Viessmann VITOLADENS 300-W Technical Manual page 41

Design information
(cont.)
Allow cables/leads in the shaded area (see drawing) to protrude from
the wall as follows:
■ Vitoladens 300-W: 800 mm
■ Vitoladens 333-F: 2000 mm
A
B
100 215
Vitoladens 300-W
A Reference point Vitoladens top edge
B Area for power supply cables
140
50
Vitoladens 333-F
VITOLADENS 300-W/VITOLADENS 333-F
Recommended cables
NYM 3 G 1.5 mm 2 2-core min. 0.75 mm
– Power cables (also for acces- – Extension AM1 or EA1
sories) – Outside temperature sensor
– DHW circulation pump – Vitotronic 200-H (LON)
– Extension kit for heating circuit
– Vitotrol 200A
– Vitotrol 300A
– Vitohome 300
– Radio clock receiver
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.
For this, the external extension H3 (accessory) can be used. This
switches the extractors OFF when the burner is started. The connec-
tion extension must not be installed in a safety zone 1 or 2.
Power supply of accessories
The power supply of accessories can be connected directly to 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 via a mains isolator directly to the mains supply.
2
with mixer (KM BUS)
VIESMANN
41
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