Vents VCUN User manual

VCUN
USER’S MANUAL
Centrifugal fan in a scroll casing

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VCUN
www.ventilation-system.com
This user’s manual is a main operating document intended for technical, maintenance, and operating staff.
The manual contains information about purpose, technical details, operating principle, design, and installation of the VCUN unit and all
its modifications.
Technical and maintenance staff must have theoretical and practical training in the field of ventilation systems and should be able to
work in accordance with workplace safety rules as well as construction norms and standards applicable in the territory of the country.
CONTENTS
Safety requirements..................................................................................................................................................................... 3
Purpose................................................................................................................................................................................................ 4
Delivery set........................................................................................................................................................................................ 4
Designation key.............................................................................................................................................................................. 5
Technical data.................................................................................................................................................................................. 6
Design and operating principle ........................................................................................................................................... 11
Mounting and set-up.................................................................................................................................................................. 12
Connection to power mains .................................................................................................................................................. 13
Technical maintenance.............................................................................................................................................................. 14
Troubleshooting............................................................................................................................................................................. 15
Storage and transportation regulations.......................................................................................................................... 15
Manufacturer’s warranty........................................................................................................................................................... 16
Certificate of acceptance.......................................................................................................................................................... 17
Seller information.......................................................................................................................................................................... 17
Installation certificate.................................................................................................................................................................. 17
Warranty card................................................................................................................................................................................... 17

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SAFETY REQUIREMENTS
• Please read the user’s manual carefully prior to installing and operating the unit.
• All user’s manual requirements as well as the provisions of all the applicable local and national
construction, electrical, and technical norms and standards must be observed when installing
and operating the unit.
• The warnings contained in the user’s manual must be considered most seriously since they
contain vital personal safety information.
• Failure to follow the rules and safety precautions noted in this user’s manual may result in an
injury or unit damage.
• After a careful reading of the manual, keep it for the entire service life of the unit.
• While transferring the unit control, the user’s manual must be turned over to the receiving
operator.
UNIT INSTALLATION AND OPERATION SAFETY PRECAUTIONS
• Disconnect the unit from power mains prior to any installation operations.
• Unpack the unit with care.
• The unit must be grounded!
• While installing the unit, follow the safety regulations specific to the use of electric tools.
• Do not change the power cable length at your own discretion.
• Do not bend the power cable.
• Avoid damaging the power cable.
• Do not put any foreign objects on the power cable.
• Do not lay the power cable of the unit in close proximity to heating equipment.
• Do not use damaged equipment or cables when connecting the unit to power mains.
• Do not operate the unit outside the temperature range stated in the user’s manual.
• Do not operate the unit in aggressive or explosive environments.
• Do not touch the unit controls with wet hands.
• Do not carry out the installation and maintenance operations with wet hands.
• Do not wash the unit with water.
• Protect the electric parts of the unit against ingress of water.
• Do not allow children to operate the unit.
• The unit is allowed to be used by children aged from 8 years oldand above and persons with
reduced physical, sensory, or mental capabilities or no experience and knowledge provided
that they have been given supervision or instruction regarding safe use of the unit and
understand the risks involved.
• Disconnect the unit from power mains prior to any technical maintenance.
• Do not store any explosive or highly flammable substances in close proximity to the unit.
• When the unit generates unusual sounds, odour, or emits smoke, disconnect it from power
supply and contact the Seller.
• Do not open the unit during operation.
• Do not direct the air flow produced by the unit towards open flame or ignition sources.
• Do not block the air duct when the unit is switched on.

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VCUN
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THE PRODUCT MUST BE DISPOSED SEPARATELY AT THE END OF ITS SERVICE LIFE.
DO NOT DISPOSE THE UNIT AS UNSORTED DOMESTIC WASTE.
THE UNIT SHOULD NOT BE OPERATED BY CHILDREN OR PERSONS WITH REDUCED
PHYSICAL, MENTAL, OR SENSORY CAPACITIES, OR THOSE WITHOUT THE APPROPRIATE
TRAINING.
THE UNIT MUST BE INSTALLED AND CONNECTED ONLY BY PROPERLY QUALIFIED
PERSONNEL AFTER THE APPROPRIATE BRIEFING.
THE CHOICE OF UNIT INSTALLATION LOCATION MUST PREVENT UNAUTHORISED
ACCESS BY UNATTENDED CHILDREN.
PURPOSE
Centrifugal fans in a scroll casing are designed for supply and exhaust ventilation of domestic, public and industrial premises.
The unit is rated for continuous operation.
Transported air must not contain any flammable or explosive mixtures, evaporation of chemicals, sticky substances, fibrous materials,
coarse dust, soot and oil particles or environments favourable for the formation of hazardous substances (toxic substances, dust,
pathogenic germs).
DELIVERY SET
Name Number
Fan 1 pc.
User’s manual 1 pc.
Mounting bracket 1 pc.
Packing box 1 pc.
• In case of continuous operation of the unit, periodically check the security of mounting.
• Do not sit on the unit and avoid placing foreign objects on it.
• Use the unit only for its intended purpose.

