SOLID AIR FDC25 Page 4 Manual Download

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SOLID AIR ®

CLIMATE SOLUTIONS

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T +31 598 36 12 21

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www.solid-air.com

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[email protected]

- 58

Product overview

Technical data

Models

Ordering key

Dimensions

Installations

Actuators

Accessories

Replacements

Maintenance and operation

1.  Galvanized steel casing
2.  Fire resistant damper blade
3.  Actuator
4.  Intumescent joint
5.  Connection flanges
6.  Thermal fuse

1.  Gypsum layers
2.  Intumescent strip
3.  Cold smoke seal
4.  Contact layer

Summary of Contents for FDC25

Page 1: ...MANUAL FDC25 FDC40 Round fire damper 05 2021 ...

Page 2: ...1 598 36 12 21 www solid air com mail solid air com TABLE OF CONTENTS Product overview 3 Technical data 6 Models 8 Ordering key 9 Dimensions 11 Installations 18 Actuators 42 Accessories 46 Replacements 51 Maintenance and operation 58 ...

Page 3: ...nism is equipped with thermal fuse that is triggered automatically when the temperature inside the duct reaches 72 C It can also be activated manually by the push of the button on the mechanism Additional equipment for manual mechanism include end contact switches for damper position signalling Electromagnetic actuators feature spring return mechanism with electromagnet for remote activation Addit...

Page 4: ...a Models Ordering key Dimensions Installations Actuators Accessories Replacements Maintenance and operation 1 2 3 6 4 5 1 4 3 1 Galvanized steel casing 2 Fire resistant damper blade 3 Actuator 4 Intumescent joint 5 Connection flanges 6 Thermal fuse 1 Gypsum layers 2 Intumescent strip 3 Cold smoke seal 4 Contact layer 2 ...

Page 5: ...rt 2 Fire dampers Classification of the fire dampers is defined according to EN 13501 3 Fire classification of construction products and building elements Installation in both vertical and horizontal axis of rotation of the dampers blade is acceptable with the axis angle 0 360 Fire resistance of fire damper depends on classification of walls or ceilings It is allowed to install products to walls o...

Page 6: ...year of its publication 10 Barcode 11 CE mark Nominal sizes 100 800 mm Casing length 380 mm Temperature range 20 C 50 C Release temperature 72 C standard of 95 C optional with electric actuator Volume flow rate range up to 21 700 m h Differential pressure range up to 2 000 Pa Casing air leakage Class C ATC3 EN 1751 Closed blade air leakage Class 2 EN 1751 Upstream velocity 12 m s EC conformity EN ...

Page 7: ...ted using the following formula Δp Pa ζ v 0 6 Where ζ is Zeta value from the tables below v is airflow velocity in m s FDC25 d100 d125 d160 d200 d250 d315 ζ 1 759 0 852 0 545 0 445 0 340 0 293 FDC40 d355 d400 d450 d500 d560 d630 d710 d800 ζ 0 428 0 389 0 344 0 325 0 312 0 232 0 206 0 179 Diameter mm Cross section dm Net area dm FDC25 100 0 74 0 50 125 1 17 0 87 160 1 93 1 55 200 3 05 2 56 250 4 79...

Page 8: ...ith 40 mm damper blade and fire classification up to EI120S Sizes range from d355 till d800 FDC25 MF1 MF2 Cylindrical fire damper with integrated MF1 installation frame with 25 mm damper blade and fire classification up to EI60S Sizes range from d100 till d315 FDC40 MF2 Fire damper with integrated MF2 installation frame with 40 mm damper blade and fire classification up to EI90S Sizes range from d...

Page 9: ...anism type 4 Accessories FDC25 d250 M230 S IH FDC25 100 to 315 FDC40 355 to 800 FDC25 APP 100 to 315 FDC25 MF1 100 to 315 FDC25 MF2 100 to 315 FDC40 MF2 355 to 800 Damper diameter 100 till 800 mm R manual drive R S manual drive with limit switches M230 S electric actuator AC 230V M24 S electric actuator AC DC 24V M24 S ST electric actuator AC DC 24V with connection plug EMS S electromagnetic drive...

Page 10: ...losing can be initiated either by thermoelectric release device or remotely by triggering the electro motor Upon closure damper blade is locked in closed position and can be opened by sending a signal to electro motor Standard thermoelectric release point is 72 C optional 95 C M24 S Belimo 24V electro motor operating mechanism comes with integrated end switches In case of fire the fire damper clos...

