BLAUBERG Ventilatoren KOMFORT Roto EC S280 User manual

HEAT RECOVERY AIR HANDLING UNIT
USER’S MANUAL
EN
KOMFORT Roto EC S280
KOMFORT Roto EC SE280

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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.
CONTENTS
UNIT INSTALLATION AND OPERATION SAFETY PRECAUTIONS
• Disconnect the unit from power mains prior
to any installation operations. • Unpack the unit with care.
• The unit must be grounded!
• While installing the unit, follow the safety
regulations specific to the use of electric
tools.
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 Roto EC S(E)280 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..................................................................................................................................................................... 2
Purpose................................................................................................................................................................................................ 4
Delivery set........................................................................................................................................................................................ 4
Designation key.............................................................................................................................................................................. 4
Technical data.................................................................................................................................................................................. 5
Design and operating principle ........................................................................................................................................... 7
Installation and set-up................................................................................................................................................................ 8
Connection to power mains .................................................................................................................................................. 11
Technical maintenance.............................................................................................................................................................. 14
Storage and transportation regulations.......................................................................................................................... 16
Manufacturer’s warranty........................................................................................................................................................... 17
Certificate of acceptance.......................................................................................................................................................... 19
Seller information.......................................................................................................................................................................... 19
Installation certificate.................................................................................................................................................................. 19
Warranty card................................................................................................................................................................................... 19

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• Do not change the power cable length at
your own discretion. Do not bend the power
cable. Avoid damaging the power cable. Do
not put any foreign objects on the power
cable.
• Do not lay the power cable of the unit in
close proximity to heating equipment.
• Do not use damaged equipment or cables
when connecting the unit to power mains.
• 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 wash the unit with water. Protect the
electric parts of the unit against ingress of
water.
• Do not allow children to operate the unit. • Disconnect the unit from power mains prior
to any technical maintenance.
• Do not store any explosive or highly
flammable substances in close proximity to
the unit.
• When the unit generates unusual sounds,
odour, or emits smoke, disconnect it from
power supply and contact the Seller.
• Do not open the unit during operation. • Do not direct the air flow produced by the
unit towards open flame or ignition sources.
• Do not block the air duct when the unit is
switched on.
• 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. • Use the unit only for its intended purpose.
THE PRODUCT MUST BE DISPOSED SEPARATELY AT THE END OF ITS SERVICE LIFE.
DO NOT DISPOSE THE UNIT AS UNSORTED DOMESTIC WASTE.

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DELIVERY SET
DESIGNATION KEY
PURPOSE
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 designed to ensure continuous mechanical air exchange in houses, offices, hotels, cafés, 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 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).
Relative humidity of transported air must not exceed 80 % at an ambient temperature of +20 °C.
Name Number
Air handling unit 1 pc.
User’s manual 1 pc.
Control panel* 1 pc.
Installation kit 1 pc.
Packing box 1 pc.
*Control panel is not included in delivery set of units equipped with A21 controller.
KOMFORT Roto EC S E 280 S17
Control
S17 — th-Tune control panel with an LCD display
S18 — pGD1 control panel with an LCD display
S21 — wireless control system
Rated air ow [m3/h]
Electric heater
_ — without an electric heater
E — with an electric heater
Spigot orientation
S — vertical
Motor type
EC — electronically commutated
Series of units
Heat recovery air handling unit with a rotary heat exchanger

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TECHNICAL DATA
TECHNICAL DATA
Parameter KOMFORT Roto EC S280 KOMFORT Roto EC SE280
Unit voltage [V/50 (60) Hz] 1~ 230
Maximum unit power (without a heater) [W] 195
Maximum heater power [W] 650
Maximum unit power (with a heater) [W] 195 845
Maximum unit current (without a heater) [A] 1.9
Maximum heater current [A] - 2.8
Maximum unit current (with a heater) [A] 1.9 4.7
Maximum air flow [m3/h] 300
RPM, min-12050
Sound pressure level at 3 m distance [dBA] 26
Maximum transported air temperature [°C] from -25 up to +40
Casing material painted steel
Insulation 40 mm mineral wool
Filter: extract G4
supply F7
Connected air duct diameter [mm] 125
Weight [kg] 63 64
Heat recovery efficiency [%] from 81 up to 90
Heat exchanger type rotary
Heat exchanger material aluminium
SEC class А
The unit is designed for indoor application with the ambient temperature ranging from +1 °C (+33.8 °F) up to +40 °C (+104 °F) 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.

