Vents VUT 600 PW EC User manual

VUT 600 PW EC
VUT 1000 PW EC
Heat recovery air handling unit
USER’S MANUAL

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2
Safety requirements 3
Introduction 4
Use 4
Delivery set 4
Designation key 4
Technical data 5
Unit design and operating logic 7
Mounting and set-up 8
Connection to power mains 12
Functional diagram 13
Maintenance 14
Fault handling 16
Storage and transportation rules 16
Manufacturer's warranty 17
Acceptance certicate 19
Seller information 19
Mounting certicate 19
Warranty card 19
CONTENTS
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.

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THE PRODUCT MUST BE DISPOSED SEPARATELY AT THE END OF ITS SERVICE LIFE.
DO NOT DISPOSE THE UNIT AS UNSORTED MUNICIPAL WASTE.
• 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. • 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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INTRODUCTION
This user’s manual includes technical description, operation, installation and mounting guidelines, technical data for the heat recovery air
handling unit VENTS VUT 600-1000 PW EC, hereinafter referred to as «the unit».
USE
DELIVERY SET
Name Number
Unit 1 item
User's manual 1 item
Control panel 1 item
Packing box 1 item
Service side
L - left
R - right
Motor type
EC - electronically commutated
Heater type
W - water heater
Unit type
VUT - ventilation with heat recovery
Mounting method
P - suspended mounting
Air capacity [m /h]
Control panel
_ - PU SENS 01 with a sensor display
A7 - PU JK 01 with an LCD display
VUT ХХХ P W ЕС - Х - X
3
DESIGNATION KEY
The unit is designed to ensure continuous mechanical air exchange in houses, offices, hotels, cafés, 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 supply 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).
Relative humidity of transported air must not exceed 80 % at an ambient temperature of +20 °C.
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.

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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 %.
In order to prevent condensation on the internal walls of the units, it is necessary that the surface temperature of the casing is 2-3 °C
higher than the dew point temperature of the transported air.
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.
OVERALL DIMENSIONS OF THE UNIT, MM
L1
ø 8
Ø D
B1B1 H
H1
L
B1B2
B3 B4
B
B5
Model
VUT 600 PW EC
VUT 1000 PW EC
Ø D 199 249
B 827 1350
B1 713 608
B2 623 522
B3 294 430
B4 345 655
B5 920 1444
H 283 317
L 1238 1346
L1 1286 1395
UNIT TECHNICAL DATA
Model VUT 600 PW EC VUT 1000 PW EC
Unit voltage [V /50-60 Hz] 1 ~ 230
Max. fan power [W] 270 400
Max. fan current [A] 1,6 2,26
Number of water heating coils 2 4
Total unit power [kW] 0,27 0,4
Total unit current [A] 1,6 2,26
Max. air capacity [m3/h] 600 1000
RPM 3060 2780
Sound pressure level at 3 m distance [dBA] 53 52
Max. transported air temperature [°C] from -25 up to +40
Casing material Aluzinc
Insulation 20 mm mineral wool
Filter: Extract lter G4
Supply lter G4(F7)
Connected air duct diameter [mm] Ø200 Ø250
Weight [kg] 77 98
Heat recovery eciency up to 90%
Heat exchanger type Counterow
Heat exchanger material Polystyrene

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PERFORMANCE CHARTS FOR THE WATER HEATER PARAMETERS OF THE UNIT
How to use water heater diagrams
System Parameters: Air flow = 400 m
3
/h. Outside air temperature =-20 °C. Water temperature (in/out) = 70/50 °C.
Supply air temperature. prolong the line of air flow (e.g., 400 m
3
/h) up to the point where it crosses the outside air temperature (blue curve, e.g. -20 °C); then draw a horizontal line from this point
to the left till crossing 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 (+23 °C).
Heating coil capacity. Prolong the line up to the point where it crosses the outside air temperature (e.g. -20 °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 (6.6 kW).
Water flow. Prolong the line down to water flow axis at the bottom of the graphic (0.105 l/s).
Water pressure drop. Draw the line from the point where the line crosses the black curve to the pressure drop axis. (8.5 kPa).
How to use water heater diagrams
Air Speed. Starting from 950 m
3
/h on the air flow scale draw a vertical line till the air speed axis which makes about 3.35 m/s.
Supply air temperature. Prolong the line up to the point where it crosses the outside air temperature (blue curve), e.g. -15 °C; then draw a horizontal line from this point to the left till crossing water
in/out temperature curve (90/70 °C). From this point draw a vertical line to the supply air temperature axis on top of the graphic (+23 °С).
Heating coil capacity. Prolong the line up to the point where it crosses the outside air temperature indicated as red curve (e.g., -15 °С) and draw a horizontal line from this point to the right to the
intersection of water in/out temperature curve (e.g., 90/70 °С). From this point draw a vertical line up to the scale of heating coil capacity (13.5 kW).
Water flow. Prolong the line down to water flow axis at the bottom of the graphic (0.14 l/s).
Water pressure drop. Draw the line from the point where line crosses the black curve to the pressure drop axis. (1.5 kPa).

