Vents Micra 110 User manual

USER'S MANUAL
Air handling unit
Micra 110
Micra 110 V1
Micra 110 ERV
Micra 110 V1 ERV

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Micra 110 (V1) (ERV)
www.ventilation-system.com
CONTENTS
This user’s manual is a main operating document intended for technical, maintenance, and operating staff.
The manual contains information about purpose, technical details, operating principle, design, and installation of the Micra 110 (V1) (ERV)
unit and all its modifications.
Technical and maintenance staff must have theoretical and practical training in the field of ventilation systems and should be able to
work in accordance with workplace safety rules as well as construction norms and standards applicable in the territory of the country.
Safety requirements..................................................................................................................................................................... 2
Purpose................................................................................................................................................................................................ 4
Delivery set........................................................................................................................................................................................ 4
Designation key.............................................................................................................................................................................. 4
Technical data.................................................................................................................................................................................. 5
Mounting and set-up.................................................................................................................................................................. 9
Connection to power mains .................................................................................................................................................. 14
Control ................................................................................................................................................................................................. 15
Technical maintenance.............................................................................................................................................................. 16
Troubleshooting............................................................................................................................................................................. 17
Storage and transportation regulations.......................................................................................................................... 17
Manufacturer’s warranty........................................................................................................................................................... 18
Certificate of acceptance.......................................................................................................................................................... 19
Seller information.......................................................................................................................................................................... 19
Installation certificate.................................................................................................................................................................. 19
Warranty card................................................................................................................................................................................... 19
SAFETY REQUIREMENTS
All operations described in this manual must be performed by qualified personnel only, properly
trained and qualified to install, make electrical connections and maintain ventilation units.
Do not attempt to install the product, connect it to the mains, or perform maintenance yourself.
This is unsafe and impossible without special knowledge.
Disconnect the power supply prior to any operations with 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.
Disconnect the unit from the power supply prior to any connection, servicing, maintenance, and
repair operations.
Only qualied electricians with a work permit for electrical units up to 1000 V are
allowed for installation. The present user’s manual should be carefully read before
beginning works.
Check the unit for any visible damage of the impeller, the casing, and the grille before starting
installation. The casing internals must be free of any foreign objects that can damage the
impeller blades.
While mounting the unit, avoid compression of the casing! Deformation of the casing may result

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THE PRODUCT MUST BE DISPOSED SEPARATELY AT THE END OF ITS SERVICE LIFE.
DO NOT DISPOSE THE UNIT AS UNSORTED DOMESTIC WASTE
in motor jam and excessive noise.
Misuse of the unit and any unauthorised modifications are not allowed.
Do not expose the unit to adverse atmospheric agents (rain, sun, etc.).
Transported air must not contain any dust or other solid impurities, sticky substances, or fibrous
materials.
Do not use the unit in a hazardous or explosive environment containing spirits, gasoline,
insecticides, etc.
Do not close or block the intake or extract vents in order to ensure the efficient air flow.
Do not sit on the unit and do not put objects on it.
The information in this user’s manual was correct at the time of the document’s preparation.
The Company reserves the right to modify the technical characteristics, design, or configuration
of its products at any time in order to incorporate the latest technological developments.
Never touch the unit with wet or damp hands.
Never touch the unit when barefoot.
BEFORE INSTALLING ADDITIONAL EXTERNAL DEVICES, READ THE RELEVANT USER MANUALS.
Connection to the mains must be made through a disconnecting device, which is integrated
into the fixed wiring system in accordance with the wiring rules for design of electrical units,
and has a contact separation in all poles that allows for full disconnection under overvoltage
category III conditions.
This unit is not intended for use by persons (including children) with reduced physical, sensory
or mental capabilities, or lack of experience and knowledge, unless they have been given
supervision or instruction concerning use of the unit by a person responsible for their safety.
Children should be supervised to ensure that they do not play with the unit.
This appliance can be used by children aged from 8 years and above and persons with reduced
physical, sensory or mental capabilities or lack of experience and knowledge if they have been
given supervision or instruction concerning use of the appliance in a safe way and understand
the hazards involved.
Cleaning and user maintenance shall not be made by children without supervision.
Children shall not play with the appliance.
Ensure that the unit is switched off from the supply mains before removing the guard.
Precautions must be taken to avoid the back-flow of gases into the room from the open flue of
gas or other fuel-burning appliances.
If the supply cord is damaged, it must be replaced by the manufacturer, its service agent, or
similarly qualified persons in order to avoid a safety hazard.

