Vents Micra 150 E User manual

User Manual
Micra 150 E
Air handling unit
with heat recovery

2Micra 150 E
Introduction
Use
Delivery set
Structural designation key
Technical data
Safety requirements
Structure and operating logic
Mounting and set-up
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
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CONTENT

3
The present user manual consisting of technical details, operating instructions and technical specication covers the installation of
the MICRA 150 E air handling unit with heat recovery, VENTS series (hereinafter referred as the unit).
INTRODUCTION
The unit is designed to save thermal energy by means of heat recovery and is one of the energy saving components used in buildings
and premises.
The unit is designed to provide permanent controllable air exchange by 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 air handling unit is a component unit and is not designed for independent operation.
Transported medium must not contain any ammable or explosive mixtures, evaporation of chemicals, coarse dust, soot and oil
particles, sticky substances, brous materials, pathogens or any other harmful substances.
USE
DELIVERY SET
TECHNICAL DATA
THE UNIT IS NOT DESIGNED TO BE USED BY CHILDREN, PHYSICALLY OR MENTALLY DISABLED
PERSONS, PERSONSWITH SENSORY DISORDER ORWITH NO APPROPRIATE EXPERIENCE OR EXPERTISE.
THE UNIT MUST BE HANDLED ONLY BY PROPERLY QUALIFIED PERSONNEL AFTERTHE APPROPRIATE
SAFETY BRIEFING.
INSTALL THE UNIT TO BE OUT OF REACH OF CHILDREN.
Unit - 1 item;
Remote controller - 1 item;
User manual - 1 item;
Master plate - 1 item;
Fasteners (dowel 8x80 and countersunk-headed screw) - 4 items;
Shipping box - 1 item.
STRUCTURAL DESIGNATION KEY
MICRA 150 E
Unit name
Air capacity [m3/h]
Posistor electric heater
The unit is designed for operation in an enclosed area at ambient temperatures from +1 °C to + 40 °C at relative humidity of up to 80%.
The unit must be grounded!
Hazardous parts access and water ingress protection standard:
Unit motors - IP 44;
Unit assembly connected to air ducts - IP 22.
The unit series designations, the main overall and connecting dimensions, outer view and technical data are given in g. 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.

4Micra 150 E
Fig. 1. Unit overall and connecting dimensions
580
87
500 200
125 255
122,5122,5
260
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.
WARNING!
DISCONNECT THE UNIT FROM POWER SUPPLY PRIORTO ANY MOUNTING,
SERVICING, CONNECTION OR REPAIR OPERATIONS WITH THE UNIT.
SAFETY REQUIREMENTS
Type Микра 150 Э
Unit voltage 50 Hz [V] 1 ~ 230
Max. fan power [W] 9 16 40
Electric heater power [W] 350
Electric heater current [A] 1,6
Total unit power [W] 390
Total unit current [A] 1,68
Max. air capacity [m3/h] 60 105 150
Rotation speed [min -1] 450 780 2000
Уровень звукового давления на расст. 3м, dB(A) 30 35 38
Max. transporting air temperature [°C] from -25 up to +50
Casing material polymer coated steel
Insulation 10 mm foam rubber
Heat recovery eciency, % 60 - 80
Heat exchanger type counter-ow
Heat exchanger material polystyrene
Filter: Supply G4
Extract G4
Connected duct diameter [mm] Ø 125
Weight [kg] 20
Table. 1. Technical parameters of the unit

5
RESTRICTIONS!
• DO NOT OPERATE THE UNIT BEYOND THE SPECIFIED 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!
STRUCTURE AND OPERATING LOGIC
The unit operating principle is as follows (g. 2). Warm stale air from the premises extracted by the unit is puried in the extract lter,
then it passes through the heat exchanger and then is exhausted outside through the ducts by the exhaust fan.
Clean cold intake air supplied to the unit is puried in the supply lter.
The air passes through the heat exchanger and then fed into the premises by the supply fan.
Thermal energy of warm extract air is transferred to clean intake fresh air from outside and warms it up.The air ows are fully separated.
Heat recovery minimizes thermal energy losses, energy demand and operating costs for heating during winter time.
The unit is equipped with a posistor 350 W electric heater to enable supply air warming up. The heater has overheating protection.
Fig. 2. Design and operating logic
EXTRACT FAN
Extract air
Supply air
Intake air
Exhaust air
SUPPLY FILTER
DRAIN PAN
HEAT EXCHANGER
SUPPLY FAN
POSISTOR ELECTRIC HEATER
EXTRACT FILTER

