BLAUBERG KOMFORT EC DB 160 Heat Recovery Air Handling Unit User Manual

KOMFORT EC DB 160 Heat Recovery Air Handling Unit

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Specifications:

• Model: KOMFORT EC DB 160 / KOMFORT EC DB 250 / KOMFORT EC DB
  350

• Power: 50 W / 190 W / 410 W

• Max Air Flow: 3770 m3/h / 3200 m3/h

• Efficiency: from 82% up to 94% / from 80% up to 91%

• Energy Rating: A+

• Heat Recovery Efficiency: from 80% up to 98% counter-flow
  A

• Dimensions: 40 mm

Product Usage Instructions:

Safety Requirements:

When connecting the unit to the mains, ensure it is done through
a disconnecting device as per electrical wiring rules to allow full
disconnection under overvoltage conditions. Replace damaged supply
cords promptly by qualified personnel to prevent safety
hazards.

Disposal:

At the end of its service life, the product must be disposed of
separately and not as unsorted domestic waste.

Purpose:

The air handling unit is designed for efficient heat recovery
and air circulation.

Delivery Set:

• Air handling unit

• User’s manual

• Control panel (for units with S11 and S14 automation)

• Mounting boxes for wall flush and surface mounting (for units
  with S14 automation)

• Fastening kit

• Packing box

Unit Design and Operating Principle:

The unit operates by circulating air for heat recovery. Refer to
the compatibility table for optional equipment and unit models.

Summer Cooling Mode:

In this mode, the bypass damper is opened, allowing the intake
air to bypass the heat exchanger to maintain a constant
temperature.

FAQ:

Q: Can I connect the unit to an external switching device like

a timer?

A: No, to avoid safety hazards, the unit must not be supplied
through an external switching device.

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Heat recovery air Handling unit
KOMFORT EC DB 160 KOMFORT EC DB 250 KOMFORT EC DB 350
EN uSer’S Manual

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KoMFort ec dB 160/250/350

CONTENTS
Safety requirements………………………………………………………………………………………………………………………………………………… 2 Purpose………………………………………………………………………………………………………………………………………………………………………… 5 Delivery set…………………………………………………………………………………………………………………………………………………………………. 5 Designation key………………………………………………………………………………………………………………………………………………………… 5 Technical data……………………………………………………………………………………………………………………………………………………………. 6 Unit design and operating principle………………………………………………………………………………………………………………… 8 Installation and set- up……………………………………………………………………………………………………………………………………………. 11 Connection to power mains ………………………………………………………………………………………………………………………………. 15 Technical maintenance………………………………………………………………………………………………………………………………………….. 17 Storage and transportation regulations………………………………………………………………………………………………………….. 18 Manufacturer’s warranty……………………………………………………………………………………………………………………………………….. 19 Certificate of acceptance………………………………………………………………………………………………………………………………………. 20 Seller information…………………………………………………………………………………………………………………………………………………….. 20 Installation certificate……………………………………………………………………………………………………………………………………………… 20 Warranty card…………………………………………………………………………………………………………………………………………………………….. 20

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 DB 160/250/350 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.

SAFETY REQUIREMENTS
This unit is not intended for use by persons (including children) with reduced physical, sensory or mental capabilities, or lack of experience and knowledge, unless they have been given supervision or instruction concerning use of the unit by a person responsible for their safety. Children should be supervised to ensure that they do not play with the unit. This appliance can be used by children aged from 8 years and above and persons with reduced physical, sensory or mental capabilities or lack of experience and knowledge if they have been given supervision or instruction concerning use of the appliance in a safe way and understand the hazards involved. Cleaning and user maintenance shall not be done by children without supervision. Children shall not play with the appliance.
Connection to the mains must be made through a disconnecting device, which is integrated into the fixed wiring system in accordance with the wiring rules for design of electrical units, and has a contact separation in all poles that allows for full disconnection under overvoltage category III conditions.
If the supply cord is damaged, it must be replaced by the manufacturer, its service agent, or similarly qualified persons in order to avoid a safety hazard.

