INSTRUCTIONS FOR INSTALLATION AND MAINTENANCE
STEF-ATEX&HT ROOF FAN
2
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3 TECHNICAL DESCRIPTION
The fan is used to produce a required air volume at a specific pressure
that corresponds to the pressure losses of the duct system connect-
ed to the fan. This is achieved with a rotating impeller. The fan unit is
hinged onto the bottom plate so it can be tilted open for cleaning.
3.1 APPLICATIONS
Roof fans are designed to be used for the extraction of exhaust air. Do
not run the fan at a higher rotational speed than that specified in the
technical manual.
3.2 MOTORS
Below is a list of the motor types used in our different fans.
1 IMPORTANT INFORMATION
FläktGroup fans comply with the requirements for health and safety of
the EC Machinery Directive.
All fans leave the factory after being subjected to testing.
These instructions are intended for use by professional service staff.
The installation, commissioning and operation of the fans must be
carried out by professional staff who are familiar with the safety
regulations. Tools and protective equipment necessary for preventing
accidents from occurring while installing and operating the fan must
be used/worn in accordance with the local safety regulations.
All personnel involved with the product must carefully study this oper-
ating manual and diligently comply with all orders and instructions.
FläktGroup does not accept responsibility for any damage that can
be attributed to non-observance of these instructions. The warranty
issued by the manufacturer will be forfeited if any changes to the prod-
uct are made without the manufacturer’s consent.
2 SAFETY
This symbol is designed to highlight all safety
and danger related information relating to
danger to the life and health of operators.
Fan Motor construction Type
STEF-ATEX IEC 3~400VAC
STEF-HT IEC 3~400VAC
When using a frequency converter, the minimum control frequency is 20 Hz.
For STEF-ATEX, the permissible exhaust air temperature range is
-10…+40 °C.
For STEF-HT, the permissible exhaust air temperature range is -10…+40 °C (if
the fan is used for normal ventilation).
CONTENTS PAGE
1 Important information..............................................................................................2
2 Safety ............................................................................................................................2
3 Technical description .............................................................................................2
4 Transportation and storage ..................................................................................3
5 Installation ...................................................................................................................3
6 Commissioning .........................................................................................................8
7 Maintenance ...............................................................................................................8
8 Airflow measurement (STEF-HT) .......................................................................9
9 Product code ............................................................................................................10
10 Manufacturer’s declarations ............................................................................ 11
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4 TRANSPORTATION AND STORAGE
4.1 DELIVERY INSPECTION
Immediately upon receiving the fan, inspect it for damage that may
have occurred during transport. If you detect any damage caused in
transport, please contact the company responsible for transportation
without delay.
Check the fan specifications on the rating plate.
Proper procedures must be followed when transporting the product.
Inappropriate conditions may seriously damage the product.
4.2 TRANSPORT SAFETY
Transport equipment should be selected based on the package and
product weight. Loading must be performed according to instructions.
4.3 INTERMEDIATE STORAGE
If the fan is stored before use or between use, please take note of the
following:
- The original packaging should be used when storing the product;
additional protection may be used.
- The storage environment should be dry and dust free, and the
humidity must not exceed 70%.
- The storage temperature should be between -25 °C and +60 °C.
The appropriate instructions should be reviewed thoroughly before
commissioning.
4.4 LIFTING THE FAN
Ensure that a safe lifting method is used. The fans’ masses are listed
in section 5.3 (Installation of roof fan) and on the fan’s machine label.
5 INSTALLATION
The fan should be installed on the BOGA roof curb or on a chimney
built on site using a mounting frame.
5.1 SAFETY REGULATIONS
The fan meets the CE marking requirements. The fan must be installed
according to ENISO12100:2010.
Electrical installation should be performed by
authorized personnel only.
Power is to be isolated at the main switch
5 minutes before carrying out any electrical
installation or product repairs. Sudden start-ups
should be prevented.
These devices can be a danger to life because
of their rotating parts and the risk of electric
shock. The fan is not supplied with a protective
grille on the inlet. Contact protection should
be installed if there is any danger of coming
into contact with the impeller because of the
installation method.
The potential for malfunction during operation
cannot be completely ruled out. To prevent
hazards, the appropriate safety measures must
be taken by the system designer or builder.
