BLAUBERG Ventilatoren KOMFORT EC S200 User manual

Air hAndling unit
USER'S MANUAL
EN
KOMFORT EC S200
KOMFORT EC S200-E
KOMFORT EC SB200
KOMFORT EC SB200-E
KOMFORT EC S250
KOMFORT EC S250-E
KOMFORT EC SB250
KOMFORT EC SB250-E
Air handling unit

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2
Safety requirements..................................................................................................................................................................... 3
Purpose................................................................................................................................................................................................ 5
Delivery set........................................................................................................................................................................................ 5
Designation key.............................................................................................................................................................................. 5
Technical data.................................................................................................................................................................................. 6
Design and operating principle ........................................................................................................................................... 7
Mounting and set-up.................................................................................................................................................................. 10
Connection to power mains .................................................................................................................................................. 13
Technical maintenance.............................................................................................................................................................. 18
Troubleshooting............................................................................................................................................................................. 19
Storage and transportation regulations.......................................................................................................................... 20
Manufacturer’s warranty........................................................................................................................................................... 21
Certificate of acceptance ........................................................................................................................................................ 23
Seller information.......................................................................................................................................................................... 23
Installation certificate.................................................................................................................................................................. 23
Warranty card ................................................................................................................................................................................. 23
This user’s manual is a main operating document intended for technical, maintenance, and operating staff.
The manual contains information about purpose, technical details, operating principle, design, and installation of the
KOMFORT EC S(B)200/250(-E) unit and all its modifications.
Technical and maintenance staff must have theoretical and practical training in the field of ventilation systems and should be able to
work in accordance with workplace safety rules as well as construction norms and standards applicable in the territory of the country.
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.
CONTENTS

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KOMFOrt EC S(B)200/250(-E)
3
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.
• 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.
• 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.

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• Do not allow children to
operate the unit.
• The unit is allowed to be used
by children aged from 8 years
oldand above and persons
with reduced physical, sensory,
or mental capabilities or no
experience and knowledge
provided that they have been
given supervision or instruction
regarding safe use of the
unit and understand the risks
involved.
• 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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KOMFOrt EC S(B)200/250(-E)
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DELIVERY SET
Name Number
Air handling unit 1 pc.
User’s manual 1 pc.
Control panel user’s manual 1 pc.
Control panel 1 pc.
Drain pipe 1 pc.
Mounting bracket 1 pc.
F7 label 1 pc.
Packing box 1 pc.
DESIGNATION KEY
KOMFORT EC S B 200 ES11
Steuerung
S11
S14
S19
S21
Heat exchanger type
_ – heat recovery air handling unit
E – energy recovery air handling unit
Rated air ow [m3/h]
Additional components
_ — no
B – bypass
Spigot orientation
S – vertical
Motor type
EC – electronically commutated
Series of units
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 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).
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.

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TECHNICAL DATA
TECHNICAL DATA
Parameter KOMFORT
EC S200
KOMFORT
EC S200-E
KOMFORT
EC SB200
KOMFORT EC
SB200-E
KOMFORT
EC S250
KOMFORT
EC S250-E
KOMFORT
EC SB250
KOMFORT
EC SB250-E
Unit voltage [V/50 (60) Hz] 1~ 230
Maximum unit power [W] 112 115
Unit current [A] 0.9 0.9
Maximum air flow [m3/h] 250 290
Sound pressure level at a distance of 3 m [dBA] 24 25
RPM [min-1] 2050
Transported air temperature [°С] from -25 up to +40 from -25 up to +40 from -25 up to +40 from -25 up to +40
Casing material polymer coated steel polymer coated steel polymer coated steel polymer coated steel
Insulation 25 mm, mineral wool 25 mm, mineral wool 30 mm, mineral wool 30 mm, mineral wool
Extract filter G3 G3 G4 G4
Supply filter G3 G3 G4, F7 G4, F7
Connected air duct diameter [mm] Ø125 Ø125 Ø160 Ø160
Weight [kg] 45 45 51 51
Heat recovery efficiency [%] 83-98 74-94 83-98 74-94 85-94 77-90 85-94 77-90
Heat exchanger type counter-flow counter-flow counter-flow counter-flow
Heat exchanger material polystyrene enthalpy polystyrene enthalpy polystyrene enthalpy polystyrene enthalpy
SEC class A+ AA+ AA+ A+ A+ A+
Overall and connecting dimensions [mm]
KOMFORT EC S(B)200(-E)
Ø 18
564
290
326
773
842
9797
85115
85 115
279
279 Ø124
KOMFORT EC S(B)250(-E)
Ø 18
567
450
489
790
853
204123
110
110 90
254
344
Ø160
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.