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PURPOSE
The unit is designed to ensure continuous mechanical air exchange in residential premises, offices, hotels, cafés, conference halls, and
other 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).
DELIVERY SET
NAME NUMBER
MICRA 110 ERV MICRA 110 V1 ERV
Mounting 1 1
User's manual 1 1
Template 1 1
Fastening kit 1 1
Magnetic sheet 1 2
Key 1 1
Spigot 1 —
Packing box 1 1
DESIGNATION KEY
Micra 110 V1 ERV
Equipped with an enthalpy heat exchanger
Casing modication for built-in mounting
Rated air ow [m3/h]
Series of units

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PARAMETER MICRA 110 MICRA 110 V1 MICRA 110 ERV MICRA 110 V1 ERV
Speed 123123123123
Maximum air flow [m3/h] 30 60 100 30 60 100 30 60 100 30 60 100
Supply voltage, 50 (60) Hz [V] 1~ 230
Unit power [W] 10 15 31 10 15 31 10 15 31 10 15 31
Maximum unit current [A] 0,26
RPM [min-1]3200
Sound power level [dBA] 31 41 51 31 41 51 31 41 51 31 41 51
Sound pressure level at 1 m distance [dBA] 20 30 40 20 30 40 20 30 40 20 30 40
Sound pressure level at 3 m distance [dBA] 10 21 31 10 21 31 10 21 31 10 21 31
Transported air temperature [°С] -15...+40
Casing material Painted steel Painted steel, galvanized
steel Painted steel Painted steel, galva- nized steel
Insulation [mm] 10
Supply filter ISO 16890 / EN 779:2012 Coarse 90% / G4
Extract filter ISO 16890 / EN 779:2012 Coarse 90% / G4, ePM1 65% / F7 (option)
Heat recovery efficiency [%] 93 87 84 93 87 84 85 80 72 85 80 72
Humidity recovery efficiency [%] -45 39 29 45 39 29
Heat exchanger type Counter-flow
Heat exchanger material Polystyrene Enthalpy
Connected air duct diameter [mm] 2х100 mm + 1x100 mm
(option)
2х100 mm + 4x75 mm
(option)
2х100 mm + 1x100 mm
(option)
2х100 mm + 4x75 mm
(option)
Weight [kg] 20 23 20 23
SEC class A
TECHNICAL DATA
The unit is designed for indoor application with the ambient temperature ranging from +1 °C up to +40 °C and relative humidity up to
60 % without condensation. In cold, damp rooms, there is a possibility of freezing or condensation inside and outside the casing.
In order to prevent condensation on the internal walls of the unit, it is necessary that the surface temperature of the casing is 2-3 °C above
the dew point temperature of the transported air.
The unit should be operated continuously, and in cases where ventilation is not necessary, reduce the air flow of the fans to a
minimum (20%). This will ensure a favorable indoor climate and reduce the amount of condensation inside the unit, which can damage
electronic components. Never use the unit for dehumidification, for example, of new buildings.
The unit is rated as a Class I electrical appliance.
Hazardous parts access and water ingress protection rating:
IP20 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.

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Micra 110 (V1) (ERV)
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MICRA 110 ERV
A
L
JK
BG
H I H
C
E
F
ØD
MICRA 110 V1 ERV
A
L
K
B
H I H
C
E
F
ØD
Model Dimensions [mm]
Ø D A B C E F G H I J K L
Micra 110 (ERV) 100 834 496 195 165 251 75 95 270 644 81 800
Micra 110 V1 (ERV) 840 500 224 67 284 — — 800

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Mounting plate for MICRA 110 V1 ERV
V1
V2
V5
V7
V6V6 V5
V4
V8V9
V3
Dimensions [mm]
V1 V2 V3 V4 V5 V6 V7 V8 V9
570 510 79 156 67 104 460 73 82

