Outdoor units, Vitocal 222-A
Vitocal 222-A
Type
Cable
Max. cable length
230 V appliances
– AWOT-M-E
– AWOT-M-E-AC
221.A04
3 x 2.5 mm
2
29 m
221.A06
3 x 2.5 mm
2
29 m
221.A08
3 x 2.5 mm
2
29 m
221.A10
3 x 2.5 mm
2
20 m
or
3 x 4.0 mm
2
32 m
221.A13
3 x 2.5 mm
2
20 m
or
3 x 4.0 mm
2
32 m
221.A16
3 x 2.5 mm
2
20 m
or
3 x 4.0 mm
2
32 m
400 V appliances
– AWOT-E
– AWOT-E-AC
221.A10
5 x 2.5 mm
2
30 m
221.A13
5 x 2.5 mm
2
30 m
221.A16
5 x 2.5 mm
2
30 m
7.6 Noise generation
Principles
Sound power level L
W
This describes the entire sound emissions in all directions emanating
from the heat pump. It does
not
depend on the surrounding condi-
tions (reflections) and is a value that can be used for direct compari-
sons of sound sources (heat pumps).
Sound pressure level L
P
The sound pressure level is a measure to assist orientation regard-
ing the volume of noise perceived by the ear at a specific location.
The sound pressure level is substantially influenced by the distance
and ambient conditions. The sound pressure level is thus dependent
on the measuring location, which is often at a distance of 1 m.
Standard measuring microphones measure the sound pressure
directly.
The sound pressure level is the variable that is used to assess
immissions from individual systems.
Sound reflection and sound pressure level (directivity Q)
The sound pressure level increases exponentially with the number of
adjacent, vertical, fully reflective surfaces (e.g. walls) compared to
installation in a free field (Q = directivity), as sound projection is
restricted compared to installation in a free field.
Q = 2
Q = 4
Q = 8
Q Directivity
Q=2: Freestanding outdoor unit at a large distance from the
building
Q=2
Q=4: Outdoor unit close to a house wall
Q=4
Design information
(cont.)
VITOCAL
VIESMANN
111
5831388
7