6Micra 150 E
MOUNTING AND SETUP
Mount the unit to provide enough access for maintenance or repair operations. The wall for mounting must have even surface. Any
surface irregularities will lead to unit casing skew and may prevent the unit from operating properly. The minimum distances from the
unit to the mounting surfaces are shown in g. 3.
Fig. 3. Minimum distance from the unit to the surfaces
min 300 mm min 300 mm
The unit is designed for installation directly in the premise to be ventilated. Prior to starting mounting operations mark and bore
holes in the wall with the master plate, g. 4.
Mounting sequence with the master plate, g. 5:
1. Fix the master plate on the wall with a self-adhesive tape at required level.
2. Indicate two marks for two holes Ø130 mm for air ducts and four holes Ø 8 mm for the unit fasteners.
3. Take o the master plate and drill through holes for the air ducts and holes, 90 mm deep for the unit fasteners. Insert the dowels,
remove the perforated llers for the air ducts from the master plate and re-install the master plate back using a self-adhesive tape.
4. Insert the air ducts into the respective openings in the master plate.
5. Fill the spaces between the air ducts and the wall with a mounting foam through the specially designed holes in the master plate.
Wait till a mounting foam hardens (solidication time depends on the foam mark), take o the master plate and remove the foam excess.
Cut o the protruding air duct parts to be ush with the wall surface.
6. Insert the unit spigots to the air ducts.
7. Open the access door in the unit and remove the heat exchanger.
8. Mount the unit to the wall with the countersunk head screws and 8x80 dowels (included into delivery set) into two Ø 8 mm holes.
9. Install the heat exchanger and close the access door.
10. Fix the outer ventilation box (not included into delivery set) or Ø 125 mm ventilation grille on the outer wall of the building.
Fig. 4 Master plate
2 holes for Ø 125 mm air duct.
Fill the gaps between the wall and the air
ducts with a mounting foam.
2 holes for Ø 125 mm air duct.
Fill the gaps between the wall and the air
ducts with a mounting foam.
Drill 4 holes with Ø 8 tool for 90 mm deep
as per master plate.
Drill 4 holes with Ø 8 tool for 90 mm deep
as per master plate.
Point for cable rounding
inside the unit.
Point for cable rounding
inside the unit.
497
420
255
38,5
180
85
145
190
545 575

7
Fig. 5. Unit mounting with the master plate
Fig. 6. Unit mounting
1. 2. 3.
4. 5. 6.
7. 8. 9.
UNIT
TWO Ø 125 MM AIR DUCTS
FOUR DOWELS WITH A SCREW
FOUR DOWELS WITH A SCREW
(INCLUDED INTO OUTER BOX DELIVERY
SET)
OUTER BOX

8Micra 150 E
CONNECTION TO POWER MAINS
DISCONNECT THE UNIT FROMTHE POWER MAINS PRIOR TO ANY OPERATIONS.
THE UNIT MUST BE PLUGGED INTO A PROPERLY INSTALLED POWER SOCKET
WITH AN EARTHED TERMINAL.
THE RATED ELECTRICAL PARAMETERS OF THE UNIT ARE SHOWN ON THE
RATING PLATE.
ANY TAMPERING WITH THE INTERNAL CONNECTIONS IS PROHIBITED AND
WILL VOID THE WARRANTY.
The unit is designed for connection to 230 V / 50 Hz single-phase AC mains.
The unit is supplied with a power cable and a plug. The unit must be connected to power mains through a grounded power socket
compliant with IEC 60884-1. The power cable is pre-wired to the terminal block X1 by the manufacturer, g. 7.
Connect the unit to power mains through the external automatic circuit breaker integrated into the xed wiring system. Install the
circuit breaker to have a free quick access in case of need to turn the unit o promptly.
The circuit breaker trip current must be in compliance with the current consumption. The recommended circuit breaker rated current
is 2.5 A. While selecting the automatic circuit breaker consider the maximum wire temperature that depends on the wire type, insulation,
length and layout way (open wire mounting, channel type or wall-mounted).
Fig. 7. Power cable connection to terminal block
UNIT
1
L
LN PE
XP3
X1
NPELA
23 45 6
~ 230 V / 50 Hz
UNIT CONTROL
Fig. 8. Control panel and remote controller
Unit on/o
Mode control buttons
(see description below)
Fan speed control buttons
Remote controller
Remote Controller
Unit on/o
Fan speed up
Heater on
Heater o
Fan speed down
Low speed on High speed on
Medium speed on
Scheduled
operation on
Timer on/o
Control panel