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OVERALL DIMENSIONS OF THE UNIT mm
H
H1 H2
H3
B1
B2B3
L
L1 L2
L5
L3 L4
B
Ø D
Model D L L1 L2 L3 L4 L5 BB1 B2 B3 HH1 H2 H3
KOMFORT Roto EC S(E)280 125 598 107 243 141 107 256 520 482 230 136 754 630 97 73
* The unit is equipped with height adjustable feet to compensate for uneven flooring.

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DESIGN AND OPERATING PRINCIPLE
The unit has the following operating principle: Warm stale extract air from the room flows to the unit, where it is filtered. Then the air is
moved through the rotary heat exchanger and is exhausted outside with the extract fan.
Clean cold air from outside is moved to the intake filter. Then filtered air flows through the rotary heat exchanger and the electric heater
(for the KOMFORT Roto EC S(E)280 units) where it is warmed up to the set temperature and is moved to the room with the supply fan.
Heat energy of warm extract air is transferred to clean intake fresh air from outside and warms it up.
Heat recovery minimizes heat losses and space heating expenses in cold seasons and cooling expanses in warm seasons.
The unit is equipped with an additional extract spigot for connecting a kitchen hood.
UNIT OPERATION LOGIC
Supply air
Intake air Exhaust air
Extract air
Additional spigot
for optional remote
connection of
a kitchen hood
UNIT DESIGN
F7 supply filter
Extract filter G4
Humidity sensor (option)
Supply fan Extract fan
Control unit
Electric heater control unit
Rotary heat exchanger
Rotary heat exchanger drive
Electric heater

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READ THE USER'S MANUAL BEFORE INSTALLING THE UNIT.
THE UNIT MUST BE MOUNTED BY A QUALIFIED EXPERT ONLY, PROPERLY TRAINED
AND HAVING THE REQUIRED TOOLS AND MATERIALS.
INSTALLATION AND SETUP
While installing the unit, provide enough access for maintenance or repair work.
When selecting an installation location of the unit, provide free opening of the service panel.
To get the best performance of the unit and to minimize turbulence-induced air pressure losses, connect the straight air duct section to
the spigots on both sides of the unit while installing.
Minimum straight air duct length:
• equal to 1 air duct diameter on the intake side
• equal to 3 air duct diameters on the 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 fans, the spigots may be covered with a protecting grille or other protecting device with mesh width not more than 12.5 mm.
While installing the unit, ensure convenient access for subsequent maintenance and repair. The unit must be mounted on a plane wall.
Installing the unit to an uneven surface could lead to the unit’s casing distortion and operation disturbance.
The unit is designed for mounting on a horizontal surface as well as for wall mounting with a fixing bracket that is fastened with screws
and dowels (not included in the delivery set).
UNIT FLOOR MOUNTING
When selecting the installation site provide minimum allowed distances to the unit.
min 250 mm
min 500 mm

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Attach the wall mounting bracket to the wall using dowels with screws (not included in the delivery set). Attach the wall mounting
bracket to the wall considering the wall material and the unit weight.
Install the unit on the mounting bracket. Suspend it carefully. Make sure the unit is fastened securely prior to operation.
UNIT FLOOR MOUNTING
Place the unit on a flat, stable surface that has sufficient load capacity matching the unit weight and meets safety requirements. Ensure
a stable position of the unit by screwing and unscrewing its feet.

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HUMIDITY SENSOR MOUNTING
The FS2 humidity sensor is not included in the delivery set and can be ordered separately.
To install the humidity sensor, take off the front panel and remove the extract filter out of the unit.
Install the humidity sensor into the mounting bracket on the inner side of the unit.
Connect the cable with a connector (located inside the unit) to the sensor.
SERVICE SIDE CHANGE
1. Make sure of the correct unit service side selection. Unit mounting position should enable free excess to the service panel for
maintenance and service operations.
Supply air
Intake air Exhaust air
Extract air
Supply air
Intake air
Exhaust air
Extract air
2. Unscrew the 6 screws and remove the mounting bracket. Attach the mounting bracket to the opposite side of the unit. Unscrew the
two screws on the side stops (located at the bottom of the unit) and attach them to the opposite side.