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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.
Supply
Extract
Intake
Exhaust
Unit operating logic based on VUT 600 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(s) 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.
Heat exchanger
Supply fan
Control unit
Supply fan
Water heater
Dierential
pressure switch
Bypass
Extract fan
Supply lter
Unit design based on VUT 600 PW EC unit example

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MOUNTING AND SETUP
MINIMUM DISTANCE FOR ACCESSING THE UNIT
While mounting the unit provide enough space for its maintenance or repair work.
A - distance required for water
heater connection. The distance is se-
lected depending on the installation
conditions at the discretion of the in-
staller.
min 20мм
min B
A
Model
VUT 600 PW EC
VUT 1000 PW EC
min B, mm 850 800
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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M
12
2
35
6
1. Water heater
2. Shuto valves.
3. Circulation pump.
4. Bypass damper.
5. Boiler.
6. Heat medium regulating valve.
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
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.
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 out-
side 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.

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CONDENSATE DRAINAGE
The drain pan is equipped with two drain pipes for condensate removal outside the unit.
Connect the drain pipe, the U-trap (not included in the standard delivery set) and the sewage system with metal, plastic or rubber pipes.
While laying the hoses provide the slope downwards min. 3%. Fill the system with water prior to connecting it to power supply! During
operation the U-trap must always be lled with water. Provide free drainage for the condensed water, otherwise it is accumulated inside the
unit that may cause the equipment damage and condensate outow to the room.
The condensate drainage system is designed for normal operation in premises with air temperatures above 0 °C! If the expected ambient
air temperatures are below 0 °C the condensate drainage system must be equipped with heat insulation and pre-heating facilities.
min 3° Condensate
drain pipe
PipePipe
Sewage system
U-trap
The unit is available both in left- and right-handed modications for easy installation and providing minimum distances for access to the
unit.
SERVICE SIDES OF THE UNIT
supply air extract air
exhaust air
intake air
supply air
extract air
exhaust air
intake air
Right-handed modication Left-handed modication
Service side
Service side
(top view) (top view)
Water heater connection
Water heater connection
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-vi-
bration connectors are another alternative for dealing with resonance.

