30
INSTALLATION OF THE HORIZONTAL AIR/FLUE DUCT
☞
Observe the maximum flue
lengths as detailed in table on
page 27
70
1103
70
15
Horizontal air/flue duct
Vaillant Accy No.: 303 209
Contents of the accessory:
• Horizontal air/flue duct
• 87° elbow
• 2 x 70 mm air duct clamps
• 2 x internal trim rings Ø 125
☞
See page 24 et seq. for details of
air/flue duct elements.
Fig. 4.1: Horizontal air/flue conduit
GU_LAZ 82/0
Important:
The flue hole should be cut with a
slight rise to outside of 3° ± 1°
(equivalent to 50 mm ± 20 mm rise
per metre length).
Fig. 4.2: Example of installation with horizontal air/flue duct and
inspection-access T-piece