Vents VUT2 250 P EC Mounting instructions

USER’S OPERATION MANUAL
VUT2 250 P EC
VUE2 250 P EC
VUTE2 250 P EC
AIR HANDLING UNIT WITH
SENSIBLE AND LATENT HEAT RECOVERY

2
VU..2 250 P EC
VU..2 250 P EC
Introduction ................................................................................................
Use ..................................................................................................................
Delivery set ..................................................................................................
Structural designation key .....................................................................
Technical data .............................................................................................
Safety requirements .................................................................................
Structure and operating logic ..............................................................
Mounting and set-up ...............................................................................
Condensate drainage ..............................................................................
Connection to power mains ..................................................................
Unit control .................................................................................................
Maintenance ...............................................................................................
Fault handling ............................................................................................
Storage and transportation rules ........................................................
Manufacturer’s warranty ........................................................................
Acceptance certicate .............................................................................
Electrical connection certicate ..........................................................
Warranty card .............................................................................................
CONTENTS
3
3
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5
6
7
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13
15
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INTRODUCTION
USE
DELIVERY SET
Unit - 1 piece;
Operation Manual - 1 piece;
Shipping box - 1 piece;
Fastener kit - 1 piece.
The present user’s operation manual contains technical description, data sheet, installation
and mounting guidelines for the air handling unit with heat (energy, heat and energy) recovery
VU_ 2 250 P EC (hereinafter referred as the unit).
The unit with sensible and latent heat recovery is designed to save heating and cooling costs by
means of thermal energy utilization and is one of the energy saving components used in buildings
and premises. The HRV unit is a component unit and is not designed for independent operation.
The unit is designed for creating continuous air exchange by means of mechanical ventilation in
private residences, oces, hotels, cafes, conference rooms. In addition the unit enables recovery of
the waste heat energy contained in the extract air to warm up the clean supply air.
The transported medium must not contain any combustible or explosive mixtures, chemical
fumes, coarse dust, soot, fat or any environment prolic for the formation of harmful substances (toxic
substances, dust and pathogens) as well as sticky substances and brous materials.
The unit is not intended for operation by children or any persons with reduced
physical, mental or sensory capacities as well persons lacking the required training.
The unit must be handled only by properly qualied personnel after the
appropriate safety brieng.
The installation are of the unit must be chosen to prevent access by unattended
children.

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VU..2 250 P EC
VU..2 250 P EC
STRUTURAL DESIGNATION KEY
VUT 2 250 P EC
Motor type
electronically commutated
Capacity, m³/h
Unit Type
VUT – unit with sensible heat recovery heat exchangers
Design Features
P – suspension-type
Number of heat exchangers, units
VUE – unit with latent heat recovery heat exchangers;
VUTE – unit with a sensible heat recovery heat exchanger and latent heat recovery
heat exchanger.
Fig. 1. Outside and connecting dimensions of the unit
864
766
51863
370
250
46*
46*
211
ø124
ø12
* - only for VUT2 250 P YEC and VUTE2 250 P YEC.
TECHNICAL DATA

5
SAFETY REQUIREMENTS
While operating and mounting the unit consider the requirements of the present operation manual
as well as general requirements of all applicable local and national building and electrical codes and
standards.
The unit must be grounded!
Before connecting the unit to power mains make sure that the unit is free of any visible damages
or any other foreign objects inside the casing that can damage the impeller blades. Otherwise contact
the service center.
Warning!
Disconnect the unit from power supply prior to any mounting, servicing, connection
or repair operations with the unit.
The unit is designed for operation in an enclosed area at ambient temperatures from +1ºC
to + 60 ºC at relative humidity of up to 80%.
Hazardous parts access and water ingress protection standard:
Unit motors - IP 44;
Unit assembly connected to air ducts - IP 22.
The unit series designations, their main outside and connecting dimensions, appearance and
technical parameters are given on Figure 1 and in Table 1.
The unit design is regularly being improved, so some models can slightly dier from those ones
described in this manual.
Model VU..2 250 P EC
Ventilation mode MIN NORMAL MAX
Unit voltage 50 Hz [V] 1 ~ 230
Max. fan power [W] 25 65 130
Fan current [A] 0,21 0,48 0,87
Max. air capacity, m3/h 108 186 250
Rotation speed [min -1] 1420 2410 2930
Noise level, 3 m [dB(A)] 26 34 39
Transported air temperature [°C] from -25 ° C to +60 C
Casing material Aluzinc
Insulation 10 mm celled polypropylene
Filter: extract/supply pocket-type G4
Connected duct diameter [mm] ø 125
Weight [kg] 17
Heat recovery eciency up to 88%
Heat exchanger type cross-ow, 2 pcs.
Table. 1. Technical parameters of the unit