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DUCT HUMIDITY SENSOR MOUNTING AND CONNECTION
The HV1 duct humidity sensor is a special accessory and is purchased separately. Connect the contact socket of the humidity sensor to the
contact socket located inside of the heat recovery unit. After that x the sensor using the clamp and the holder in the air duct upstream of the heat
exchanger.
Humidity sensor
1. 2. 3.
DUCT HUMIDITY SENSOR CONNECTION
OUTDOOR TEMPERATURE SENSOR MOUNTING AND CONNECTION
The unit is supplied with an outdoor temperature sensor.
The outdoor temperature sensor mounting is as follows:
1. Remove two screws that retain the sensor cover.
2. Take o the sensor cover.
3. Install the sensor on the outer wall. The installation place must not be subjected to direct solar light.
4. Install the sensor cover back.
5. Connect the sensor to the X1 terminal block in compliance with the electric wiring diagram.
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CONNECTION TO POWER MAINS
Connect the unit to single-phase AC 230 V / 50 (60) Hz power mains by using the pre-wired power cord with the Euro Plug, pre-wired at
the factory.
Connect the unit to power mains through the external automatic circuit breaker with a magnetic trip integrated into the xed wiring sys-
tem with the rated current not below the rated current consumption (refer to the table on p. 6).
The terminal block with the pre-wired control unit is located inside the control unit compartment. To connect the power and the ground
cable route the cables through the airtight electric lead-in in the unit casing and connect these to the terminal block. The wiring diagram for
connection of the air handling unit to power supply is on the back side of the lid.
Design. Name Model Wire
Cooler DX cooler NO 2 х 0,75 mm2
DD1 Pump dry run protection relay NC 2 х 0,75 mm2
M4 Circulation pump of the heater max 0.3 kW 2 х 0,75 mm2
SM1 Supply air damper actuator LF230 2 х 0,75 mm2
SM2 Exhaust air damper actuator LF230 2 х 0,75 mm2
SM4 3-way valve actuator LR24 SR 2 х 0,75 mm2
PK1 Contact from re alarm panel NO 2 х 0,75 mm2
P1** Control panel 2 х 0,75 mm2
TE1 Intake air temperature sensor 2 х 0,75 mm2
1. The unit delivery set includes P1 and TE1 only.
2. ** - Max. connecting cable length is 20 m!
L
— ELECTRIC SHOCK HAZARD!
X1
N PE 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 2223
L N PE
L
M4
N PE
1 2 3 c nc N L N L c no c no
Gnd Gnd Out
+12V
B A
Gnd
+12V B A
E+
Gnd Out
E+
TE1P1
1
SM4
2 3
- + Y
1
SM1
2
N L
1
SM2
2
N L
1
DD1
21
PK1
Cooler
(no-contacts)
Power input
230 V AC
2
DISCONNECT THE POWER SUPPLY PRIOR TO ANY OPERATIONS WITH THE UNIT.
CONNECTION OF THE UNIT TO POWER MAINS IS ALLOWED BY A QUALIFIED
ELECTRICIAN WITH A WORK PERMIT FOR THE ELECTRIC UNITS UP TO 1000 V AFTER
CAREFUL READING OF THE PRESENT USER’S MANUAL. 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.

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FUNCTIONAL DIAGRAM
Outside
Power supply
12 V AC
230 V AC
24 V AC
Digital input (DI)
Digital output (DO)
Analogue output (AI)
Analogue output (AO)
RS485
TE1
TE2
D1 F1 F2
RK1
D2
M2 M1 TE4
TE3 М4
TE5
Q1
Indoor
HV1
P1
HV2TE6
SM3 SM4SM2 SM1
DD1
PD1 PD2
Designation Name
D1* Supply air damper.
D2* Exhaust air damper.
F1 Supply lter.
F2 Extract lter.
M1 Supply fan.
M2 Extract fan.
P1 Control panel.
Q1 Water heater.
HV1* Duct humidity sensor.
HV2 Indoor humidity sensor.
PD1 Dierential pressure switch supply lter clogging control.
PD2 Dierential pressure switch extract lter clogging control.
RK1 Plate heat exchanger.
SM1* Supply air damper actuator.
SM2* Exhaust air damper actuator.
SM3 Bypass damper electric actuator.
SM4* 3-way valve actuator.
TE1 Intake air temperature sensor.
TE2 Temperature sensor downstream of the heat exchanger.
TE3 Return heat medium temperature sensor.
TE4 Water heater freeze protection sensor.
TE5 Air temperature duct sensor.
TE6 Room air temperature sensor.
DD1* Pump dry run protection relay.
M4* Circulation pump of the water heater.
* - The appliances are not included in the delivery set, can be purchased
separately.

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MAINTENANCE
Maintenance operations of the unit are required 3-4 times per year. Maintenance includes general cleaning of the unit and the following op-
erations:
1. Filter maintenance (3-4 times per year).
Dirty lters increase air resistance in the system and reduce supply air volume. The lters require cleaning not less than 3-4 times per year.
Vacuum cleaning is allowed. After two consecutive cleanings lters must be replaced. For new lters contact your Seller.
Sequence of lter removal:
1. Disconnect the socket connector of the dierential pressure switches.
2. In the VUT 1000 PB EC, disconnect the silicone tube from the pressure switch nozzle (+) on the side of the control unit.
3. Remove the 5 screws and take the service panel o. Remove the panel with care.
4. Pull the lters until they slide o the guides.
Install the lters in the reverse order.
2. Heat exchanger inspection (once per year).
Some dust may accumulate on the heat exchanger block even in case of regular maintenance of the lters. To maintain the high heat recovery
eciency, regular cleaning is required. To clean the heat exchanger pull it out, ush the heat exchanger with warm detergent solution. After clean-
ing install the dry heat exchanger back to the unit.
Sequence of heat exchangers removal:
1. Disconnect the socket connector of the dierential pressure switches.
2. In the VUT 1000 PB EC, disconnect the silicone tube from the pressure switch nozzle (+) on the side of the control unit.
3. Remove the 5 screws and take the service panel o. Remove the panel with care.
4. Pull the rst heat exchanger and remove it from the unit.
5. Disconnect the contact socket on the bypass wall and remove the bypass.
6. Pull the second heat exchanger and remove it from the unit.
Install the heat exchangers in the reverse order.