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DESIGNATION KEY
VCUN 120x62 -0,25 -2 E L 0 T 400 V/50 Hz
Unit voltage
_: 230 V/50 Hz for single-phase motors
400 V/50 Hz: for three-phase motors
230/60 Hz: supply voltage 230 V, power frequency 60 Hz
400/60 Hz: supply voltage 400 V, power frequency 60 Hz
Options
_: model for temperate climate
T: model for tropical climate
M: model for marine climate
SW: sea-air resistant motor
Rotation angle of the casing
Casing design
R – right-hand
L – left-hand
Phases
_ – universal
E – single phase
D – three-phase
Pole number
Motor power [kW]
Impeller width [mm]
Impeller diameter [mm]
Unit designation
VCUN – centrifugal fan with an external motor

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VCUN
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NEVER TEST RUN OR OPERATE THE FAN, WHICH IS NOT CONNECTED TO THE
VENTILATION SYSTEM, IF THE AIR FLOW RATE AND THE CURRENT CONSUMPTION
EXCEED THE MAXIMUM VALUE FOR THE GIVEN STANDARD SIZE SEE TECHNICAL
PARAMETERS ON THE LABEL, AND IN THE ABSENCE OF THERMAL PROTECTION OF THE
MOTOR
TECHNICAL DATA
The fan is designed for ambient temperature ranging from +1 °C up to +40 °C and relative humidity up to 80 %.
The fan design is constantly being improved, thus some models may be slightly different from those described in this manual.
The unit is rated as a Class I electrical appliance.
Hazardous parts access and water ingress protection rating:
• for VCUN fans – IP55.

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Overall dimensions and position options of the VCUN fan casing
H
А
Е
F
В
K C
G
N
Q
a2
b2
a
b
PP
M
b1
a1
d2
d1
R
R
R
R R
R
R
RL
L
L
L L
L
L
L
POSSIBLE VARIANTS OF THE
VCUN FAN CASING POSITIONS
(View on the supply side)
Impeller rotation
rightwards
Impeller rotation
leftwards
Fan model
Dimensions [mm] Weight
[kg]
A B C E F G H K M N Q P a b a1 a2 b1 b2 d1 d2
VCUN 120х62-0,25-2D 329 211 192 82 103 306 175 93 174 191 268 120 93 86 123 145 145 135 8 7 7.3
VCUN 120х62-0,25-2E 329 211 192 82 103 306 175 93 174 191 268 120 93 86 123 145 145 135 8 7 7.3
VCUN 146х62-0,37-2D 385 249 220 100 118 345 203 102 174 191 293 135 114 96 141 165 165 149 8 7 9.7
VCUN 146х62-0,37-2E 385 249 220 100 118 345 203 102 174 191 293 135 114 96 141 165 165 149 8 7 10.2
VCUN 160х74-0,12-4D 414 275 192 109 132 335 215 120 179 201 305 135 125 112 156 180 180 166 8 9 7
VCUN 160х74-0,55-2D 414 275 220 109 132 362 215 120 179 201 305 135 125 112 156 180 180 166 8 9 7.7
VCUN 160х74-0,55-2E 414 275 220 109 132 362 215 120 179 201 305 135 125 112 156 180 180 166 8 9 8
VCUN 180х74-0,18-4D 455 304 192 123 143 339 235 123 199 221 345 150 141 116 171 195 195 170 8 9 8
VCUN 180х74-1,1-2D 455 304 237 123 143 383 235 123 199 221 345 150 141 116 171 195 195 170 8 9 16
VCUN 180х74-0,25-4E 455 304 220 123 143 366 235 123 199 221 345 150 141 116 171 195 195 170 8 9 9.5
VCUN 180х74-1,1-2E 455 304 237 123 143 383 235 123 199 221 345 150 141 116 171 195 195 170 8 9 16
VCUN 200х92-0,37-4D 507 334 220 137 155 389 265 146 220 246 400 175 157 138 187 211 211 192 8 11 10.5
VCUN 200х92-1,1-2D 507 334 236 137 155 405 265 146 220 246 400 175 157 138 187 211 211 192 8 11 17.5
VCUN 200х92-1,5-2D 507 334 254 137 155 423 265 146 220 246 400 175 157 138 187 211 211 192 8 11 24
VCUN 200х92-2,2-2D 507 334 279 137 155 448 265 146 220 246 400 175 157 138 187 211 211 192 8 11 28
VCUN 200х92-0,37-4E 507 334 220 137 155 389 265 146 220 246 400 175 157 138 187 211 211 192 8 11 11
VCUN 200х92-1,1-2E 507 334 236 137 155 405 265 146 220 246 400 175 157 138 187 211 211 192 8 11 18
VCUN 200х92-1,5-2E 507 334 254 137 155 423 265 146 220 246 400 175 157 138 187 211 211 192 8 11 24.5
VCUN 225х102-0,75-4D 598 376 236 154 175 428 324 165 254 290 446 200 177 157 211 241 241 221 8 13 19.9

