Vents VUT 350 H User manual

РУКОВОДСТВО ПОльзОВаТеляРУКОВОДСТВО ПОльзОВаТеля
USER’S MANUAL
VUT 350 H
VUT 500 H
VUT 530 H
VUT 600 H
VUT 1000 H
VUT 2000 H
HEAT RECOVERY AIR HANDLING UNIT

2
CONTENTS
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
Condensate drainage 10
Connection to power mains 11
Unit control 12
Maintenance 13
Fault handling 14
Storage and transportation rules 14
Manufacturer's warranty 15
Acceptance certicate 16
Seller information 16
Connection certicate 16
Warranty card 17

3
SAFETY REQUIREMENTS
• Read the user’s manual carefully prior to the operation and installation of the VUT … H 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 codes and standards.
• The warnings contained in the user’s manual must be considered most seriously since they contain vital personal safety infor-
mation.
• 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:
WARNING!
DO NOT!
UNIT MOUNTING AND OPERATION SAFETY PRECAUTIONS
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 out-
side the temperature range stated
in the user’s manual and in aggres-
sive 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 of the power cable.
Do not position any heating
devices or other equipment
in close proximity to the unit
power cable.

4
Do not touch the unit controls
with wet hands.
Do not carry out the unit mainte-
nance with wet hands.
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 wash the unit with water.
Protect the unit electric parts
from water ingress.
Do not put any water containers
on the unit, i.e. ower vases.
Keep combustible gases and
inammable products away from
the unit.
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.
Do not sit on the unit and do not
put any objects on it. Do not open the operating unit.
In case of unusual sounds, smell
of smoke disconnect the unit
from power supply and contact
the service centre.
During a long-term operation of
the unit periodically 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.

5
INTRODUCTION
This user’s manual includes technical description, operation, installation and mounting guidelines, technical data for the VUT … H
heat recovery air handling unit, hereinafter referred to as “the unit”.
USE
• Due to the ability to save heating energy by means of energy recovery the unit is an important energy saving element used in
the buildings and premises. The unit is a component part and is not designed for stand-alone 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 extended periods of continuous operation without disconnection from the 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).
THE UNIT IS NOT INTENDED TO BE USED BY CHILDREN, PHYSICALLY OR MEN
TALLY DISABLED PERSONS, PERSONS WITH SENSORY DISORDER, PERSONS WITH
NO APPROPRIATE QUALIFICATION. ALL OPERATIONS WITH THE UNIT MUST BE
PERFORMED ONLY BY PROPERLY QUALIFIED PERSONNEL AFTER THE APPROPRI
ATE SAFETY BRIEFING. THE UNIT INSTALLATION SITES MUST PREVENT ACCESS
BY UNATTENDED CHILDREN.
DELIVERY SET
Unit 1 item
Speed switch 1 item
User’s manual 1 item
Packing box 1 item
DESIGNATION KEY
Spigot orientation
H - horizontal
Air capacity [m3/h]
350, 500, 530, 600, 1000, 2000
Unit type
VUT - ventilation with heat recovery
VUT Х H

6
TECHNICAL DATA
The air-handling unit is intended for operation in closed spaces under ambient air temperatures from +10 ºC to +50 ºC.
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.
Unit overall and connecting dimension
Model Dimensions [mm]
ØD B B1 B2 B3 H H1 H2 L L1
VUT 350 H 124 416 300 54 207 603 230 148 722 768
VUT 500 H 149 416 300 54 207 603 230 148 722 768
VUT 530 H 159 416 300 54 207 603 230 148 722 768
VUT 600 H 199 416 300 54 207 603 230 148 722 768
VUT 1000 H 248 548 496 60 213 794 290 200 802 850
VUT 2000 H 313 846 796 235 588 968 360 246 1000 1050

7
Unit technical data
Parameter VUT
350 H
VUT
500 H
VUT
530 H
VUT
600 H
VUT
1000 H
VUT
2000 H
Unit supply voltage, 50 Hz [V] 1~ 230
Total unit power [W] 260 300 300 390 820 1300
Total unit current [A] 1,2 1,32 1,32 1,72 3,6 5,68
Max. air capacity, m3/h 350 500 530 600 1200 2200
PRM 1150 1100 1100 1350 1850 1150
Sound pressure level at 3 m distance [dB(A)] 24-45 28-47 28-47 32-48 60 65
Transported air temperature [°C] from -25 up
to +55 from -25 to +50 from -25 to +55 from -25 to +40
Casing material aluzinc
Insulation 25 mm mineral wool 50 mm mineral wool
Extract lter G4
Supply lter F7 G4(F7)* G4(F7)*
Replaceable lter G4* SF VUT 350-600 H G4 SF VUT 1000
H G4
SF VUT 2000
H G4
Replaceable lter F7* SF VUT 350-600 H F7 SF VUT 1000
H F7
SF VUT 2000
H F7
Summer block* VL VUT 350 H VL VUT 500-600 H VL VUT1000
H
VL VUT2000
H
Connected air duct diameter [mm] Ø125 Ø150 Ø160 Ø200 Ø250 Ø315
Weight [kg] 45 49 49 54 85 96
Heat recovery eciency, % up to 78 up to 88 up to 88 up to 85 up to 88 up to 87
Heat exchanger type cross ow
Heat exchanger material Aluminium
*extra summer blocks and sets of replaceable lters are optional extras and can be purchased separately.