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VU..2 250 P EC
VU..2 250 P EC
RESTRICTIONS
• Do not operate the unit beyond the specied temperature range or in an aggressive
and explosive medium!
• Do not connect clothes dryers or similar equipment to the ventilation system!
• Do not operate the unit in the air and dust mixture medium!
DESIGN AND OPERATING LOGIC
The unit design and operating principle are shown on Fig. 2. The warm stale air from the premises
enters the unit where it is stripped of impurities in the lter. The air is then extracted through the heat
exchangers and further outside by means of the exhaust fan via the air ducts. The fresh cool outdoor
air is supplied into the unit via the air ducts and undergoes ltration. The air then passes through the
heat exchanger and is delivered into the premises by the supply fan. The exchangers ensure energy
exchange between the warm stale air from indoors with the cool fresh air from outdoors without
mixing both air ows.This technology reduces heating costs in cold season, and cooling costs in warm
season.
The unit design and operating principle are given on Fig. 2. The basic conguration
includes:
1. Exhaust turbine.
2. Supply turbine.
3. Cross-ow plate heat exchanger
- for VUT2 250 P EC unit - sensible heat exchanger - 2 pcs.
- for VUTE2 250 P EC unit - sensible heat exchanger - 1 pcs. and latent heat exchanger - 1 pcs.
- for VUE2 250 P EC unit - lathent heat exchanger - 2 pcs.
4. Exhaust air lter class G4.
5. Supply air lter class G4.
6. Condensate drain pan:
- for VUT2 250 P EC units - 2 pcs.
- for VUTE2 250 P EC - 1 piece.
- VUE2 250 P EC units are not equipped with a condensate drain pan.
7. Condensate drain pipe:
- for VUT2 250 P EC units - 2 pcs.
- for VUTE2 250 P EC - 1 piece.
- VUE2 250 P EC are not equipped with a condensate drain pipe.
8. - Automatic unit.
33 5
1
6
4
SUPPLY AIR
EXTRACT AIR
7
2 8 6 7
INTAKE AIR
EXHAUST AIR
Fig. 2. Design and operating logic

7
MOUNTING AND SETUP
While installing the unit ensure convenient access for subsequent maintenance or repair.
The units are mounted to the ceiling using belts rigidly attached to a horizontal surface (Fig. 3)
or threaded rods which are securely installed in threaded expansion bolts driven into the ceiling.
Prior to installation make sure that the casing is free from any foreign objects such as wrapping lm
or paper.
For best results position the unit so as to allow a direct air duct section at least 1 m long in front
and behind.
Fig. 3. Unit installation
min 40 mm
CONDENSATE DRAINAGE
The condensate drain pan installed in the heat recovery section has pipes for extracting the
condensed uid outside the unit.
Connect pipe 1, U-trap 3 (not included in delivery package) and sewage collection system 5
with metal, plastic or rubber pipes 2 and 4. The pipe pitch must be at least 3°. Fill up the system with
water before connecting the unit to the power mains! During the operation the U-trap must be lled
with water at all times. Make sure that the water ows freely into the sewage collection system or
otherwise condensed water may build up in the unit during the heat exchanger operation which, in
turn, may cause equipment failure and water ingress into the premises.

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VU..2 250 P EC
VU..2 250 P EC
Fig. 4. Condensate drainage
321 4 53 2 145
The condensate drainage system is designed for normal operation in premises with air
temperatures above 0 °C. If the expected air temperatures are below 0 °C the condensate drainage
system must be equipped with heat insulation and pre-heating facilities.
The unit connects to 230 V / 50 Hz single-phase AC mains. Proper connection is ensured by the
power cable with a Euro plug supplied by the manufacturer.
The unit must be connected to the power mains via an automatic cut-out switch built into the
stationary wiring with a magnetic breaker with the nominal trip current at least equal to the unit
consumption current (see Table. 1).
Disconnect the unit from the power supply prior to any work.The unit must be
plugged into a properly installed power socket with an earthed terminal. The nominal
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.
CONNECTION TO POWER MAINS