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5.2 INSTALLATION PRINCIPLE OF THE BOGA ROOF CURB (ADDITIONAL
ACCESSORY)
More detailed installation instructions from the structural designer
1. Roof fan
2. Mounting frame (included in the roof fan delivery)
3. BOGA roof curb
4. Mounting beams (included in BOGA delivery)
5. Roofing felt/sheet (glued/screwed)
6. Cable glands
7. Thermal perforation of the lower end
BOGA size A B H
01&02 350 255 1203
03-05 570 475 1203
06&07 905 810 1203
01&02 472 255 1203
03-05 692 475 1203
06&07 1028 810 1203
EI60EI20
B
7.
H
A+15
1.
2.
3.
4.
5.
6.
The duct must be fastened completely inside the thermal perforation
of the lower end (dimension B), and in addition the end surface must
be thermally insulated to the same fire class as the demand for the
ducting is, using appropriate mineral wool. Wool must be mechanically
fixed according to wool manufacturer instructions.
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5.3 INSTALLATION OF THE ROOF FAN
The fan can be installed on the BOGA roof curb or by using a mounting
frame on a chimney built on site. The mounting frame is included in the
delivery.
1. Remove the mounting frame from the roof fan (attached with four
M8×35 bolts).
2. Fasten the sealing tape (included) on both sides of the mounting
frame. Check that the sealing tapes are flush with outer edge of the
mounting frame and cover the corners of the frame.
3. Install mounting frame carefully on the roof curb/chimney by using
four (eight on fan size 7) screws or wedge anchors. There are Ø10
mm holes on the mounting frame for this purpose.
Please note the following:
- Wind load on the fan as well as opening the fan will burden the joint.
- The safety switch and the roof curb’s electric cable lead-in should be
placed on the same side. This also determines the orientation of the
hinge.
Fan size STEF-ATEX mass [kg] STEF-HT mass [kg]
151 –
251 –
360 50
475 55
5 – 74
6 – 118
7 – 209
Hinge
Gasket
Safety switch
(additional accessory for the STEF-ATEX
fan, standard in the STEF-HT fan)
Mounting frame
Gasket
Chimney or roof curb BOGA
Lifting lugs
4. Lift the roof fan on top of the mounting frame, being careful not to
damage the seal, and install it in place with the M8×35 bolts (with
fan sizes 6 and 7 tighten bolts carefully by hand to not damage
the mounting frame or bottom plate). Lifting lugs are provided with
heavier fans to facilitate lifting. The table below lists the masses by
size category.
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5.4 ELECTRICAL CONNECTIONS
NOTE REGARDING CONNECTIONS
- The necessary electrical and general safety measures are to be
observed.
- If the motor is controlled by a frequency converter, the connections
must be made in accordance with the converter manufacturer’s
instructions. Take the fire mode into account (STEF-HT).
- Setting of parameters: see the converter manufacturer’s instructions.
- The motor must be earthed.
- In converter use, the maximum length of the power supply cable is
50 m (STEF-HT).
- A supply disconnect switch must be installed on the power supply
cable.
- The fan must always be equipped with a safety switch.
- The safety switch provided with the roof fan should be installed
near the roof fan. The safety switch also acts as a power supply
connection point.
- The motor must be protected by either the converter motor
protection or a motor protection switch.
- The supply voltage should match the voltage specified on the roof
fan’s machine label and wiring diagrams.
- The power supply cable and front fuses must be dimensioned to
conform to local regulations.
- The motor cable must be fire resistant (STEF-HT) of the installation
space requires it.
- If the plug in fuse for a small direct-drive three-phase motor (<0.55
kW) is dimensioned close to the rated current, there is a risk that a
fuse will blow on start-up and the motor will run in two phases. As a
consequence the motor will burn out. The current to the motor must
not vary so much as to trip the motor protection in this situation. The
fuse must be made larger or a three-phase circuit breaker must be
used.
- The thermistors of the ATEX motor must be connected to an
independently operating thermistor relay which will reliably cuts the
power supply to the motor in accordance with Section 1.5.1 of Annex
II (Essential health and safety requirements) to the ATEX Directive
2014/34/EU. Local installation regulations may allow thermistors to
be connected to devices other than thermistor relays, such as drive
control inputs.
- If the safety switch is installed in an ATEX space, it must be ATEX-
rated.
5.4.1 THE FAN IS EQUIPPED WITH A SAFETY SWITCH
1. Mount the safety switch in a suitable location (the mounting plate
supplied with the STEF-HT must be used, especially if the safety
switch is mounted on the fan casing or other surface that heats up
in the event of a fire); bear in mind opening the fan for maintenance.
