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Installation guide
Installation guide
2-5. Precaution with Duct type
2-5. Precaution with Duct type
1) The suction side should have at least the same cross sectional area as the
1) The suction side should have at least the same cross sectional area as the
discharge side. (1.2
discharge side. (1.2 times or higher
times or higher recommend
recommended)
ed)
2) Diffuser suction/discharge wind speed(->wind veloc
2) Diffuser suction/discharge wind speed(->wind velocity) :
ity) : 3 m/s or
3 m/s or less
less
3) Duct’s curvature radius should be greater than the circular duct diameter
3) Duct’s curvature radius should be greater than the circular duct diameter
→
→
wind(-> airflow rate), noises
wind(-> airflow rate), noises problems
problems
4) Design and construction pursuant to
4) Design and construction pursuant to the duct design
the duct design pressure standard
pressure standard
5) Use
5) Use of a
of a suction/disch
suction/discharge chamber containing soundproofing materials
arge chamber containing soundproofing materials
→
→
To minimize the air flow noise, attach a suction/discharge chamber with built-in soundproofing
To minimize the air flow noise, attach a suction/discharge chamber with built-in soundproofing
materials.
materials.
6) When the duct suction hole is located on the ceiling, consider the performance
6) When the duct suction hole is located on the ceiling, consider the performance
and noise levels.
and noise levels.
→
→
Foreign substances can clog the
Foreign substances can clog the filter.
filter.
7) Obey the standard for fixing a duct
7) Obey the standard for fixing a duct
..
- Spiral 2.5m (0.5t), Flexible Duct fi
- Spiral 2.5m (0.5t), Flexible Duct fixed within 1.0m.
xed within 1.0m.
- To prevent damage to flexible duct by the hanger band, insert a saddle or use a flexible duct
- To prevent damage to flexible duct by the hanger band, insert a saddle or use a flexible duct
hanger (band).
hanger (band).
8) Obey the duct insulation handling rules.
8) Obey the duct insulation handling rules.
- Air supply (SA) duct should be i
- Air supply (SA) duct should be insulated.
nsulated.
- Suction unit (RA) duct should be insula
- Suction unit (RA) duct should be insulated according to the on-site condition.
ted according to the on-site condition.
9) Duct’s suction (diffuser/product) should have a filter attached to it.
9) Duct’s suction (diffuser/product) should have a filter attached to it.
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