Inline centrifugal fan VENTS VKM 250 EC Q

Description
Characteristics
Capacity diagram
Downloads
Dimensions
Additional characteristics
Designation key

Description

APPLICATION
Supply and exhaust ventilation and air conditioning systems for various premises requiring cost-effective solution and controllable ventilation. EC motors applied in VKM fans reduce energy demand by about 35 % and ensure high aerodynamic performance and low noise level. Such characteristics are of special importance for ventilation of public premises as banks, supermarkets, restaurants, hotels, installation close to residential buildings and for domestic application, e.g. ventilation of private pools.	EC motors enable integration of several fans into a unified networks and their centralized control. The steel casing ensures reliable operation of the fan in case of its outside installation. The fans are designed for connection to Ø 100, 125, 150, 160, 200, 250, 315, 355 and 400 mm air ducts.
DESIGN
The fan casing is made of polymer coated steel.	New technologies for manufacture of the fan components let attain the total casing air tightness.
MOTOR
The impellers with backward curved blades are powered with a high efficient electronically commutated (EC) direct current motor with external rotor. As of today, such motor type is the most advanced solution for energy saving. EC motors are featured by high performance and the best speed controllable range. Premium efficiency reaching up to 90 % is the absolute advantage of electronically commutated motors.	The motors are equipped with ball bearings for longer service life of the fan (40 000 hours). For precise features, safe operation and low noise, each turbine is dynamically balanced while assembly. Motor ingress protection rating IP44.
SPEED CONTROL
The fan is controlled with the external control signal 0-10 V (air flow control as a function of temperature, pressure, smoke conditions and other parameters). Should the control value get changed, the EC motor adjusts its speed and the fan boosts as much air flow to the ventilation system as required. Maximum speed of the fan does not depend on the current frequency and it can operate at 50 or 60 Hz mains supply.	The fans may be integrated into the unified dispatch system. The respective software enables to control all the fan integrated into the system. The computer displays all the system parameters. Each fan in the system may be individually adjusted.
MOUNTING
The fans may be installed at any angle. The fixing brackets that are included into the delivery set are used to facilitate the fan mounting to the wall.	The fan is connected to power mains through the external terminal box.

Characteristics

Parameter	VKM 250 EC Q	Measurement unit
Low-powered motor	yes	-
High-power version	no	-
Phase	1	˜
Voltage	230	V
Frequency	50/60	Hz
Sound pressure level at 3 m distance	44	dBА
Air capacity	985	m³/h
Power consumption	100	W
Current	0.74	A
EC motor	yes	-
RPM	2500	min^-1
Max. transported air temperature	-25 +60	°С
Protection rating	IP X4	-
Design	centrifugal	-
Weight	5.1	kg
Duct diameter	250	mm
Casing material	polymer coated steel	-
Outdoor mounting	yes	-
SEC Class	B	-
Duct	for round air ducts	-
Type	supply and exhaust	-
Mounting	outdoor mounting, Inline	-

Capacity diagram

Selection method:
Air flow:
Pressure:

Operating point

Air flow: --
Pressure: ---

Files archieve

Downloads

Dimensions

Characteristics

Parameter	Value	Measurement unit
∅D	248	mm
ØD1	345	mm
B	395	mm
B1	355	mm
H	435	mm
L	250	mm
L1	25	mm
L2	30	mm
L3	40	mm

Additional characteristics

Sound-power level, A - weighted		Octave-frequency band [Hz]									LpA, 3 m [dBА]	LpA, 1 m [dBА]
	Hz	Gen.	63	125	250	500	1000	2000	4000	8000	LpA, 3 m [dBА]	LpA, 1 m [dBА]
L_wA to inlet	dBА	88	60	76	83	81	83	79	85	63	68	78
L_wA to outlet	dBА	87	63	75	72	81	82	81	76	62	67	77
L_wA to environment	dBА	65	28	46	55	58	61	57	49	36	44	54

Designation key

Series	Air duct diameter [mm]	Motor	Options
VENTS VKM VENTS VKMS: high-power version	100; 125; 150; 160; 200; 250; 315; 355; 400	ЕС: electronically commutated synchronous motor	Un: speed controller with an electronic thermostat and a temperature sensor fixed on a 4-meter cable. Temperature-based operation logic. U2n: speed controller with an electronic thermostat and a temperature sensor fixed on a 4-meter cable. Temperature-based switching on/off. R1: power cord with a mains plug. P: integrated smooth speed controller.