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VCUN
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VCUN 225х102-2,2-2D 598 376 279 154 175 472 324 165 254 290 446 200 177 157 211 241 241 221 8 13 30.3
VCUN 225х102-3,0-2D 598 376 315 154 175 508 324 165 254 290 446 200 177 157 211 241 241 221 8 13 38.5
VCUN 225х102-0,75-4E 598 376 236 154 175 428 324 165 254 290 446 200 177 157 211 241 241 221 8 13 20.1
VCUN 250х102-0,37-6D 625 413 236 171 189 439 324 175 254 290 446 200 197 168 231 261 261 232 8 13 21
VCUN 250х102-1,1-4D 625 413 254 171 189 457 324 175 254 290 446 200 197 168 231 261 261 232 8 13 27
VCUN 250х102-3,0-2D 625 413 315 171 189 518 324 175 254 290 446 200 197 168 231 261 261 232 8 13 40
VCUN 250х102-4,0-2D 625 413 334 171 189 537 324 175 314 350 446 200 197 168 231 261 261 232 8 13 47
VCUN 250х102-5,5-2D 625 413 409 171 189 613 324 175 314 350 446 200 197 168 231 261 261 232 8 13 62
VCUN 250х102-1,1-4Е 625 413 254 171 189 457 324 175 254 290 446 200 197 168 231 261 261 232 8 13 27
VCUN 280х102-0,55-6D 698 463 236 191 213 444 364 180 254 290 446 200 220 171 255 285 285 237 10 13 23
VCUN 280х102-1,5-4D 698 463 279 191 213 487 364 180 254 290 446 200 220 171 255 285 285 237 10 13 33.5
VCUN 280х102-2,2-4D 698 463 334 191 213 542 364 180 314 350 446 200 220 171 255 285 285 237 10 13 41.5
VCUN 280х102-4,0-2D 698 463 408 191 213 617 364 180 314 350 446 200 220 171 255 285 285 237 10 13 49
VCUN 280х102-5,5-2D 698 463 408 191 213 617 364 180 314 350 446 200 220 171 255 285 285 237 10 13 64
VCUN 315х143-0,75-6D 789 520 254 215 239 518 412 231 314 350 557 240 248 221 288 323 323 297 12 13 39
VCUN 315х143-1,1-6D 789 520 279 215 239 542 412 231 314 350 557 240 248 221 288 323 323 297 12 13 43
VCUN 315х143-2,2-4D 789 520 333 215 239 598 412 231 314 350 557 240 248 221 288 323 323 297 12 13 51
VCUN 315х143-3,0-4D 789 520 333 215 239 598 412 231 314 350 557 240 248 221 288 323 323 297 12 13 52
VCUN 315х143-4,0-4D 789 520 333 215 239 598 412 231 314 350 557 240 248 221 288 323 323 297 12 13 58
VCUN 355х143-1,1-6D 882 579 279 242 262 550 462 239 314 350 557 240 280 228 320 355 355 304 12 13 48
VCUN 355х143-1,5-6D 882 579 315 242 262 587 462 239 314 350 557 240 280 228 320 355 355 304 12 13 55
VCUN 355х143-2,2-6D 882 579 408 242 262 680 462 239 314 350 557 240 280 228 320 355 355 304 12 13 62
VCUN 355х143-4,0-4D 882 579 408 242 262 680 462 239 314 350 557 240 280 228 320 355 355 304 12 13 63
VCUN 355х143-5,5-4D 882 579 408 242 262 680 462 239 314 350 557 240 280 228 320 355 355 304 12 13 76
VCUN 400х183-1,5-6D 990 655 315 273 298 635 522 287 376 420 685 310 316 276 355 390 390 352 12 15 67
VCUN 400х183-2,2-6D 990 655 333 273 298 653 522 287 376 420 685 310 316 276 355 390 390 352 12 15 74
VCUN 400х183-3,0-6D 990 655 408 273 298 728 522 287 376 420 685 310 316 276 355 390 390 352 12 15 88
VCUN 400х183-5,5-4D 990 655 408 273 298 728 522 287 376 420 685 310 316 276 355 390 390 352 12 15 90
VCUN 400х183-7,5-4D 990 655 408 273 298 728 522 287 376 420 685 310 316 276 355 390 390 352 12 15 100
VCUN 400х183-11,0-4D 990 655 487 273 298 807 522 287 466 510 820 375 316 276 355 390 390 352 12 15 153
VCUN 450х203-3,0-6D 1106 734 408 307 332 760 584 319 466 510 820 375 356 308 395 430 430 385 12 15 102.5
VCUN 450х203-4,0-6D 1106 734 408 307 332 760 584 319 466 510 820 375 356 308 395 430 430 385 12 15 114.5
VCUN 450х203-5,5-6D 1106 734 408 307 332 760 584 319 466 510 820 375 356 308 395 430 430 385 12 15 115
VCUN 450х203-7,5-4D 1106 734 408 307 332 760 584 319 466 510 820 375 356 308 395 430 430 385 12 15 118
VCUN 450х203-11,0-4D 1106 734 487 307 332 839 584 319 466 510 820 375 356 308 395 430 430 385 12 15 160
VCUN 450х203-15,0-4D 1106 734 532 307 332 884 584 319 466 510 820 375 356 308 395 430 430 385 12 15 173
VCUN 500х204-4,0-6D 1210 818 408 341 372 776 634 335 466 510 835 375 396 323 435 470 470 401 12 15 126
VCUN 500х204-5,5-6D 1210 818 408 341 372 776 634 335 466 510 835 375 396 323 435 470 470 401 12 15 130
VCUN 500х204-7,5-6D 1210 818 487 341 372 855 634 335 466 510 835 375 396 323 435 470 470 401 12 15 172