9
The unit is controlled from the control panel as well as from the remote controller, g. 8.
1. Turning unit ON/OFF
To turn the unit ON/OFF:
from the control panel: press the button Turning unit ON/OFF ;
from the remote controller: press the button Turning unit ON/OFF .
Fig. 9. Display of the turned o unit
Fig. 10. Display in turned ON
The display shows the following indications as the unit is turned o,
g. 9:
Indoor temperature;
Weekday;
Time;
OFF indication ;
When air supply to the heating elements is activated, the
and indicator glows. Synchronously,
countdown of the air supply to the heater time starts (min : s).
The panel shows the following indications as the unit is turned on,
g. 10:
Indoor temperature;
Weekday;
Time;
Fan speed indicator ;
Timer status information;
• The indicator is displayed as the timer
is turned on.
• The indicator is displayed as the
timer is turned o.
Heater status. If the heater is turned on, the indicator is
displayed.
2. Unit ventilation mode control.
The unit fan speed is controlled:
From the control panel: press the button for setting speed up or the button for setting speed down (low speed - medium
speed - high speed);
From the remote controller: press the button for setting speed up or the button for setting speed down (low speed -
medium speed - high speed);
From the remote controller: press the button to activate low speed, the button to activate medium speed and the button
to activate high speed.
The control panel displays the current fan speed:
Indicator — low speed mode;
Indicator — medium speed mode;
Indicator — high speed mode.
3. Supply air warming up.
The electric posistor heater warms up supply air during cold season.
To turn the heater ON/OFF:
From the control panel: press and hold the button and then press the button .
From the remote controller: press the button to turn the heater on, press the button to turn the heater o.

10 Micra 150 E
WARNING!
IF THE HEATER IS ON, THE UNIT CAN BE TURNED OFF ONLY AFTER 20
SECONDS AFTER TURNOFF COMMAND TO ENSURE THE HEATER COOLING. IN
THIS CASE THE INDICATOR IS DISPLAYED.
4. Timer.
The timer is designed to switch the fans to maximum speed with subsequent automatic reset to a previous speed after set time period, from
20 to 60 minutes.
To turn the timer on/o:
from the control panel: press and hold the button and then press the button . Press the button once to set the timer for 20
minutes, each subsequent pressing extends the timer setting for 10 minutes. The maximum timer setting is 60 minutes. Press and hold the
button for 3 seconds to turn the timer o;
from the remote controller: press the button to turn the timer for 20 minutes on. To turn the timer o press the button
or .
5. Heat exchanger freezing protection.
If exhaust air temperature downstream of the heat exchanger is below +3 °C , the supply fan is turned o. After supply air temperature
rises above +3 °C, the unit reverts to the set operating mode.
6. Unit setup modes.
READJUSTMENT OF THE UNIT SETTINGS RESULTS IN LOSS OF THE FACTORY
SETTINGS!
FAN SPEED AND TEMPERATURE SENSOR SETUP IS POSSIBLE ONLY FROM THE
WALLMOUNTED CONTROL PANEL!
Fan capacity setup mode.
The capacity of low, medium and high speeds are adjustable. To enter the fan speed setup mode, turn the unit o. Then press and hold
the button on the control panel and hold the button pressed for 3 seconds.
Fig. 11. Fan speed setup
Access to the setup mode is conrmed by the indicator
and g. 11 on the control panel display.
To select the required speed to be adjusted use the buttons
and .
During fan speed setup the selected speed is displayed by the
indications , or .
To adjust the supply fan capacity press and hold the button and then press the button to set the fan speed up or the
button to set the fan speed down. Each pressing of the button and increases or decreases the supply fan by 1%. If the button
remains pressed the display indicators show the current supply fan speed, g. 12.
To adjust the supply fan speed press and hold the button and regulate the speed by the button for setting speed up and
the button for setting speed down. Each pressing of the button and increases or decreases the exhaust fan speed by 1%. If the
button remains pressed the display indicators show the current exhaust fan speed. To exit the fan speed setup mode and save changes
press the button .
Fan speed adjustment is not possible with the remote controller.

