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 5
Use 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 (hereinafter referred to
as «the unit»).
• Full the operation manual requirements as well as the provisions of all the applicable local and national construction, electrical and
technical codes 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 safety requirements may result in an injury or unit damage.
• Read the manual carefully and keep it as long as you use the unit.
• While transferring the unit control the user’s manual must be turned over to the receiving operator.
Symbol legend used in the manual:
UNIT MOUNTING SAFETY PRECAUTIONS
WARNING!
DO NOT!
The unit must be disconnected from power supply
prior to any installation or repair operations. The unit must be grounded!
The unit must not be operated outside the tem-
perature range stated in the user's manual and in
aggressive or explosive environments.
Do not use damaged equipment or conductors to
connect 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 cable. Avoid damaging
the power cable.
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 manufac-
turer.
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 do not put any objects
on it.
OFF
ON
Disconnect the unit from power supply prior to
maintenance.
Do not let children operate the unit.
Do not damage the power cable while operating
the unit.
Do not put any objects on the power cable.
Keep combustible gases and inammable prod-
ucts away from the unit. Do not open the operating unit.
In case of unusual sounds, smell of smoke discon-
nect the unit from power supply and contact the
service centre.
During a long-term operation of the unit periodi-
cally check the mounting for reliability.
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
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
THE UNIT IS NOT INTENDED TO BE USED BY CHILDREN, PHYSICALLY OR MENTALLY DISABLED PER
SONS, PERSONS WITH SENSORY DISORDER, PERSONS WITH NO APPROPRIATE QUALIFICATION.
ALL OPERATIONS WITH THE UNIT MUST BE PERFORMED ONLY BY PROPERLY QUALIFIED PERSON
NEL AFTER THE APPROPRIATE SAFETY BRIEFING.
THE UNIT INSTALLATION SITES MUST PREVENT ACCESS BY UNATTENDED CHILDREN.
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 with heat recovery 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 designed for extended periods of continuous operation without disconnection from power mains.
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%.
The transported air temperature range is from -25 °C up to +40° C.
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
600 PW EC
VUT
1000 PW EC
Ø D 199 249
B 827 1350
B1 711 1215
B2 - 607,5
B3 294 430
B4 345 655
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 [dB(A)] 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

7
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 air
extract air
intake air
exhaust air
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
Extract lter
Water heater
Bypass
Extract fan
Supply lter
Unit design based on VUT 600 PW EC unit example

9
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.

11
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.
13 24

13
CONNECTION TO POWER MAINS
DISCONNECT THE UNIT FROM 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 LA
BEL. ANY TAMPERING WITH THE INTERNAL CONNECTIONS IS PROHIBITED AND WILL VOID THE
WARRANTY.
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

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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 input (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
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.
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.

15
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. Remove the 5 screws and take the service panel o. Remove the panel with care.
2. 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. Remove the 5 screws and take the service panel o. Remove the panel with care.
2. Pull the rst heat exchanger and remove it from the unit.
3. Disconnect the contact socket on the bypass wall and remove the bypass.
4. 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.

17
FAULTS AND FAULT HANDLING
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 packing box in a dry closed ventilated premise with temperature range from +5 °C to + 40°C.
Vapours or particles which can cause corrosion or damage the insulation or connection tightness are not allowed in the storage environ-
ment.
Use hoist machinery for handling and transportation to prevent possible mechanical damages of the unit.
Full the requirements for transportation of the specied cargo type.
Use any vehicle types for the unit transportation provided that it is protected against mechanical or weather damage.
Avoid any mechanical shocks and strokes during handling operations.

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18
MANUFACTURER’S WARRANTY
The manufacturer hereby warrants normal operation of the unit over the period of 24 months from the retail sale date provided the user’s
observance of the transportation, storage, installation and operation regulations.
Should any malfunctions occur during the unit operation due to manufacturer’s fault during the warranty period the user is entitled to elimi-
nation of faults by means of warranty repair performed by the manufacturer.
The warranty repair includes work specic to elimination of faults in the unit operation to ensure its intended use by the user within the war-
ranty period. The faults are eliminated by means of replacement or repair of the complete unit or the faulty part thereof.
The warranty repair does not include:
• routine maintenance;
• unit installation / dismantling;
• unit setup.
To benet from warranty repair the user must provide the unit, the user’s manual with stamped sale date and the payment document certify-
ing 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 provide the unit with the entire delivery package as stated in the user’s manual or with missing component parts previ-
ously dismounted by the user;
• mismatch of the unit model and make with the respective details stated on the unit packing and in the user’s manual;
• user’s failure to ensure timely technical maintenance of the unit;
• external damage to the casing (excluding external modications of the unit as required for its installation) and the internal components
of the unit;
• alteration of the unit design or engineering changes of the unit;
• replacement and use of the unit assemblies, parts and components not approved by the manufacturer;
• unit misuse;
• user’s violation of the unit installation regulations;
• user’s violation of the unit management regulations;
• unit connection to the power mains with a voltage dierent from the one stated in the user’s manual;
• unit breakdown due to voltage surges in the power mains;
• user’s discretionary repair of the unit;
• unit repair performed by any persons not authorized by the manufacturer;
• expiry of the unit warranty period;
• user’s violation of the established regulations specic to the unit transportation;
• user’s violation of the unit storage regulations;
• wrongful acts against the unit committed by third persons;
• unit breakdown due to circumstances of insuperable force (re, ood, earthquake, war, hostilities of any kind, or blockade);
• missing seals if provided by the user’s manual;
• failure to provide the user’s manual with the sale date stamp;
• missing payment document certifying the unit purchase.
FOLLOWING THE REGULATIONS STIPULATED HEREIN WILL ENSURE A LONG AND TROUBLE-FREE
OPERATION OF THE UNIT.
USERS’CLAIMS SHALL BE A SUBJECT TO REVIEW ONLY UPON PRESENTATION OF THE UNIT, THE
PAYMENT DOCUMENT AND THE USER’S MANUAL WITH THE SALE DATE STAMP.

19
Shop name
Address
Phone number
E-mail
Sales date
Seller’s seal
ACCEPTANCE CERTIFICATE
MOUNTING CERTIFICATE
SELLER INFORMATION
Product Type Heat recovery air handling unit
Model VUT __________ PW EC
Serial Number
Manufacturing Date
We hereby declare that the product complies with the essential protection requirements of Electromagnetic Council Directive2004/108/EC,
89/336/EEC and Low Voltage Directive 2006/95/EC, 73/23/EEC and CE-marking Directive 93/68/EEC on the approximation of the laws of the
Member States relating to electromagnetic compatibility.
This certicate is issued following test carried out on samples of the product referred to above.
Quality Inspector’s
Stamp
This is to certify delivery of the complete unit with the user’s manual.
Customer's signature
VUT _____PW EC heat recovery air handling unit has been connected to power mains pursuant to the
requirements stated in the present user's manual.
Company name
Address
Phone number
Installation techni-
cian's full name
Installation date: Signature: Installation technician’s com-
pany seal
This is to certify that the works specic to the unit installation has been performed in accordance with
all the applicable provisions of local and national construction, electrical and technical codes and
standards. The unit operates normally as intended by the manufacturer.
Signature:

www.ventilation-system.com
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Product type Heat recovery air handling unit
Model VUT __________ PW EC
Serial Number
Manufacturing date
Sales date
Warranty period
Sales company
Seller’s seal
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WARRANTY CARD