Page 11: ...0 Weight kg 3 8 4 2 4 7 5 4 6 3 7 7 11 9 13 5 15 4 17 5 23 6 27 7 33 7 Product A mm C mm D mm E mm FDC 25 55 150 105 150 FDC 40 55 200 105 200 FDC25 FDC40 R manual mechanism Automatic closure when the temperaturein the duct exceeds 72 C Manual rearming with handle Manual unlocking possible for periodical test of fire damper Optional with end position switches R S FDC25 fire dampers are equipped wi...

Page 12: ...5 7 6 2 6 9 7 8 9 2 12 2 13 8 15 7 17 8 23 9 28 34 FDC25 FDC40 EMS solenoid actuator Electromagnetic actuator with integrated limit switches and thermal fuse release mechanism 72 C Manual rearming with handle Remote closing with electromagnetic actuator Manual closing possible EMS solenoid actuator is constantly under power Actuating mechanism is tripped when the power is interrupted or thermal fu...

Page 13: ...hermoelectric release device for warm air installations see page 46 Accessories Length of damper blade outside of casing Y dimension on front side FDC 40 d540 X Ø d 2 270 mm X is not visible in the drawing FDC 25 40 Y Ø d 2 110 mm 380 Ød C A D Y Ød 2 12 E C A Ød 2 12 FDC25 FDC40 M up to d315 FDC25 M FDC40 M Ø d mm 100 125 160 200 250 315 355 400 450 500 630 710 800 Weight kg 4 5 4 9 5 4 6 1 7 8 4 ...

Page 14: ... 100 45 n n A Ød 380 100 45 Ød A Ød 2 80 Ød 2 94 FDC25 APP M FDC25 APP R FDC25 APP Applique installation frame Applique kit is an installation subframe for quick and easy installation in rigid and flexible walls Made out of calcium silicate boards Quick wall mounting with screws Factory assembled to the fire damper Damper diameter Ø d mm Applique frame diameter Ø d A mm 100 Ø d 105 mm 125 160 Ø d ...

Page 15: ... Dn 118 D n 1 1 8 3 6 36 Ød 118 R 4 0 62 82 Dn 380 Dn 118 Dn 118 36 36 62 82 Dn 380 Dn 118 Dn 118 36 36 380 82 62 36 Ød 118 36 R 4 0 FDC25 MF1 M FDC25 MF1 EMS FDC25 MF1 installation frame MF1 is an installation frame for quick and easy installation in rigid and flexible walls Made out of calcium silicate boards Quick wall mounting with screws Factory assembled to the fire damper FDC25 MF1 R FDC25 ...

Page 16: ... R 4 0 Ød 380 103 5 65 Ød 118 Ød 118 36 36 R 4 0 FDC25 MF2 M FDC25 MF2 EMS FDC25 MF2 installation frame MF2 is an installation frame for quick and easy installation in rigid flexible and shaft walls Made out of calcium silicate boards Quick wall mounting with screws Factory assembled to the fire damper FDC25 MF2 R FDC25 MF2 EMS FDC25 MF2 M Ø d mm 100 125 160 200 250 315 100 125 160 200 250 315 100...

Page 17: ... installation in rigid flexible and shaft walls Made out of calcium silicate boards Quick wall mounting with screws Factory assembled to the fire damper Ød 380 103 5 65 Ød 120 30 30 Ød 120 66 R 4 0 FDC40 MF2 R FDC40 MF2 EMS Ød 65 Ød 120 30 30 Ød 120 25 380 103 5 R 4 0 FDC40 MF2 M FDC40 MF2 R FDC40 MF2 EMS FDC40 MF2 M Ød mm 355 400 450 500 630 800 355 400 450 500 630 800 355 400 450 500 630 800 Wei...

Page 18: ... or in vertical position The installation must comply with the tests that were performed during certification Avoid any obstruction of the moving blade by the connected ducts The class of air tightness is maintained in case the installation of the damper is made in accordance with the technical manual Operating temperature 50 C max For indoor use only The gap in the installation opening between th...

