Vents VK Series User manual

VK
Centrifugal fan
USER'S MANUAL

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CONTENTS
Contents.............................................................................................................................................................................................. 2
Safety requirements..................................................................................................................................................................... 3
Purpose................................................................................................................................................................................................ 5
Delivery set........................................................................................................................................................................................ 5
Designation key.............................................................................................................................................................................. 5
Technical data.................................................................................................................................................................................. 6
Design and operating principle ........................................................................................................................................... 7
Mounting and set-up.................................................................................................................................................................. 8
Connection to power mains .................................................................................................................................................. 9
Technical maintenance.............................................................................................................................................................. 10
Storage and transportation regulations.......................................................................................................................... 10
Manufacturer’s warranty........................................................................................................................................................... 11
Certificate of acceptance ........................................................................................................................................................ 12
Seller information.......................................................................................................................................................................... 12
Installation certificate.................................................................................................................................................................. 12
Warranty card ................................................................................................................................................................................. 12
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 VK 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.
The information in this user’s manual is correct at the time of the document’s preparation.
The Company reserves the right to modify the technical characteristics, design, or configuration of its products at any time in order to
incorporate the latest technological developments.
No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in any form or by any means in any information
search system or translated into any language in any form without the prior written permission of the Company.

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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.

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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.
• Do not allow children to
operate the unit.
• 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.
• 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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DELIVERY SET
DESIGNATION KEY
PURPOSE
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 UNAUTHORIZED
ACCESS BY UNATTENDED CHILDREN.
The product described herein is a centrifugal inline fan for supply or exhaust ventilation of premises.
The fan is designed for connection to ø 100, 125, 150, 200, 250 and 315 mm air ducts.
A model with a duct diameter of 150 mm can be mounted in a duct with a diameter of 150 or 160 mm.
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).
Name Number
Fan 1 pc.
Screws and dowels 4 pc.
Mounting bracket 2 pc.
User’s manual 1 pc.
Packing box 1 pc.
VK S100 X
Additional options
Q: low-power motor.
Duo: double-speed motor.
U: speed controller with an electronic thermostat and an integrated temperature sensor.
Temperature-based operation logic
U1: speed controller with an electronic thermostat and an integrated temperature sensor.
Timer-based operation logic
Un: speed controller with an electronic thermostat and an external temperature sensor fixed on a
4-meter cable. Temperature-based operation logic
U1n: speed controller with an electronic thermostat and an external temperature sensor fixed on a
4-meter cable. Timer-based operation logic
U2: speed controller with an electronic thermostat and an integrated temperature sensor.
Temperature-based switching on/off
U2n: speed controller with an electronic thermostat and an external temperature sensor fixed on a
4-meter cable. Temperature-based switching on/off
P: integrated smooth speed controller
V: built-in speed switch (for double-speed motors).
Air duct diameter [mm]
100; 125; 150; 200; 250; 315
Motor type
High-powered motor
Unit series
Centrifugal fan

