Daikin VAM-FA8VE, Technical Data Manual

Page: 145 / 282

• HRV • Heat Reclaim Ventilation
143
• HRV • VAM-FA8VE
1
10
10 Installation
10-6 Duct Work
10-6-1 Caution
• Do not install ducts as shown below.
1. To prevent air leakage, wind aluminum tape round the section
after the duct connecting flange and the duct are connected.
11. Install the opening of the indoor air intake as far as from the
opening of the exhaust suction.
12. Use the duct applicable to the model of unit used (Refer to the
outline drawing.)
13. Install the two outdoor ducts with down slope (slope of 1 /
50 or more) to prevent entry of rain water. Also, provide
insulation for both ducts to prevent dew formation. (Material:
Glass wool of 25 mm thick)
14. If the level of temperature and humidity inside the ceiling is
always high install a ventilation equipment inside the ceiling.
15. Insulate the duct and the wall electrically when a metal duct is
to be penetrated through the metal lattice and wire lattice or
metal lining of a wooden structure wall.
10-6-2 Going through the external wall
1. Hole diameter
Duct dia. + 50 or 75
(I.D. depends on the core drill specification)
<e.g.>
2. Drilling the hole
Ideally it is better to grade in the same procedure as refrigerant
piping.
In the case of a square duct
Grade a wood frame of a duct stay.
In the case of a round duct
Drill a hole horizontally because the hole cannot be made with
the tool graded.
3. Preventing wind and rain from entering
Most of a space between the duct and the external wall is
protected by mortar. Coated wall is filled with a caulking
material. (See fig. 1)
Image picture
4. How about the building which has already been built?
Same as the newly-built building.
• Only hole diameter 100 is instructed in a drawing by a
drawing company, so a detailed work is executed by the
judgement of an installation company.
(1) Extreme bend (2) Multi bend
Do not bent the duct over 90 .
(3) Reduce the diameter of the duct to be connected.
Do not reduce the duct diameter halfway.
(HC0077)
(HC0078)
(HC0079)
Body
Insulator
(Field supply)
Slope: Over 1 / 50
Duct connecting flange
Aluminum tape
(Field supply)
Duct diameter Hole diameter
φ
100 + 50
φ
150
φ
150 + 50
φ
200
(HC0080)
φ
100
φ
150
1 / 100 – 1 / 50
(HC0081)
Fig. 1
Outdoor Indoor
Mortar
External
wall
Hood
Caulking material
(Sealing material)
Spiral duct
Spiral duct
(A flexible duct is not used in the
through part of the external wall)