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To reset the unit to the factory settings, enter the fan speed setup
mode, synchronously press and hold the buttons and for 3
seconds.
Factory fan speed settings:
low speed — 40 %
medium speed — 70 %
high speed — 100 %
Fig. 12. Fan speed setup
Fig. 13. Filter replacement signal
7. Filter replacement signal.
As the lter service life expires (3000 hours) the control panel displays a lter replacement indicator , instead of the operating
temperature, g. 13.
In case of the lter replacement signal turn the unit
o with the button and disconnect it from power mains. Then
replace the lters following the lter replacement procedure in the
section «Technical maintenance», page 14.
After that press the button on the control panel or
the button on the remote controller to turn the unit on.
Then press synchronously the buttons and to reset the
motor meter.
8. Date and time setup.
Turn the unit o.
Press and hold the button , then press the button on the control panel to enter the date and time setup mode.
Keep the button , pressed and select a parameter to be edited using the buttons and . An editable parameter blinks.
The date and time setup parameters are located as listed:
1. Minutes;
2. Hours;
3. Weekday;
4. Date;
5. Month;
6. Year.
Then set the required parameter with the buttons and on the control panel.
Press the button to exit the date and time setup mode..
9. Time scheduled operation.
Press and hold the button , then press the button on the control panel to activate the time-scheduled operation. The
indicator conrms that the unit time-scheduled operation is activated.
Press and hold the button , and then press the button on the control panel to deactivate the time-scheduled operation.
Press the button on the remote controller to activate or deactivate the unit time-scheduled operation.
The timer control has higher priority with respect to the time-scheduled operation.

12 Micra 150 E
10. Time-scheduled operation setup.
Each weekday has four entries that determine the fan switching to the set fan speed, turning the heater on or o.
To enter the time-scheduled operation setup mode, turn the unit o with the button on the control panel or with the
button on the remote controller.
Press and hold the button on the control panel and the press the button .
Fig. 14. time-scheduled operation indicators
Weekday
Time
Entry
number Heater
status
Fans speed
— Heater OFF
— Heater ON
Hold the button and select a required parameter to be adjusted using the buttons and .
Set a required parameter using the same buttons and .
Time-scheduled operation parameters, g. 14:
• Entry number - each weekday has four entries.
• Weekday - setup of a weekday.
• Heater status - setup of the heater status for the current entry. - heater on, - heater o.
• Fan speed - setup of the fan speed for the current entry.
• Time - time setup for the current entry.
To copy the set entries for the next day press and hold the button and press the button . No copying from Sunday to
Monday is possible.
Press the button on the control panel or the button on the remote controller to exit the time-scheduled operation
setup mode.
A programming example for setup of the time-scheduled operation is stated in the table 2. The time-scheduled operation mode is
adjusted for warm season by default. While adjusting the time-scheduled operation mode set the heater status - .
Weekday
Entry number
1 2 3 4
Start
time Mode Heater status
Start
time Mode Heater status
Start
time Mode Heater status
Start
time Mode Heater status
Mo. 07:00 medium
speed O. 08:00 low speed O. 17:00 medium speed O. 22:00 low speed O.
Tu. 07:00 medium
speed O. 08:00 low speed O. 17:00 medium speed O. 22:00 low speed O.
We. 07:00 medium
speed O. 08:00 low speed O. 17:00 medium speed O. 22:00 low speed O.
Th. 07:00 medium
speed O. 08:00 low speed O. 17:00 medium speed O. 22:00 low speed O.
Fr. 07:00 medium
speed O. 08:00 low speed O. 17:00 medium speed O. 22:00 low speed O.
Sa. 10:00 medium
speed O. 12:00 medium speed O. 17:00 medium speed O. 23:00 low speed O.
Su. 10:00 medium
speed O. 12:00 medium speed O. 17:00 medium speed O. 23:00 low speed O.
Table 2. Programming example

13
11. Alarms.
In case of alarm the unit is turned o and the control panel display the alarm indicators, g. 15. The possible alarms are listed in the table
3.
Fig. 15. Alarm indication
Freeze protection
sensor breakout
Condensate drain pan is full
Temperature sensor alarm
Table 3. Unit alarms
ALARM INDICATION FAULT HANDLING
Temperature sensor
alarm Contact your Seller for servicing.
Duct temperature sensor
breakout
Contact your Seller to remove the freeze
protection temperature sensor.
Freeze protection sensor
breakout
Follow the drain pan servicing sequence,
"Maintenance section", page 14.

