Daikin VAM-FA8VE Technical Data Manual page 201

7 Product Specification
7 - 2 VKM-GAV1
7 - 2 - 7 - 2 Reducing Operating Sound Heard from the Air Discharge Outlet (Suction Inlet)
1. Use the following recommended optional accessories to reduce
operating sound heard from attic-installed duct type models.
(Fig.3)
Fig. 3
(1)Sound-eliminating box (Silencer)
(2)Flexible duct
(3)Sound-eliminating air suction / discharge grille
2. If the above accessories do not give satisfactory effect or when
an attic-installed cassette type model is used, take the following
measure.
Fig. 4
(1)
(1)Apply a sound-absorbing material to the interior of the room.
7 - 2 - 7 - 3 Effect of Remedy for Sound
Caution
1. Be sure to connect a flexible duct (2 m) to an outlet of the main
body in the indoor air supply side.
* A silencer is effective especially when using the flexible duct at the same time.
• HRV • VKM-GAV1
(1) (2) (3)
(HC0058)
(HC0059)
• HRV • Heat Reclaim Ventilation
3. To reduce the air flow sound heard from the air discharge outlet
(suction inlet) of an attic-installed duct type model, use a small
diameter flexible duct, which excels in sound absorptivity, for
greater sound reduction effect.
(1)Branched duct (for letting air flow through two ducts to slow
down its speed before it reaches the air discharge outlets
(sunction inlets))
Fig. 5
(2)Flexible duct
4. Installation of the unit with the source of its operating sound
located at a corner of a room will be a partially effective sound
reduction measure; it will keep persons in the center of the room
free from the annoying operating sound, with those in the corner
of the room kept annoyed by the operating sound. To avoid this,
try to find the best installation place from which the operating
sound is least heard by everyone in the room.
2. Do not connect a spiral duct and an alminium bellows directly to
the outlet of the main body.
(2)
(1)
(HC0060)
2
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