Electrical Connection - Viessmann VITODENS 222-F Series Technical Manual

Design information
When installing the Vitodens in wet rooms, observe the safety zones
and minimum wall clearances according to VDE 0100 [or local regu-
lations] (see also "Electrical safety zone").
8
Electrical safety zone
a
A r e
2

Electrical connection

The power supply must comply with the requirements of your local
power supply utility and current VDE [or local] regulations (a: ÖVE
regulations).
Protect the power cable with a fuse with a max. rating of 16 A.
We recommend installing an AC/DC-sensitive RCD (RCD class B)
for DC (fault) currents that can occur with energy efficient equip-
ment.
Make the power supply (230 V~, 50 Hz) via a permanent connection.
Flexible connecting cable included in standard delivery:
■ Vitodens 200-W and 222-W: Approx. 2 m long
■ Vitodens 222-F and 242-F: Approx. 1.5 m long
Recommended cables
NYM 3 G 1.5 mm 2
– Power cables (accessories)
– DHW circulation pump
Interlock switch
Install an interlock for open flue operation if an extractor (e.g. cooker
hood) is fitted in the room providing the combustion air supply.
The EM-EA1 extension (accessories) can be used for this. This
switches any extractors off when the burner is started.
Power supply for accessories
The power supply for accessories can be provided directly at the
control unit.
This connection is switched by the system ON/OFF switch.
If the total system current exceeds 6 A, connect one or more exten-
sions directly to the mains supply via an ON/OFF switch.
Where the boiler is sited in a wet room, the power supply connection
of accessories must not be made at the control unit.
Gas connection
Gas installations must only be carried out by a registered gas fitter
authorised by the relevant gas supply utility.
Connect and size the mains gas according to TRGI 2018 or TRF
1996 [or local regulations].
a Connect the mains gas according to ÖVGW-TR Gas (G1) and
the regionally applicable building regulations.
VIESMANN
96
(cont.)
6 0
0
A r e
a 1
A r e
a 0
Area 2
Electrical equipment in rooms containing a bathtub or a shower must
be installed in such a way that users cannot be exposed to danger-
ous body currents. VDE 0100 specifies that cables supplying perma-
nently installed consumers in zones 1 and 2 should only be run verti-
cally and routed into the equipment from the back.
It can be connected via an on-site junction box outside the appli-
ance.
The power supply for the accessories is connected at the terminals
in the appliance. The cables are inserted into the boiler through the
underside (Vitodens 200-W and 222-W) or the back (Vitodens 222-F
and 242-F).
The outside temperature sensor, cylinder temperature sensor
(Vitodens 200-W) and PlusBus to the accessories are connected to
an external plug:
■ Vitodens 200-W and 222-W: Plug on the underside
■ Vitodens 222-F and 242-F: Plug on the left of the frame; can be
changed to the right
2-core min. 0.75 mm 2
– EM-EA1, EM-P1, EM-S1 (PlusBus) extension
– Outside temperature sensor
– Extension kit for heating circuit with mixer (PlusBus)
– Vitotrol 200-E (PlusBus)
Additional requirements when siting boilers operated with LPG
in rooms below ground level
According to TRF 1996 Vol. 2 – valid as of 1 September 1997 – an
external safety solenoid valve is no longer required when installing
the Vitodens below ground level.
However, the high safety standard derived from the use of an exter-
nal safety solenoid valve has proved to be valuable. We therefore
recommend the continued installation of an external safety solenoid
valve when installing the Vitodens in rooms below ground level. The
EM-EA1 extension (accessories) is required for this.
Max. test pressure 150 mbar (15 kPa).
We recommend installing a gas filter to DIN 3386 in the gas line.
VITODENS