Vents VUT 2000 PBW EC User manual

VUT 2000 PBW EC
VUT 3000 PBW EC
Heat and energy recovery air handling unit
USER'S MANUAL

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This user’s manual is a main operating document intended for technical, maintenance, and operating staff.
Themanualcontainsinformationaboutpurpose,technicaldetails,operatingprinciple,design,andinstallationoftheVUT2000/3000PBWEC
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.
Safety requirements..................................................................................................................................................................... 3
Purpose................................................................................................................................................................................................ 5
Delivery set........................................................................................................................................................................................ 5
Designation key.............................................................................................................................................................................. 5
Technical data.................................................................................................................................................................................. 6
Design and functioning ............................................................................................................................................................ 8
Mounting and set-up.................................................................................................................................................................. 9
Connection to power mains .................................................................................................................................................. 12
Technical maintenance.............................................................................................................................................................. 13
Troubleshooting............................................................................................................................................................................. 15
Storage and transportation regulations.......................................................................................................................... 15
Manufacturer’s warranty........................................................................................................................................................... 16
Certificate of acceptance.......................................................................................................................................................... 17
Seller information.......................................................................................................................................................................... 17
Installation certificate.................................................................................................................................................................. 17
Warranty card................................................................................................................................................................................... 17
CONTENTS

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VUT 2000/3000 PBW EC
SAFETY REQUIREMENTS
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.
Disconnect the unit from the power supply prior to any connection, servicing, maintenance, and
repair operations.
Only qualied electricians with a work permit for electrical units up to 1000 V are
allowed for installation. The present user’s manual should be carefully read before
beginning works.
Check the unit for any visible damage of the impeller, the casing, and the grille before starting
installation. The casing internals must be free of any foreign objects that can damage the
impeller blades.
While mounting the unit, avoid compression of the casing! Deformation of the casing may result
in motor jam and excessive noise.
Misuse of the unit and any unauthorised modifications are not allowed.
Do not expose the unit to adverse atmospheric agents (rain, sun, etc.).
Transported air must not contain any dust or other solid impurities, sticky substances, or fibrous
materials.
Do not use the unit in a hazardous or explosive environment containing spirits, gasoline,
insecticides, etc.
Do not close or block the intake or extract vents in order to ensure the efficient air flow.
Do not sit on the unit and do not put objects on it.
The information in this user’s manual was 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.
Never touch the unit with wet or damp hands.
Never touch the unit when barefoot.
This unit is not intended for use by persons (including children) with reduced physical, sensory
or mental capabilities, or lack of experience and knowledge, unless they have been given
supervision or instruction concerning use of the unit by a person responsible for their safety.
Children should be supervised to ensure that they do not play with the unit.

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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.
Connection to the mains must be made through a disconnecting device, which is integrated
into the fixed wiring system in accordance with the wiring rules for design of electrical units,
and has a contact separation in all poles that allows for full disconnection under overvoltage
category III conditions.
If the supply cord is damaged, it must be replaced by the manufacturer, its service agent, or
similarly qualified persons in order to avoid a safety hazard.
CAUTION: In order to avoid a safety hazard due to inadvertent resetting of the thermal cut-
out, this unit must not be supplied through an external switching device, such as a timer, or
connected to a circuit that is regularly switched on and off by the utility.
Ensure that the unit is switched off from the supply mains before removing the guard.
WARNING: If there are any unusual oscillating movements, immediately stop using the unit and
contact the manufacturer, its service agent or suitably qualified persons.
The replacement of parts of the safety suspension system device shall be performed by the
manufacturer, its service agent or suitably qualified persons.
Fixing means for attachment to the ceiling such as hooks or other devices shall be fixed with a
sufficient strength to withstand 4 times the weight of the appliance.
The mounting of the suspension system shall be performed by the manufacturer, its service
agent or suitably qualified persons.
The appliance is to be installed so that the blades are more than 2.3m above the floor.
Precautions must be taken to avoid the back-flow of gases into the room from the open flue of
gas or other fuel-burning appliances.

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VUT 2000/3000 PBW EC
The unit is designed to ensure continuous mechanical air exchange in houses, offices, hotels, cafes, conference halls, and other utility
and public spaces as well as to recover the heat energy contained in the air extracted from the premises to warm up the filtered stream
of intake air.
The unit is not intended for organizing ventilation in swimming pools, saunas, greenhouses, summer gardens, and other spaces with
high humidity.
Due to the ability to save heating energy by means of energy recovery, the unit is an important element of energy-efficient premises.
The unit is a component part and is not designed for stand-alone operation. It 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).
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.
Name Number
Unit 1 pc.
User's manual 1 pc.
Packing box 1 pc.
VUT 2000 P B W EC A21 DTV
Dierential pressure switch
_ — no
DTV – pre-installed
Controller
A21
Motor type
EC – electronically commutated
Heater type
W – water heater
Additional components
B – bypass
Mounting method
P – suspended mounting
Rated air ow [m3/h]
Series of units
VUT – heat recovery air handling unit
DELIVERY SET
DESIGNATION KEY
PURPOSE