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DESIGN AND OPERATING PRINCIPLE
KOMFORT EC S(B)200(-E)
2
3
1
6
4
9
10
11
7
8
12
5
1 – bypass damper (KOMFORT EC SB200/250(-E))
2 – supply fan
3 – FS1 or FS2 humidity sensor (installed at the
request of the customer)
4 – control unit
5 – extract fan
6 – supply filter
7 – extract filter
8 – freeze protection sensor
9 – counter-flow heat exchanger
10 – drain pan
11 – drain pipe
12 — detachable service plates for filter
maintenance operations
KOMFORT EC S(B)250(-E)
3
4
5
2
7
6
1
11
12
13
8
9
10
14
15
1 - terminal box
2 – bypass damper (KOMFORT EC SB200/250(-E))
3 – supply fan
4 - FS1 or FS2 humidity sensor (installed at the
request of the customer)
5 – extract fan
6 – internal control unit
7 – supply filter
8 – extract filter
9 – supply filter
10 – counter-flow heat exchanger
11 – freeze protection sensor
12 – drain pan
13 – drain pipe
14 – SETUP MODE button (for the units with S21
automation)
15 – detachable service plates for filter
maintenance operations
The unit casing is made of rigidly fixed panels. The panels are made of painted steel sheet and galvanized steel sheet with a heat- and
sound-insulating layer of mineral wool between them.
The front panel of the unit has removable plates to enable filter replacement. Location of the service side may be changed.
The difference between the supply and extract air flow temperatures in the KOMFORT EC S(B)200/250 units leads to condensate
generation. Condensate is collected in the drain pan and is removed outside through the drain pipe.
The KOMFORT EC S(B)200/250-E units are equipped with an enthalpy heat exchanger and do not require condensate drainage.
Accessories for the unit are available on a separate order.
• Humidity sensor. The unit with an installed humidity sensor maintains a set indoor humidity level. As the extract air humidity rises
above the set point, the system automatically switches to the maximum speed. As the humidity drops down below the set point,
the unit returns to the previous mode.
• CO2sensor. Measures the level of concentration of carbon dioxide in the room and generates a signal that controls the
performance of the fan. Air capacity control based on CO2concentration is an efficient energy saving solution.
• VOC sensor. Qualitative assessment of air saturation with contaminants (cigarette smoke, exhaled air, solvent and detergent
vapours). The sensor sensitivity can be adjusted with regards to the expected maximum level of air pollution. Enables on-demand
ventilation which results in considerable energy savings as air is exchanged only upon reaching the preset level of pollution.
• EVH duct heater for intake air preheating. The heater maintains the air temperature in the intake duct at a level that prevents
the heat exchanger from freezing. Heater installation and connection to the unit are described in the heater user's manual.
• ENH duct reheater. The heater maintains the room temperature set by the user. Heater installation and connection to the unit are
described in the heater user's manual.

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Compatibility table of optional equipment and unit models
FS1 internal
humidity sensor
FS2 internal
humidity sensor
Room CD-1
sensor
Room CD-2
sensor
Room humidity
sensor
Room VOC
sensor (0-10 V)
Room CO2
sensor (0-10 V)
Room humidity
sensor (0-10 V)
EVH heater
ENH heater
KOMFORT EC S200 S14
—++++
— — —
— —
KOMFORT EC SB200 S14
KOMFORT EC S200-E S14
KOMFORT EC SB200-E S14
KOMFORT EC S250 S19 +—+++ + +
KOMFORT EC S250 S14 — + — —
KOMFORT EC S250 S11 +— — — — + —
KOMFORT EC SB250 S19 —
+++
+ +
KOMFORT EC SB250 S21 —++ + + + +
KOMFORT EC SB250 S14 —
— — —
— —
KOMFORT EC SB250 S11 +— — — — + —
KOMFORT EC S250-E S19 —+++ + +
KOMFORT EC S250-E S14 — + — —
KOMFORT EC S250-E S11 +— — — — + —
KOMFORT EC SB250-E S19 —+++
+ +
KOMFORT EC SB250-E S21 —++ + + + +
KOMFORT EC SB250-E S14 — + + — — —— — —
KOMFORT EC SB250-E S11 + — — — — + —
UNIT OPERATION MODES
Heat Recovery mode
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 exhaust fan. Air from outside flows into the unit, where it is cleaned in the supply filter. Then the air flows through the
heat exchanger and is directed to the room with the supply fan. Intake 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.
Freeze protection (danger of freezing appears when the exhaust air temperature downstream of the heat exchanger is lower than
+5 °C and intake air temperature upstream of the heat exchanger is lower than -3 °C for the units with preheating, and when exhaust
temperature downstream of the heat exchanger is lower than +3 °C for the units without preheating). To protect the heat exchanger from
freezing in the cold season, the unit has a Frost Protection mode based on the temperature sensor readings. The temperature sensor is
installed in the exhaust air duct downstream of the heat exchanger.
The Frost Protection mode is activated at an exhaust air temperature of +3 ˚С. After temperature increase the unit returns to the previous
operation mode. In units with an S11 or S19 control panel, the frost protection mode must be activated, see the User’s manual of the
control panel. In case of freezing danger, the supply fan is turned off in the units with an S14 control panel. After temperature increase
the unit returns to the previous operation mode. The KOMFORT EC S(B)250(-E) S21 units have three frost protection modes: gradual
reduction of the supply fan speed; with the bypass; with the electric preheater (if the unit is equipped with a duct preheater). Mode
selection and settings are described in the S21 control system user’s manual.
Summer Cooling mode (ventilation)
The extract air flows through the bypass duct and does not come in contact with the heat exchanger. The air duct is opened with the
bypass damper. The intake air temperature remains constant.