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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.
ANY TAMPERING WITH THE INTERNAL CONNECTIONS IS PROHIBITED
AND WILL VOID THE WARRANTY.
Access to the terminal block
• The unit is rated for connection to 1~230 V/50(60) 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.

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EXTERNAL CONTROL UNITS WIRING DIAGRAM OF THE KOMFORT ROTO EC SE280 S17/S18 UNITS
2 1
L
SM1*
N
2 1
L
SM2*
N
0-10 V indoor humidity sensor connection (it is also possible to connect a VOC or a CO2sensor)
Normally opened contact from relay sensor or switch Condenser unit activation signal (no-contact, 16 A)
Power input 230 VAC
2 1
PK1*
1
gnd
2
R+
3
R-
4
GND~
5
~24V
6
0-10V
7
GND
8
~24V
9
NO
10
NO
11
NO
12
NO
13
2
14
1
15
2
16
1
17
NO
18
NO
19
N
20
L
21
N
22
L1
23
GND Green
Grey Black Y/G
Blue
Brown
Yellow Brown Grey White
P1** th-Tune
Rx+/Tx+
Rx-/Tx-
GND~
~24V
P2* Kitchen hood
TS1
1 2 1 2
L1
PE
X1
– Electric shock hazard!
Design Name Model Wire***
SM1* Exhaust or supply air damper electric actuator LF230 2x0.75 mm2
SM2* Exhaust or supply air damper electric actuator LF230 2x0.75 mm2
PK1* Contact from fire alarm panel NC 2x0.75 mm2
P1** Remote control panel th-Tune 5x0.25 mm2
P2* Kitchen hood
*The appliances are not supplied with the unit, are available on the separate order.
** The unit can be equipped with a th-Tune control panel.
*** Wire cross-section at a cable length of maximum 100 m.
Maximum cable length from controller to control panel
Cable type Distance between the controller and the
control panel
Phone cable up to 50 m
AWG24 shielded cable up to 200 m

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EXTERNAL CONTROL UNITS WIRING DIAGRAM OF THE KOMFORT ROTO EC SE280 S21 UNITS
1 2
1
2
19 20 21 22
L N NO CN C C
NONO CC
AB
0-10V +24V
+24V
PE L NC NC GND GND
L N 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
GND
GND 0-10V A B +24V +24V
12
PK1 *
KH1 .1*
KH1 .2*
12 12
12 12
Boost* CO2*P1* SM1* SM2*
HL1
12
CCU*
X1
12 12
**U
**U
PE
Power input
230 V/50 Hz
Brown
Yellow
Y./G.
Blue Brown
Green
Grey Black
White
– Electric shock hazard!
Designation Name Contact type Cable type Notice
SМ1* Supply air damper actuator NO
2 x 0.75 mm2
3 A, 30DC/~250 AC
SМ2* Exhaust air damper actuator NO 3 A, 30DC/~250 AC
РК1* Contact from fire alarm panel NC Remove the jumper
CCU* Cooler control NO 3 A, 30DC/~250 AC
P1* External control panel 4 x 0.25 mm2
Boost* Contacts ON/OFF Boost NO 2 x 0.25 mm2
CO2* Contacts ON/OFF CO23 x 0.75 mm2
КН1* Kitchen hood 5 x 0.75 mm2
* Is not included in the delivery set.
** The supply voltage U of external dampers SM1, SM2 is selected depending on the type of dampers.
Output parameters: terminals 15-20 - 3A, 30VDC / ~ 250VAC (“dry contact”).
The maximum cable length from external devices to the terminal block should not exceed 100 meters. The recommended cable cross-
section is shown in the table.

