Daikin EKHWP300B [17/28] Temporary shutdown

Daikin EKHWP300B [17/28] Temporary shutdown
5 x Taking out of service
Daikin EKHWP300+500
Daikin High-performance hot water storage tank
008.1618744 – 08/2015
Installation and maintenance manual
17
5 Taking out of service
If installed: Switch off the power supply to the Daikin
Booster Heater.
5.1 Temporary shutdown
CAUTION!
A heating system which is shut down can freeze in the
event of frost and may suffer damage.
In the event of a danger of frost, start the entire
Daikin heating system up again and activate the
frost protection function or take the appropriate
frost protection measures for the hot water storage
tank (e.g. by draining).
If the danger of freezing will only last for a few days, the
very good heat insulation of the Daikin EKHWP means
that it need not be drained, as long as the storage tank
temperature is observed regularly and not permitted to
fall below +3 °C. This does not, however, provide any
pro
tection against frost for the connected heat distribu-
tion system!
If a storage tank temperature of less than +3 °C is
rea
ched, the STB of the Booster Heater triggers auto-
matically. This prevents consequential damage to the
electric immersion heater caused by frost when starting
up again.
5.2 Draining the storage tank
WARNING!
Danger of scalding caused by emerging hot water
from the storage tank.
Allow the hot water storage tank to cool down
adequately before any installation work.
Wear protective gloves.
5.2.1 With pre-mounted KFE filling connection
Connect the drain hose to the KFE filling connection
(fig. 5-1 / fig. 5-2) and to a waste water drainage point which
is at least at ground level.
Onl
y with solar system:
Adjust the valve insert on the connecting angle so that the
path
to the drain hose is opened (fig. 5-2).
Open the KFE filling connection and drain the water out of
the storage tank fig. 5-1 / fig. 5-2).
1.
2.
Fig. 5-1 Draining process with-
out
solar system
Fig. 5-2 Draining process with
solar system
5.2.2 With subsequently fitted KFE filling connection
Subsequent fitting of the KFE filling connection (accessory
KFE BA).
Drai
n the storage tank content as described in section 5.2.1.
5.2.3 Without KFE filling connection
With
solar system
Draining only possible only with KFE filling con-
nection (accessory KFE BA) (see section 5.2.1).
Without solar system
Draining with KFE filling connection (accessory KFE
BA) is recommended.
Alternative:
1. Remove hose connection piece (fig. 5-3, item C) from safety
overflow (fig. 5-3, item B).
Fig. 5-3 Work step 1 Optional: Removing the connec-
tion piece from the safety overflow
2. Remove the cover plate
from the filling and
emptying fitting.
3. Remove the cover plate
fro
m the handle and
unscrew the threaded
piece (fig. 5-4, item E) from
the storage tank container.
E
Fig. 5-4 Working steps 2 + 3
4. Place a suitable collection trough beneath the filling and
emptying fitting.
CAUTION!
Storage water will gush out as soon as the sealing plug
is re
moved.
There is no valve and no non-return flap on the filling
and draining connection.

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