2. Open the cover of the safety switch.
3. Thread the flexible power supply cable through the lead-in of the
safety switch. Save enough cable so that the fan section can be
opened during maintenance.
4. Make the connection and close the safety switch cover.
5. Check the operation of the safety switch.
5.5 CIRCUIT DIAGRAM
5.5.1 STEF-ATEX
Single-speed three-phase motor, star connection.
Safety switch (ADDITIONAL
ACCESSORY)
Distribution box
(NOT INCLUDED IN DELIVERY)
E4503497
6. When starting the fan, make sure that the direction of rotation is
correct.
5.4.2 FAN EQUIPPED WITH A SAFETY SWITCH INSTALLED ON LOCATION
1. Mount the safety switch in a suitable location; bear in mind opening
the fan for maintenance .
2. Open the safety switch cover.
3. Connect the cable from the fan motor to the safety switch.
4. safety switch. Save enough cable so that the fan section can be
opened during maintenance.
5. Make the connection and close the safety switch cover.
6. Check the operation of the safety switch.
7.
When starting the fan, make sure that the direction of rotation is
correct.
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5.5.2 STEF-HT
8
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6 COMMISSIONING
6.1 SAFETY INSPECTION
Prior to start-up check that there are no loose or foreign objects in the
fan or duct system. Also check also that the fan has been installed
according to instructions. All the required protective equipment should
be installed.
The fan may only be commissioned once the appropriate instructions
have been followed and inspections have been performed.
6.2 TEST RUN
Run the fan briefly to check that the direction of rotation is correct
and that the fan wheel rotates freely. If this is the case, the fan can be
switched on. Also check for abnormal mechanical noise from the fan,
and that the fan is firmly mounted.
7 MAINTENANCE
7.1 ATEX FAN
The non-sparking version (ATEX) must be checked at least twice a
year (impeller and motor) for possible
problems. If necessary, the impeller/motor must be cleaned/replaced.
7.2 FLUE GAS FAN
The operation of the flue gas fan is to be checked in accordance with
local regulations. However, it should be verified at least every 6 months
by starting the fan and ensuring its trouble-free operation. If the fan
is also used for normal ventilation, the operation of the fan and the
need for cleaning (with any accessories) must be checked more often,
taking into operating conditions into account. Motor replacement is
recommended after 20,000 operating hours.
7.3 GUARANTEE
This guarantee is granted on condition that installation has been
carried out correctly and that the required maintenance has been
performed accordingly. Faults covered by the guarantee should be
reported to the manufacturer or importer immediately. The guarantee
does not cover maintenance operations or indirect costs.
7.4 MAINTENANCE
Power is to be isolated at the main switch
5 minutes before carrying out maintenance
operations. Sudden start-ups should be
prevented.
Make sure that fans that have been opened for
maintenance cannot fall closed.
7.4.1 CLEANING THE FAN WHEEL, MOTOR AND CASING
1. Disconnect the power supply to the fan at the safety switch and wait
at least 5 minutes.
2. Loosen the screws on the opening side by 10 mm so that the fan
section can be opened on its hinges. The stay rod (1 or 2, depending
on the size of the fan) locks automatically in its maximum position.
3. Make sure that the lever locks properly and that the bottom plate
and mounting frame fastenings are secure.
4. Perform the necessary cleaning operations.
5. Release the stay rod(s) by lifting the rod or pressing the locking
lever (depending on the size). Lower the fan section into position and
tighten the fastening screws. Start the fan. Make sure the fan wheel
rotates freely.
The casing may also be cleaned from above by removing the top plate;
see section 7.4.2, step 4.
Locking lever
Stay rod
Fastening screw
End bolt & washer
Opening side
Hinge side
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7.4.2 REPLACING THE MOTOR AND FAN IMPELLER
1. Disconnect the power supply to the fan at the safety switch
and wait at least 5 minutes.
2. Open the fan section as described in steps 2 and 3 of
section 7.4.1.
The open chimney should be protected to avoid debris, parts and
tools falling inside.
3. Remove the impeller end bolt & washer (see image in
section 7.4.1) and remove the impeller from the motor shaft.
Use a puller if necessary.
4. Lower the fan section and remove the roof and crossbar (and
motor protection for the STEF-HT version). Remove the cable
and motor.