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VUT 2000/3000 PBW EC
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TECHNICAL DATA
The unit is designed for indoor application with the ambient temperature ranging from +1 °C up to +40 °C and relative humidity up to
60 % without condensation. In cold, damp rooms, there is a possibility of freezing or condensation inside and outside the casing.
In order to prevent condensation on the internal walls of the unit, it is necessary that the surface temperature of the casing is 2-3 °C above
the dew point temperature of the transported air.
The unit should be operated continuously, and in cases where ventilation is not necessary, reduce the air flow of the fans to a minimum
(20%). This will ensure a favorable indoor climate and reduce the amount of condensation inside the unit, which can damage electronic
components. Never use the unit for dehumidification, for example, of new buildings.
The unit is rated as a Class I electrical appliance.
Hazardous parts access and water ingress protection rating:
IP22 for the unit connected to the air ducts
IP44 for the unit motors
The unit design is constantly being improved, thus some models may be slightly different from those described in this manual.
TECHNICAL DATA
MODEL VUT 2000 PBW EC VUT 3000 PBW EC
Supply voltage, 50 (60) Hz [V] 1~ 230 3~ 400
Maximum fan power [W] 876 2226
Number of water heater rows 2 2
Maximum unit current [A] 5.3 3.5
Maximum air flow [m3/h] 2100 4300
RPM [min-1] 2920 3400
Sound pressure level at 3 m distance [dBA] 36 46
Transported air temperature [°C] -25...+40
Casing material Aluzinc
Insulation, mineral wool [mm] 25
Filtering class of the extract filter G4
Filtering class of the supply filter G4
Connected air duct diameter [mm] 315 400
Weight [kg] 140 268
Heat recovery efficiency [%] 50...67 59...72
Heat exchanger type Cross-flow
Heat exchanger material Aluminium
SEC class NRVU NRVU

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VUT 2000/3000 PBW EC
OVERALL DIMENSIONS OF THE UNIT
L1
ØD
Ød
L
HH2
H1
B
B2
B3
B2
B1
B1
Dimensions [mm]
Model Ø D В В1 В2 ВЗ Н Н1 Н2 L L1 Ø d
VUT 2000 PBW EC 315 950 405 225 500 762 367 501 1400 1453 9
VUT 3000 PBW EC 400 1265 563 347 570 881 427 300 1835 1888 9

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VUT 2000/3000 PBW EC
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Warm stale extract air from the room flows into the unit, where it is filtered by the extract filter, then air flows through the heat exchanger
and is exhausted outside by the extract fan.
Clean cold air from outside is moved to the supply filter. Then filtered air flows through the heat exchanger and is moved to the room
with the supply fan.
Heat energy of warm extract air is transferred to clean intake fresh air from outside and warms it up.
Heat recovery minimizes thermal energy losses and space heating expenses in cold seasons.
The unit is equipped with a detachable service panel for repair and maintenance operations and a cover enabling access to the control
system components.
OPERATING LOGIC
Extract air
Supply air
Intake air
Exhaust air
The basic unit delivery set includes a control panel for connection to the control system inside the unit casing using a data cable.
The unit is equipped with supply and extract centrifugal single-inlet fans with backward curved blades; maintenance-free EC motors with
an external rotor and a built-in overheating protection; a plate counterflow heat exchanger and a water heater.
The supply G4 filter cleans supply air flow and prevents contamination of the unit parts.
The extract G4 filter prevents contamination of the unit components.
Some condensate may form during heat recovery. The condensate is collected in the drain pan and is removed from the unit through
the drain pipes.
DESIGN
Extract fan
Supply filter
Extract filter
Control unit
Heat exchanger
Drain pan
Bypass
Electric heater
Supply fan
DESIGN AND OPERATING PRINCIPLE

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VUT 2000/3000 PBW EC
While mounting the unit provide enough space for its maintenance or repair work.
MINIMUM DISTANCE FOR ACCESSING THE UNIT
Minimum distance required to access
the unit
Control unit
Type VUT 2000 PBW EC VUT 3000 PBW EC
min А, mm 500 850
The distance is selected depending on the installation conditions at the discretion of the installer.
UNIT INSTALLATION
The unit must be suspended to the ceiling on the threaded rod that is fixed inside a dowel.
Example
Nut
Washer
Vibration-
absorbing
rubber
Nut and
lock-nut
To attain the best performance of the unit and to minimise turbulence-induced air pressure losses, connect a straight air duct section on
both sides of the unit while mounting.
Minimum straight air duct length:
• equal to 1 air duct diameter on the intake side
• equal to 3 air duct diameters on the outlet side
If the air ducts are too short or not connected, protect the unit parts from ingress of foreign objects, e.g. by covering the spigots with a
protecting grille or other protecting device with mesh width not more than 12.5 mm to prevent uncontrollable access to the fans.
MOUNTING AND SETUP
READ THE USER'S MANUAL BEFORE INSTALLING THE UNIT.

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WATER HEATER CONNECTION
In order to attain maximum power the water heater should be counterflow connected.
In case of the direct-flow connection, the water heater has lower power but higher frost-resistant properties.
Mixing unit diagram (not included in the delivery set) of the water heater is shown in the following figure.
Direct ow connection
Water inlet
Water outlet
Water outlet
Water inlet
Counterow connection
MIXING UNIT DIAGRAM
M
12
2
35
6
4
789
1. Water heater
2. Shutoff valves
3. Circulation pump
4. Bypass damper
5. Boiler
6. Regulating valve of the
heater with an actuator
7. Non-return valve
8. Coarse filter
9. Water pressure sensor (nc).
HEAT MEDIUM REGULATING VALVE ACTUATOR
Caution!
The unit operates in two modes: Winter and Summer.
The Winter mode is activated at outdoor temperature below +10 °C.
At higher outdoor temperature the unit operates in Summer mode.
In Summer mode the unit operates regardless of the return heat medium temperature in the mixing unit.
In Winter mode the unit has following temperature limits: the unit will not be turned on at a return heat medium temperature below
+40 °C.
When the return heat medium temperature reaches +40 °С and higher, the unit will turn on with a delay of 90 seconds.
The unit turns off when the return heat medium temperature falls below +20 °C.