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3. Fan inspection (once per year).
Even in case of regular maintenance of the lters, some dust may accumulate inside the fans and reduce the fan performance and supply air
ow.
Clean the lters with a vacuum cleaner, a soft cloth or brush. Do not use water, aggressive solvents or sharp objects as they may damage the
impeller.
Access to the fans is from the side of air ducts connections.
4. Condensate drainage inspection (once per year).
The condensate drainage (drain line) may get clogged by dirt and dust particles contained in the exhaust air. Check the drain line operation by
lling the drain pan under the unit with water, clean the U-trap and the drain line, if necessary.
5. Exhaust louvre shutters and intake diusers cleaning (as required).
Wash the diusers and the louvre shutters with warm detergent solution.
6. Supply air ow control (twice per year).
The supply duct grille may get clogged with leaves and other objects reducing the unit performance and supply air delivery. Check the supply
grille twice per year and clean it as required.
7. Ductwork system inspection (once in 5 years).
Even regular fullling of all the prescribed above maintenance operations may not completely prevent dirt accumulation in the air ducts which
reduces the unit capacity. Duct maintenance means regular cleaning or replacement.

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Problem Possible reasons Fault handling
The fan(s) do(es) no
start.
No power supply. Make sure the power supply line is connected correctly,
otherwise troubleshoot a connection error.
The motor is jammed, the impeller blades are
soiled.
Turn the unit o. Troubleshoot the motor jam and the
impeller clogging. Clean the blades. Restart the unit.
Alarm in the system. For troubleshooting of the control system errors refer to the
control panel manual.
Automatic circuit
breaker tripping
following the unit
turning on.
Overcurrent resulted from short circuit in the
electric circuit. Turn the unit o. Contact the service centre.
Low air ow.
Low set fan speed. Set higher speed.
The lters and the fans are soiled, the heat
exchanger is soiled.
Clean or replace the lters. Clean the fans and the heat
exchanger.
The ventilation system components (air ducts,
diusers, louvre shutters, grilles) are soiled or
damaged.
Clean or replace the ventilation system components (air
ducts, diusers, louver shutters, grilles).
The air dampers, diusers or the louvre shutters
are closed.
Make sure that the air dampers, diusers or louver shutters
are fully opened.
Cold supply air.
The extract lter is soiled. Clean or replace the extract lter.
The heat exchanger is frozen.
Check the heat exchanger for freezing. Turn the unit o if
required and restart it after the freezing danger is no longer
imminent.
Malfunction of the water heater. Contact the service centre.
Noise, vibration.
The impeller(s) is soiled. Clean the impeller(s).
The screw connections are loose. Tighten the screw connection of the fans or the casing
against stop.
No anti-vibration connectors. Install anti-vibration connectors.
Water leakage. The drainage system is soiled, damaged or
arranged not correctly.
Clean the drain line. Check the drain line slope angle. Make
sure that the U-trap is lled with water and the drain pipes
are frost protected.
FAULT HANDLING
STORAGE AND TRANSPORTATION RULES
• 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 operation temperature for at
least 3-4 hours.

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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 Council Directive 2014/30/EU, Low Voltage Directive
2014/35/EU and CE-marking 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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ACCEPTANCE CERTIFICATE
MOUNTING CERTIFICATE
SELLER INFORMATION
WARRANTY CARD
Unit Type Heat recovery air handling unit
Seller’s Stamp
Model VUT ________ PW EC
Serial Number
Manufacture Date
Purchase Date
Warranty Period
Seller
Unit Type Heat recovery air handling unit
Model VUT ________ PW EC
Serial Number
Manufacture Date
Quality Inspector’s
Stamp
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
The VUT ________ PW EC unit has been connected to power mains pursuant to the requirements
stated in the present user’s manual.
Installation Stamp
Seller
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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V49EN-09