5. Install the new motor and impeller in reverse order.
6. Lower the fan section and tighten the fastening screws. Start
the fan. Make sure the direction of rotation is correct and the
fan wheel rotates freely, and listen for unusual noises in the fan.
Top plate
Outer casing
(STEF-ATEX)
Crossbar
Hatch
(STEF-ATEX)
7.5 DISPOSAL OF THE PRODUCT
- All electrical components should be taken to an appropriate
recycling facility for disposal.
- Steel materials should be recycled.
- The product contains only very few plastic parts. The parts
are manufactured from recyclable materials.
8 AIRFLOW MEASUREMENT (STEF-HT)
The STEF-HT roof fan can measure airflow as standard. Airflow
measurement is taken using a manometer as a differential pressure
measurement. The measuring connections are located on the outer
casing of the roof fan and marked with +/-. A manometer or a separate
measuring device can be connected to the measuring connections. The
accuracy of airflow measurement is ± 10%.
To obtain the airflow corresponding to the differential pressure
measurement with an air density of 1.2kg/m³, the following formula is
used:
q
v
= airflow [m
3
/s]
k = fan-specific constant
Δp
m
= differential pressure measurement [Pa]
The fan-specific values for k can be found on the rating plate next to
the measuring connections and in the table below. The values apply
when using m³/s for calculation.
STEF k
323.72
422.64
515.33
610.41
75.89
qv=√Δpm
k
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PRODUCT CODES
Roof fan STEF-a-bbb-c-91-5
Size (a)
1, 2, 3, 4
Motor type (bbb)
0 = three-phase motor
Number of poles (bbb)
04, 06 (sizes 1 and 2 only with 4-pole motor)
Material (c)
1 = galvanised steel sheet, painted black
2 = ZM275-coated steel sheet
Model (dd)
91 = Ex db eb (Ex de) motor (IIB, T4, IP 55, insulation class F)
Version (e)
5
9 PRODUCT CODE
OPTIONAL
Roof curb, EI60 or EI120 BOGA-aa-2-c-d
Size (aa)
01, 02, 03, 04
Return damper (b)
2 = no return damper
Model (c)
4 = 1200 mm, EI60, 60 mm insulation
6 = 1200 mm, EI120, 120 mm insulation
Version
2, with EI60 version
3, with EI120 version
Safety switch SAFE-4-0-0
4 = ATEX model, three poles, auxiliary contact
0 = supplied loose
Version
Painting 60 μm (RAL classic shades of colour) STEF-a-MAALAUS-60
Fan size (a)
1…4
PRODUCT CODE
Roof fan STEF-a-bbb-c-6-4
Size (a)
3, 4, 5, 6, 7
Motor type (bbb)
0 = three-phase motor
Number of poles (bbb)
04, 06 (see the technical brochure for the right figure)
Material (c)
1 = galvanised sheet steel, painted black
2 = ZM275-coated sheet steel
Model (d)
6 = HT (high temperature)
Version (e)
4
NOTE! The SAFE safety switch and mounting frame are included in the
delivery of each STEF-HT roof fan.
OPTIONAL
Roof curb EI120 BOGA-aa-2-6-3
Size (aa)
03, 04, 05, 06, 07
Return damper (b)
2 = non return damper
Model (c)
6 = 1200 mm, EI120, 120mm insulation
Version (d)
3
Frequency converter STYR-aa-3-62-0-1
Power (aa)
17…21 (see the technical brochure for the right figure)
Voltage (b)
3 = 3-phase 400 V
Fan model and IP class (cc)
62 = STEF-HT, IP55
Installation (d)
0 = supplied loose
Version (e)
1
Pressure adjuster (230 V, supplied separately) STYZ-01-10-0-3
Timer (supplied separately) STYZ-01-40-0-0
Painting 60 μm (RAL classic shades of colour) STEF-a-MAALAUS-60
Fan size (a)
3…7
STEF-HT STEF-ATEX
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10 MANUFACTURER’S DECLARATION
FläktGroup Finland Oy, Rydönnotko 1, FIN-20360 TURKU, +358 20 442 3000, www.flaktgroup.com
FG_DC_10580GB 20210609_R0
CE – Declaration of Conformity
MANUFACTURER: FläktGroup Finland Oy
ADDRESS: Rydönnotko 1
20360 Turku
FINLAND
We hereby assure that
PRODUCT: Smoke exctract fan Roofmaster STEF-HT with accessories, equipped with
AC asyncronous motor and intended for use as class F400(120) fan,
fulfills fundamental requirements of directives and standards mentioned
below on the understanding that above-mentioned product is installed, used
and maintained according to instructions delivered with the product. If any
changes are made to the product, this declaration is no longer valid.