8
UNIT DESIGN AND OPERATING LOGIC
Unit operation 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 intake air heating expenses in cold seasons.
The thermostat relay installed in the unit casing provides frost protection of the heat exchanger during cold seasons.
The dierence between the intake and extract air temperatures results in condensation formation in the heat exchanger during
the air-handling unit operation. The condensate is collected in the condensate drain pan and is extracted from the unit via the
drain pipe.
The air handling unit is equipped with specially sealed service panels for repair and maintenance operations. The terminal box
on the side panel incorporates a terminal block. Power and ground cables are connected to the terminal block through the
sealed electric lead-ins.
Condensate drain pipe
EXHAUST AIR
EXTRACT AIR
SUPPLY AIR
INTAKE AIR
Terminal box
Extract lter Supply lter
Supply fan
Heat exchanger
Drain pan
Thermostat relay
Extract fan
Control unit
VUT 350 ... 600 H
Speed switch
VUT 1000 ... 2000 H
Supply fan switch
Condensate drain pipe
Supply fan
Heat exchanger Drain pan
Thermostat relay
Extract lter
Extract fan
Supply lter
Speed switchControl unit
Supply fan switch
EXHAUST AIR
EXTRACT AIR
SUPPLY AIR
INTAKE AIR

9
MOUNTING AND SETUP
The unit may be suspended on threaded rods that are xed inside a dowel or may be rigidly xed on a horizontal plane. While mount-
ing the unit provide enough access for maintenance or repair work.
Unit ceiling mounting Unit oor mounting
Safety precautions:
In a oor-mounted conguration the unit must be provided with a rigid and stable base structure (the technical characteristics
and unit weight specications are given in the technical parameters table).
To x the unit to the oor use anchor bolts. Make sure that the base structure is capable of sustaining the unit weight. Other-
wise reinforce the mounting location with beams or similar elements.
To x the unit to the ceiling use anchor bolts. The insucient strength of fastening system causes resonance with the vibra-
tions generated by the unit which, in turn, results in unwanted noise.
Therefore, arrange a maintenance area and an inspection hole for air lter, heat exchanger and fan service in consideration of
the unit overall dimensions (see page 6). Provide an inspection hole for each unit.
Install M8 anchor bolts before proceeding with the installation. Insert the anchor bolt into the ceiling mounting opening and
secure it with nuts and washers.
Prior to commencing the installation check the unit casing for any left-over foreign objects such as plastic lm or paper.
The lack of length in the anchor bolts used for the unit installation may cause abnormal noise resulting from resonance with
the natural vibrations of the ceiling.
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. To ensure the best performance of the
unit provide a straight duct section on both sides of the unit at least 1 m in length.
The unit must be equipped with a grille with the minimum cell diameter of 12.5 mm or a similar protective device preventing
free access to the fans.
P31300 MECHANICAL SPEED SWITCH INSTALLATION:
MAKES SURE THAT THE SWITCH IS INTACT. DO NOT USE DAMAGED SWITCHES.
DO NOT MOUNT THE SWITCH ONTO AN UNEVEN SURFACE. WHILE TIGHTEN
ING THE SELFTAPPING SCREWS DO NOT APPLY EXCESSIVE FORCE TO PREVENT
SWITCH CASING DEFORMATION.
The speed switch is part of the unit delivery set and is factory-connected to the terminal block located inside the unit control box according
the wiring diagram (see Fig.“Wiring diagram”).
Route all the necessary cables and wires to the switch tting location.
Install the mounting box (not included in the delivery set) into the wall.
Disassemble the switch and disconnect the connected wires.

