6
x
Taking out of operation
FA ROTEX HPSU monobloc compact • 09/2017
39
6
Taking out of operation
6.1
Temporary shutdown
If the ROTEX HPSU monobloc compact is not needed for a long
time, it can be temporarily decommissioned.
However, ROTEX recommends not disconnecting the system
from the power supply but merely switching it to "Stand-by mode"
(see controller operating instructions).
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 drain the ROTEX HPSU monobloc compact on
the water side, or
–
suitable antifreeze measures must be applied to the con-
nected heating system and hot water storage tank (e.g. drain-
ing).
6.1.1 Draining the storage tank
Ɣ
Disconnect the ROTEX HPSU monobloc compact from the
power supply.
Ɣ
Connect a drain hose to the
KFE filling connection
(accessory KFE BA,
16 52 15)
(fig. 6-1, item A) and lay
to a drainage point at least at ground level.
Tab. 6-1 Legend for fig. 6-1 to fig. 6-6
Without
solar
system
Ɣ
Insert the
KFE filling connection
in the threaded piece
(fig. 6-3, item E) and secure with the clamping piece (fig. 6-3,
item D).
Ɣ
Place a suitable collecting tray under the filling and draining
connection.
WARNING!
When opening the solar return connection and
the heating and hot water connections, there is
a
danger of scalding and overflooding
from
escaping hot water.
Ɣ
Only empty storage tanks or the heating
system
– if they have cooled for a sufficient period of
time
– with a suitable fixture for safely draining or
collecting the escaping water
– with suitable protective clothing.
CAUTION!
A heating system which is shut down can freeze
in the event of frost and may suffer damage.
Ɣ
Drain the water out of the shutdown heating
system if there is a danger of frost.
Ɣ
If the heating system is not drained, the
power supply must be ensured and the
external main switch must remain switched
on if there is a danger of frost.
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 ROTEX HPSU mono-
bloc compact does not have to be drained on the water
side, provided that the storage tank temperature is monitored
regularly and does not fall below +3 °C.
However, there is no frost protection for the connected heat dis-
tribution system through this.
If no
KFE filling connection
is available, the con-
necting piece (fig. 6-1, item C) can be detached
from the safety overflow (fig. 6-1, item B) and used.
This must be re-installed after the draining process before
the heating system is put back in operation.
Fig. 6-1
Installing the draining
hose
Optional: Detaching the connect-
ing piece from the safety overflow
A
KFE filling connection
(accessory KFE BA,
16 52 15)
B
Safety overflow
C
Hose connecting piece for
safety overflow
D
Clamping piece
E
Threaded piece
F
Sealing plug
G
Connection bracket
X
Valve insert
Ɣ
Remove the cover panel
on the filling and draining
connection.
Ɣ
When using the KFE
filling connection
(accessory KFE BA,
16 52 15):
Remove the cover panel
on the handle and
unscrew the threaded
piece (fig. 6-2, item E)
from the storage tank.
Fig. 6-2
Unscrewing the
threaded piece
E