DIRECTIVES: 2006/42/EY (Machinery directive)
2014/30/EU (EMC-directive)
2014/35/EU (Low voltage directive)
2009/125/EY (ErP-directive)
305/2011 EU (Regulation, replaces directive 89/106/ETY)
STANDARDS : EN 12101-3
EN ISO 12100
EN ISO 13857
CERTIFICATE: 0809-CPR-21002926
ISSUED BY: Eurofins Expert Services Oy, notified body no. 0809
DECLARATION OF PERFORMANCE:
FG_DC_10581GB_STEF-HT roof fan_DOP_20210609_R0
DATE: 09.06.2021
SIGNATURE:
Jari Hokkanen
R&D Director, FläktGroup Finland Oy
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FläktGroup DC_10420GB 2022-10-04_R3
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EC Declaration of Conformity
Manufacturer: FläktGroup Finland Oy
Address: Rydönnotko 1
FI-20360 Turku
Name and address of the person authorised to compile the relevant technical documentation:
Name: Heikki Stenberg Address: as above
Confirms that:
STEF roof fan with accessories and including the following
motor – drive combinations:
Induction AC-motor Ex de IIB T4 to be used with VSD
is classified as follows: Group II, Category 3G, Gas group IIB, temperature class T3 using Exde IIB T4 motor
and protection class EPL Gc.
CE II 3G Ex h IIB T3 Gc
The specific technical documentation has been written and is available. The specific documentation will be
transmitted to a reasoned request by national authorities.
and that this machinery is in conformity with the provisions of the following other EC-Directives:
2014/34/EU ATEX Directive
2006/42EC Machinery Directive
2014/35/EU Low Voltage Directive
2014/30/EU EMC Directive
2009/125/EC ErP-Directive
And furthermore, declares that
the following (parts/clauses of) European harmonised standards have been
applied: SFS-EN 14986:2017, EN ISO 12100:2010, EN ISO 13857:2008, EN
61000-6-2:2011, EN 61000-6-3:2011, EN ISO 5801 and is compliant with the
Regulation 327/2011.
This Declaration is valid only when the installation of the fan is done according to the instructions and no
modifications on the fan or accessories have been made.
Turku, 1.9.2018 Heikki Stenberg
R&D Manager
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FG_DC_10581GB 20210609_R0
DECLARATION OF PERFORMANCE
Nro. 020CPR2021-06-09
1. Product: Roof fan Roofmaster STEF-HT (STEF-a-bbb-c-6-4)
2. Intended use: Powered smoke and heat exhaust ventilator for use in construction works,
dual-purpose use
3. Manufacturer: FläktGroup Finland Oy, Rydönnotko 1, FI-20360 Turku
Tel: +358204423000, Email: info.fi@flaktgroup.com
4. System of AVCP: System 1
5. Harmonized standard: EN 12101-3:2015
6. Notified Body: Eurofins Expert Services Oy, nr. 0809
Performed determination the product type on the basis of type testing; initial
inspection of the manufacturing plant and of factory production control;
continuous surveillance, assessment and evaluation of the factory production
control (FPC) under system 1 and issued: Certificate of constancy of
performance 0809-CPR-21002926
7. Declared performance:
The performance of the product identified above is in conformity with the set of declared performance.
This declaration of performance is issued, in accordance with Regulation (EU) No 305/2011, under the
sole responsibility of the manufacturer identified above.
Signed for and on behalf of the manufacturer by:
Jari Hokkanen, R&D Director Turku 09.06.2021
…………………………………………...........
Essential charasteristics Performance Harmonized technical specification
Response delay NPD
Operational reliability
- Application categories
Dual purpose
- Motor rating Temp B/insulation F
Effectiviness of smoke/hot gas extraction
±
10%
Resistance to fire F400 (120)
Ability to open under environmental conditions NPD
Durability of operational reliability Temp B/insulation F
EN 12101-3:2015
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FG_DC-10420GB_STEF-ATEX&HT Roof fan_IN-MA_2022-10-04_R3 © Copyright 2022 FläktGroup
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