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TECHNICAL DATA
The fan is designed for indoor application with the ambient temperature ranging from +1 °C up to +45 °C and relative humidity
up to 80 %. Hazardous parts access and water ingress protection rating IPX4.
The unit is rated as a class II electric appliance.
The unit design is constantly being improved, thus some models may be slightly different from those described in this manual.
Parameter VK 100 Q VK 100 VK 125 Q VK 125 VK 150
Voltage [V/50 Hz] 1~230
Power [W] 62 80 61 79 80
Current [A] 0.38 0.34 0.38 0.34 0.35
Maximum air flow [m3/h] 205 250 260 355 460
RPM [min-1] 2650 2820 2610 2800 2725
Maximum transported air temperature [°C] -25...+40
Ingress protection rating IPХ4
Parameter VK 200 VKS 200 VK 250 Q VK 250 VK 315 VKS 315
Voltage [V/50 Hz] 1~230
Power [W] 107 173 108 173 200 310
Current [A] 0.47 0.76 0.47 0.76 0.88 1.36
Maximum air flow [m3/h] 780 930 865 1080 1340 1700
RPM [min-1] 2660 2125 2560 2090 2655 2590
Maximum transported air temperature [°C] -25...+40
Ingress protection rating IPХ4
Parameter VK 100 Duo VK 125 Duo VK 150 Duo VK 200 Duo
Speed min max min max min max min max
Voltage [V/50 Hz] 1~230
Power [W] 45 57 45 58 46 59 83 95
Current [A] 0.21 0.25 0.21 0,26 0.22 0.26 0.37 0.43
Maximum air flow [m3/h] 157 264 191 329 264 445 430 741
RPM [min-1] 1820 2440 1810 2380 1805 2420 1920 2470
Maximum transported air temperature [°C] -25...+40
Ingress protection rating IPX4
Parameter VK 250 Duo VK 315 Duo
Speed min max min max
Voltage [V/50 Hz] 1~ 230 1~ 230
Power [W] 147 176 143 173
Current [A] 0.66 0.76 0.68 0.76
Maximum air flow [m3/h] 642 1126 758 1268
RPM [min-1] 1940 2370 1870 2410
Maximum transported air temperature [°C] -25...+40
Ingress protection rating IPX4

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DESIGN AND OPERATING PRINCIPLE
The fan is equipped with a single-phase motor with an external rotor, equipped with a centrifugal impeller. The Duo models are
supplied with a double-speed asynchronous motor.
The fan is rated for continuous operation.
Electronics operation algorithm
The VK U/U1/U2 fan is equipped with an electronic module TSC (speed controller with an electronic thermostat) for automatic speed
control (air flow) depending on the air temperature.
The terminal compartment incorporates 2 control knobs:
• presetting speed
• setting electric thermostat threshold value
The fan is equipped with two indicators:
• temperature sensor indicator (hereinafter referred to as TSI) - yellow colour
• motor control indicator (hereinafter referred to as MCI) - green/yellow colour
When the fan turns on, the TSI indicates the unit operation algorithm:
• one pulse - U
• two pulses - U1
• three pulses - U2
The MCI lights up in green when the motor rotates and in red when it stops (or rotates
very slowly).To set the thermostat threshold, rotate the thermostat control knob clockwise to increase or counter-clockwise to decrease
the temperature set point. To set the fan speed (air flow), rotate the speed control knob in the same way.
VK U: In this case, fan speed switching operations are rare.
The TSI lights up and the fan switches to the maximum speed as the room air temperature exceeds the set point.
As the air temperature drops 2 °C below the set point or if the initial temperature is below the set point, the TSI goes out and the fan
operates with the set speed.
VK U1: The speed switching operations are more frequent as compared to the temperature-based functioning logic (U), but one speed
interval continues at least 5 minutes.
The TSI lights up and the fan switches to the maximum speed as the room air temperature exceeds the set point.
As the air temperature drops down below the set point, the TSI starts blinking, the timer starts a 5-minute countdown and then the fan
switches to the set lower speed and the TSI goes out.
VK U2: The fan starts only at a certain air temperature.
The TSI lights up and the fan switches to the set speed as the room air temperature exceeds the set point.
As the air temperature drops 2 °C below the set point or if the initial temperature is below the set point, the TSI goes out and the fan
turns off.
1
2
3
4
5
1. Casing
2. Motor
3. Impeller
4. Mounting bracket
5. Terminal box
Overall dimensions of the unit [mm]
Model Dimensions [mm] Weight
[kg]
DD1 B L
VK 100 Q/VK 100/VK 100 Duo 100 250 270 230 2,01
VK 125 Q/VK 125/VK 125 Duo 125 250 270 220 2,2
VK 150/VK 150 Duo 150/160 300 310 286 2,45
VK 200/VK 200 Duo 200 340 354 276 3,0
VKS 200 200 340 354 276 4,3
VK 250 Q/VK 250/VK 250 Duo 250 340 354 265 4,3
VK 315/VK 315 Duo 315 400 414 276 4,85
VKS 315 315 400 414 276 4,85
min max
21
22
23
24
25 26
27
28
29
30°C20°C
Temperature regulator
Air flow regulator