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VCUN 500х204-11,0-4D 1210 818 487 341 372 855 634 335 466 510 835 375 396 323 435 470 470 401 12 15 175
VCUN 500х204-15,0-4D 1210 818 532 341 372 915 634 335 466 510 835 375 396 323 435 470 470 401 12 15 185
VCUN 500х204-18,5-4D 1215 818 553 341 372 945 639 335 466 510 835 375 396 323 435 470 470 401 12 15 222
VCUN 500х204-22,0-4D 1215 818 591 341 372 983 639 335 504 554 920 400 396 323 435 470 470 401 12 18 255
VCUN 120х62-0,37-2D
(400V/60Hz)
329 211 192 82 103 306 175 93 174 191 268 120 93 86 123 145 145 135 8 7 7.5
VCUN 120х62-0,37-2E
(230V/60Hz)
329 211 220 82 103 335 175 93 174 191 268 120 93 86 123 145 145 135 8 7 9.3
VCUN 146х62-0,75-2D
(400V/60Hz)
385 249 220 100 118 345 203 102 174 191 293 135 114 96 141 165 165 149 8 7 10.2
VCUN 146х62-0,75-2E
(230V/60Hz)
385 249 237 100 118 378 203 102 199 221 345 150 114 96 141 165 165 149 8 9 15
VCUN 160х74-0,18-4D
(400V/60Hz)
414 275 192 109 132 335 215 120 179 201 305 135 125 112 156 180 180 166 8 9 7.2
VCUN 160х74-1,1-2D
(400V/60Hz)
414 275 237 109 132 379 215 120 199 221 345 150 125 112 156 180 180 166 8 9 15.5
VCUN 160х74-1,1-2E
(230V/60Hz)
414 275 237 109 132 379 215 120 199 221 345 150 125 112 156 180 180 166 8 9 16
VCUN 180х74-0,37-4D
(400V/60Hz)
455 304 220 123 143 366 235 123 199 221 345 150 141 116 171 195 195 170 8 9 9.5
VCUN 180х74-2,2-2D
(400V/60Hz)
455 304 280 123 143 433 235 123 220 246 400 175 141 116 171 195 195 170 8 9 27
VCUN 180х74-0,37-4E
(230V/60Hz)
455 304 220 123 143 366 235 123 199 221 345 150 141 116 171 195 195 170 8 9 9.5
VCUN 180х74-2,2-2E
(230V/60Hz)
455 304 280 123 143 433 235 123 220 26 400 175 141 116 171 195 195 170 8 11 27.5
VCUN 200х92-0,75-4D
(400V/60Hz)
507 334 236 137 155 405 265 146 220 246 400 175 157 138 187 211 211 192 8 11 18
VCUN 200х92-2,2-2D
(400V/60Hz)
507 334 279 137 155 448 265 146 220 246 400 175 157 138 187 211 211 192 8 11 28.5
VCUN 200х92-3,0-2D
(400V/60Hz)
507 334 279 137 155 448 265 146 220 246 400 175 157 138 187 211 211 192 8 11 30
VCUN 200х92-0,75-4E
(230V/60Hz)
507 334 236 137 155 405 265 146 220 246 400 175 157 138 187 211 211 192 8 11 19
VCUN 200х92-2,2-2E
(230V/60Hz)
507 334 279 137 155 448 265 146 220 246 400 175 157 138 187 211 211 192 8 11 30.5
VCUN 225х102-0,75-4D
(400V/60Hz)
598 376 236 154 175 428 324 165 254 290 446 200 177 157 211 241 241 221 8 13 20.5
VCUN 225х102-1,1-4D
(400V/60Hz)
598 376 236 154 175 428 324 165 254 290 446 200 177 157 211 241 241 221 8 13 21
VCUN 225х102-1,5-4D
(400V/60Hz)
598 376 279 154 175 472 324 165 254 290 446 200 177 157 211 241 241 221 8 13 30
VCUN 225х102-1,1-4E
(230V/60Hz)
598 376 279 154 175 472 324 165 254 290 446 200 177 157 211 241 241 221 8 13 30.5
VCUN 250х102-0,55-6D
(400V/60Hz)
625 413 236 171 189 439 324 175 254 290 446 200 197 168 231 261 261 232 8 13 22
VCUN 250х102-1,5-4D
(400V/60Hz)
625 413 279 171 189 482 324 175 254 290 446 200 197 168 231 261 261 232 8 13 32
VCUN 250х102-1,5-4E
(230V/60Hz)
625 413 279 171 189 482 324 175 254 290 446 200 197 168 231 261 261 232 8 13 32
VCUN 280х102-0,75-6D
(400V/60Hz)
698 463 236 191 213 444 364 180 254 290 446 200 220 171 255 285 285 237 10 13 23.5
VCUN 280х102-2,2-4D
(400V/60Hz)
698 463 334 191 213 542 364 180 314 350 446 200 220 171 255 285 285 237 10 13 41.5

