Centrifugal roof fan BLAUBERG Tower-AL 250

Description

USE	SPEED CONTROL
Extract ventilation systems installed in various premises.Roof mounting.For any types of roofs or vertical ventilation shafts.	Smooth speed control with an external thyristor controller or step speed control with an external auto transformer (both available upon separate order).
DESIGN	MOUNTING
Steel casing with a special polymer atmospheric resistant coating.Aluminium impeller.Horizontal air exhaust.The fan is equipped with a terminal block for connection to power mains.The fan is rated for continuous operation.A connecting plate with an intake opening is designed to facilitate mounting to the roof surface.	Roof mounting directly above a ventilation shaft or air duct.The fan is connected to the air duct with the intake flange that is fixed to the fan base.The fan base has holes for fixing bolts that attach the fan to a stable level surface or a roof frame.Roof frame and intake flange available on separate order.Power is supplied through an external terminal box.
MOTOR
Single-phase asynchronous external rotor motor with axial impeller.Equipped with ball bearings for longer service life.Overheating protection by built-in thermal switches with automatic restart.

Characteristics

Parameter	Tower-AL 250 (50 Hz)	Tower-AL 250 (60 Hz)	Measurement unit
Voltage	230	230	V
Phase	1	1	˜
Frequency	50	60	Hz
Current	0.48	0.51	A
Power	68	76	W
RPM	1300	1450	min^-1
Maximum air flow	297	292	l/s
Maximum air flow	1070	1050	m³/h
Sound pressure level at 3 m	48	48	dBА
Max. operating temperature	40	40	°С
Motor IP rating	IP44	IP44	-
Ingress protection rating	IP24	IP24	-
EC motor	no	no	-
Casing material	polymer-coated steel	polymer-coated steel	-
Outdoor mounting	yes	yes	-
Sound-insulated casing	no	no	-
Air duct	for round air ducts	for round air ducts	-
Design	axial	axial	-
Type	Exhaust	Exhaust	-
Weight	7.2	7.2	kg
Mounting	for roof	for roof	-