Specifications For The Ducting - GIRBAU ED460 Installation Instructions Manual

5.5.1. Specifications for the ducting

See the Wiring diagram (Chapter 4.6) for the corresponding model for flow, diameter and position of
connection. Identified in this manual as EV.
 It should be as short as possible, and the section specified in Exhaust ducting. Technical and connection
details (Section 4.8) must be maintained throughout the whole ducting. If the maximum pressure of the
exhaust duct exceeds the value indicated in the table in Section 4.8, it may require a wider diameter duct.
Section 9.1 sets out the procedure for controlling the exhaust duct pressure.
 It must be fire-resistant, rigid, anti-corrosive with a smooth inside surface and these properties must remain
unaltered at a minimum of 150 ºC (302 ºF).
 The duct is not to be assembled with screws or other fastening means that extend into the duct and catch
lint.
 It must be airtight all around and thermally insulated up to a height from the floor of at least 2.7 metres (107
in).
 Only rigid or flexible metal duct should be used for exhausting. Plastic ducting is not to be used.
 If flexible metal ducting is used, its length shall not exceed 2.4 m.
 If the extraction produces a significant noise, it is advisable to fit soundproofing.
 It shall have the minimum number of bends. To avoid losing contents, the angle of the bends shall not be
more than 45º.
 It must always be conducted in an upwards direction. An upwards gradient of at least 3% and the shortest
length possible.
 The outlet shall be clear and separate, and shall never be joined to any other duct.
 When passing through walls or roofs made of wood or other combustible materials, the diameter of the
cavity has to be 100 mm (4 in) greater than the ducting. In these cases the ducting must be protected by fire
resistant material.
 To aid in analysing combustion products and exhaust duct pressure, two measurement points must be
provided that can be closed during normal operation (see Figure 9.1).
Height of these openings: 1 m (40 in) from the floor.
Opening for inserting the flue gas analyser sensor: Approximate diameter 10/12 mm (0.5 in).
Pressure control opening: Approximate diameter: 3.5 mm (0.14 in).
 In ducting longer than 10 m (400 in) or if there is a lot of water from condensation, install a 1/2"(12,7 mm) o
3/4"(19,05 mm) drain at the lowest point, to drain the water. In cold temperatures, insulate the ducting to
reduce condensation.
 It is advisable to follow the instructions set forth in the local regulations currently in force regarding the
exhaust duct outlet.
Assembling the exhaust ducting
Once the dryer is situated in its final position and levelled, secure the exhaust duct to the outlet on the dryer.
DANGER!
To prevent accidental contact with the dryer fan through the extraction output, the
extraction pipe joint must be fitted using a device that is secure and requires a tool for its
disconnection.
See the Technical and Connection details for the machine in Chapter 4.
Connecting the machine
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Code No. 549758
Rev. nº 10/0418