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VCUN
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VCUN 280х102-3,0-4D
(400V/60Hz)
698 463 334 191 213 542 364 180 314 350 446 200 220 171 255 285 285 237 10 13 42.5
VCUN 315х143-1,1-6D
(400V/60Hz)
789 520 279 215 239 542 412 231 314 350 557 240 248 221 288 323 323 297 12 13 44
VCUN 315х143-1,5-6D
(400V/60Hz)
789 520 333 215 239 598 412 231 314 350 557 240 248 221 288 323 323 297 12 13 52
VCUN 315х143-3,0-4D
(400V/60Hz)
789 520 333 215 239 598 412 231 314 350 557 240 248 221 288 323 323 297 12 13 53
VCUN 315х143-4,0-4D
(400V/60Hz)
789 520 333 215 239 598 412 231 314 350 557 240 248 221 288 323 323 297 12 13 53
VCUN 315х143-5,5-4D
(400V/60Hz)
789 520 333 215 239 598 412 231 314 350 557 240 248 221 288 323 323 297 12 13 58
VCUN 355х143-1,5-6D
(400V/60Hz)
882 579 315 242 262 587 462 239 314 350 557 240 280 228 320 355 355 304 12 13 55
VCUN 355х143-2,2-6D
(400V/60Hz)
882 579 408 242 262 680 462 239 314 350 557 240 280 228 320 355 355 304 12 13 63
VCUN 355х143-3,0-6D
(400V/60Hz)
882 579 408 242 262 680 462 239 314 350 557 240 280 228 320 355 355 304 12 13 63
VCUN 355х143-5,5-4D
(400V/60Hz)
882 579 408 242 262 680 462 239 314 350 557 240 280 228 320 355 355 304 12 13 65
VCUN 355х143-7,5-4D
(400V/60Hz)
882 579 408 242 262 680 462 239 314 350 557 240 280 228 320 355 355 304 12 13 88
VCUN 400х183-3,0-6D
(400V/60Hz)
990 655 333 273 298 653 522 287 376 420 685 310 316 276 355 390 390 352 12 15 76
VCUN 400х183-4,0-6D
(400V/60Hz)
990 655 408 273 298 728 522 287 376 420 685 310 316 276 355 390 390 352 12 15 101
VCUN 400х183-5,5-6D
(400V/60Hz)
990 655 408 273 298 728 522 287 376 420 685 310 316 276 355 390 390 352 12 15 103
VCUN 450х203-5,5-6D
(400V/60Hz)
1106 734 408 307 332 760 584 319 466 510 820 375 356 308 395 430 430 385 12 15 115.5
VCUN 450х203-7,5-6D
(400V/60Hz)
1106 734 487 307 332 839 584 319 466 510 820 375 356 308 395 430 430 385 12 15 162
VCUN 450х203-11,0-6D
(400V/60Hz)
1106 734 532 307 332 884 584 319 466 510 820 375 356 308 395 430 430 385 12 15 175
VCUN 500х204-11,0-6D
(400V/60Hz)
1210 818 532 341 372 915 634 335 466 510 835 375 396 323 435 470 470 401 12 15 215
VCUN 500х204-15,0-6D
(400V/60Hz)
1215 818 591 341 372 983 639 335 504 554 920 400 396 323 435 470 470 401 12 18 270