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KOMFOrt EC S(B)200/250(-E)
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AIR FLOW DIRECTION
The air flow direction depending on the operation mode of the KOMFORT EC S(B)200(-E) unit is shown below.
Heat Recovery mode Freeze protection Summer Cooling mode
Supply fan is off Bypass duct is opened Bypass duct is opened
KOMFORT EC S(B)200(-E)
KOMFORT EC S(B)250(-E)
KOMFORT EC S(B)200(-E)
KOMFORT EC S(B)250(-E)
KOMFORT EC S(B)200(-E)
KOMFORT EC S(B)250(-E)
KOMFORT EC S(B)200(-E)
KOMFORT EC S(B)250(-E)
INTAKE AIR SUPPLY AIR EXTRACT AIR EXHAUST AIR
INTAKE AIR SUPPLY AIR EXTRACT AIR EXHAUST AIR
INTAKE AIR SUPPLY AIR EXTRACT AIR EXHAUST AIR
INTAKE AIR SUPPLY AIR EXTRACT AIR EXHAUST AIR

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HUMIDITY SENSOR MOUNTING IN THE EXTRACT AIR DUCT
CAUTION!
The humidity sensor must be installed in the air duct prior to the unit mounting.
FS1 humidity sensor mounting sequence:
• Remove the screws that retain the panel on side of the extract spigot and remove it.
• Place the humidity sensor in the mount.
• Connect the humidity sensor connector to the connector with a cable from the control unit. The connector is mounted by the
manufacturer.
FS2 humidity sensor mounting sequence:
• Remove the screws that retain the panel on side of the extract spigot and remove it.
• Place the humidity sensor in the mount.
• Connect the humidity sensor connector to the connector with a cable from the control unit. The connector is mounted by the
manufacturer.
Extract
air duct
MOUNTING AND SETUP
READ THE USER'S MANUAL BEFORE INSTALLING THE UNIT.

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SERVICE SIDE CHANGE
• Unscrew the front panel on the service side and the back panel.
• Remove the panels and change their positions. Attach the panels with screws to the casing.
The delivery set includes a label indicating the filter type and the air flow direction. Stick it on a removable plate (only for the
KOMFORT EC S(B)250(-E) units).
F7
F7
G4
G4
G4
G4
Before service side change After service side change
Note: service side change is shown by the example of the KOMFORT EC S(B)250(-E) unit.

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UNIT INSTALLATION
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 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.
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.
UNIT WALL MOUNTING
Fasteners for wall 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 installation
should be selected by a qualified technician. Secure the wall bracket
at the desired level. Hang the unit on the bracket.
UNIT FLOOR MOUNTING
Install the unit on the pre-mounted floor supports, minimum
150 mm height, to ensure sufficient access for the drain pipe
connection to the U-trap and for condensate drain system
installation.
min 150 mm
Note: mounting is shown by the example of the KOMFORT EC S(B)200(-E) unit.
CONDENSATE DRAINAGE
Condensate drainage is required for the KOMFORT EC S(B)200/250 units.
The hole for the drain pipe is at the bottom of the unit. Remove the plug from the hole, open the service panel and install the drain pipe
from the delivery set into the hole, then connect the drain pipe to the sewage system using the SFK 20x32-32 U-trap kit (available upon
separate order). The drain pipe must have a minimum slope of 3˚.
min 3°
DRAIN HOSE
U-TRAP
SEWAGE SYSTEM
DRAIN PIPE
Note: installation of the drain pipe is shown on the example of the KOMFORT EC S(B)200 unit.

