Viessmann Vitoligno 300-H Installation And Service Instructions For Contractors page 39

Power supply
Regulations
Connect the power supply and implement all safety
measures (e.g. RCD circuit) in accordance with
IEC 60364-4-41, the connection requirements of your
local grid operator and VDE or national regulations.
Protect the power cable to the control unit with a
C 16 A 3-pole fuse.
Connecting the emergency stop mains isolator provided
Danger
Incorrect core assignment can result in serious
injury and damage to the appliance.
Ensure clockwise rotating field.
Install the emergency stop mains isolator as shown in
the connection diagram.
Recommended power cable
For the position of mains connection
ZPK 2.03 PCB in chapter "Connection and wiring dia-
gram".
Connection diagram
Fig. 28
Emergency stop mains isolator
A
ZPK 2.03 PCB
B
Neutral conductor, distribution terminal
C
Charging control panel (optional)
D
Fit the emergency stop mains isolator outside the
installation room.
Isolator
Install an isolator in the power cable to provide omnip-
olar separation from the mains for all active conduc-
tors, corresponding to overvoltage category III (3 mm)
for complete isolation. The isolator must be fitted in the
permanent electrical installation, in line with installation
requirements.
, see Note
sYÖ
Make earthing cable PE longer than the other connect-
ing cables to ensure it will not be pulled off under ten-
sion.
On-site fuse protection in accordance with the speci-
■
fication
■ Recommended power cable
5-core cable selected from the following options:
–
H05VV-F5G 2.5 mm
– H05RN-F5G 2.5 mm
1. Check that the power cable to the control unit is
protected with a max. fuse rating of C 16 A, 3-pole.
2. Connect the power cable in the junction box and
the control unit (on site).
Colour coding to IEC 60757:
BN
BU
GNYE Green/yellow
Installation sequence
2
2
Danger
Incorrect core assignment can result in seri-
ous injury and damage to the appliance.
Ensure clockwise rotating field.
Brown
Blue
39