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1 2
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Mounting sequence:
1. Remove the bolts on both sides of the casing, install the mounting brackets and tighten the bolts, aligning the holes in the brackets
with the holes in the casing.
2. Mark holes for drilling.
3. Drill the holes in the wall or the ceiling for dowels.
4. Fix the fan with the screws.
5. Connect the air ducts of the corresponding diameter to the fan.
MOUNTING AND SETUP
The fan is suitable both for horizontal or vertical mounting on the floor, on the wall or on the ceiling. Air motion in the system must
be in compliance with the direction of the arrow on the fan casing. Install a hood on the intake spigot side in case of vertical fan
installation. When installing the fan horizontally, provide a straight air duct section at least 1 m long on the intake spigot side.
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1 m
READ THE USER'S MANUAL BEFORE INSTALLING THE UNIT.
Temperature sensor failure
Alarm code Alarm description
Two short pulses Short circuit of the temperature sensor
One pulse Breakdown of the temperature sensor
The motor shuts down

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CONNECTION TO POWER MAINS
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.
X
N
L
QF
X
S
N
L
QF
N
L
N
L
WIRING DIAGRAM
• The unit is rated for connection to power mains with the parameters specified in the "Technical specifications” section, according to
the wiring diagram.
• The connection must be made using durable, insulated and heat-resistant conductors (cables, wires).
• The actual wire cross section selection must be based on the maximum load current, maximum conductor temperature depending
on the wire type, insulation, length and installation method.
• The external power input must be equipped with an automatic circuit breaker QF built into the stationary wiring to open the circuit
in the event of overload or short-circuit.
• The position of the external automatic circuit breaker must ensure free access for quick power-off of the unit.
• The trip current of the automatic circuit breaker must exceed the maximum current consumption of the unit (refer to the “Technical
data” section or to the unit label).
• The recommended trip current of the circuit breaker is the next current in the standard trip current row following the maximum
current of the connected unit.
• The circuit breaker is not included in the delivery set and can be ordered separately.
Designation:
L – line; N – neutral; QF – automatic circuit breaker; S – external switch (Diagrams 1, 2);
S – switch (Diagram 3); X – input terminal block
Diagram 1
Connection of the fan
to power mains
Diagram 2
Connection of the fan to power mains with an
external switch
WARNING! The fan is equipped with a thermal switch without self-resetting function.
To avoid a random restart of the thermal switch, the unit must not be powered through an external switching device, such as
a timer, or connected to power mains usually turned on/o by public services.
QF
N
L
N
L1
L2
X S
Diagram 3
Connection of the Duo fan
to power mains

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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 ˚С to +40 ˚С 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.
DISCONNECT THE UNIT FROM POWER SUPPLY BEFORE
ANY MAINTENANCE OPERATIONS!
TECHNICAL MAINTENANCE
Clean the product surfaces regularly (once in 6 months) from dust and dirt. To clean the fan, remove the self-tapping screws and
remove the fan cover. To clean the fan, use a soft cloth or a brush wetted in a mild detergent solution.
Do not allow water or liquid come into contact with electric components. Wipe the unit surfaces dry after cleaning.
Install the cover back in place and screw the self-tapping screws.
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1 2
3 4
5 6
WARNING! If the power cord is damaged, it must be replaced by the manufacturer, customer service, or similar qualied
personnel in order to avoid danger.

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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.
FOLLOWING THE REGULATIONS STIPULATED HEREIN WILL ENSURE A LONG AND
TROUBLEFREE OPERATION OF THE UNIT.
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.

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WARRANTY CARD
Unit Type Centrifugal fan
Seller’s Stamp
Model VK __________
Serial Number
Manufacture Date
Purchase Date
Warranty Period
Seller
CERTIFICATE OF ACCEPTANCE
Unit Type Centrifugal fan
Model VK __________
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 VK __________ 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:

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