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Access to the control unit
• Unscrew the front panel on the service side and
remove it.
• Remove the heat exchanger.
• Remove the screws that retain the electric
mounting plate and push it downwards.
For KOMFORT EC S(B)200(-E) models both terminal
blocks X1 and X2 are located on the electric mounting
plate of the internal control unit.
For KOMFORT EC S(B)250(-E) models the terminal block
X1 is located on the electric mounting plate.
Access to the terminal box (only for the
KOMFORT EC S(B)250(-E) units)
• The X2 terminal block is located in the external
terminal box on the unit casing.
• To access the X2 terminal block, remove the screws
on the terminal box and remove the lid.
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.
• The unit is rated for connection to 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 WIRING DIAGRAM FOR THE KOMFORT EC SB200E S14 UNIT
2 3 4 10987654321 11
L
1
PK re alarm panel
(remove the jumper while
connecting the contact)
230 V/50-60 Hz
P1 control
panel
- Tx Rx +
Gnd Tx Rx +U
3
2
1
Gnd
+U
0-10V
Gnd+U 0-10V noNnc c c
X1 X2
12
SM-L
13
SM-N
FS2
humidity sensor
White
Brown
Green
Yellow
XP
QF
Electric actuators
of the external air dampers
SM1
supply
L1 N
SM2
exhaust
L1 N
External device
NO contact
(CO
2
sensor)
— ELECTRIC SHOCK HAZARD!
Designation Name Cable type Maximum cable
length Note
S1* Supply air damper actuator 2x0.75 mm220 m LF 230
S2* Extract air damper actuator 2x0.75 mm220 m LF 230
* Contact from fire alarm panel 2x0.75 mm220 m no
1 Control panel 4x0.25 mm210 m
*Is not included in the delivery set.

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KOMFOrt EC S(B)200/250(-E)
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EXTERNAL WIRING DIAGRAM FOR THE KOMFORT EC SB250E S14 UNIT
2 1 3 2 1
+U
0-10V
GND
1 2 3 4 5 6 7 8 9 10 11 12 13 6 7 8
L N
PK2
PK2
+U
SM-L SM-N
GND GND
GND
C +U +U 0-10VNO
P1 HV1SM1* SM2*
TX
TX
RX
RX
Х2 Х1
CO2*
PK1*
2 1 2 1
2 1
Power input ~230 VAC
Remove
the jumper
White
White
Brown
Brown
Green
Green
Yellow
FS1*
— ELECTRIC SHOCK HAZARD!
Designation Name Model Wire***
S1* Supply air damper actuator 2 x 0.75 mm2
S2 * Extract air damper actuator 2 x 0.75 mm2
1* Contact from fire alarm panel NС 2 x 0.75 mm2
CO2* CO2sensor NO 2 x 0.75 mm2
FS1* Humidity sensor 3 x 0.75 mm2
P1 External control panel 4 x 0.25 mm2
*Is not included in the delivery set.
**Maximum connecting cable length is 20 m!.

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EXTERNAL WIRING DIAGRAM FOR THE KOMFORT EC SB250E S19 UNIT
141516
AKH
13
B
12
Gnd
11
+12 V
10
no
9
c
8
no
7 6 5
c
4
L L
3
L
2 1
*SM1
L N
*SM2
L
2
211 21
N
*Compressor and
condensing unit
(NO-contact)
BA
+12V
Gnd
Р1
*PK1
Power input 230 VAC
Х1
N NN L1 L1
no c
*KH
Brown Yellow Green White
{
Designation Name Model Wire
*CCU DX cooler NO 2x0.75 mm2
*S1 Supply air damper actuator LF 230 2x0.75 mm2
*S2 Extract air damper actuator LF 230 2x0.75 mm2
*1 Contact from fire alarm panel NO 2x0.75 mm2
* Contact from kitchen hood NO 2x0.75 mm2
1 External control panel
*The unit is not included in the delivery set.
— ELECTRIC SHOCK HAZARD!

