BLAUBERG Ventilatoren KOMFORT Roto EC D250 User manual

AIR HANDLING UNIT
KOMFORT Roto EC D/D2/DE/D2E250
KOMFORT Roto EC D/D2/DE/D2E350
KOMFORT Roto EC D/DE650
USER’S MANUAL
EN

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.
Safety requirements..................................................................................................................................................................... 2
Purpose................................................................................................................................................................................................ 4
Delivery set........................................................................................................................................................................................ 4
Designation key.............................................................................................................................................................................. 4
Technical data.................................................................................................................................................................................. 5
Design and operating principle ........................................................................................................................................... 8
Installation and set-up................................................................................................................................................................ 9
Connection to power mains .................................................................................................................................................. 12
Unit control ....................................................................................................................................................................................... 14
Technical maintenance.............................................................................................................................................................. 25
Storage and transportation regulations.......................................................................................................................... 26
Manufacturer’s warranty........................................................................................................................................................... 27
Certificate of acceptance.......................................................................................................................................................... 31
Seller information.......................................................................................................................................................................... 31
Installation certificate.................................................................................................................................................................. 31
Warranty card................................................................................................................................................................................... 31
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 D/D2/DE/D2E250/350/650 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.
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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, 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).
KOMFORT Roto EC D 2 E 250 LS17
Control
S17 – th-Tune control panel with an LCD display
S18 – pGD1 control panel with an LCD display
Modication
R – right-handed modification
L – left-handed modification
Rated air ow [m3/h]
Electric heater
_– without an electric heater
E – with an electric heater
Casing type
_ – standard, insulation thickness – 40 mm
2 – low-profile, insulation thickness – 20 mm
Mounting method
P – suspended mounting
Motor type
EC – electronically commutated
Series of units
KOMFORT Roto - heat recovery air handling unit with a
rotary heat exchanger
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Name Number
Air handling unit 1 pc.
User’s manual 1 pc.
Control panel 1 pc.
Installation kit 1 pc.
Packing box 1 pc.

TECHNICAL DATA
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A1
H1 H
B1 B
A
ØD1
Ø D
L5 L6 L7
L8
L9
L L1 L2
L3
L4
Model Dimensions [mm]
Ø D Ø D1 AA1 BB1 HH1 LL1 L2 L3 L4 L5 L6 L7 L8 L9
KOMFORT Roto EC D250 160 125 1100 1003 688 643 345 308 184 310 149 143 13 175 244 224 156 14
KOMFORT Roto EC DE250
KOMFORT Roto EC D2 250 160 125 1097 1002 666 618 245 225 162 335 118 111 9167 250 212 123 4
KOMFORT Roto EC D2E250
KOMFORT Roto EC D350 160 125 1365 1270 818 770 361 318 206 417 147 141 19 207 276 287 160 41
KOMFORT Roto EC DE350
KOMFORT Roto EC D2 350 160 125 1457 1362 847 798 245 225 209 432 155 117 9223 300 274 120 6
KOMFORT Roto EC D2E350
KOMFORT Roto EC D650 200 125 1542 1445 932 897 422 409 317 338 229 195 8172 481 231 207 12
KOMFORT Roto EC DE650
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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TECHNICAL DATA
Parameters KOMFORT Roto EC D2 250 KOMFORT Roto EC D2E250 KOMFORT Roto EC D250 KOMFORT Roto EC DE250
Unit voltage [V/50 (60) Hz] 1~ 230
Maximum unit power (without a heater) [W] 128 135
Maximum unit power (with a heater) [W] - 828 - 835
Maximum unit current (without a heater) [A] 0.9 1.0
Maximum unit current (with a heater) [A] - 4.0 - 4.1
Maximum air flow [m3/h] 300 310
RPM [min-1] 2200 2200
Sound pressure level at 3 m distance [dBA] 23 21
Maximum transported air temperature [°C] from -25 up to +40
Casing material aluzinc
Insulation 20 mm mineral wool 40 mm mineral wool
Extract filter G4
Intake filter G4, F7 (H13 optional)
Connected air duct diameter [mm] 160
Weight [kg] 53 54 55 56
Heat recovery efficiency [%] from 72 up to 87 from 71 up to 87
Heat exchanger type rotary
Heat exchanger material aluminium
SEC class A
Parameters KOMFORT Roto EC D2 350 KOMFORT Roto EC D2E350 KOMFORT Roto EC D350 KOMFORT Roto EC DE350
Unit voltage [V/50 (60) Hz] 1~ 230
Maximum unit power (without a heater) [W] 200 185
Maximum unit power (with a heater) [W] - 1600 - 1585
Maximum unit current (without a heater) [A] 1.3 1.3
Maximum unit current (with a heater) [A] - 6.9 - 6.9
Maximum air flow [m3/h] 400 430
RPM [min-1] 3200 3570
Sound pressure level at 3 m distance [dBA] 33 31
Maximum transported air temperature [°C] from -25 up to +40
Casing material aluzinc
Insulation 20 mm mineral wool 40 mm mineral wool
Extract filter G4
Intake filter G4, F7 (H13 optional)
Connected air duct diameter [mm] 160
Weight [kg] 78 79 81 82
Heat recovery efficiency [%] from 73 up to 87 from 72 up to 87
Heat exchanger type rotary
Heat exchanger material aluminium
SEC class A

