9
Installation example WDV-A series
Flat roof base
(bottom closed for cutting
the suction opening) - accessories
AIR CURRENT
AIR CURRENT
with snap frame
with snap frame
Inclined roof base adjustable
20-35º
(bottom closed for cutting
the suction opening) - accessories
automatic closing flap (accessories)
Important
There is a risk of damage to the bearings or fan parts.
•
A duct bend must not be placed directly before or after
the fan
•
A uniform and constant air flow to the unit must be
ensured. Free exhaust air must be ensured.
Rectangular duct system: D = Hydraulic diameter
Round duct system: D = nominal diameter
9.1. Assembly/disassembly of impeller - internal rotor motor WDV-A series
Important
Damage to the motor and impeller.
The ball bearings of the motor and the balanced impeller can be damaged by violent impacts.
•
Attach the impeller and/or shaft extensions to the shaft or rotor without forcing.
•
The impeller and the hub must not be separated. These were balanced by Walpol as one unit.