Page 19: ...0 mm Gypsum blocks 995 kg m3 Gypsum plaster mortar and cover boards EI 120 ve i o S 500 Pa 100 mm Plasterboard type A EN520 Gypsym plaster mortar EI 120 ve i o S 500 Pa Mineral wool and cover boards EI 90 ve i o S 500 Pa Fire Batt Weichschott EI 90 ve i o S 300 Pa Floor Ceiling 100 mm Aerated concrete 550 kg m3 Reinforced concrete 2200 kg m3 Gypsum plaster mortar EI 120 ho i o S 500 Pa Fire Batt W...

Page 20: ...0 mm Installation material is gypsum plaster or mortar INSTALLATION 1 Create an opening in the wall minimal dimensions on page 13 and bend the fixing bracket 1 90 Place the damper in the opening up to the wall limit mark 7 on the damper Damper blade must be closed during the installation 2 Fix the damper to the wall using screws Bracket screw hole is 6 mm in diameter 3 Fill the space between the d...

Page 21: ...MINERAL WOOL SEALING INSTALLATION 1 Create an opening in the wall Ø d 80 mm x Ø d 80 mm Bend the fixing bracket 1 90 Place the damper in the opening up to the wall limit mark 7 on the damper Damper blade must be closed during the installation 2 Fix the damper to the wall using screws Bracket screw hole is 6 mm in diameter 3 Fill the space between the damper and the wall with mineral wool 3 100 kg ...

Page 22: ...ate an opening in the wall Ø d 200 mm x Ø d 200 mm Bend the fixing bracket 1 90 Place the damper in the opening up to the wall limit mark 7 on the damper Damper blade must be closed during the installation 2 Close the space between casing and wall with two layers of mineral wool 5 density 140 kg m ormore 50 mm thick coated on one side 3 Seal the connections of mineral wool with intumescent fire re...

Page 23: ...TALLATION MORTEL AFWERKING INSTALLATION 1 Create an opening in the wall minimal dimensions on page 13 Bend the fixing bracket 1 90 Place the damper in the opening up to the wall limit mark 7 on the damper Damper blade must be closed during the installation 2 Fix the damper to the wall using screws bracket screw hole is 6 mm in diameter 3 Fill the space between the damper and the wall with mortar 2...

Page 24: ...XIBLE WALL INSTALLATION MORTAR SEALING INSTALLATION 1 Create an opening in the wall Ø d 80 mm x Ø d 80 mm and build the subframe according to the drawing see page 32 Bend the fixing bracket 1 90 Place the damper in the opening up to the wall limit mark 7 on the damper Damper blade must be closed during the installation 2 Fix the damper to the wall using screws bracket screw hole is 6 mm in diamete...

Page 25: ...ATION MINERAL WOOL SEALING INSTALLATION 1 Create an opening in the wall Ø d 80 mm x Ø d 80 mm and build the subframe according to the drawing see page 33 Bend the fixing bracket 1 90 Place the damper in the opening up to the wall limit mark 7 on the damper Damper blade must be closed during the installation 2 Fix the damper to the wall using screws bracket screw hole is 6 mm in diameter 3 Fill the...

Page 26: ...TIE 1 Create an opening in the wall Ø d 200 mm x Ø d 200 mm and build the subframe according to the drawing see page 32 Bend the fixing bracket 1 90 2 Place the damper in the opening up to the wall limit mark 7 on the damper Damper blade must be closed during installation 3 Close the space between casing and wall with two layers of mineral wool 5 density 140 kg m or more 50 mm thick coated on one ...

Page 27: ...tallation material is gypsum plaster or mortar 1 2 3 3 Installatie in de vloer Installatie in het plafond 1 2 7 RIGID FLOOR CEILING INSTALLATION MORTAR SEALING INSTALLATION 1 Create an opening in the floor ceiling minimal dimensions on page 13 and bend the fixing bracket 1 90 Place the damper in the opening up to the wall limit mark 7 on the damper Damper blade must be closed during installation 2...

Page 28: ...CHOTT INSTALLATION 1 Create an opening in the floor ceiling Ø d 200 mm x Ø d 200 mm Bend the fixing bracket 1 90 2 Place the damper in the opening up to the wall limit mark 7 on the damper Close the space between casing and floor ceiling with two layers of mineral wool 5 140 kg m 50 mm thick coated on one side Damper blade must be closed during installation 3 3 Connections of mineral wool should b...