14 Micra 150 E
MAINTENANCE
The unit requires maintenance works 3-4 times per year.
Maintenance includes regular cleaning and the following operations:
1. Filter maintenance (3-4 timed per year).
Dirty lters increase air resistance in the system and reduce supply air volume. The lters require cleaning as they get clogged, but at least
once in 3-4 months. Vacuum cleaning is allowed. Replace the lters as they get clogged following the second cleaning.
Contact your seller for new lters. To remove the lters, follow the procedure in the g. 16:
1. Open the unit access door.
2. Remove the supply air lter above the heat exchanger;
3. Remove the heat exchanger from the unit by pulling its band;
4. Press the clamp and remove it;
5. Remove the extract air lter.
Install the lter in the reverse order.
2. Heat exchanger inspection (once per year).
Some dust can get accumulated 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 of the unit and ush it with warm soap or mild
detergent water solution. Re-install the dry heat exchanger to the unit.
3. Fan inspection (once per year).
Even in case of regular lter and heat exchanger maintenance, some dust and grease can get accumulated inside the fans and reduce
the fan performance and supply air ow.
Clean the fans with a soft cloth or brush. No water and abrasive detergent, sharp objects or solvents are allowed for cleaning to prevent
the impeller damage.
4. Condensate removal (as required).
The drain pipes may get lled with condensate during cold season. As the drain pan gets lled with condensate, the unit is turned on
and the control panel displays the indicator ( ) to remind about the need to remove the condensate.
To remove condensate:
1. Disconnect the unit from power mains.
2. Open the unit door.
3. Lift the condensate level switch.
4. Keep the condensate level switch, pull and remove the condensate drain pan carefully.
5. Empty the drain pan, lift the condensate level switch and re-install it back.
5. Supply air ow control (twice per year).
Leaves and other pollutions can clog the supply air grille and reduce the unit performance and supply air volume. Check the supply grille
twice per year and clean it as required.
6. Ductworks inspection (once in 5 years).
Even if you follow all the listed maintenance guidelines, some dust can get accumulated inside the air ducts and reduce the unit
performance. Duct maintenance means their regular cleaning or replacements.
Fig. 16. Filter maintenance
1. 2.
4. 5.
3.

15
Possible faults and fault handling
FAULT HANDLING
Problem Possible reasons Fault handling
The fans do not get started No power supply.
Make sure the power supply line is connected
correctly, otherwise troubleshoot the
connection error.
Cold supply air.
The extract lter is soiled. Clean or replace the extract lter.
The heat exchanger is frozen.
Check the heat exchanger for icing. Shut the
unit o if required and turn it on after the
freezing danger is no longer imminent.
The heater malfunction. Please contact your Seller for servicing.
Low set air ow.
The lters, the fans are soiled, the
heat exchanger is soiled.
Clean or replace the lters; clean the fans and
the heat exchanger.
The ventilation system is soiled or
damaged.
Check opening of the diusers and louvre
shutters, check the extract hood and supply
grille and clean it of required; make sure the
air ducts are not soiled and not damaged.
Noise, vibration The impeller is clogged. Clean the fan impeller.
Loose screw tightening. Tighten the screws to stop.
Water leakage. The condensate level switch mal-
function. Please contact your Seller for servicing.
STORAGE AND TRANSPORTATION RULES
MANUFACTURER’S WARRANTY
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l 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 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.
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 EFFECT.
FULFIL THE REQUIREMENTS SET IN THE USER’S MANUAL TO ENSURE PROPER
FUNCTIONING OF THE UNIT.

16 Micra 150 E
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
Seller’s name and stamp ___________________________________________________________________________________________
________________________________________________________________________________________________________________
________________________________________________________________________________________________________________
Date of sale _____________________________
The air handling uniT wiTh heaT recovery Micra 150 e has been duly certied as serviceable.
This is to certify that the air handling unit with heat recovery Micra 150 E has been connected to power mains pursuant to the
requirements stated in the present user’s manual by a qualied technician:
Company:_______________________________________________________________________________________________________
Name __________________________________________________________________________________________________________
Date____________________________________Signature________________________________________________________________
________________________________________________________________________________________________________________
________________________________________________________________________________________________________________
________________________________________________________________________________________________________________
______________________________________________________________________________________________________
______________________________________________________________________________________________________
______________________________________________________________________________________________________
______________________________________________________________________________________________________
______________________________________________________________________________________________________
______________________________________________________________________________________________________
______________________________________________________________________________________________________
______________________________________________________________________________________________________
_________________________________________________________________________________________________
ACCEPTANCE CERTIFICATE
ELECTRICAL CONNECTION CERTIFICATE
WARRANTY CARD

2013 V73-1EN-04