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The VCUN fan consists of a metal casing, to which an electric motor and an inlet ring are attached through a flange.
The impeller is attached to the drive shaft.
A bracket for mounting the fan is attached to the bottom of the electric motor.
VCUN fans are available in right-hand and left-hand versions.
In the first case, the impeller rotates clockwise and in the second case, the impeller rotates counterclockwise, air intake side view.
DESIGN AND OPERATING PRINCIPLE
Impeller
Motor
Mounting
bracket
Casing
Terminal
box

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VCUN
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After installing the unit make sure that the fan impeller rotates freely.
Having unpacked the fan and prior to installation:
• Carefully read the instructions for installation, start-up, operation and maintenance of the fan.
• Make sure that the fan impeller rotates freely.
• Make sure there is no condensation on the motor.
• Check the electrical resistance of insulation between the motor windings and between each winding and the motor frame.
Follow the safety regulations during the make-ready procedures and fan operation.
VCUN fan installation sequence:
• Make sure that the fan is disconnected from power mains (Fig. 1).
• Drill holes and fix the bracket using appropriate fasteners (for example, dowels), if necessary, use VVCr or VVCp (optional) anti-
vibration connectors (Fig. 3).
• Ground the fan (Fig. 4).
• Connect the air ducts to the fan.
• On the air supply side, use a FVC-VCU, FVC-VCUN flange (optional) (Fig. 5) or install a RVC VCU, RVC-VCUN protective grille (Fig. 6).
MOUNTING AND SETUP
S1
PE
1. 2.
3. 4.
5. 6.