Page 29: ...allation 1 Suspension strut should be connected with drop rods 8 10 mm to the floor slab above It is used to support the damper and ease the installation 2 When using L profile fixation support steel C profile with 50 mm high peace of aerated concrete or similar rigid material Not necessary if connecting rods directly to damper 3 Damper casing is fixed to suspended and supported steel C profiles b...

Page 30: ...d during installation 1 Suspension strut should be connected with drop rods 8 10 mm to the ceiling slab above It is used to support the damper and ease the installation 2 If using L profile fixation support steel C profile with 50 mm high peace of aerated concrete or similar rigid material Not necessary if connecting rods directly to damper 3 Damper casing is fixed to suspended and supported steel...

Page 31: ...imum density of 2200 kg m and with a minimum thickness of 100 mm Wall opening dimensions Damper Ø d mm Applique frame Ø D mm Wall opening mm 100 Ø d 105 mm Ø d 115 mm 125 180 Ø d 95 mm Ø d 105 mm 200 315 Ø d 80 mm Ø d 90 mm INSTALLATION 1 Create a wall opening according to the dimensions in the table below Damper blade must be closed during installation 2 Insert fire damper into wall and fasten wi...

Page 32: ...with minimum thickness of 70 mm Wall openings dimensions Damper Ø d mm Applique frame Ø D mm Wall opening mm 100 Ø d 105 mm Ø d 115 mm 125 180 Ø d 95 mm Ø d 105 mm 200 315 Ø d 80 mm Ø d 90 mm 1 2 GYPSUM BLOCKS WALL INSTALLATION APPLIQUE INSTALLATION FRAME INSTALLATION 1 Create a wall opening according to the dimensions in the table below Damper blade must be closed during installation 2 Insert fir...

Page 33: ...ral wool 100 kg m The minimum thickness of the wall is 100 mm Wall opening dimensions Damper Ø d mm Applique frame Ø D mm Wall opening mm 100 Ø d 105 mm Ø d 115 mm 125 180 Ø d 95 mm Ø d 105 mm 200 315 Ø d 80 mm Ø d 90 mm 1 2 FLEXIBLE WALL INSTALLATION APPLIQUE INSTALLATION FRAME INSTALLATION Create an opening according to the table below and build the subframe according to the drawing see page 39 ...

Page 34: ...locks minimum density of 550 kg m or reinforced concrete minimum density of 2200 kg m and with a minimum thickness of 100 mm 1 2 3 RIGID WALL INSTALLATION MF1 MF2 INSTALLATION FRAME INSTALLATION 1 Create an opening in the wall FDC25 Ø d 10 mm FDC40 Ø d 25 mm Damper blade must be closed during installation 2 Place the damper in the opening 3 Fasten the fire damper with screws FDC25 4 pcs 6 x 160 mm...

Page 35: ...wall is composed of gypsum blocks minimum density of 995 kg m and with mini mum thickness of 70 mm 1 2 3 GYPSUM BLOCKS WALL MF1 MF2 INSTALLATION FRAME INSTALLATION 1 Create an opening in the wall FDC25 Ø d 10 mm FDC40 Ø d 25 mm Damper blade must be closed during installation 2 Place the damper in the opening 3 Fasten the fire damper with screws FDC25 4 pcs 6 x 160 mm FDC40 12 pcs 6 x 160 mm Test t...

Page 36: ...nstruction The interior of the wall is filled with mineral wool 100 kg m The minimum thickness of the wall is 100 mm 1 2 3 FLEXIBLE WALL INSTALATION MF1 MF2 INSTALLATION FRAME INSTALLATION 1 Create an opening in the wall FDC25 Ø d 10 mm FDC40 Ø d 25 mm and build the subframe according to the drawing see page 35 Damper blade must be closed during installation 2 Place the fire damper in the opening ...

Page 37: ...tal studs make a steel subframe according to drawing 3 Damper blade must be closed during installation 2 Place the fire damper in the opening 3 Insert fire damper into wall and fasten with screws 12 pcs 6 x 160 mm FDC25 4 pcs 6 x 160 mm FDC40 12 pcs 6 x 160 mm Test the operation of the damper blade Dimension G depending of the damper type is FDC 25 G 10 mm FDC 40 G 25 mm 2000 mm d G d G Ø d G 103 ...