9
UNIT CONTROL
Fig. 5 . Control panel
MIN
the Setup mode button
Ventilation mode selection button
Flow Rate Down button in the Setup mode
(disabled in the Operation mode)
Flow Rate Up button in the Setup mode
(disabled in the Operation mode)
Indicator Operation/Setup
Indication of main ventilation modes
(in the Setup mode the min ow speed is displayed)
is disabled
The unit is controlled from the control panel (Fig. 5).
1. Ventilation Mode Selection.
The unit oers three ventilation modes:
MIN - basic ventilation mode. The air ow rate for this mode is set in the Setup mode from
according to Table 3 (see p.2 «Setup Mode»). ;
NORMAL - the air ow rate in this mode is 80 m³/h higher than in the MIN mode. After 30
minutes the unit automatically reverts to the MIN mode;
MAX - the unit will run at its maximum air ow capacity. The ventilation modes are
indicated according to Table. 2.
Use button to cycle between the ventilation modes. The modes are engaged cyclically.

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VU..2 250 P EC
VU..2 250 P EC
2. Setup Mode.
To enter the Setup Mode press and hold the button (Fig. 5) for at least 10 seconds until the
Operation/Setup indicator changes from green to red.
The main ventilation mode indicators will then display the minimum air ow rate corresponding to
speed one according to Table 3.
To change the air ow rate use button. Press button to increase the parameter value or press
button to decrease it. The air ow rate being set can be controlled by means of six main ventilation
mode indicators provided that the Operation/Setup indicator glows red.
You can leave the Settings mode in two ways. Either press button or button once again
or this will happen automatically 60 seconds after the last pressing of button or button .
The Operation/Setup indicator will then change colour from red to green.
After leaving the Setup mode the minimum ow rate value setting remains in the memory even
after power-o.
Mode Indicator combination Operation mode
MIN Minimum ow rate
Unlimited time
NORMAL Minimum ow rate + 80 m³/h
Time: 30 minutes.
MAX Maximum ow rate
Unlimited time
Table 2. Ventilation mode display on the control panel

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No. Indication Flow Rate, m³/h
190
2105
3120
4135
5150
6165
7180
8195
9210
Table 3.

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VU..2 250 P EC
VU..2 250 P EC
4. Control panel connection.
Fig. 6 . Control panel - port side view
1234
The connection port side view of the control panel is given on Fig.6.
Fig. 7. Unit wiring diagram
Power lead-in 230 VAC
AC/DC unit HTS-150-48
Exhaust fan
Supply Fan
Red
Red
White White
White
White
White
White
Green
Green
Brown
Brown
Brown
Brown
Sensor
Control panel
Yellow Yellow
Yellow
Yellow
Circuit
Circuit
Circuit
Circuit
Circuit
Circuit
Circuit
Contact
Contact
Contact
Contact
Contact
Contact
Contact
Contact
Circuit
Sky blue Sky blue
Control board
1 - Control voltage U_EC1;
2 - Control voltage U_EC2;
3 - Supply voltage +12V;
4 - Negative power lead.
The wiring diagram of the unit is given on Fig. 7
5. Heat exchanger Frost Protection.
The system heat exchangers are equipped with frost protection which disables the supply fan when
the temperature in the exhaust duct downstream of the heat exchangers reaches +5 °C.

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MAINTENANCE
The unit must undergo technical maintenance 3 or 4 times a year. The technical maintenance
includes general cleaning of the unit and the following operations:
1. Filter service (3-4 times a year).
Contaminated lters increase air resistance thus impairing supply air delivery into the premises. The
lters should be cleaned as they get dirty, but at least 3-4 times a year. Use a vacuum-cleaner to remove
the contamination or use a new lter. New lters can be purchased from your dealer.
Filter replacement (Fig. 8):
p. 1. Release the latches and remove the bottom panel.
p. 2. Turn the latches and remove the condensate drain pan(s).
p. 3. Turn the latches and remove the lters.
3. Fan Inspection (once a year).
Even regular technical maintenance may not completely prevent dirt accumulation in the fans
which impairs supply air delivery into the premises.
Clean the fans with rugs or a soft brush. Do not use water, aggressive solvents or sharp objects as
they may damage the impeller.
Filter replacement (Fig. 8):
p. 1. Release the latches and remove the bottom panel.
p. 2. Turn the latches and remove the condensate drain pan(s).
p. 3. Turn the latches and remove the heat exchangers.
4. Condensate drain check (once a year).
The condensate 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, if necessary.
5. Fresh Air Supply Duct Check (twice a year).
The supply duct grill may get clogged by leaves and other objects impairing the unit performance
and supply air delivery. Check the supply duct grill twice a year and clean it, if necessary.
6. Duct System Check (every 5 years)
Even regular technical maintenance of the unit may not completely prevent dirt accumulation in
the air ducts which impairs the unit performance. The air duct maintenance includes their periodic
cleaning or replacement.
7. Control Unit Maintenance (if necessary)
The control unit must be serviced by an expert qualied for unassisted operations with
electrical installations up to 1,000 V and after careful study of the present operation manual.
Disconnect the unit from the power mains prior to the control unit maintenance.
Control unit maintenance (Fig. 9):
1. Remove eight self-tapping screws securing the control unit lid.
2. Remove the control unit lid.

