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EnErgy rEcovEry air handling unit
KOMFORT ERV D150
KOMFORT ERV D250
KOMFORT ERV D350
EN
USER‘S MANUAL
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CONTENTS
Contents
Safety requirements .....................................................................................................................................................................2
Purpose ................................................................................................................................................................................................ 4
Delivery set ........................................................................................................................................................................................ 4
Designation key .............................................................................................................................................................................. 4
Technical data .................................................................................................................................................................................. 5
Design and operating principle ........................................................................................................................................... 7
Mounting and set-up .................................................................................................................................................................. 9
Connection to power mains .................................................................................................................................................. 10
Technical maintenance .............................................................................................................................................................. 11
Troubleshooting ............................................................................................................................................................................. 12
Storage and transportation regulations .......................................................................................................................... 12
Manufacturer’s warranty ........................................................................................................................................................... 13
Certificate of acceptance .......................................................................................................................................................... 14
Seller information .......................................................................................................................................................................... 14
Installation certificate .................................................................................................................................................................. 14
Warranty card ...................................................................................................................................................................................14
KoMFort Erv d
This user’s manual is a main operating document intended for technical, maintenance, and operating staff.
The manual contains information about the purpose, technical details, operating principle, design, and installation of the KOMFORT ERV D
unit (-s) and all of its (their) 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.
The information in this user’s manual is 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.
No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in any form or by any means in any information
search system or translated into any language in any form without the prior written permission of the Company.
SAFETY REQUIREMENTS
• Please read the user’s manual carefully prior to installing and operating 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.
• The warnings contained in the user’s manual must be considered most seriously since they contain vital personal safety information.
• Failure to follow the rules and safety precautions noted in this user’s manual may result in an injury or unit damage.
• After a careful reading of the manual, keep it for the entire service life of the unit.
• While transferring the unit control, the user’s manual must be turned over to the receiving operator.
UNIT INSTALLATION AND OPERATION SAFETY PRECAUTIONS
• Disconnect the unit from power mains prior
to any installation operations.
• The unit must be grounded!
2
• Unpack the unit with care.
• While installing the unit, follow the safety
regulations specific to the use of electric
tools.
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KoMFort Erv d
• Do not change the power cable length at
• Do not use damaged equipment or cables
your own discretion. Do not bend the power
cable. Avoid damaging the power cable. Do
not put any foreign objects on the power
cable.
when connecting the unit to power mains.
www.blaubergventilatoren.de
• Do not lay the power cable of the unit in
close proximity to heating equipment.
• Do not operate the unit outside the
temperature range stated in the user’s
manual. Do not operate the unit in
aggressive or explosive environments.
• Do not touch the unit controls with wet
hands. Do not carry out the installation and
maintenance operations with wet hands.
• Do not allow children to operate the unit.
• Do not store any explosive or highly
flammable substances in close proximity to
the unit.
• Do not open the unit during operation.
• Do not block the air duct when the unit is
switched on.
• Do not wash the unit with water. Protect the
electric parts of the unit against ingress of
water.
• Disconnect the unit from power mains prior
to any technical maintenance.
• When the unit generates unusual sounds,
odour, or emits smoke, disconnect it from
power supply and contact the Seller.
• Do not direct the air flow produced by the
unit towards open flame or ignition sources.
• In case of continuous operation of the unit,
periodically check the security of mounting.
• Do not sit on the unit and avoid placing
foreign objects on it.
THE PRODUCT MUST BE DISPOSED SEPARATELY AT THE END OF ITS SERVICE LIFE.
DO NOT DISPOSE THE UNIT AS UNSORTED DOMESTIC WASTE.
• Use the unit only for its intended purpose.
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KoMFort Erv d
PURPOSE
The unit is designed to ensure continuous mechanical air exchange in houses, offices, hotels, cafes, conference halls, and other utility
and 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 intake 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 SHOULD NOT BE OPERATED BY CHILDREN OR PERSONS WITH REDUCED
PHYSICAL, MENTAL, OR SENSORY CAPACITIES, OR THOSE WITHOUT
THE APPROPRIATE TRAINING.
THE UNIT MUST BE INSTALLED AND CONNECTED ONLY BY PROPERLY QUALIFIED
PERSONNEL AFTER THE APPROPRIATE BRIEFING.
THE CHOICE OF UNIT INSTALLATION LOCATION MUST PREVENT UNAUTHORIZED
ACCESS BY UNATTENDED CHILDREN.
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
Air handling unit 1 pc.
User’s manual 1 pc.
Controller 1 pc.
Packing box 1 pc.
DESIGNATION KEY
KOMFORT ERV D 150 L S1
Controller
S1 — speed controller CDT(E) E1.8
S12 — sensor control panel SGS E1
S20 — speed controller CDT1 E2.5
Modication
L — left-handed
R — right-handed
Rated air ow [m
150/250/350
Mounting features
Suspended, horizontal spigot orientation
Series
KOMFORT ERV — ventilation with energy recovery
3
/h]
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TECHNICAL DATA
The unit is designed for indoor application with the ambient temperature ranging from +1 °C up to +40 °C and relative humidity up to 80 %.
