Instruction manual

Option 1 - Figure 12a. Air Inlet Attachments Unitary Herringbone Burners (VSO)

A 127mm (5ins) Twin Wall Flue System

B Fan Adaptor 7177-SUB

C Fan 2501/2507 or 2560

D Optional Ducted Air Intake. VSI-DA

E Air Intake (supplied as standard)

Ventilation requirements are as detailed in

section 1.9

Ducted air must be used in locations

where there is airborne dust or where

there is a polluted atmosphere e.g. Chlorinated

Vapours.

Maximum length = 9m

Minimum diameter = 100mm

Maximum no of bends = 2

Maximum flue length = 9.5m @ Ø125mm

Maximum no of bends = 2

All flues must terminate vertically.

For further information on flue runs, please refer

to BS 5440 pt.1 2000

For non-flued installations, delete items A and

B and rotate fan outlet to the HORIZONTAL

position away from the burner.

Products of Combustion

Products of combustion Firing tube

Ducted Air Intake