10
Connect the switch according to the wiring diagram (see page 12).
Place the executive part of the switch into the mounting box.
Secure the executive part of the switch by means of two screws (included in the delivery set).
Cover the executive part of the switch with the decorative front panel and secure the panel by pressing the panel surface over
the latches until they snap in place.
CONDENSATE DRAINAGE
DO NOT CONNECT SEVERAL DRAIN PIPES FROM SEVERAL AIR HANDLING
UNITS TO ONE UTRAP! DIRECT CONDENSATE DRAINAGE OUTSIDE WITHOUT
CONNECTION TO SEWAGE SYSTEM IS NOT ALLOWED.
The unit must be connected to a drainage system. Connect the drain pipe, the U-trap (not included in the standard delivery set) and
the sewerage system with metal, plastic or rubber pipes. The pipes must be installed at the minimum downward gradient of 3°. The
recommended U-trap sizes are given in the table:
Unit model Minimum dimensions, [mm]
 B
VUT 350 … 600 H 120 60
VUT 1000 … 2000 H 200 110
Before starting the unit ll the system with water and check that the U-trap is always lled with water. Make sure that the water drain-
age is correct. Wrong connection to sewage system may result in condensate accumulation inside the unit.
The condensate drainage system is designed for operation at the ambient temperature above 0 °C!
If the ambient temperature is below 0 °C, the condensate drainage system must be heat insulated and pre-heated.
Drain pipe
U-trap Sewage system
1°.. 3°
A
B
1°.. 3°

11
CONNECTION TO POWER MAINS
THE POWER MAINS CONNECTION SHALL ONLY BE PERFORMED BY QUALIFIED
PERSONNEL AFTER CAREFUL READING OF THIS USER’S MANUAL. CONNECT
THE UNIT TO AN AC POWER SUPPLY WITH THE VOLTAGE CORRESPONDING TO
THE VALUE SPECIFIED IN THE TABLE OF TECHNICAL DATA. MAKE SURE THAT
THE CABLE IS NOT PINCHED. DO NOT SWITCH ON THE UNIT IF THE CABLE IS
DAMAGED. NEVER REMOVE THE PLUG FROM THE POWER OUTLET WITH WET
HANDS. DO NOT PULL ON THE ELECTRIC CABLE. DISCONNECT THE UNIT FROM
POWER SUPPLY PRIOR TO ANY OPERATIONS WITH THE UNIT! THE RATED ELEC
TRICAL 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.
The unit is rated for connection to single-phase AC 230 V / 50 Hz power mains. The connection must be made using durable, insu-
lated and heat-resistant conductors (cables and wires). The external power input must be equipped with an automatic circuit breaker
built into the stationary wiring to disconnect all the power mains phases. The automatic circuit breaker position must ensure free access
for emergency shutdown of the unit.
Recommended rated current of the circuit breaker depending on the unit model:
Unit model Rated current of the circuit breaker [A]
VUT 350 H
1,6VUT 500 H
VUT 530 H
VUT 600 H 2
VUT 1000 H 6
VUT 2000 H 10
The conductor cross section is 0.75 mm2. The given conductor section value is tentative. In practice the conductor selection shall
be based on the maximum permissible wire heating depending on the wire type, its insulation, length and installation method (i.e.
overhead, in pipes or inside the walls).
Use copper wires only.
The unit must be grounded!

12
VUT ... H air-handling units must be connected to the power mains in accordance with the wiring diagram and the terminal
designations given inside the terminal box or the control unit:
L
N
PE
QF
X1
N
L
VUT 350 ... 600 H
electrical connections diagram
L
N
PE
QF
VUT 1000 ... 2000 H
electrical connections diagram
Terminal box
Control unit
N
L
Х4
1
2
3
4
5
123
C B
P3-1-300 speed switch Control unit
Х4
C
B
L
M
H
123
C B
P3-1-300 speed switch
All the control and power supply wires must be connected in accordance with the terminal markings. The supply mains wires are
attached to the respective clamps of X1 terminal block (VUT 350 ... 600 H) or X4 (VUT 1000 ... 2000 H).
The automatic circuit breaker with a thermal magnetic trip protects the unit circuit against overloading and shorting.
P3-1-300 speed switch is used to activate and deactivate the unit as well as to select the desired operation speed.
The unit is equipped with a built-in heat exchanger protection system to prevent its freezing in the cold season. If the heat exchanger
freezing becomes imminent a thermostat relay interrupts the supply fan circuit. After the supply fan shuts down automatically the heat
exchanger is warmed up by the stream of warm air from the extract fan. When the heat exchanger has thawed the supply fan activates
automatically. The recommended operating value for the thermostat relay in the absence of a duct heater in the ventilation system
plenum segment is +3 °C (factory setting). To set the thermostat operation temperature turn the control knob until reaching the desired
value.
Pressing the designated keyswitch also turns the supply fan o. The keyswitch is located either on the side panel (VUT 350 ... 600 H)
or on the control unit (VUT 1000 ... 2000 H).
The terminal designation diagram is given on the sticker inside the terminal box or the control unit. The unit terminal screw markings
comply with the respective ones on the electrical diagram.
The cables are routed into the terminal box through a sealed lead-in for electrical hazard class compliance.
UNIT CONTROL
The unit is controlled by means of P3-1-300 speed switch.
Make sure to install the switch in a convenient location. The speed switch is part of the unit delivery set and is factory-connected to
the terminal block located inside the unit control box according the wiring diagram (see Fig.“Wiring diagram”).
To engage the desired speed turn the speed control knob clockwise into one of
the three positions available:
1 — Speed 1;
2 — Speed 2;
3 — Speed 3.
To switch off the unit turn the speed control knob counterclockwise until
reaching the OFF position.
3
O
12
3OFF

