Vents VUT 2000 PW EC User manual

VUT 2000 PW EC
VUT 3000 PW EC
USER’S MANUAL
Heat recovery
air handling unit

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2
Safety requirements 3
Introduction 5
Purpose 5
Delivery set 5
Designation key 5
Technical data 6
Unit design and operating logic 8
Mounting and set-up 9
Connection to power mains 13
Functional diagram 14
Technical maintenance 15
Fault handling 17
Storage and transportation rules 17
Manufacturer's warranty 18
Acceptance certicate 19
Seller information 19
Mounting certicate 19
Warranty card 20
CONTENTS

3
SAFETY REQUIREMENTS
• Read the user’s manual carefully prior to the operation and installation of the heat recovery air handling unit.
• Full the user’s manual requirements as well as the provisions of all the applicable local and national construction, electrical and
technical norms and standards.
• 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.
Symbol legend:
UNIT MOUNTING SAFETY PRECAUTIONS
WARNING!
DO NOT!
Disconnect the unit from power mains prior to
any installation or repair operations. The unit must be grounded!
The unit must not be operated outside the
temperature range stated in the user's manual
and in aggressive or explosive environments.
Do not use damaged equipment or cables when
connecting the unit to power mains.
While installing the unit follow the safety
regulations specic to the use of electric tools. Unpack the unit with care.
Do not change the power cable length at your
own discretion.
Do not bend the power cord.
Avoid damaging the power cord.
Do not position any heating devices or other
equipment in close proximity to the unit power
cable.

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Do not touch the unit controls with wet hands.
Do not carry out the unit maintenance with wet
hands.
Do not wash the unit with water.
Protect the unit electric parts from water ingress.
Use the unit only as intended by the
manufacturer.
Do not connect a clothes dryer or other similar
equipment to the unit or the ventilation system.
Do not put any water containers on the unit, i.e.
ower vases.
Do not sit on the unit and avoid placing foreign
objects on it.
OFF
ON
Disconnect the unit from power mains prior to
maintenance.
Do not let children operate the unit.
Do not damage the power cable while operating
the unit.
Do not put foreign objects on the power cable.
Keep combustible gases and inammable
products away of the unit. Do not open the operating unit.
When the unit generates unusual sounds, odour
or emits smoke disconnect it from power supply
and contact the Seller.
In case of continuous operation of the unit
periodically check the security of mounting.
Do not block the air duct when the unit is on. Do not let air ow from the unit be directed to the
open ame devices or candles.
UNIT OPERATION SAFETY PRECAUTIONS

5
INTRODUCTION
The user’s manual consisting of the technical details, operating instructions and technical specication applies to the installation and
mounting of the heat recovery air handling unit VENTS VUT 2000-3000 PW EC, hereinafter referred to as «the unit».
PURPOSE
THE UNIT MAY NOT BE OPERATED BY CHILDREN OR PERSONS WITH REDUCED PHYSICAL, MENTAL
OR SENSORY CAPACITIES, OR LACKING 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.
DELIVERY SET
Name Number
Unit 1 item
User's manual 1 item
Control panel 1 item
Packing box 1 item
Modication
L - left-handed modication
R - right-handed modication
Motor type
EC - electronically commutated motors
Heater type
W - water heater
Unit type
VUT - ventilation with heat recovery
Mounting method
P — suspended mounting
Air capacity [m3/h]
Control panel
__ — PU SENS 01 with a sensor display
А7 — PU JK 01 with an LCD display
VUT ХХХ PB ЕС - Х - X
DESIGNATION KEY
The unit with a heat exchanger and a water heater is designed to save heat energy by means of heat recovery and is one of the energy
saving components used in the buildings and premises. The unit is a component part and is not designed for independent operation.
The unit is designed to provide permanent controlled air exchange by means of mechanical ventilation in houses, oces, hotels, cafés,
meeting halls and other mechanically ventilated premises as well as utilization of extract air heat energy to warm up supply puried air.
The unit is designed for suspended mounting.
The unit is rated for continuous operation.
Transported air must not contain any ammable or explosive mixtures, evaporation of chemicals, sticky substances, brous materials,
coarse dust, soot and oil particles or environments favourable for the formation of hazardous substances (toxic substances, dust, pathogenic
germs).

