EXHAUSTO BESB Version 2 EC Motor Instruction Manual

3006652-2024-03.07.fm

BESB Version 2

EXHAUSTO A/S
Odensevej 76
DK-5550 Langeskov
Tel. +45 65 66 12 34
Fax +45 65 66 11 10
exhausto@exhausto.dk
www.exhausto.dk

Product information

EXHAUSTO BESB box ventilators are used in air supply and extraction systems.
The ventilator is not to be used to transport solid particles, nor in areas where there is a risk of explosive gases.
The ventilator must not be started with the service door open.

1.1 Main parts
Description
BESB is available in four different sizes, is completely insulated, and has a low-noise centrifugal fan with cast aluminium backward-bent blades (B-impeller):

• BESB250-4-1EC2
• BESB315-4-1EC2
• BESB400-4-1EC2
• BESB500-4-1EC2
• BESB500-4-3EC

The ventilator has an internal insulated housing and an external cabinet, both made of sheet aluminium.

Main components

Min. operating temperature: -12°C max. operating temperature +80°C
Ambient temperature when running: min. -30°C max. +40°C

1.2 Transport
The ventilator is delivered packaged and can be transported on a pallet. Once unpacked the ventilator should be handled carefully, especially the spigots etc. Deformation could result in internal damage to the moving parts.
If there is not a lot of space to move the ventilator, the service door can be dismounted as shown in section 1.1.

NB The ventilator must not be lifted using the service door handle.

Weight

1.3 Fitting
1.3.1 Fitting indoors

There are various ways of fitting the ventilator indoors.
With methods B and D the service door must be kept in the open position during service. A safety fitting for this purpose canbe supplied (including an assembly kit).
If the ventilator is to run intermittently, thereis a risk of condensation in the motor.
Therefore, use mounting method A or B only.

Service access
Wherever the ventilator is fitted, there should be space enough to be able to openthe service door to an angle of approx. 80°and to access the locking screws.

Warning
The motor must never be placed vertically under the cabinet and the motor and EC control must never be covered or they will overheat.

1.3.2 Fitting outdoors (OD)

OD type ventilators are designed for outdoor use and can be used for transport of air in the temperature range up to 200°C. This version is also fitted with a drain in installation method “A” A and B fitting methods should be used for outdoor fitting. Fitting methods C and D require a specially designed ventilator — contact EXHAUSTO.
All exterior seams, including spigots have been jointed to prevent water from getting inside.
The cabinet is class C4 DS/EN ISO12 944.2 certified and designed for outdoors.

Service access
Wherever the ventilator is fitted, there should be space enough to be able to open the service door to an angle of approx. 80° and to access the locking screws.

1.3.3 Fitting the mounting bars

• Mounting should be done on a stable vibration-resistant base, to minimise any vibration that might be caused by the ventilator. A cement slab placed on a wooden base construction is recommended.
• Fit the mounting bars on the cabinet with the supplied fitting screws. The cabinet has holes already bored for fitting method A.
• BESB400 and 500: When using fitting method B for BESB400 and 500, holes (Ø16 – Ø20) are bored in the cabinet for the fitting of the mounting bars.
• Fit the mounting bars while the ventilator is on the pallet.
• Sit the ventilator on the supporting base. Do not fasten the ventilator to the base.

1.4 Wiring
General
The wiring must only be done by a qualified electrician.

The fan and motor specifications are listedon the type-plates.
Max. fuse rating = 13 Amp.

Max. short circuit current is 10 kA
At start-up and during the initial adjustment of the fan, it is important to control the direction of rotation of the motor and to check the motor current does not exceed the manufacturer’s recommended operating current for the motor (to avoid damaging the motor).

Isolation switch
EXHAUSTO A/S would like to draw attention to the fact that, in accordance with the EU’s Machine Directive (appendix 1) all fan systems shall include a isolation switch.

The isolation switch must …

• be lockable or positioned in plain sight in the immediate vicinity of the fan
• be able to disconnect all poles from the supply voltage — contact distance of at least 3 mm in each pole
• Set up as isolation switch in accordance with standard IEC 60947-1 or IEC 60947-3.

The isolation switch is not supplied by EXHAUSTO.

Lightning conductor
Any lightning conductor connected to the fan must be in accordance with applicable regulations and legislation.

1.4.1 Ventilator with EC control
General Ventilators marked “EC” have a built-in EC control system.
Cables The wiring for control signal inputs must be completely insulated from the supply wirings.
NB Due to EMC requirements the cable between the EC control and the EC motor must not be elongated.

ESD
The electrician must be ESD protected when

• detaching the cover on the EC control
• working with the EC control

1.4.1.1 BESB250-4-1EC2, BESB315-4-1EC2, BESB400-4-1EC2 & BESB500-4-1EC2
Cabletype Cables for control signals must be with twisted pair conductors. As a minimum, the cable type must be CAT5e Ethernet cable.