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Micra 110 (V1) (ERV)
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2
1
6
3
4
4
5
77
8
1: extract filter
2: heat exchanger
3: control unit
4: fan unit
5: drain pan
6: supply filter
7: damper with an electric actuator ()
8: condensate drain pipe (Micra 110 (V1))
Extract air from the room flows to the unit, where it is filtered by the extract filter, then air flows through the heat exchanger and is
exhausted outside by the extract fan.
Intake air from outside flows into the unit, where it is cleaned by the supply filter. Then filtered air flows through the heat exchanger
and is moved to the room with the supply fan.
Thermal energy of warm extract air is transferred to clean intake fresh air from outside and warms it up. The air flows are fully separated.
Heat recovery minimizes heat losses, which reduces the cost of space heating in the cold season.
Frost protection of the heat exchanger (danger of freezing appears when the exhaust air temperature downstream of the heat
exchanger is lower than +5 °C) is provided by automatically switching off the supply fan.
The frost protection mode of the heat exchanger is deactivated at an air temperature above +7 ˚С.
Frost protection is only possible in heat recovery mode.
The Micra 110 (ERV) units provide for the installation of an exhaust spigot (Ø 100 mm) for servicing another room.
The spigot is included in the delivery set.
The exhaust grille must be covered with the magnetic plug supplied.
The Micra 110 V1 (ERV) units provide for the connection of FlexiVent 75 air ducts.
When using a mounting plate, the exhaust and supply grilles must be closed with the magnetic plugs included in the delivery set.
Micra 110 (ERV) Micra 110 V1 (ERV) with mounting plate
11
3
3
22
4
4
1
1
33
2
4
4
1 – supply air
2 – intake air
3 – extract air
4 – exhaust air
DESIGN AND OPERATING PRINCIPLE

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MOUNTING AND SETUP
READ THE USER'S MANUAL BEFORE INSTALLING THE UNIT.
BEFORE INSTALLING ADDITIONAL EXTERNAL DEVICES,
READ THE RELEVANT USER MANUALS
Micra 110 (ERV)
The delivery set includes a mounting template for marking the
holes.
Fix the mounting template at the required level on the wall.
Mark the holes for the air ducts and holes for mounting the unit.
Before installation operations route necessary cables and wires to
the unit mounting place.
Remove the mounting template and drill two through holes
Ø 120 mm in the wall for the air ducts.
When mounting the unit with an extract spigot prepare a hole in
the wall for a connecting bend and for laying of a rectangular air
duct.
A connecting bend, rectangular and round air ducts are available
separately.
Drill Ø 8 mm holes to mount the unit.
Install the expansion anchors, remove the perforated fillers for the
air ducts from the mounting template and install the mounting
template back.
Prepare air ducts of required length. Note that the telescopic air
duct end must protrude for the distance that enables installation
of the outer ventilation hood. For details, refer to the installation
instruction for the ventilation hood.
The outer ventilation hood is available separately.
Insert the air ducts in the corresponding holes of the mounting
template. Install the air duct A with the minimum slope of 3 mm
for condensate removal.
To install the unit with an additional spigot, insert the connecting
bend into the prepared hole in the wall, aligning the mounting
template hole with a round end of the connecting bend. Connect
a rectangular duct to the connecting bend. Fill the gaps between
the air ducts and the wall with a mounting foam.
Wait till the mounting foam hardens then take off the mounting
template and remove the foam excess.
Cut off the protruding air duct parts to be flush with the wall
surface.
A
WHILE INSTALLING THE UNIT ENSURE CONVENIENT ACCESS FOR SUBSEQUENT
MAINTENANCE AND REPAIR.

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Micra 110 (V1) (ERV)
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To install an extract spigot, remove the plug on the rear part of
the unit.
Undo the screws, remove the plug and fix a spigot on its place.
To access the mounting holes, remove the decorative panel,
unscrew the screws and remove the protective panel, remove the
heat exchanger.
If an optional exhaust spigot is installed, install a magnetic plug on
the exhaust grille.
For Micra 110 units it is recommended to use a condensate drain
pipe heater (not included in the delivery set).
The heater must be installed before fixing the unit to the wall (see
the heater installation manual).
Lift the unit, insert the spigots into the air ducts installed in the
wall.
Fix the unit using the supplied screws.
The unit is secured with five screws.
Install the heat exchanger, protective and decorative panels.
Mount an outer ventilation hood (not included in the delivery
set).