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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 80%.
Hazardous parts access and water ingress protection rating:
IP 44 for the unit motors;
IP 22 for the assembled unit connected to the air ducts.
The unit design is constantly being improved, so some models can slightly dier from those ones described in this manual.
OVERALL DIMENSIONS OF THE UNIT, MM
Model VUT 2000 PW EC VUT 3000 PW EC
Ø D 314 399
B950 1265
B2 405 563
B3 225 347
B4 500 570
H761 881
H1 367 427
H2 501 300
L1400 1835
L1 1453 1888
UNIT TECHNICAL DATA
Model VUT 2000 PW EC VUT 3000 PW EC
Unit voltage [V /50-60 Hz] 1 ~ 230 3 ~ 400
Max. fan power [W] 2 items х 420 2 items х 990
Max. fan current [A] 2 items х 2,5 2 items х 1,7
Number of water heating coils 2 2
Total unit power [kW] 0,84 1,99
Total unit current [A] 5,0 3,4
Max. air capacity [m3/h] 1950 3800
RPM 2920 2580
Sound pressure level at 3 m distance [dB(A)] 58 59
Max. transported air temperature [°C] from -25 up to +40 from -25 up to +50
Casing material Aluzinc
Insulation 25 mm mineral wool
Filter: Extract lter G4
Supply lter G4
Connected air duct diameter [mm] Ø315 Ø400
Weight [kg] 194 295
Heat recovery eciency, % up to 75
Heat exchanger type Cross ow
Heat exchanger material Aluminium

7
PERFORMANCE CHARTS FOR THE WATER HEATER PARAMETERS OF THE UNIT
How to use water heater diagrams
System Parameters: Air flow = 1450 m3/h. Outside air temperature =-25 °C. Water temperature (in/out) = 70/50 °C.
Air Speed. Starting from 1450 m3/h on the air flow scale draw a vertical line till the air speed axis which makes about 3.2 m/s.
Supply air temperature. prolong the line up to the point where it crosses the outside air temperature (blue curve, e.g. -25 °C); then draw a horizontal line gnissorc llit tfel eht ot tniop siht morf
water in/out temperature curve (e.g. 70/50 °C). From this point draw a vertical line to the supply air temperature axis on top of the graphic (+28 °C).
Heating coil capacity. Prolong the line up to the point where it crosses the outside air temperature (e.g. -25 °C, red curve) and draw a horizontal line from this point to the right until it crosses
water in/out temperature curve (e.g., 70/50 °C), from here draw a vertical line up to the scale representing the heating coil capacity (31.0 kW).
Water flow. Prolong the line down to water flow axis at the bottom of the graphic (0.38 l/s).
Water pressure drop. Draw the line from the point where the line crosses the black curve to the pressure drop axis. (9.8 kPa).
How to use water heater diagrams
System Parameters: Air flow = 3500 m
3
/h. Outside air temperature =-10°C. Water temperature (in/out) = 90/70 °C.
Air Speed. Starting from 3500 m
3
/h on the air flow scale draw a vertical line till the air speed axis which makes about 4.65 m/s.
Supply air temperature. prolong the line up to the point where it crosses the outside air temperature (blue curve, e.g. -10 °C); then draw a horizontal line from this point to the left till crossing water
in/out temperature curve (e.g. 90/70 °C). From this point draw a vertical line to the supply air temperature axis on top of the graphic (+22,5 °C).
Heating coil capacity. Prolong the line up to the point where it crosses the outside air temperature (e.g. -10 °C, red curve) and draw a horizontal line from this point to the right until it crosses water
in/out temperature curve (e.g., 90/70 °C), from here draw a vertical line up to the scale representing the heating coil capacity (42.0 kW).
Water flow. Prolong the line down to water flow axis at the bottom of the graphic (0.5 l/s).
Water pressure drop. Draw the line from the point where the line crosses the black curve to the pressure drop axis. (6.5 kPa).
In order to attain maximum power the water heater should be counterow connected. In case of the direct-ow connection the water
heater has lower power but higher frost-resistant properties.