Diagram

1.4.1.2 BESB500-4-3EC
Cable type C ables for control signals must be shielded.
Diagram

Key to diagram

Terminal|
---|---
OJ DV Control| EFC1P/EFC1P2 Panel| Signal description
1| | RS485 (+A)
2| | RS485 (-B)
3| | OV DC (chassis)
4| 5| +10V DC
5| 4| 0-10V DC
6| 3| OV DC (chassis)
7| | –
8| 2| Start/stop
9| | –
10| | OV DC (chassis)
11| | Run NC
12| | Run C
13| | Run NO
14| | Alarm NC
15| B| Alarm C
16| A| Alarm NO

Leakage current
The EC control produces a leakage current when running. The leakage current must be earthed, as there is a risk of the motor becoming live.
RCD protection of 300 mA is recommended, as leakage currents of more than 30 mA can occur.
To comply with EN50178, the fan must be suitably earthed.

Earth leak circuit breakers

If current earth leak circuit breakers are fitted in the installation, they must be of a type that meets the following requirements:

• PFI type B breaker according to EN 61008, that breaks the circuit when a vagrant current with DC content (pulsating DC) or smooth vagrant current is registered.
• The circuit breakers must be marked with the following symbols:

1.4.2 Troubleshooting DV-EC control
DV-EC-control

LED indicator

• The DV-EC control is equipped with a two-coloured green and red LED indicator of the different operating modes.
• The LED is located on the underside of the control unit next to the cable entry for the main voltage connection.

Troubleshooting chart

• Steady green when main voltage is connected.
• Flashes green when Modbus communication is active.
• Steady red for at least one critical alarm.
• Flashes red for at least one non-critical alarm.
  • LED error indicator:
  • 1 flash = Supply problem
  • 3 flashes = Internal DV problem
  • 5 flashes = motor problem

Accessory

• A handheld terminal for operation and alarm information can be purchased as an accessory.

1.5 Connecting to duct system

Flexible connections
The ventilator must always be connected to the duct system with FLF, to avoid any chance of vibrations being transmitted. The spigots on the ventilator are standard-sized and fitted with rubber seals.
To achieve maximum performance with minimal energy consumption the ventilator should be connected to the duct system with the specified lengths of duct before and after the ventilator. The FLF connections must always be fitted as shown.

Sound pressure level
The ventilator is fitted with sound dampers suited to the requirements of the operating area. The sound pressure for all types of BESB is less than 70 dB (A). The duct system is insulated against sound propagation, heat loss, fire and condensation.

No Duct
A protective net (accessory) with mesh size of 12 mm must be fitted if the ventilator is not fitted to a duct. It should be noted that:

• such fittings result in a pressure drop in the system
• Air volume measurements cannot be measured correctly when there is no duct fitted on the suction side

1.6 Airflow measurement
The box ventilators, aside from model BESB250, have measuring points for determining air flow. A manometer is connected to the test points and the air flow (qv) can be calculated by using the formula and diagrams.
Margin of error < ± 8% of actual air flow with the duct system on the suction side is as shown on the diagrams.
Calculations are based on the following conditions:
Temperature: 20°C
Density: 1.2 kg/m3
Pressure measurement, pm [Pa], at 20°C
1 m3/s = 1000 l/s = 3600 m3/h

1.7 Service and cleaning
EXHAUSTO provides a two-year factory warranty on the box ventilator, valid from invoice date. The motor in an EXHAUSTO box ventilator is fitted with special ball bearings that are lubricated and sealed, and maintenance-free. Any replacement of these bearings should be carried out by technicians from EXHAUSTO SERVICE or similarly qualified professionals.

The ventilator must be cleaned at least once a year. To clean the ventilator:

• Switch off the power supply to the ventilator using the isolation switch.
  Open the service door when the fan has stopped running.

• Wash the ventilator housing and the centrifugal impeller thoroughly with soap and water. The parts must be dry and the service door closed before the ventilator is restarted.

• The centrifugal impeller can be dismounted and cleaned. Measure the exact position of the impeller on the axle before removing it. The factory position of the impeller is shown on the cabinet behind the service door. If there are weights on the centrifugal impeller do not remove them.

• Check that cooling air can move freely through the motor cover.

1.8 Environmental declaration

Product description
EXHAUSTO BESB is a an easily serviced radial fan with backward curved blades. The fan is insulated against fire, noise and heat with 50 mm of mineral wool. The fan impeller is directly mounted on the motor shaft, thus reducing losses and wear and resulting in lower repair costs.
Servicing and cleaning are performed by opening the hinged door for access to all parts in contact with the air. The motor is mounted outside the airstream.
The fan is supplied with mounting rails with vibration dampers. The fan is CE approved and EMC tested in accordance with the applicable directives.

Materials used
Cabinet, fan housing and mounting rails are made of recycleable hot-dip galvanised steel sheet. Fan impellers are made of recycleable pressure-cast aluminium.
The insulation consists of mineral wool which can be recycled after dismantling the fan.
The gaskets consist of CFC and HCFC free cellular rubber.
The motor consists of aluminium, steel and copper, and in some cases a plastic cooling jacket. The packaging consists of corrugated cardboard and a wooden disposable pallet.

Materials in %

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