Viessmann H32E, Инструкция по установке и обслуживанию, Страница: 10 / 80

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For routing air between different floors, an iris dia-
phragm is installed in the riser. The zinc-plated steel
iris diaphragm adjusts the air flow rates.
Preventing flow noise and pressure drop
■ Install air distribution boxes close to the ventilation
unit.
Maximum length of supply air and extract air ducts
between the ventilation unit and the air distribution
box: 5 m
■ Symmetrical layout of the supply air and extract air
ducts
■ Short runs, few bends
■ In areas where greater attenuation is required, install
one silencer (accessories) each in the supply and
extract air ducts between the air distribution box and
ventilation unit.
■ In areas where greater attenuation is required, pro-
vide additional silencers between adjacent living
rooms, bedrooms and toilets.
■ To reduce the pressure drop in ducts, fit central ris-
ers/downpipes with EPP pipe DN 160 or DN 180
where appropriate.
Measures against structure-borne noise
The ventilation units have sound-absorbing adjustable
feet or rubber washers to counteract structure-borne
noise transmission. Therefore, if appliances are moun-
ted on concrete or screed floors and solid walls, no
additional measures need be taken.
When a unit is installed on wooden ceilings, we recom-
mend additionally insulating it against vibration by
means of a concrete slab or anti-vibration mounts. Never position the ventilation unit in the centre of a
ceiling if the ceiling is constructed with wooden beams.
Note
This also applies when using a mounting base (acces-
sories).
Silencers
Silencer, round, flexible
1100
a
b
Fig. 3
Dimensions, silencer, round: Packing density
50 mm
Connection
Dimensions in mm
a
b
DN 125 125 224
DN 160 160 250
DN 180 180 280
Dimensions, silencer, round: Packing density
25 mm
Connection
Dimensions in mm
a
b
DN 160 160 200
DN 180 180 224
Silencer, flat, impact-resistant version
175
500
360
175
49
52
20
20
Fig. 4
Preparing for installation
Air routing between floors
5831646
Installation