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MICRA 110 V1 ERV
The Micra 110 V1 (ERV) units are designed for built-in wall mounting.
Before installation, it is necessary to fix the mounting plate in the niche.
If FlexiVent air ducts are to be used, prepare the necessary cavities for the air ducts in the solid wall beforehand.
Lay the air ducts in the wall, remove the plugs from the plate and connect the air ducts.
Before installing the plate, it is necessary to lead the wires through the cable gland.
For a frame wall, two vertical profiles must be mounted
in advance, between which a mounting plate is mounted
horizontally. Use self-tapping metal screws for fastening.
In the niche of a solid wall, fix the plate with self-tapping screws
into the pre-installed dowels.
To securely fix the plate, it is recommended to fix it with self-tapping screws to a horizontal profile or wall.
Drill two Ø 120 mm holes in the wall for air ducts.

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Insert the air ducts into the holes.
Install the air duct A with the minimum slope of 3 mm for
condensate removal.
Fill the gaps between the air ducts and the wall with a mounting
foam.
Wait till the mounting foam hardens then take off the mounting
template and remove the foam excess.
Cut off the protruding air duct parts to be flush with the wall
surface.
A
For Micra 110 V1 units it is recommended to use a condensate
drain pipe heater (not included in the delivery set).
The heater must be installed before fixing the unit to the mounting
plate (see the heater installation manual).
To access the mounting holes, remove the decorative and
protective panel.
To remove the protective panel, it is necessary to remove the
filter covers, unscrew the screws and disconnect the control
panel from the controller.
Lift the unit, insert the spigots into the air ducts installed in the
wall.
Fix the unit with screws on the mounting plate.
Screw the mounting flange to the uprights or wall with self-
tapping screws.
If flexible air ducts are used, then the exhaust and supply grilles of
the decorative panel must be covered with magnetic plates.

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Install the protective and the decorative panels.
WARNING!
When installing the decorative panel, make sure it hooks
into the brackets to prevent it from falling o.
Mount an outer ventilation hood (not included in the delivery
set).

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CONNECTION TO POWER MAINS
A1.1
XT4
X1
XT2
Boost
Boost* PK1*
3 2 1 9 8 7 6 ... 1
Li Ni L N ... Ex
Fire
GND
Designation Name Cable Note
PK1* Contact from fire alarm panel 2x0.5 mm2Remove the jumper
Boost* Contacts On/Off of the Boost mode 2x0.5 mm2
— Electric shock hazard!
The contact block J3 is located on the controller board.
Using the DIP switch, you can set the operation of the unit in summer ventilation mode
J3
1
1 2
3 4
DIP SWITCH POSITIONS
1-3: the unit works only in the heat recovery mode
1-2: in the summer ventilation mode, the exhaust fan is turned off
3-4: in the summer ventilation mode, the supply fan is turned off
POWER OFF THE POWER SUPPLY PRIOR TO ANY OPERATIONS WITH THE UNIT.
THE UNIT MUST BE CONNECTED TO POWER SUPPLY BY A QUALIFIED ELECTRICIAN.
THE RATED ELECTRICAL PARAMETERS OF THE UNIT ARE GIVEN ON THE
MANUFACTURER’S LABEL.
The connection must be made using durable, insulated and heat-resistant conductors (cables, wires).
The actual wire cross section selection must be based on the maximum load current, maximum conductor temperature depending on
the wire type, insulation, length and installation method.
The external power input must be equipped with an automatic circuit breaker built into the stationary wiring to open the circuit in the
event of overload or short-circuit.
The position of the external circuit breaker must ensure free access for quick unit power-off.
The trip current of the automatic circuit breaker must exceed the maximum current consumption of the unit (refer to the“Technical data”
section or to the unit label).
It is recommended to select the nominal current of the circuit breaker from the standard series, following the maximum current of the
connected unit.
The circuit breaker is not included in the delivery set and can be ordered separately.
The device contacts are connected in the control unit.
To access the control unit, remove the decorative panel, unscrew the screws and remove the protective panel.