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VU..2 250 P EC
VU..2 250 P EC
Fig. 9. Control unit maintenance
1 2
Fig. 8. Filter and heat exchanger maintenance
1 2
3 4

15
FAULT HANDLING
Problem Possible reasons Fault handling
Fan (Fans)
will not start
The unit is not connected to the
power mains.
Make sure that the unit is properly
connected to the power mains and make
any corrections, if necessary.
Supply air
too cold
Clogged exhaust lter. Clean or replace the exhaust lter.
Ice buildup in the heat exchanger.
Check for ice in the heat exchanger. If
there is ice in the heat exchanger let it
melt before switching the unit back on.
Low air ow
Filter, fan or heat exchanger
clogging.
Clean or replace the lters; Clean the fans
and the heat exchanger.
Air handling system clogged or
damaged.
Check for unobstructed diuser opening,
check the exhaust cowl and the supply
duct grill and clean them, if necessary;
Make sure that the air ducts are clean and
intact.
Noise and
vibration
Fan impellers are dirty. Clean the fan impellers.
Fan fastening bolts are loose. Make sure the fastening screws are tight.
Water leakage The drain line is clogged,
damaged or improperly arranged.
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.
Possible Malfunctions and Fault Handling

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VU..2 250 P EC
VU..2 250 P EC
STORAGE ANDTRANSPORTATION RULES
Store the unit in the manufacturer’s original packing box in a closed ventilated premise with
temperature range from +10°C to +40°C and relative humidity less than 80% (at +20°C).
Vapours or particles which can cause corrosion or damage the insulation or connection tightness
are not allowed in the storage environment.
Use hoist machinery for handling and transportation to prevent possible mechanical damages of
the unit. Fulll the requirements for transportation of the specied cargo type during cargo-handling
operations.
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.
MANUFACTURER’S WARRANTY
WARRANTY CLAIMS ARE ACCEPTED WITH THIS USER’S MANUAL AND FILLED
CONNECTION CERTIFICATE ONLY.
The MANUFACTURER is not responsible for any mechanical or physical
damages resulting from the manual requirements violence, the unit misuse or gross
mechanical eect.
Fulll the requirements set in the user’s manual to ensure proper functioning
of the unit.
Manufacturer hereby guarantees normal performance of the unit during two years from the
date of retail sale provided compliance with transport, storage, mounting and operation regulations. In
case of no conrmation of the sales date the warranty period is calculated from the manufacturing date.
In case of failures in the unit operation during the warranty period the manufacturer will
accept reclamations and complaints from the owner of the device only after receiving technically sound
act with detailed description of the failure.
Unit damage as a result of unauthorized tampering with the circuit diagram is not a warranty
case.
For warranty and post-warranty services of the unit please contact the product manufacturer.
In case of warranty claim please submit the present user’s manual with the seller’s stamp, lled
connection certicate and warranty card. Warranty repair services and post-warranty services are
fullled at the manufacturing facility.

17
has been duly certied as serviceable.
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.
Acceptance Inspector’s Stamp Date of manufacture ___________________________
Sold by
Name of trade company and retailer’s stamp ______________________________________________
___________________________________________________________________________________
Date of sale _____________________________
The air handling unit with heat recovery VU ___ 2 250 P EC
ACCEPTANCE CERTIFICATE
ELECTRICAL CONNECTION CERTIFICATE
WARRANTY CARD
Company:
Name
Date Signature
This is to certify that the air handling unit VU ___ 2 250 P EC has been connected to power mains
pursuant to the requirements stated in the present user’s manual by a qualied technician:

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VU..2 250 P EC
VU..2 250 P EC

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V83EN-03