Daikin VAM-FA Technical Data Manual

Daikin VAM-FA Technical Data Manual Manual pdf 56 page image

• Heat reclaim ventilation • VAM-FA/FB113• Ventilation • Heat reclaim ventilation5413 Installation13 - 7 Duct Work13 - 7 - 1Caution• Do not install ducts as shown below.1. To prevent air leakage, wind aluminum tape round the sectionafter the duct connecting flange and the duct are connected.2. Install the opening of the indoor air intake as far as from theopening of the exhaust suction.3. Use the duct applicable to the model of unit used (Refer to theoutline drawing.)4. Install the two outdoor ducts with down slope (slope of 1 / 50 ormore) to prevent entry of rain water. Also, provide insulation forboth ducts to prevent dew formation. (Material: Glass wool of 25mm thick)5. If the level of temperature and humidity inside the ceiling is alwayshigh install a ventilation equipment inside the ceiling.6. Insulate the duct and the wall electrically when a metal duct is tobe penetrated through the metal lattice and wire lattice or metallining of a wooden structure wall.13 - 7 - 2Going through the external wall1. Hole diameterDuct dia. + 50 or 75(I.D. depends on the core drill specification)2. Drilling the holeIdeally it is better to grade in the same procedure as refrigerantpiping.In the case of a square ductGrade a wood frame of a duct stay.In the case of a round ductDrill a hole horizontally because the hole cannot be made with thetool graded.3. Preventing wind and rain from enteringMost of a space between the duct and the external wall isprotected by mortar. Coated wall is filled with a caulking material.(See fig. 1)Image picture4. 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 drawingcompany, so a detailed work is executed by the judgement of aninstallation company.Duct diameter Hole diameterφ 100 + 50 φ 150(1) Extreme bend (2) Multi bendDo not bend the duct over 90°C.(3) Reduce the diameter of the duct to be connected.Do not reduce the duct diameter halfway.(HC0077)(HC0078)(HC0079)BodyInsulator(Field supply)Slope: Over 1 / 50Duct connecting flangeAluminum tape(Field supply)φ 150 + 50 φ 200(HC0080)1001501 / 100 – 1 / 50(HC0081)Fig. 1OutdoorIndoorMortarExternalwallHoodCaulking material(Sealing material)Spiral ductSpiral duct(A flexible duct is not used in thethrough part of the external wall)