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CAUTION: In order to avoid a safety hazard due to inadvertent resetting of the thermal cutout, this unit must not be supplied through an external switching device, such as a timer, or connected to a circuit that is regularly switched on and off by the utility.
Ensure that the unit is switched off from the supply mains before removing the guard. WARNING: If there are any unusual oscillating movements, immediately stop using the unit and contact the manufacturer, its service agent or suitably qualified persons. The replacement of parts of the safety suspension system device shall be performed by the manufacturer, its service agent or suitably qualified persons. Precautions must be taken to avoid the back-flow of gases into the room from the open flue of gas or other fuel-burning appliances.
The appliance may adversely affect the safe operation of appliances burning gas or other fuels (including those in other rooms) due to back flow of combustion gases. These gases can potentially result in carbon monoxide poisoning. After installation of the unit the operation of flued gas appliances should be tested by a competent person to ensure that back flow of combustion gases does not occur. Fixing means for attachment to the ceiling such as hooks or other devices shall be fixed with a sufficient strength to withstand 4 times the weight of the appliance. The mounting of the suspension system shall be performed by the manufacturer, its service agent or suitably qualified persons. The appliance is to be installed so that the blades are more than 2.3m (2,1 m AU) above the floor.
All operations described in this manual must be performed by qualified personnel only, properly trained and qualified to install, make electrical connections and maintain ventilation units. Do not attempt to install the product, connect it to the mains, or perform maintenance yourself. This is unsafe and impossible without special knowledge. Disconnect the power supply prior to any operations with 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. Disconnect the unit from the power supply prior to any connection, servicing, maintenance, and repair operations. Connection of the unit to power mains is allowed by a qualified electrician with a work permit for the electric units up to 1000 V after careful reading of the present user’s manual. Check the unit for any visible damage of the impeller, the casing, and the grille before starting installation. The casing internals must be free of any foreign objects that can damage the impeller blades. While mounting the unit, avoid compression of the casing! Deformation of the casing may result in motor jam and excessive noise. Misuse of the unit and any unauthorised modifications are not allowed. Do not expose the unit to adverse atmospheric agents (rain, sun, etc.). Transported air must not contain any dust or other solid impurities, sticky substances, or fibrous

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KoMFort ec dB 160/250/350

materials. Do not use the unit in a hazardous or explosive environment containing spirits, gasoline, insecticides, etc. Do not close or block the intake or extract vents in order to ensure the efficient air flow. Do not sit on the unit and do not put objects on it. The information in this user’s manual was 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. Never touch the unit with wet or damp hands. Never touch the unit when barefoot. BEFORE INSTALLING ADDITIONAL EXTERNAL DEVICES, READ THE RELEVANT USER MANUALS.

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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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).

DELIVERY SET

Air handling unit

1 pc.

User’s manual

1 pc.

Control panel (only for units with S11 and S14 automation)

1 pc.

Mounting box for wall flush mounting (only for units with S14 automation)

1 pc.

Mounting box for wall surface mounting (only for units with S14 automation)

1 pc.

Fastening kit

1 pc.

Packing box

1 pc.

DESIGNATION KEY

KOMFORT EC D B X L S14

Control S11/S14/S21 Service side L – left service side R – right service side Rated air flow [m3/h] Additional components B ­ bypass Spigot orientation D ­ suspended mounting, horizontal spigot orientation Motor type EC ­ electronically commutated Unit type

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TECHNICAL DATA
The unit is designed for indoor application with the ambient temperature ranging from +1 °C up to +40 °C and relative humidity up to 60 % without condensation. In cold, damp rooms, there is a possibility of freezing or condensation inside and outside the casing. In order to prevent condensation on the internal walls of the unit, it is necessary that the surface temperature of the casing is 2-3 °C above the dew point temperature of the transported air. The unit should be operated continuously, and in cases where ventilation is not necessary, reduce the air flow of the fans to a minimum (20%). This will ensure a favorable indoor climate and reduce the amount of condensation inside the unit, which can damage electronic components. Never use the unit for dehumidification, for example, of new buildings. 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.