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TECHNICAL MAINTENANCE
DISCONNECT THE UNIT FROM POWER SUPPLY BEFORE
ANY MAINTENANCE OPERATIONS!
Maintenance operations of the unit are required 3-4 times per year. They include general cleaning of the unit and the following operations:
1. Filter maintenance.
Dirty filters increase air resistance in the system and reduce supply air volume. The filters require cleaning not less than 3-4 times per year.
When 3 000 operating hours have elapsed, the unit controller generates the filter replacement or cleaning alert. Clean or replace the
filters and reset the hour meter.
Vacuum cleaning is allowed. After two consecutive cleanings filters must be replaced.
For new filters contact the Seller.
Sequence of filter removal:
1. Disconnect the unit from power mains.
2. Remove the filter covers.
3. Remove the filters.
2. Heat exchanger maintenance (once per year).
Some dust may accumulate on the heat exchanger even in case of regular maintenance of the filters. To maintain the high heat recovery
efficiency, regular cleaning of the heat exchanger is required. To clean the heat exchanger, remove it from the unit and clean the heat
exchanger by using compressed air or a vacuum cleaner. After cleaning re-install the heat exchanger into the unit. Sequence of heat
exchanger removal:
1. Disconnect the unit from power mains.
2. Remove the filter covers.
3. Remove the side cover.
4. Disconnect the rotary heat exchanger and then unlatch and pull it to remove.

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3. Fan maintenance (once per 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 cloth or a brush.
Do not use water, aggressive solvents, or sharp objects as they may damage the impeller.
4. Supply air flow control (twice per year).
The supply duct grille may get clogged with leaves and other objects reducing the unit performance and supply air delivery. Check the
supply grille twice per year and clean it as required.
5. Ductwork system maintenance (once in 5 years).
Even regular fulfilling of all the maintenance operations prescribed above may not completely prevent dirt accumulation in the air ducts,
which leads to air pollution and reduces the unit capacity.
Duct maintenance means regular cleaning or replacement.
PROBLEM POSSIBLE REASONS TROUBLESHOOTING
The fan(s) does not start
when the unit is on.
No power supply. Make sure the power supply line is connected correctly,
otherwise troubleshoot the connection error.
The motor is jammed, the impeller blades are soiled. Turn the unit off. Troubleshoot the motor jam and the
impeller clogging. Clean the blades. Restart the unit.
Alarm in the system. System alarms are listed below.
Identify the system failure by entering the active alarms
menu and eliminate the alarm.
If the system alarm cannot be eliminated by the user, contact
the Seller.
Automatic circuit breaker
tripping when the unit is
switched on.
High current consumption due to short circuit in power
line. Turn the unit off. Contact the Seller.
Low air flow.
Low set fan speed. Set higher speed.
The filters and the fans are clogged, the heat exchanger
is clogged.
Clean or replace the filters, clean the fans, and the heat
exchanger.
Ventilation system elements (air ducts, diffusers, louver
shutters, grilles) are clogged, damaged, or closed.
Clean or replace the ventilation system elements, such as air
ducts, diffusers, louver shutters, grilles.
Cold supply air. The extract filter is soiled. Clean or replace the extract filter.
The unit operates in Cooling mode. Check the unit operation settings.
Noise, vibration.
The impeller(s) is soiled. Clean the impeller(s).
The fan or casing screw connection is loose. Tighten the screw connection of the fans or the casing
against stop.
No anti-vibration connectors on air duct pipe flanges. Install anti-vibration connectors.
Room terminal is faulty. No connection with a control panel. Check the connection of the controller with the control
panel. Contact the Seller.

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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 ˚С to +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 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
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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Unit Type Heat recovery air handling unit
Seller’s Stamp
Model KOMFORT Roto EC S__280 S___
Serial Number
Manufacture Date
Purchase Date
Warranty Period
Seller
Unit Type Heat recovery air handling unit
Model KOMFORT Roto EC S__280 S___
Serial Number
Manufacture Date
Quality Inspector’s
Stamp
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
The KOMFORT Roto EC S__280 S___ 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:
CERTIFICATE OF ACCEPTANCE
SELLER INFORMATION
INSTALLATION CERTIFICATE
WARRANTY CARD

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