Viessmann VITOCAL 151-A Installation And Service Instructions Manual page 33

Positioning the indoor unit
Dynamic IP addressing (DHCP, delivered condition)
■
in the network (WiFi):
Have this checked on site by an IT expert prior to
commissioning. Arrange for set up if required.
■ Set routing and security parameters in the IP net-
work (LAN).
Enable the following ports for direct outgoing con-
nections:
– Port 80
– Port 123
– Port 443
– Port 8883
Have this checked on site by an IT expert prior to
commissioning. Set up enabling if required.
Wireless signal range of WiFi connection
The range of wireless signals may be reduced by
walls, ceilings and interior fixtures. These weaken the
wireless signal, causing poor reception due to the fol-
lowing circumstances.
■ On their way between transmitter and receiver, wire-
less signals are damped, e.g. by air or when pene-
trating walls.
■ Wireless signals are reflected by metallic objects,
e.g. reinforcements embedded in walls, metal foil of
thermal insulation and thermal glazing with metal-
lised thermal vapour deposit.
■ Wireless signals are isolated by service ducts and
lift shafts.
■ Wireless signals are disrupted by devices that also
operate with high frequency signals. Maintain a dis-
tance of at least 2 m from these devices:
Computers
–
– Audio and video systems
– Devices with active WiFi connection
– Electronic transformers
– Pre-ballasts
Install the heat generator as close as possible to the
WiFi router to ensure a good WiFi connection. The sig-
nal strength can be displayed on the programming
unit: See operating instructions.
Note
The WiFi signal strength can be increased with com-
mercially available WiFi repeaters.
Angle of penetration
The reception quality remains best if radio signals hit
the walls vertically.
(cont.)
Depending on the angle of penetration, the effective
wall thickness changes and so does the extent to
which the electromagnetic waves are damped.
Flat (unfavourable) angle of penetration
Fig. 20
A
B
C
Ideal angle of penetration
C
Fig. 21
A
B
C
C
B
WiFi router
Heat generator
Wall
A
B
WiFi router
Heat generator
Wall
Installation sequence
A
33