Page 38: ...rod for suspension should be M12 or more 2 Install fire damper and secure it with self tapping screws 4 3 x 10 to duct every 300 mm M12 or more Fill space between duct and wall with mineral wool Isover U protect min 80 mm thickness Additionally paint wool with Isover BSF in thickness of 1 mm 3 Close installation with L profiles 30 x 30 x 3 mm Additionally fix profiles to duct with self tapping scr...

Page 39: ...mineral wool 1 Prepare opening in the wall according to the installation type Weichschott Firebatt installation build the subframe according to the drawing page 42 Mortar Gypsum blocks 1 Prepare opening in the wall according to the page 13 Fire damper can be installed with minimal distance of 30 mm between wall ceiling and 30 mm from other dampers 2 Insert the fire dampers into the wall and fill t...

Page 40: ... SOLUTIONS T 31 598 36 12 21 www solid air com mail solid air com 40 58 Product overview Technical data Models Ordering key Dimensions Installations Actuators Accessories Replacements Maintenance and operation 1 1 2 4 3 ...

Page 41: ...eplacements Maintenance and operation INSTALLATION When installing the fire dampers in the flexible walls it is necessary to make a metal subframe onto which the damper will be fixed with screws Subframe should be prepared according to the drawings below FLEXIBLE WALL SUBFRAME FDC25 FDC40 d 80 Ø d 80 d 80 d 80 d 80 d 80 2 Ø d 80 FDC25 MF1 FDC40 MF2 d 10 d 10 Ø d 10 d 25 d 25 Ø d 25 d 25 2 ...

Page 42: ...e easily replaceable and available as service parts To upgrade to EMS change R25 to R40 R40 R40 manual actuator is installed on FDC40 fire dampers up to size d800 It is available in version with R S and without R end switches In case of need for remote activation R40 actuator is easily upgradeable to electromagnetic EMS S actuator with installation of the electromagnet End switches thermal fuse an...

Page 43: ...d position and can only be opened manually Thermal fuse melting point is 72 C EMS S mechanism is the same for FDC25 FDC40 fire dampers SOLENOID ACTUATOR EMS S TECHNICAL SPECIFICATION Nominal voltage Solenoid 24 48 VDC Power Dual voltage Solenoid Break of current Pnom 1 6 W Switching capacity 1 mA 500 mA 5 VDC 48 VDC Blade closing time Spring 1 second Blade opening time Manual Manual activation Rel...

Page 44: ...ise for a quarter of a turn for Belimo BF or release brake for Belimo BFL and BFN After release damper will be closed by return spring When damper is opened manually electric actuator will not move the damper into closed position in case of power failure TECHNICAL SPECIFICATIONS Type Belimo actuator BFL24 T BFN24 T BFL230 T BFN230 T BF24 T BF230 T Nominal voltage power consumtion voltage AC DC 24 ...

Page 45: ...without connecting to a voltage with enclosed Allen key by turning in the direction of the arrow on electric actuator clockwise After release of Allen key damper will go to closed position Type Examination Certificate Number EXA 14 ATEX0064X Equipment complies with the essential health and safety requirements relating to the design and construction of equipment intended to use in potentially explo...

Page 46: ... Kit dimensions Ø 300 mm 2 Flexible duct connections Flexible duct connectors are used in HVAC systems for isolation from strucure borne noise expansion compensation and fire damper connections 3 Safety grilles Fire damper safety grille and if applicable extension piece are assembled at the factory to form a unit The free cross sectional area of the cover grille is approx 70 1 Type 2 Accessoiries ...

Page 47: ...arts only A Eindcontacten S kit CEE FDC A R25S KIT see page 43 A Eindcontacten S kit CEDC FDC A R40 KIT see page 43 B Thermische zekeringset FDC A THERM 72 C Elektromagnetische bediening FDC A EMS KIT D Plug voor inspectieopening FDC A IH E Console voor communicatiemodule FDC A CMB F Belimo thermo elektrisch element 72 C FDC A ZBAE72 G Belimo thermo elektrisch element 95 C FDC A ZBAE95 H Ombouw ki...

Page 48: ...ns for 24 V and 230 V power supply are available it is completely assembled in the factory 1 Type 2 Accessories 3 Dimension 4 Voltage FDC A SSA d100 24 FDC A Accessories for round fire damper SSA Smoke sensor assembly d100 d800 Nominal diameter of the round fire damper 24 Smoke sensor 24V 230 Smoke sensor 230V FDC A UG 5 AFR 24V FDC A UG 5 AFR 230V Voltage Supply 24V AC DC 15 10 Not polarity sensi...