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Parameters KOMFORT Roto EC D650 KOMFORT Roto EC DE650
Unit voltage [V/50 (60) Hz] 1~ 230
Maximum unit power (without a heater) [W] 367
Maximum unit power (with a heater) [W] - 3167
Maximum unit current (without a heater) [A] 2.5
Maximum unit current (with a heater) [A] - 13.7
Maximum air flow [m3/h] 710
RPM [min-1] 3600
Sound pressure level at 3 m distance [dBA] 36
Maximum transported air temperature [°C] from -25 up to +40
Casing material aluzinc
Insulation 40 mm mineral wool
Extract filter G4
Intake filter G4, F7 (H13 optional)
Connected air duct diameter [mm] 200
Weight [kg] 102 104
Heat recovery efficiency [%] from 80 up to 87
Heat exchanger type rotary
Heat exchanger material aluminium
SEC class A

DESIGN AND OPERATING PRINCIPLE
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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 exchangers and is
exhausted outside with the exhaust fan. Clean cold air from outside is moved to the intake filter. Then filtered air flows through the rotary
heat exchanger where it is warmed up to the pre-set temperature value 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 losses of electric energy and space heating expenses in cold seasons and cooling expanses in warm seasons.
An exhaust kitchen hood may be optionally connected to the unit. The kitchen hood should be equipped with an air valve. The valve
closes the exhaust duct when the kitchen hood is switched off.
Right-handed modication
(service side view)
Supply air
Extract air
From the exhaust hood
Heater
(
KOMFORT Roto EC D(2)E )
Rotary heat exchanger
Exhaust fan Extract filter
Control unit
Intake filter
Rotary heat exchanger drive
FS2 humidity sensor
(optional)"
Supply fan
Intake air
Exhaust air
Left-handed modication
(service side view)
From the exhaust hood
Intake air
Exhaust air
Supply air
Extract air
The unit is a framework construction made of rigidly fixed panels.
The panels are made of aluzinc and galvanized sheets, internally filled with a heat- and sound-insulated layer of mineral wool.
The air handling unit is equipped with quick-detachable service panels for filter replacement.
Route power and ground cables through the screwed cable glands to connect those to the terminal block located in the control unit.
The wiring diagram is shown on the control unit side panel.

INSTALLATION AND SETUP
READ THE USER’S MANUAL PRIOR TO MOUNTING THE UNIT.
THE UNIT MUST BE MOUNTED BY A QUALIFIED EXPERT ONLY, PROPERLY TRAINED AND
HAVING THE REQUIRED TOOLS AND MATERIALS.
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While mounting the unit provide enough access for maintenance or repair work.
The minimum recommended clearances between the unit and the adjoining walls are given in the figure below.
Before starting the unit make sure that the rotary heat exchanger cells are clean and free from damage.
Check the belt tension. The tension force is regulated by the spring on the motor suspension mount.
The unit may be suspended on a threaded rod that is fixed inside a dowel or may be rigidly fixed on a horizontal or vertical plane.
SUSPENDED MOUNTING OF THE UNIT
Screw
Vibration absorbing
rubber
Expansion anchor
min 400 mm
min 400 mm
Nut
Threaded rod
Washer
Vibration absorbing
rubber
Washer
Nut and lock nut
UNIT WALL MOUNTING
Screw
Vibration absorbing
rubber
Expansion anchor
min 400 mm
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

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width not more than 12.5 mm.
While installing the unit, ensure convenient access for subsequent maintenance and repair. Fasteners for ceiling mounting are not
included into 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 the service
technician.
FS2 HUMIDITY SENSOR MOUNTING
The humidity sensor is not included in the delivery set and should be ordered separately. It must be installed in the exhaust duct
upstream of the heat exchanger.
Undo the screws on the service panel and remove it. Install the humidity sensor into the mounting bracket on the exhaust duct wall.
Connect the connector with a cable of the control unit (installed by the manufacturer) to the humidity sensor connector.

