Vents VKV EC, User Manual

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7 www.ventilation-system.com
Depending on the model the fan casing is made of polymer coated steel, aluminium or galvanized steel. The units feature electronically
commutated (EC) direct current motors with an external rotor and centrifugal impellers with backward curved blades. EC motor is
free of friction and wear parts such as a commutator and brushes. These components are replaced by a maintenance-free electronic
circuit board.
DESIGN AND OPERATING PRINCIPLE
• Fans are designed for horizontal mounting on a flat roof directly above an air duct or a ventilation shaft.
• In order to avoid ingress of water and snow into the ventilation duct, it is possible to install a fan on the mounting frame.
• The fan is connected to the ventilation duct by means of a counter flange, which is attached directly to the fan base.
• The fan base has holes for fixing bolts that attach the fan to a stationary even surface or to a mounting frame.
• In the VKV 225 EC, VKV/VKH 500 EC, VKV/VKH 630 EC models the counter flange is attached together with the fan inlet ring.
• A mounting frame, a counter flange and mounting bolts are not included in the delivery set and must be purchased separately.
VKH EC
VKV EC
MOUNTING AND SET-UP
WHILE INSTALLING THE UNIT ENSURE CONVENIENT ACCESS FOR SUBSEQUENT
MAINTENANCE AND REPAIR.
BEFORE MOUNTING MAKE SURE THE CASING DOES NOT CONTAIN ANY FOREIGN
OBJECTS (E.G. FOIL, PAPER).