Page 49: ...A ST5 B Rubber gasket FD A HFU204 C Isolation extension FD A HFU500 For more information visit website Technical documentation Calectro A B C FDC A UG 5 AFR 24V FDC A UG 5 AFR 230V WIRING DIAGRAM Jumper ON disables air flow monitoring Contamination Air flow alarm Failure Smoke alarm Smoke alarm Test Reset Test Reset 24V AC DC 24V AC DC 24V AC DC 24V AC DC Jumper ON disables air flow monitoring Con...

Page 50: ...te and remove hex screws 2 Rotate the smoke sensor casing 90 180 270 3 Fix the screws following the fourth step of smoke sensor rotation SMOKE SENSOR ROTATION Smoke sensor assembly is supplied with standard right airflow direction If the airflow direction is opposite smoke sensor can be rotated by following below instructions 1 Locate hex screws unscrew them and remove the cover Pay attention to d...

Page 51: ...cements Maintenance and operation UPGRADE TO END CONTACTS R25 R25 S UPGRADE TO END CONTACTS R40 R40 S REPLACEMENTS 1 Locate hex screw unscrew it and remove the cover 2 Insert CEE for R25 CEDC for R40 board in the appropriate place 3 Screw the board to the plate Put the cover back in place Video instructions https www youtube com watch v NCs5Y_3OagY feature you tu be ab_channel Klimaopremad d ...

Page 52: ...stall kit for end contacts FDC A R40S KIT To upgrade R25 RS25 S to EMS it is necessary to install R40 mechanism FD A R40 and kit for end contacts FDC A R40S KIT REPLACEMENT 1 Locate hex screw Unscrew it and remove the cover 2 Insert the EMS on the custom plate 3 Screw the EMS to the plate and connect the 2 pin connector into the appropriate socket on the CEDC board 4 Put the cover back in place Te...

Page 53: ... and operation REPLACEMENT OF THERMAL FUSE R25 1 Find the hex screw located on the cover unscrew and remove the screw and the cover 2 Find the hex screw on the thermal fuse and unscrew it 3 Remove the old thermal fuse Insert a new thermal fuse and screw it back on 4 Put the cover back in place Test the operation of the damper blade 1 2 3 4 REPLACEMENT Video instruction https www youtube com watch ...

Page 54: ...nd the hex screw located on the cover unscrew and remove the screw and the cover 2 Remove the position indicator sleeve 3 Locate the 3 hex screws Unscrew them Remove the CEDC board if applicable 4 Locate the screw on the thermal fuse Unscrew it Remove the old thermal fuse Insert a new thermal fuse Put the CEDC board and the cover back in place Test the operation of the damper blade 1 2 3 4 Video i...

Page 55: ...plate A with BE transition plate NOTE Pay attention to the position of indication cut on the BE transition plate 3 Insert the rubber plug into the opening for the thermal fuse Install the Belimo actuator and fasten it with screws 2 hexagon screws M6 x 55 4 Drill hole Ø 16 mm for the fuse of Belimo mechanism and fix it with self tapping screws NOTE Install the thermal fuse in a place where it will ...

Page 56: ...tion plate with BE transition plate NOTE Pay attention to the position of indication cut on the BE transition plate 3 Insert the rubber plug into the opening for the thermal fuse Install the Belimo actuator and fasten it with screws 2 hexagon screws M6 x 55 4 Drill hole Ø 16 mm for the fuse of Belimo mechanism and fix it with self tapping screws NOTE Install the thermal fuse in a place where it wi...

Page 57: ...e 2 hex screws located on the transition board B unscrew them and rotate BE transition plate A 90 NOTE The direction of rotation of BE transition plate and the electric actuator must be the same 4 Fix the transition plate to the transition board and put the Belimo actuator back Test the operation of the damper blade B A 1 2 3 4 Video instruction https www youtube com watch v t54DTocVKDs feature yo...

Page 58: ...e at least one annual check of the damper After each intervention provide a systematic cleaning of dust and especially the solenoid and its movable plate Check the if the electrical terminals are tightened It is not permitted to alter the dampers in any way nor perform any changes except for the service procedures described in this manual to their structure without the manufac turer s consent Prov...

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