MODEL

KOMFORT EC DB 160 KOMFORT EC DB 250 KOMFORT EC DB 350

Supply voltage, 50 (60) Hz [V] Nominal power consumption [W] Current [A] Maximum air flow [m3/h] RPM, min-1 Sound pressure level at 3 m distance [dBA] Transported air temperature [°C] Casing material Insulation (mineral wool) [mm] Extract filter Supply filter Connected air duct diameter [mm] Weight [kg] Heat recovery efficiency Heat exchanger type SEC class

50 0.4 190 3770 26
40 mm
Ø 125 48
from 82 up to 94 %
A+

1~ 220 ­ 240 101 0.8 270 4480 28
from -25 up to +40 aluzinc steel 40 mm G4 F7 Ø 125 48
from 80 up to 98 % counter-flow A

170 1.3 410 3200 34
40 mm
Ø 160 70
from 80 up to 91 %
A+

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ØD

A

B2

B

Ø16

A

A2

A1

B3

B1

B
Ø10,2
8 holes

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L3 L4

L3 L4 H1
L3 L4

H

LEFT-HANDED MODIFICATION

A view (indoor connection)

L2

L1

L6

B view (outdoor connection)

L5

L

L2

RIGHT-HANDED MODIFICATION

A view (outdoor connection)

L2

L1

L6

B view (indoor connection)

L5

L

L2

L3 L4

Model
KOMFORT EC DB 160 KOMFORT EC DB 250 KOMFORT EC DB 350

Dimensions [mm] ØD A A1 A2 B B1 B2 B3 H H1 L L1 L2 L3 L4 L5 L6 125 1008 1105 1073 754 822 480 410 320 361 386 293 245 31 128 123 216 125 1008 1105 1073 754 822 480 410 320 361 386 293 245 31 128 123 216 160 1138 1235 1203 1044 1112 680 610 320 361 555 417 345 40 119 144 282

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UNIT DESIGN AND OPERATING PRINCIPLE
The unit has the following operating logic: warm stale extract air from the room flows into the unit, where it is filtered by the extract filter, then air flows through the heat exchanger and is exhausted outside by the extract fan. Cold fresh air from the outside flows into the unit, where it is cleaned by the supply filter. Then the air flows through the heat exchanger and is directed to the room with the supply fan. Heat energy of warm extract air is transferred to clean intake fresh air from the outside and warms it up. The air flows are fully separated while flowing through the heat exchanger. Heat recovery minimizes heat losses, which reduces the cost of space heating in the cold season. The difference between the supply and extract air flow temperature leads to condensate generation. Condensate is collected in the drain pan and is removed outside through the drain pipe.

KOMFORT EC DB … L

BOTTOM VIEW
10
1
2 3 11 4 5 6 7 12 8

KOMFORT EC DB … R

9 10

1 ­ cable glands; 2 ­ supply fan; 3 ­ control unit; 4 ­ bypass damper; 5 ­ extract filter; 6 ­ counter-flow heat exchanger; 7 ­ drain pan; 8 ­ detachable plates for technical maintenance of filters; 9 ­ drain pipe; 10 ­ SETUP MODE button (for KOMFORT EC DB 160/250/350 A21 units); 11 ­ extract fan; 12 ­ supply filter.
Additional equipment (is not included in the delivery set, can be ordered separately) Humidity sensor. The FS2 humidity sensor is connected to the controller in KOMFORT EC DB 160/250/350 A21 models, and to the terminal block in KOMFORT EC DB 160/250/350 A14 models. The HR-S humidity sensor is connected to the controller. The unit with the installed humidity sensor maintains a set indoor humidity point. 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. CO2 sensor (connected to the controller) 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 CO2 concentration is an efficient energy saving solution. VOC sensor (connected to the controller) 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. Duct preheater. The heater maintains the duct air temperature at a point that prevents the heat exchanger freezing. Heater installation and connection to the unit are described in the heater user’s manual. 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