In order to prevent condensation on the internal walls of the units, it is necessary that the surface temperature of the casing is 2-3 °C higher
than the dew point temperature of the transported air.
The unit is rated as a Class I electrical appliance.
Hazardous parts access and water ingress protection rating:
• IP22 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.
Parameter
KOMFORT ERV D150 KOMFORT ERV D250 KOMFORT ERV D350
Unit supply voltage, 50 Hz [V ] 1~ 230
Maximum unit power [W ] 125 250 310
Maximum unit current [A] 0.6 1.1 1.4
Maximum flow rate [m
RPM [min
-1]
3
/h] 230 370 400
2235 2400 2150
Sound pressure level at 3 m distance [dBA] 49 52 57
Transported air temperature [°C] -25...+40
Casing material Painted steel
Insulation Foamed rubber, 5 and 10 mm
Extract filter G4
Supply filters G4 and F8 (PM2.5 93 %) G4 and F8 (PM2.5 83 %) G4 and F8 (PM2.5 87 %)
Connected air duct diameter [mm] 100 150 150
Heat recovery efficiency [%] 72–87 66–76 71–87
Humidity recovery efficiency [%] 27–47 22–32 23–40
Heat exchanger type Cross-flow
Heat exchanger material Enthalpy
Weight [kg] 26 29 42
SEC class D E E
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B2
B
B1
KoMFort Erv d
ØD
A2
A1
A
L4
L3
B
L2LL1
A
L2 L L1
A B
Model
H
H1
Dimensions [mm]
Ø D A A1 A2 B B1 B2 H H1 L L1 L2 L3 L4 L5
KOMFORT ERV D150 99 947 854 676 704 743 793 227 247 480 92 128 25 113 138
KOMFORT ERV D250 149 947 854 676 704 743 793 227 247 480 92 128 25 113 138
KOMFORT ERV D350 149 1117 1024 846 754 793 843 277 297 488 109 153 50 88 138
L5
L3
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R
Thermostat for heat exchanger freeze protection
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DESIGN AND OPERATING PRINCIPLE
Left-handed modication
Power cord with a plug
Controller
Cable glands
Control unit
Supply fan
Extract fan
Cross-ow heat exchanger
Extract air lter
Supply air lter
Inspection hatch for lter and heat
exchanger maintenance
The service side of the unit is equipped with a detachable inspection hatch on manual bolts for filter and heat exchanger cleaning and
replacement operations. The plate enthalpy cross-flow heat exchanger is made of polymerized cellulose.
The control unit is positioned inside the unit casing . The power cable and grounding cables are connected to the control unit via the
cable gland located at the side of the unit. The unit is equipped with a controller and a power cord with a Euro Plug XP.
Warm stale extract air from the room flows into 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. Cold fresh air from the outside flows into the unit, where it is cleaned by the
supply filter. Then the air flows through the heat exchanger and is directed to the room with the supply fan.
Supply air is heated in the heat exchanger by transferring the heat energy of warm and humid extract air to the cold fresh air.
The air flows are fully separated while flowing through the heat exchanger. Heat recovery minimizes heat losses, which reduces the
cost of space heating in the cold season. The enthalpy heat exchanger provides both heat and humidity recovery.
In warm seasons the heat exchanger operates to cool down and dehumidify the supply air. In cold seasons the heat exchanger
operates to warm up supply air and humidify it. Water vapour from the humid extract air is condensed and absorbed by the heat
exchanger plates. The recovered humidity and heat are transferred to the supply air flow. The air streams are fully separated within the
heat exchanger and the microbes and smells are isolated.
LEFT-HANDED AND RIGHT-HANDED MODIFICATIONS
The figure below shows the arrangement of spigots for left- and right-handed modifications. Choosing the right arrangement can
improve the ease of installation, shorten the length of the ducts and reduce the number of air duct bends (elbows)
Left-handed modification Right-handed modification
SUPPLY AIR
EXTRACT AIR
EXHAUST AIR
INTAKE AIR
EXHAUST AIR
INTAKE AIR
SUPPLY AIR
EXTRACT AIR
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KoMFort Erv d
The provide heat exchanger freeze protection during the cold season, the unit is equipped with a thermostat that is installed in the
exhaust air duct downstream of the heat exchanger. The Defrosting mode is activated when the exhaust air temperature is +3 ˚C.
After temperature increase the unit returns to the previous operation mode.
In the Defrosting mode the supply fan is turned off and the heat exchanger is warmed up with warm extract air flow.
To set the thermostat threshold value, turn the control knob to the desired position.
The recommended thermostat operating temperature is +3 °C (factory setting).
Left-handed modification Right-handed modification
SUPPLY AIR
EXTRACT AIR
EXHAUST AIR
INTAKE AIR
EXHAUST AIR
INTAKE AIR
SUPPLY AIR
EXTRACT AIR
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MOUNTING AND SETUP
READ THE USER'S MANUAL BEFORE INSTALLING THE UNIT.
WHILE INSTALLING THE UNIT ENSURE CONVENIENT ACCESS FOR SUBSEQUENT
MAINTENANCE AND REPAIR.