13
MAINTENANCE
The unit must undergo technical maintenance 3 to 4 times a year. Maintenance includes general cleaning of the unit and the following
operations:
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. Clean the lters with a vacuum cleaner or replace them. For new lters contact your Seller.
2. Heat exchanger maintenance (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
exchange eciency, regular cleaning is required. To clean the heat exchanger pull it out, ush the heat exchanger with warm detergent
solution. After cleaning install the dry heat exchanger back to the unit.
To remove the lters and the heat exchanger proceed as follows:
make sure the unit is disconnected from power mains;
undo four clips that x the front panel from the service side (refer to para. 1), remove the panel (refer to para. 2).
remove the lters (refer to para. 3).
remove the heat exchanger (refer to para. 4).
1. 2.
3. 4.
1. 2.
3. 4.
3. Fan maintenance (once a year).
Even regular technical maintenance of the lters may not completely prevent dirt accumulation in the fans which reduces the fan ca-
pacity. Clean the fans with rugs or a soft brush. Do not use water, aggressive solvents or sharp objects as they may damage the impeller.
4. Technical maintenance of condensate drainage system (once a year).
The condensate drainage (drain line) may get clogged by dirt and dust particles contained in the exhaust air. Check the drain line opera-
tion by lling the drain pan under the unit with water, clean the U-trap and the drain line, if necessary.
5. Technical maintenance of the supply grille (twice a year).
The supply duct grille may get clogged with leaves and other objects reducing the unit performance and supply air delivery. Check the
supply duct grill twice a year and clean it as required.

14
6. Technical maintenance of air duct system (every 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. The air duct maintenance includes their periodic cleaning or replacement.
7. Technical maintenance of the exhaust louver shutters and supply diusers (as required).
Remove the diusers and the louvre shutters and wash those with warm detergent solution. Do not change the position of the dif-
fusers and the louvre shutters.
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, other-
wise troubleshoot a connection error.
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.
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, the fans or the heat exchanger
are dirty.
Clean or replace the lters, clean the fans and the heat ex-
changer.
The ventilation system components (air
ducts, diusers, louver shutters, grilles) are
clogged or damaged.
Clean or replace the ventilation system components, such as air
ducts, diusers, louver shutters, grilles.
The air dampers, diusers or the louvre
shutters are closed.
Make sure the air dampers, diusers or the louvre shutters are
fully opened.
Noise, vibration.
The impeller(s) is soiled. Clean the impeller(s).
The screw connection is loose. Tighten the fan or casing screw connection against stop.
No anti-vibration connectors. Install anti-vibration connectors (available upon separate
order).
Water leakage. The drain line is clogged, damaged or
wrong mounted.
Clean the drain line, if necessary. Check the drain line slant,
inspect the U-trap and make sure the drain line is equipped
with frost protection.
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 envi-
ronment.
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.

15
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
elimination 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
warranty 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
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 provide the unit with the entire delivery package as stated in the user’s manual or with missing component parts
previously 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 com-
ponents 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 control 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 blockades);
• 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.

16
ACCEPTANCE CERTIFICATE
Product Type Heat recovery air handling unit
Model VUT______ H
Serial Number
Manufacturing Date
We hereby declare that the product complies with the essential protection requirements of Electromagnetic Council Directive
2004/108/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
SELLER INFORMATION
Shop name
Address
Phone number
E-mail
Sales date
This is to certify delivery of the complete unit with the user’s manual. The warranty terms are ac-
knowledged and accepted.
Customer’s signature
Seller’s seal
CONNECTION CERTIFICATE
VUT ___ H 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
technician's full name
Installation date: Signature:
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:
Installation technician’s
company seal

17
WARRANTY CARD
Product type Heat recovery air handling unit
Model VUT______H
Serial number
Manufacturing date
Sales date
Warranty period
Sales company
Seller’s seal
NOTES
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V26EN-02