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FS1 internal humidity sensor
FS2 internal humidity sensor CO2-1 room sensor CO2-2 room sensor Room humidity
sensor VOC room sensor
(0-10 V) CO2 room sensor
(0-10 V) Room humidity sensor (0-10 V)
Preheater Reheater

KOMFORT EC DB 160/250/350 S11

—

—

—

—

—

—

—

—

KOMFORT EC DB 160/250/350 S14

—

—

—

—

—

—

KOMFORT EC DB 160/250/350 S21

—

UNIT OPERATION MODES Heat recovery mode: warm stale extract air from the room flows into the unit, where it is filtered by the extract filter, then air flows through the heat exchanger and is exhausted outside by the extract fan. Cold fresh air from the outside flows into the unit, where it is cleaned by the supply filter. Then the air flows through the heat exchanger and is directed to the room with the supply fan. Supply air is heated in the heat exchanger by transferring the heat energy of warm and humid extract air to the cold fresh air. The air flows are fully separated while flowing through the heat exchanger. Heat recovery minimizes heat losses, which reduces the cost of space heating in the cold season.
EXHAUST AIR
SUPPLY AIR

EXTRACT AIR

INTAKE AIR

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 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 °. After temperature increase the unit returns to the previous operation mode. In KOMFORT EC DB 160/250/350 S11 units the frost protection mode must be activated, see the User’s manual of the control panel. In case of freezingdanger,thesupplyfanisturnedoffinKOMFORTECDB160/250/350 S14units.Aftertemperatureincreasetheunitreturnstotheprevious operation mode.The KOMFORT EC DB 160/250/350 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 User’s manual for the control system.

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SUPPLY AIR EXTRACT AIR

KoMFort ec dB 160/250/350
EXHAUST AIR
INTAKE AIR

Summer Cooling mode: the bypass damper is opened, the intake air that is supplied to the premises bypasses the heat exchanger. The intake air temperature remains constant.
EXHAUST AIR
SUPPLY AIR

EXTRACT AIR

INTAKE AIR

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INSTALLATION AND SET-UP
HUMIDITY SENSOR MOUNTING Remove the service panel and install the humidity sensor into the mount from the side of the extract air duct and connect the humidity sensor connector to the respective contact socket coming from the control unit. FS2 sensor:

Install the service panel back to the unit.
UNIT INSTALLATION To attain the best performance of the unit and to minimise turbulence-induced air pressure losses connect the straight air duct section to the spigots on both sides of the unit while mounting. Minimum straight air duct length: · equal to 1 air duct diameter on the intake side · equal to 3 air duct diameters on 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. Fasteners for ceiling 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.

min 200 mm

min 20 mm

min 350 mm

min 500 mm

Nut Washer Vibration-absorbing rubber Nut and lock-nut

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Wall and ceiling mounting examples

KOMFORT EC DB … L

EXTRACT AIR

SUPPLY AIR

KOMFORT EC DB … R

SUPPLY AIR

EXTRACT AIR

KOMFORT EC DB … L

EXHAUST AIR

INTAKE AIR

KOMFORT EC DB … R

INTAKE AIR

EXHAUST AIR

INTAKE AIR

EXHAUST AIR

EXHAUST AIR

INTAKE AIR

SUPPLY AIR

EXTRACT AIR

EXTRACT AIR

SUPPLY AIR

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RIGHT-HANDED AND LEFT-HANDED MODIFICATIONS The figure below shows the arrangement of spigots for left- and right-handed modifications. Choosing the right arrangement can improve the ease of installation, shorten the length of the ducts and reduce the number of air duct bends.