The unit is designed for suspended ceiling mounting with anchor threaded rods, nuts and anti-vibration rubber.
Fasteners for fan mounting are not included in the delivery set and should be ordered separately.
While choosing fasteners consider the material of the mounting surface as well as the weigh of the unit, refer to the Technical data
section. Fasteners for unit mounting should be selected by a qualified specialist! Before mounting make sure the casing does not
contain any foreign objects (e.g. foil, paper).
The minimum distance between the unit and the ceiling should be at least 20 mm.
To attain the best performance of the unit and to minimise turbulence-induced air pressure losses, connect the straight air duct section
to the spigots on both sides of the unit while mounting.
Minimum straight air duct length:
• equal to 1 air duct diameter on the intake side
• equal to 3 air duct diameters on outlet side
If the air ducts are too short or not connected, protect the unit parts from ingress of foreign objects.
To prevent uncontrollable access to the fan, the spigots may be covered with a protecting grille or other protecting device with mesh
width not more than 12.5 mm.
min 20 mm
Threaded rod
Vibration absorbing rubber
Washer
Nut
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KoMFort Erv d
CONNECTION TO POWER MAINS
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 unit is rated for connection to 1~ 230 V/50 Hz power mains.
• The unit must be connected to power mains using insulated electric 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 electric
circuit in case of overload or short-circuit. The circuit breaker installation place must provide quick access for emergency shutdown
of the unit. The trip current of the automatic circuit breaker QF must exceed the maximum current consumption of the unit (refer
to the technical data table). The recommended trip current of the circuit breaker is the next current in the standard trip current row
following the maximum current of the connected unit. The automatic circuit breaker is not included in the delivery set.
Wiring diagram
(unit with an S1 controller)
857 6 5 4 3 2 1
Х1
4 3 2 1 PE N L
Speed
N M L
controller
PE
PE
Wiring diagram
(unit with an S12 controller)
857 6 5 4 3 2 1
Х1
Power
cord
plug
Q
F
N
N
L
L
4 3 2 1 PE N L
Speed
L1 L N
controller
PE
PE
Power
cord
plug
QF
QF
N
N
L
L
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KoMFort Erv d
Wiring diagram
(unit with an S20 controller)
857 6 5 4 3 2 1
Х1
4 3 2 1 PE N L
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N N
PE
PE
DISCONNECT THE UNIT FROM POWER SUPPLY BEFORE
ANY MAINTENANCE OPERATIONS!
The unit must undergo technical maintenance 3 to 4 times a year.
They include general cleaning of the unit and the following operations:
1. Filter maintenance (3-4 times per year).
Dirty filters increase air resistance in the system and reduce supply air volume.
Replace the filters not less than 3-4 times per year.
To replace the filters, remove the inspection hatch located on the service panel and
remove the dirty filters, then install the new filters and the inspection hatch in the
reverse order. 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 high heat exchange efficiency, periodical dry
cleaning is recommended. Use a vacuum cleaner with a narrow nozzle.
To replace the heat exchanger, remove the inspection hatch located on the service
panel and remove the contaminated heat exchanger
Then install a new heat exchanger and an inspection hatch in the reverse order.
For a new heat exchanger contact the Seller.
QF
QF
LN
LN
TECHNICAL MAINTENANCE
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 fans with a soft brush or cloth. 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.
5. Control unit maintenance (if necessary).
The control unit is positioned inside the unit casing.
For accessing the control unit remove the fixing screws on the service panel and remove it.
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TROUBLESHOOTING
Problem Possible reasons Troubleshooting
KoMFort Erv d
The fan(s) do(es) not get
started.
Low air flow.
Noise, vibration.
No power supply.
Filters, fans or the heat exchanger
are soiled.
The ventilation system is soiled or
damaged.
The fan impeller is soiled. Clean the impellers.
The fan or casing screw connection
is loose.
Make sure the power supply line is connected correctly,
otherwise troubleshoot a connection error.
Clean or replace the filters. Clean the fans and the heat
exchanger.
Clean the ventilation system components.
Replace the damaged components.
Tighten the screw connection of the fan or the casing
against stop.
STORAGE AND TRANSPORTATION REGULATIONS
• Store the unit in the manufacturer’s original packaging box in a dry closed ventilated premise with temperature range
from +5 °C to + 40 °C 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 Council Directive 2014/30/EU, Low Voltage Directive 2014/35/
EU and CE-marking 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
TROUBLEFREE 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 Energy recovery air handling unit
Model KOMFORT ERV D___________
Serial Number
Manufacture Date
Quality Inspector’s
Stamp
SELLER INFORMATION
Seller
Address
Phone Number
E-mail
KoMFort Erv d
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 KOMFORT ERV D___________ unit is installed pursuant to the requirements stated in the present
user's manual.
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
Seller’s Stamp
Installation Stamp
Unit Type Energy recovery air handling unit
Model KOMFORT ERV D___________
Serial Number
Manufacture Date
Purchase Date
Warranty Period
Seller
14
Seller’s Stamp
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B147EN-02
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