FläktGroup EULK Fan Installation guide

Brand: FläktGroup

Model: EULK Fan

Type: Installation guide

Fläkt Woods 3227 GB 2008.04 1 Specifications are subject to alteration without notice

EU Air Handling Unit INSTALLATION

Fan EULK, c = 2, 4

Installation alternatives

Connection of outlet duct

Connection of the duct to the outlet from the fan unit

must take place in accordance with one of the examples

in Fig. 2.

Important!

The unit must not be allowed to support the weight of

the duct.

Fig. 2a Fig. 2b Fig. 2c

The duct may be connected in accordance with the fol-

lowing alternatives:

A.Via a transition piece fixed to the casing with self-tap-

ping screws. The duct connection is then made with a

PG joint or a flanged union. Fig. 2a.

B.Via a flexible sleeve coupling fixed to the casing with

self-tapping screws. The duct connection is then made

with a PG joint or a flanged union. Fig. 2b.

C.Via a direct edge-mounted duct provided with sheet

metal angles at the corners. Fig. 2c.

Transition piece Flexible sleeve Counterflange Duct

EULZ-62 coupling EULZ-63

EULZ-61

Electrical connection

The fan motor must always be controlled by a frequency

converter, which permits the possibility of regulation and

soft starting.

N.B. The fan must not be started directly.

From the rating plate, determine the MAXIMUM fre-

quency to which the fan motor may be regulated. Under

no circumstances must the fan motor be supplied at a

higher frequency.

xxx xxxx xxxxxx xxx

xxxx xxxxxxxx xx

xxx xxxx xxxxx

MAX frequency

Electrical connection must be performed by a quali-

fied electrician.

The cable between the terminal box of the motor and the

frequency changer must be screened. A safety cut-out

switch must be installed between the electricity mains

supply and the frequency changer.

The safety cut-out switch is fitted close to the fan inspec-

tion door.

Before working on the fan, the fan must be switched

off with the safety cut-out switch.

Fig. 1

Protective net EULZ-64

Counterflange EULZ-63

Flexible sleeve coupling

EULZ-61

Transition piece

EULZ-62

Connection accessories

for outlet:

Internal contact protection,

outlet EULZ-36

Door lock EULZ-14

Internal contact

protection, inlet

EULZ-37

Fig. 3

Protective net for door

EULZ-38

Fan EULK, c = 2, 4

Fläkt Woods 3227 GB 2008.04 2 Specifications are subject to alteration without notice

EU Air Handling Unit INSTALLATION

Electrical connection, continued.

Drill a hole for the cable conduit entry into the unit casing

at a suitable point in the fixed panel. Fig. 4 and Fig. 5.

The cable must not be routed through the inspection

door. The screwed fitting for the cable can be executed as

shown in Fig. 6.

Fig. 4

Fig. 5 Fig. 6

EULK can be supplied with an external, factory-installed

frequency converter connected to the terminal box of the

motor with a screened cable; accessory STRZ-54. A safety

isolator with cabling to the frequency converter is also

available as an accessory; STRZ-65.

NOTE. STRZ-65 can only be ordered as a complete

assembly with STRZ-54.

EULK can also be supplied with a factory-installed

screened cable for an external screened terminal box; acces-

sory STRZ-66.

= Fixed panel

Testing before commissioning

– Check for compliance with the EU Machinery

Directive in respect of contact protection. Wherever

the fan unit is accessible from a duct or other function-

al component, the fan unit must be fitted with contact

protection EULZ-36 and/or EULZ-37. Alternatively,

functional components before and after the fan, having

an inspection door, may be fitted with door lock

EUAZ-14. Door protective net EULZ-38 or door lock

can be used as contact protection for the fan unit inspec-

tion door EUAZ-14. See Fig. 1.

– Check that a qualified electrician has issued an

approval certificate prior to commissioning.

– Check that the impeller wheel rotates freely and that no

foreign objects are present which may be sucked in and

cause damage to the fan.

– If the fan is fitted with spring isolators, the transport

brackets must be removed before starting.

Important!

If the fans are not operated for more than 3 months

before or after installation, the fans must be rotated

by hand at regular intervals. If not, the ball bearing

may suffer the following damage; see the illustration.