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.
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EXTERNAL WIRING DIAGRAM
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
Gnd R+ R- Gnd ~24V 0-10V Gnd ~24V NO NO N
N
PE
L
L
N L1
N L1
NO NONO NO2
2
2
1
1
1
PK1*
SM1*
2 1
1 2 2 1
Gnd
P1**
th-Tune
Rx+/Tx+
Rx-/Tx-
Gnd~
24V~
{ { {
NL
2 1
SM1* KN1*
TS1
HL1
CCU*
Grey Black Yellow/green Blue Brown
Green
Yellow
Brown.
Grey
White
Power input 230 VAC
Humidity sensor 0-10 V
Control (NO)
from relay or switch
— ELECTRIC SHOCK HAZARD!
• The unit is rated for connection to 220-240 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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Designation. Name Model Wire**
SM1* Supply air damper actuator LF230 2x0.75 mm2
SM2* Extract air damper actuator LF230 2x0.75 mm2
PK1* Contact from fire alarm panel NC 2x0.75 mm2
CCU* CCU activation signal NO 2x0.75 mm2
P1** Control panel th-Tune 2x0.75 mm2
KH1* Contact from kitchen hood
*Devices are not supplied with the unit, are available on separate order.
**Wire cross-section at a cable length of maximum 100 m.
Maximum cable length from the controller to the control panel
Cable type Distance to power source
Telephone cable up to 50 m
AWG24 shielded cable up to 200 m
Access to the terminal block is shown in the figure below.

DISCONNECT THE UNIT FROM POWER SUPPLY BEFORE
ANY MAINTENANCE OPERATIONS!
TECHNICAL MAINTENANCE
Maintenance operations of the unit are required 3-4 times per year. Maintenance includes 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. Unscrew the triangular screws holding the service covers.
3. Remove the service covers.
4. Remove the plugs.
5. Pull the filters to remove.
6. Replace the filters in the reverse order.
2. Heat exchanger maintenance (once per 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.
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. Undo the 8 screws and remove the service panel.
2. Clean the heat exchanger with a compressor or a vacuum cleaner.
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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 brush.
Do not use water, aggressive solvents, or sharp objects as they may damage the impeller.
4. Supply air ow 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.
POSSIBLE REASONS AND TROUBLESHOOTING
Problem Possible reasons Troubleshooting
The fan(s) do(es) no start.
No power supply. Make sure the power supply line is connected correctly, otherwise
troubleshoot a 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 following the unit
turning on.
High current consumption caused by a short circuit. 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,
louvre 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.
SYSTEM ALARMS
Fire alarm. Emergency system shutdown on command from the fire alarm board. This
alarm interrupts the fan operation.
In case of such alarm follow the emergency instructions and leave the room
and the building.
Temperature sensor failure. Interruption or shortening in the temperature sensor circuit. This alarm
interrupts the fan operation. Contact the Seller.
Control panel failure. Control panel communication error. Check the connection of the control panel to the controller.
Contact the Seller.
Low supply air temperature. The supply air temperature is below +14 °C (factory setting). Clean or replace the extract filter. Check the unit operation settings.
Filter replacement required. Filter replacement interval expiration. Clean or replace the filters.
STORAGE AND TRANSPORTATION REGULATIONS
• Store the unit in the manufacturer’s original packaging box in a dry closed ventilated premise with temperature range +5... +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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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.
MANUFACTURER’S WARRANTY
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Unit Type Air handling unit
Seller’s Stamp
Model KOMFORT Roto EC D____
Serial Number
Manufacture Date
Purchase Date
Warranty Period
Seller
Unit Type Air handling unit
Model KOMFORT Roto EC D____
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 D____ unit is installed pursuant to the requirements stated in the present user's
manual.
Installation Stamp
Seller
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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KOMFORT Roto EC D/D2/DE/D2E250/350/650
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www.blaubergventilatoren.de
B158EN-04