Daikin VAM-FA8VE Technical Data Manual page 183

7 Product Specification
7 - 1 VKM-GAMV1
7 - 1 - 7 Reducing Operating Sound
7 - 1 - 7 - 5 General Comparison of the Effect ((1) → (6) in more Effective Order)
Mounting a silencer + flexible duct 2 m long
(1)
Mounting a silencer + flexible duct 6 m long
Main body
Silencer
Flexible duct 2 m
Spiral duct 4 m
Effect of a remedy for noise does not change
even for over 2 m long duct
Mounting a flexible duct
(4)
2 m long to an air suction
discharge grille
Main body
Spiral duct 4 m
Flexible duct 2 m
Note :
Measure the noise at 1.5 m below the air supply grille. Operating
noise conforms to JIS standard and the value is converted in
terms of the anechoic chamber.
7 - 1 - 7 - 6 Nameplate for Note
"Notes for duct work" is written on the HRV units as indicated below.
•
When using this unit in a quiet place, take a remedy for sound by connecting an optional flexible duct at the outlet of the indoor air suction
side of the main body.
• HRV • VKM-GAMV1
Main body
Silencer
Flexible duct 6 m
(5) Mounting a silencer
Main body
Silencer
Spiral duct 6 m
• HRV • Heat Reclaim Ventilation
(2) Mounting a flexible duct
6 m long
Main body
Flexible duct 6 m
(6) Spiral duct 6 m
No measures taken
Main body
Spiral duct 6 m
Suction /
discharge grille
² When connecting a spiral duct or an aluminum bellows, sound at
the air discharge outlet is higher by 8~11 phon than the main
body operating sound.
Mounting a flexible duct
(3)
2 m long to the main body
Main body
Flexible duct 2 m
Spiral duct 4 m
(2) (3) (4) (5) (6)
(1)
(dB)
+ 10
+ 5
Catalog
value
– 5
(HC0061)
2
7
181