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KOMFOrt EC S(B)200/250(-E)
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EXTERNAL WIRING DIAGRAM FOR THE KOMFORT EC SB250E S21 UNIT
12 12
Boost* CO2*
GND
GND
GND
GND
0-10V
0-10V
+24V
+24V
А В +24V
12
PK1 *
12 12
P1*
12
CCU*
X1
12
SM1*
12
SM2*
U**U**
L N
L N
PE NO A BC C C NO C NO C NO NC +24V
5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21
Brown
Yellow
Green
White
Power input 230 VAC
Designation Name Model Wire*** Note
S1* Supply air damper actuator NO 2 x 0.75 mm23 A, 30VDC/~250 AC
S2 * Extract air damper actuator NO 2 x 0.75 mm23 A, 30VDC/~250 AC
1* Contact from fire alarm panel NC 2 x 0.75 mm2
CCU* CCU control NO 2 x 0.75 mm23 A, 30VDC/~250 AC
1* External control panel 4 x 0.25 mm2
Boost* Contacts ON/OFF Boost NO 2 x 0.75 mm2
CO2* Outdoor CO2sensor 3 x 0.75 mm2
*Is not included in the delivery set.
** The supply voltage U of the SM1 and SM2 external dampers is selected depending on the type of dampers.
*** Maximum connecting cable length is 20 m!
Output parameters: terminals 16-21 – 3 A, 30VDC / ~ 250VAC ("dry contact").
— ELECTRIC SHOCK HAZARD!

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TECHNICAL MAINTENANCE
The unit must undergo technical maintenance 3 to 4 times a year. Maintenance includes general cleaning of the unit and the following
operations:
G4
F7
1. Filter maintenance (3-4 times per year).
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.
Cleaning of F7 lters
Remove the dirty filters from the unit. Clean the filters
with a vacuum cleaner and install them back to the unit.
After two cleanings filters must be replaced. For new filters
contact the Seller.
Cleaning of G4 lters
Remove the dirty filters from the unit. Then remove the
retaining clamps to pull the filters from the frames. Rinse
the filters with water and leave them dry out. After drying,
reassemble the filters in the reverse order and place them
back into the unit. Note: access to the filters is shown on
the example of the KOMFORT EC S(B)250(-E) unit.
2. Heat exchanger maintenance (once a year).
Some dust may accumulate on the heat exchanger block
even in case of regular maintenance of the filters. To
maintain the high heat recovery efficiency, regular cleaning
is required.
Wet cleaning of the heat exchanger
To clean the heat exchanger, pull it out, flush the heat
exchanger with warm detergent solution. After cleaning
install the dry heat exchanger back to the unit.
Dry cleaning of the heat exchanger
Remove the clogged heat exchanger out of the unit, clean
it with a vacuum cleaner and install the heat exchanger
back to the unit.
Note: access to the heat exchanger is shown on the
example of the KOMFORT EC S(B)250(-E) unit.
3. Fan maintenance (once a year).
Even in case of regular maintenance of the filters, some dust may accumulate inside the fans and reduce the fan performance and supply
air flow. Clean the 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 condensate drainage system (once a year).
The condensate drainage (drain line) may get clogged by dirt and dust particles contained in the exhaust air. Pour some water inside the
drain pan to check the pipe for clogging. Clean the U-trap and the drain pipe if required.
DISCONNECT THE UNIT FROM POWER SUPPLY BEFORE
ANY MAINTENANCE OPERATIONS!

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KOMFOrt EC S(B)200/250(-E)
19
5. 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.
6. Control unit maintenance (if necessary).
The control unit maintenance must be performed by an expert qualified for unassisted operations with electrical installations with the
voltage up to 1000 V after careful reading of the user's manual.
TROUBLESHOOTING
IF UNIDENTIFIED NOISES OR ODOURS SHOULD ARISE AND IN CASE OF DEFORMATION
OF ELEMENTS, VIBRATION, TERMINATION OF AIR SUPPLY/EXTRACTION OR REDUCED
SYSTEM PERFORMANCE, IMMEDIATELY DISCONNECT THE UNIT FROM POWER SUPPLY
AND CONTACT THE SELLER FOR THE VENTILATION SYSTEM DIAGNOSTICS
DIAGNOSTICS MUST BE CARRIED OUT BY QUALIFIED SPECIALISTS
POSSIBLE REASONS AND TROUBLESHOOTING
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 mode in which the fans are turned off is set. Change the mode with the help of the control panel.
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.
Noise, vibration.
The fan or casing screw connection is loose. Tighten the screw connection of the fans or the casing.
No anti-vibration connectors on air duct pipe flanges. Install anti-vibration connectors.
Water leakage
(only for the
KOMFORT EC S(B)200/250
units)
The drainage system is soiled, damaged, or installed
incorrectly.
Clean the drain line. Check the drain line slope angle. Make
sure that the U-trap is filled with water and the drain pipes
are frost protected.
If troubleshooting steps have failed, contact the Seller of the product.
In case of faults not described in the table, contact the Seller for further information.

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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
von +5 ˚С bis +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.