Belastnings

Load-induced

damage

Fan EULK, c = 2, 4

Fläkt Woods 3227 GB 2008.04 3 Specifications are subject to alteration without notice

EU Air Handling Unit INSTALLATION

EULK is available with equipment for air flow measure-

ment, “d” = 1 or 3 in the EULK code. The air flow, q, can

be calculated from the following formula using a measure-

ment pressure of ∆p(Pa), and a constant k:

Temperature correction

The flow scale on the display instrument and the above

flow formula are applicable to air at a temperature of

+20°C. At other air temperatures, the flow must be cor-

rected using the formula:

where q = the actual flow through the fan, q20 = the flow

value reading and t = the prevailing temperature in °C.

q = q20 (273 + t)

293 , m3/s

√

Airflow measurement

+–

∆p

Fig. 7

q = (m3/s)

√∆p

The measurement pressure, ∆p, which is the difference

between the pressure in the empty part of the fan inlet

and the pressure inside the inlet cone, can be read with a

manometer (pressure range up to 6000 Pa) connected to

2 externally located nipples. The value of the constant k

is shown in the table below.

A flow indicator with a built-in pressure transducer,

STRZ-08, is available as an accessory. STRZ-08, which is

connected via hoses to the external nipples, converts the

measurement pressure into a flow (m3/s) which is indi-

cated on a display and gives an output signal of 0-10 V in

a linear relationship with the flow.

(See instruction for STRZ-08).

Size EULK- k

31-3, 32-2, 33-2, 40-2 11,14

40-3, 41-2, 42-1 8,78

41-3, 42-2, 44-2, 51-1 7,00

50-3, 51-2, 52-1 5,56

51-3, 53-2, 52-2 4,44

53-3, 52-3 3,54

Size EULK- k

20-2 41,09

20-3 34,96

21-2 27,59

21-3, 22-2, 30-2 20,62

30-3, 31-1 17,42

31-2, 32-1 14,87

Fläkt Woods 3227 GB 2008.04 4 Specifications are subject to alteration without notice

EU Air Handling Unit INSTALLATION

Fan EUL(B,F)

Installation of the frequency converter

Warning: Incorrect installation of the frequency

converter can damage the bearings in the motor.

It is Fläkt Woods' policy to only except claims when

the motor and frequency converter have been

supplied and installed by us.

Damage to the motor will not be accepted when the

motor has been connected to the frequency converter

by an installation engineer not provided by Fläkt Woods.

The frequency converter and the motor must be installed

by a qualified electrician with good knowledge of speed

regulated, drive system installations (frequency converters)

and EMC-safety.

The following recommendations should be seen as a

supplement to the manufacturer's installation instructions.

In those cases where there are differences, the

manufacturer's instructions shall take precedence over the

following; this is due to the warranty undertaking from the

manufacturer.

General

The installation between the motor and the frequency con-

verter should be carried out using screened, unbroken 4-

wire cable intended for EMC-installations for motor opera-

tions, the screen shall have at least 80% optical density, for

example, Nexan’s NCY or Ölflex Classic. The screen shall

have 360º contact with the casing both in the motor and in

the frequency converter to give the maximum contact sur-

face. Safety switches or connection boxes fitted between the

frequency converter and motor are not recommended.

Motor

The cable gland in the motor's outlet box should consist of

an EMC approved cable gland, for example, Miltronic

SKINTOP MS-SC. The screen conductor may only be

connected via EMC unions, not to earth bolts.

Frequency converter

Connection of the screening conductor shall be made via

an EMC approved union in the frequency converter's cas-

ing or by using a clamp intended for this purpose. The

screen conductor must not be connected to an earth bolt.

Connection of the screen conductor

In those cases the screen conductor must be connected to

an earth bolt in the motor or frequency converter, this

should be done so that the impedance is as low as possible,

in these cases, this conductor is limited in length to 5 times

its width. For example, when the screen conductor is 1 cm

wide it must not be longer than 5 cm.

Diverse

Besides this, the following should be observed:

•type of mains supply.

•local regulations and provisions.

•the manufacturer's installation instructions for the fre-

quency converter.

Outputs over 22 kW

In the event of outputs over 22 kW, a symmetrical

screened cable with concentric or in some other way

symmetrically designed protective earth conductor

should be used, please refer to the installation instruc-

tions for the frequency converter for recommendations

concerning these installations.

The screen

should have

360º contact

with the casing

The screen should

have 360º contact

with the casing

Insulating tape

Screen

Casing

Screen Insulating tape

FläktGroup EULK Fan Installation guide

FläktGroup EULK Fan Installation guide

FläktGroup EULK Fan Installation guide

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