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CONTROL
Ventilation units are controlled via a sensor control panel on the unit casing.
SPEED
MODE
FILTER
ALARM
I
II
III
1
2
3
4
5
6
7
8
9
10
11
1 – Switching the unit on/off.
If the unit is on, the indicator 4 lights up.
2 - button for switching speeds.
The indicators 5-7 indicate the current operating speed.
3 - button for switching operating modes.
If the indicator 8 is on, the unit is operating in the heat recovery
mode. If the indicator 9 is on, the unit is operating in the summer
ventilation mode.
10 – filter replacement indicator.
11 – alarm indicator.

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TECHNICAL MAINTENANCE
Maintenance operations of the unit are required 3-4 times per year. Maintenance includes periodic dust removal from surfaces, cleaning
or replacement of filters (when necessary) and dry cleaning of fans.
Maintenance includes general cleaning of the unit and the following operations:
1. Filter maintenance (3-4 times per year).
Dirty filters reduce supply air volume.
For cleaning, remove the decorative panel and the dirty filters from the unit
and clean them with a vacuum cleaner.
Install the filters back to the unit.
The filters require cleaning not less than 3-4 times per year.
For new filters, contact the Seller.
2. Heat exchanger maintenance (once a year).
Some dust may accumulate on the heat exchanger block even in case of
regular maintenance of the filters.
To maintain the high heat recovery efficiency, regular cleaning is required.
Periodical dry cleaning is recommended. Use a vacuum cleaner with a narrow
nozzle.
Remove the protective panels.
Remove the clogged heat exchanger out of the unit, clean it with a vacuum
cleaner and install the heat exchanger back to the unit.
3. Fan maintenance (once a year).
Even in case of regular maintenance of the filters, some dust may accumulate inside the fans and reduce the fan performance and supply
air flow.
Clean the fan with a cloth or a soft brush. Do not use water, aggressive solvents, or sharp objects as they may damage the impeller.
4. Technical maintenance of air duct system (every 5 years).
Even regular fulfilling 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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TROUBLESHOOTING
PROBLEM POSSIBLE REASONS TROUBLESHOOTING
The fan(s) do(es) not get
started. No power supply. Make sure that the unit is properly connected to the power mains and make any corrections, if necessary.
Cold supply air.
Extract filter clogging. Clean or replace the extract filter.
Heat exchanger icing.
Check the heat exchanger for icing.
Stop the unit operation if necessary and wait until the ice
melts.
Low air flow.
Filters, fans or the heat
exchanger are soiled.
Clean or replace the filters, clean the fans and the heat
exchanger.
The ventilation system is soiled
or damaged.
Check the opening of diffusers and louvre shutters.
Check the exhaust hood and the supply grille and clean those,
if necessary.
Make sure the air ducts are clean and intact.
Noise, vibration. The fan impeller is soiled. Clean the impellers.
The screw connection is loose. Tighten the fastening screws.
STORAGE AND TRANSPORTATION REGULATIONS
• Store the unit in the manufacturer’s original packaging box in a dry closed ventilated premise with temperature range +5...+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 operating 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 Compatibility (EMC) Directive 2014/30/EU of the European
Parliament and of the Council, Low Voltage Directive (LVD) 2014/35/EU of the European Parliament and of the Council and CE-marking
Council 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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CERTIFICATE OF ACCEPTANCE
Unit Type Air handling unit
Model
Serial Number
Manufacture Date
Quality Inspector’s
Stamp
SELLER INFORMATION
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
INSTALLATION CERTIFICATE
The _____________________________________ unit is installed pursuant to the requirements stated
in the present user's manual.
Installation Stamp
Company name
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:
WARRANTY CARD
Unit Type Air handling unit
Seller’s Stamp
Model
Serial Number
Manufacture Date
Purchase Date
Warranty Period
Seller

V250EN-01