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POWER OFF THE POWER SUPPLY PRIOR TO ANY OPERATIONS WITH THE UNIT.
THE UNIT MUST BE CONNECTED TO POWER SUPPLY BY A QUALIFIED ELECTRICIAN.
THE RATED ELECTRICAL PARAMETERS OF THE UNIT ARE GIVEN ON THE
MANUFACTURER’S LABEL.
ANY TAMPERING WITH THE INTERNAL CONNECTIONS IS PROHIBITED
AND WILL VOID THE WARRANTY.
The VCUN fan is designed for connection to power mains with the parameters specified in the «Technical data» section.
The connection must be made using durable, insulated and heat-resistant conductors.
When selecting conductors, take into account the maximum permissible wire heating temperature, depending on the type of wire, its
insulation, length and method of laying - open, in cable ducts, inside the wall.
The external lead-in must be equipped with an automatic circuit breaker built into the stationary wiring.
The mounting position of the circuit breaker must ensure free access for quick power-off of the unit.
The circuit breaker rated current must correspond to the consumption current of the product (see technical data).
VCUN fan connection sequence:
• Check that there is no voltage on the supply cable.
• Remove the cover from the terminal box located on the motor casing.
• Pull the power supply wires through the cable gland located on the terminal box and strip 7-8 mm of insulation from the ends of the
wires.
• Connect the wires to the terminal block, following the wiring diagram and the terminal designations.
• Install the terminal box cover.
Air flow direction must be in compliance with the direction of the arrow on the fan casing.
To check if the rotation direction of the impeller is correct, briefly turn on the fan.
If the rotation direction is not as indicated, switch any two phases at the motor terminals by swapping the corresponding wires on the
terminal block in the terminal box.
CONNECTION TO POWER MAINS
Z2U1
U2
L
N
C
Z1
PEPE
Z2U1
U2
L
N
C
Z1
PEPE
U1
V1
W1
W2
U2
V2
L1
L2
L3
PE
U1
V1
W1
W2
U2
V2
L1
L2
L3
PE
U1
V1
W1
W2
U2
V2
L1
L2
L3
PE
U1
V1
W1
W2
U2
V2
L1
L2
L3
PE
Connection of the single-
phase motor 230 V, 50/60 Hz
Star connection of a three-phase motor
230/400 V, 50/60 Hz
Delta connection of a three-phase
motor 400/690 V, 50/60 Hz
auxiliary winding
main winding
black
white
white
red

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VCUN
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Prior to performing any technical maintenance and repair disconnect the fan from power mains and wait until its rotating parts come to
a complete stop. The technical maintenance includes periodic cleaning of the surfaces from accumulated dust and dirt.
The impeller blades require thorough cleaning once in 6 months.
Connection sequence:
• Cut off power supply to the fan.
• Provide access to the impeller blades.
• For the VCUN fan – unscrew the screws and remove the ring.
• Clean the impeller blades with a dry soft brush or compressed air.
• If the fan is heavily soiled, wet cleaning is recommended.
• To clean the impeller blades, use a soft cloth wetted in a mild detergent solution.
• Avoid liquid dripping on the motor.
Perform all the above operations in the reverse order after cleaning.
TECHNICAL MAINTENANCE
1. 2.
S1
PE
Maintenance checklist
Service the fan regularly to ensure reliable, safe and efficient operation.
General maintenance includes:
• Daily technical maintenance (DTM).
• Technical maintenance (TM-1) after 1000 hours.
• Current repair (CR) after 10 000 hours.
• Overhaul (O) after 20 000 hours. All types of work should be performed according to the schedule, regardless of the technical condition
of the fan. A DTM is performed by a locksmith of the 4th or 5th category. A CR and Oare performed by a locksmith and an electrician
for the repair and operation of equipment.
DTM:
• Check the tightening of the bolts.
• Check the reliability of the grounding.
• Check the absence of unwanted sounds.
TM-1:
• Carry out the DTM operations.
• Eliminate malfunctions of bolted and welded joints.
• Check the clearance between the impeller and the air distribution box.
R:
• Carry out the TM-1 operations.
• Clean the casing and impeller from dirt.
O:
• Disconnect the air ducts.
• Carry out per-unit disassembly.
• Carry out per-unit assembly from new or repaired parts.
• Check the grease in the bearings, carry out adjustments, tests.

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TROUBLESHOOTING
Problem Possible reasons Troubleshooting
The fan does not start.
No power supply.
Make sure that the unit is properly
connected to the power mains and make
any corrections, if necessary.
Jammed motor.
Turn off the fan.
Troubleshoot the motor jamming.
Restart the fan.
Circuit breaker tripping
during the fan start.
Excessive electric current consumption
caused by a short circuit.
Turn off the fan.
Contact the Seller.
Noise, vibration.
The fan impeller is soiled. Clean the impellers.
The screw connection is loose. Check the screw connection and tighten
the screws if needed.
Resonance with the mounting structure. Use VVCr and VVCp vibration dampers
recommended for your fan model.
STORAGE AND TRANSPORTATION REGULATIONS
• Store the unit in the manufacturer’s original packaging box in a dry closed ventilated premise with temperature range
from +5 °C to + 40 °C and relative humidity up to 70 %.
• Storage environment must not contain aggressive vapors and chemical mixtures provoking corrosion, insulation, and sealing
deformation.
• Use suitable hoist machinery for handling and storage operations to prevent possible damage to the unit.
• Follow the handling requirements applicable for the particular type of cargo.
• The unit can be carried in the original packaging by any mode of transport provided proper protection against precipitation and
mechanical damage. The unit must be transported only in the working position.
• Avoid sharp blows, scratches, or rough handling during loading and unloading.
• Prior to the initial power-up after transportation at low temperatures, allow the unit to warm up at operating temperature for at least
3-4 hours.