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UNIT DESIGN AND OPERATING LOGIC
The unit has the following operating logic:
Warm stale extract air from the room ows to the unit, where it is ltered, then air ows through the heat exchanger and is exhausted
outside by the extract fan. Clean cold air from outside is moved to the supply lter. Then ltered air ows 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.
INTAKE AIR
EXTRACT AIR
EXHAUST AIR
Extract fan
Supply fan
Water heater
Supply lter
Condensate drain pipe
Condensate drain pipe
Drain pan
Extract lter
Control unit
Bypass
Heat exchanger
Bypass damper electric actuator
SUPPLY AIR
UNIT OPERATING LOGIC TOP VIEW
BASED ON VUT 2000 PW EC UNIT EXAMPLE
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 a supply and an 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 counterow heat exchanger and a water heater.
The supply G4 lter cleans supply air ow and prevents contamination of the unit parts. The extract G4 lter 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.
The unit is equipped with a heat exchanger freeze protection. If the air temperature in the intake air duct is below +3°C, the bypass damper
opens and automatically controls the air temperature.

9
MOUNTING AND SETUP
MINIMUM DISTANCE FOR ACCESSING THE UNIT
While mounting the unit provide enough space for its maintenance or repair work.
— minimum distance for
condensate disposal arrangement. The
distance is selected depending on the
installation conditions at the discretion
of the installer.
B— minimum distance for water
heater connection and condensate
disposal arrangement. The distance is
selected depending on the installation
conditions at the discretion of the
installer.
— minimum distance from the
service panel to the oor.
VUT 2000 PW EC VUT 3000 PW EC
1000 mm 1300 mm
min 20 mm
B
A
min C
UNIT MOUNTING
The unit must be suspended to the ceiling on the threaded rod that is xed inside a dowel.
Washer
Nut
Vibration damping
rubber
Nut and
lock-nut
Example
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 intake side.
• equal to 3 air duct diameters on 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.

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10
M
12
2
35
6
1. Water heater.
2. Shuto valves.
3. Circulation pump.
4. Bypass damper.
5. Boiler.
6. Heat medium regulating valve
with an electric actuator.
7. Non-return valve.
8. Coarse lter.
9. Water pressure sensor (nc).
4
789
MIXING UNIT DIAGRAM
WATER HEATER CONNECTION
HEAT MEDIUM REGULATING VALVE ACTUATOR
water inlet
Water outlet
Water outlet
water inlet
Direct ow connection Counterow connection
Mixing unit diagram (not included in the delivery set) of the water heater is shown in the following gure.
WARNING!
The unit operates either in Winter or Summer mode. If the outside air temperature is below +10 °C the Winter mode is activated. If the
outside temperature accedes +10 °C 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 may not be started when the return heat medium temperature is below +40 °C. If the return heat medium temperature is +40 °C
and higher the unit will be turned on with a 90 seconds delay.
• The unit turns o when the return heat medium temperature falls below +20 °C.
Safety precautions:
The unit must be mounted to a rigid and stable structure.
The unit must be suspended using threaded rods. Before starting mounting check that the mounting structure has sucient loading capacity
for the unit weight. Otherwise reinforce the mounting location with beams or similar elements.
If the threaded rods used for the unit mounting are too short, the unit can generate abnormal noise resulting from resonance with the ceiling.
Use threaded rods of sucient length to prevent resonance.
If the abnormal noise is generated at the spiral air duct joint replace the spiral air duct with a exible one to prevent resonance. Flexible anti-
vibration connectors are another alternative for dealing with resonance.