Vents-us Quietline, User Manual

4

EN

FOLLOW THE USER’S MANUAL REQUIREMENTS TO ENSURE DURABLE AND 

TROUBLE-FREE OPERATION OF THE UNIT.

Disconnect the unit from power supply prior to any connection, servicing, maintenance, and repair 
operations. 

Only  qualified electricians with a work permit for electrical units up to 1000 V are allowed 

for installation and maintenance. The present user’s manual should be carefully read 

before beginning works.

•  Single-phase power mains must comply with the acting local electrical norms and standards.
•  Fixed electrical wiring must be equipped with an automatic circuit breaker.
•  The unit must be connected to power mains through a QF automatic circuit breaker integrated 

into the fixed wiring system.  The gap between the circuit breaker contacts on all poles must be 
not less than 3 mm. Check the unit for any visible damages of the impeller and the casing before 
starting installation. The casing internals must be free of any foreign objects that can damage the 
impeller blades.

•  While mounting the unit, avoid compression of the casing! Deformation of the casing may result 

in the motor jam and noisy operation. Misuse of the unit and any unauthorised modifications are 
not allowed.

•  Take steps to prevent ingress of smoke, carbon monoxide, and other combustion products into 

the room through open chimney flues or other fire-protection devices. Sufficient air supply must 
be provided for proper combustion and exhaust of gases through the chimney of fuel burning 
equipment to prevent back drafting. Transported air must not contain any dust or other solid