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USER’S WARRANTY CLAIMS SHALL BE SUBJECT TO REVIEW ONLY UPON PRESENTATION
OF THE UNIT, THE PAYMENT DOCUMENT AND THE USER’S MANUAL WITH THE
PURCHASE DATE STAMP.
FOLLOWING THE REGULATIONS STIPULATED HEREIN WILL ENSURE A LONG AND
TROUBLEFREE OPERATION OF THE UNIT.
MANUFACTURER’S WARRANTY
The product is in compliance with EU norms and standards on low voltage guidelines and electromagnetic compatibility. We hereby
declare that the product complies with the provisions of Electromagnetic Compatibility (EMC) Directive 2014/30/EU of the European
Parliament and of the Council, Low Voltage Directive (LVD) 2014/35/EU of the European Parliament and of the Council and CE-marking
Council Directive 93/68/EEC. This certificate is issued following test carried out on samples of the product referred to above.
The manufacturer hereby warrants normal operation of the unit for 24 months after the retail sale date provided the user's observance
of the transportation, storage, installation, and operation regulations. Should any malfunctions occur in the course of the unit operation
through the Manufacturer's fault during the guaranteed period of operation, the user is entitled to get all the faults eliminated by the
manufacturer by means of warranty repair at the factory free of charge. The warranty repair includes work specific to elimination of faults
in the unit operation to ensure its intended use by the user within the guaranteed period of operation. The faults are eliminated by means
of replacement or repair of the unit components or a specific part of such unit component.
The warranty repair does not include:
• routine technical maintenance
• unit installation/dismantling
• unit setup
To benefit from warranty repair, the user must provide the unit, the user's manual with the purchase date stamp, and the payment
paperwork certifying the purchase. The unit model must comply with the one stated in the user’s manual. Contact the Seller for warranty
service.
The manufacturer’s warranty does not apply to the following cases:
• User’s failure to submit the unit with the entire delivery package as stated in the user’s manual including submission with missing
component parts previously dismounted by the user.
• Mismatch of the unit model and the brand name with the information stated on the unit packaging and in the user's manual.
• User’s failure to ensure timely technical maintenance of the unit.
• External damage to the unit casing (excluding external modifications as required for installation) and internal components caused
by the user.
• Redesign or engineering changes to the unit.
• Replacement and use of any assemblies, parts and components not approved by the manufacturer.
• Unit misuse.
• Violation of the unit installation regulations by the user.
• Violation of the unit control regulations by the user.
• Unit connection to power mains with a voltage different from the one stated in the user's manual.
• Unit breakdown due to voltage surges in power mains.
• Discretionary repair of the unit by the user.
• Unit repair by any persons without the manufacturer’s authorization.
• Expiration of the unit warranty period.
• Violation of the unit transportation regulations by the user.
• Violation of the unit storage regulations by the user.
• Wrongful actions against the unit committed by third parties.
• Unit breakdown due to circumstances of insuperable force (fire, flood, earthquake, war, hostilities of any kind, blockades).
• Missing seals if provided by the user’s manual.
• Failure to submit the user’s manual with the unit purchase date stamp.
• Missing payment paperwork certifying the unit purchase.

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CERTIFICATE OF ACCEPTANCE
Unit Type Centrifugal fan in a scroll casing
Model VCUN ___________________
Serial Number
Manufacture Date
Quality Inspector’s
Stamp
SELLER INFORMATION
Seller
Seller’s Stamp
Address
Phone Number
E-mail
Purchase Date
This is to certify acceptance of the complete unit delivery with the user’s manual. The warranty terms are
acknowledged and accepted.
Customer’s Signature
INSTALLATION CERTIFICATE
The VCUN ___________________ unit is installed pursuant to the requirements stated in the present
user's manual.
Installation Stamp
Company name
Address
Phone Number
Installation
Technician’s Full Name
Installation Date: Signature:
The unit has been installed in accordance with the provisions of all the applicable local and national construction,
electrical and technical codes and standards. The unit operates normally as intended by the manufacturer.
Signature:
WARRANTY CARD
Unit Type Centrifugal fan in a scroll casing
Seller’s Stamp
Model VCUN ___________________
Serial Number
Manufacture Date
Purchase Date
Warranty Period
Seller

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V16-1EN-01