14
Preparing connections on the secondary side
■
Thoroughly flush the heating system.
■
Equip the heating system with an expansion vessel
(in accordance with EN 13831).
Note
–
The expansion vessel must be approved to
EN 13831.
–
Position the expansion vessel in such a way that it
is
always
connected to the Vitosorp. Even when
thermostatic valves are closed and irrespective of
the setting of the 3-way diverter valve.
–
The diverter valve is integrated in the return on the
Vitosorp.
■
With underfloor heating circuits, install a temperature
limiter to restrict the maximum temperature of under-
floor heating systems.
Preparing the condensate connection
Prepare the condensate hose and safety valve dis-
charge pipe for the on-site drain line or siphon:
See positions
G
and
H
The connection can be made to the rear into the wall,
to the left or to the right.
Preparing the flue gas connection
Prepare a coaxial 60/100 flue gas connection for the
system.
Preparing the gas connection
Prepare the gas connection according to TRGI or TRF
[or local regulations].
Preparing the electrical connections
■
Flexible power cable: 3 x 1.5 mm
2
, max. fuse rating
16 A, 230 V/50 Hz
■
For accessories:
Cables with the required number of cores for exter-
nal connections
Prepare an on-site distribution box.
■
All cables in area
F
should protrude 1400 mm from
the wall (see Fig. 2, page 12)
Danger
Incorrect core assignment can lead to serious
injury from electrical current and result in appli-
ance damage.
Never interchange cores "L" and "N".
Danger
Incorrectly executed electrical installations can
result in injuries from electrical current and dam-
age to the appliance.
Route LV leads < 42 V separately from cables
> 42 V/230 V~/400 V~.
Connect the power supply and implement all
safety measures (e.g. RCD circuit) in accord-
ance with the following regulations:
■
IEC 60364-4-41
■
VDE regulations
■
Technical connection requirements specified
by the local power supply utility
Isolators for non-earthed conductors
■
Install an isolator in the power cable to provide
omnipolar separation from the mains for all active
conductors, corresponding to overvoltage cate-
gory III (3 mm) for complete isolation. The isolator
must be fitted in the permanent electrical installation,
in line with installation requirements.
■
We additionally recommend installing an AC/DC-
sensitive RCD, type B
, for DC (fault) currents
that can occur with energy efficient equipment.
Preparing for installation
Installation preparations
(cont.)
5678 044 GB
Installation
Summary of Contents for D2RA
Page 113: ...113 Maintenance Checking the Vitotronic 200 H accessories cont 5678 044 GB Maintenance ...
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