taken for the connected
heating system and hot water storage tank (e.g. draining).
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 Altherma
EHS(X/H) 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.
Daikin Altherma EHS(X/H)
Daikin Altherma integrated solar unit
008.1441399_02 – 01/2021 – EN

6.1.1 Draining the storage tank

Disconnect the Daikin Altherma EHS(X/H) from the power
supply.
Connect the outlet hose to the KFE filling connection
(accessory KFE BA) (fig. 6-1, item A) and run to a drainage
point that is at least soil deep.
If no KFE filling connection is available, the con-
nection piece (fig. 6-1, item C) can alternatively be
removed from the safety overflow (fig. 6-1, item B)
and used.
Once the drainage process is complete, this must
be replaced before the heating system can be
started again.
Fig. 6-1 Connecting the drain
hose
A KFE filling connection (ac-
cessory KFE BA)
B Safety overflow
C Hose connection piece for
safety overflow
D Clamping piece
Tab. 6-1 Legend from fig. 6-1 to fig. 6-6
Without solar installation
Remove the cover plate
from the filling and
emptying fitting.
When using the KFE
filling connection
(accessory KFE BA):
Remove the cover plate
from the handle and
unscrew the threaded
piece (fig. 6-2, item E)
from the storage tank con-
tainer.
6 x Decommissioning
Optional: Removing the connec-
tion piece from the safety overflow
E Threaded piece
F Sealing plug
G Connecting angle
X Valve insert
E
Fig. 6-2 Unscrew threaded piece
Installation and operating instructions
45