Cable glands

Extract air Supply air Drain pipe Drain pipe Supply air Extract air

KOMFORT EC DB … R KOMFORT EC DB … L

Cable glands

View from above

Intake air Exhaust air
Exhaust air Intake air

Extract air Supply air

KOMFORT EC DB … L

Intake air Exhaust air

KOMFORT EC DB … R
Intake air Exhaust air

Extract air Supply air

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CONDENSATE DRAINAGE Connect the drain pipe to the sewage system using the SFK 20×32 U-trap kit (available upon separate order). The pipe slope downwards
must be at least 3°.

U-trap

min 3°

Drain hose

Drain hose

Sewage system Sewage system

Drain pipe

Drain hose

Drain hose

U-trap

min 3°

Drain pipe

min 3° min 3°

The condensate drainage system is designed for normal operation in premises with air temperatures above 0 °C! If the expected ambient air temperatures are below 0 °C, the condensate drainage system must be equipped with heat insulation and pre-heating facilities.

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CONNECTION TO POWER MAINS

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ANY TAMPERING WITH THE INTERNAL CONNECTIONS IS PROHIBITED AND WILL VOID THE WARRANTY.

· The unit is rated for connection to 1~230 V/50 (60) Hz power mains according to the wiring diagram. · The connection must be made using durable, insulated and heat-resistant conductors (cables, wires). The actual wire cross section
selection must be based on the maximum load current, maximum conductor temperature depending in the wire type, insulation, length and installation method. · The external power input must be equipped with a automatic circuit breaker built into the stationary wiring to open the circuit in the event of overload or short-circuit. The position of the circuit breaker must ensure free access for quick unit power-off. The trip current of the automatic circuit breaker must exceed the maximum current consumption of the unit (refer to the “Technical data” section or to the unit label). 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 and can be ordered separately. To access the control unit, remove the service panel.

1 1

External wiring diagram for KOMFORT EC DB 160/250/350 S11 units

23 4

5

6 7 8 9 10 11 12 13 14 15 16

L N PE L

N c no c no +12V GND B A +5V GND Vo

White Green Brown Yellow
t °C

Power input 230 VAC

21 21
LN LN

12

U

(no-contact) +12V Gnd B A

+5V Gnd Vo

SM1*

Designation CCU SM1 SM2 PK1 P1 TE1

Name DX cooler Supply air damper actuator Extract air damper actuator Contact from a fire alarm panel Control panel Outdoor temperature sensor

*Is not included in the delivery set

SM2*

PK1*

P1

TE1

Model N0
LF 230 LF 230
N0

Wire** 2×0.75 mm2 2×0.75 mm2 2×0.75 mm2 2×0.75 mm2

The sensor is installed by the manufacturer in the intake air duct. ** Maximum connecting cable length is 20 m! –ELECTRIC SHOCK HAZARD!

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External wiring diagram for KOMFORT EC DB 160/250/350 S14 units The unit has an option of additional external controls connection to the X2 terminal block, which is located on the hinged electrical mounting plate of the control unit. Extra connections to the unit are shown in dotted lines in the External wiring diagram.

PK fire alarm panel (remove the jumper while connecting the contact)

Humidity sensor

Power input 230 VAC

+U 3 GND 2 0-10V 1

Control panel

Electric actuators

of the external air dampers

– Tx Rx + External device NO (CO2 sensor))

SM1 SM2 supply exhaust
L1 N L1 N

White Brown Green Yellow

X1 L
12

X2 N PE PK PK +U 0-10VGND N C GND Tx Rx +U SM-L SM-N
3 4 1 2 3 4 5 6 7 8 9 10 11 12 13

–ELECTRIC SHOCK HAZARD!

External wiring diagram for KOMFORT EC DB 160/250/350 S21 units

X1

A1

F1 L N PE L N NO NC NC C NO C Com Out1 NO In1 Com Out1 NO In1 TE_H Gnd Valve1 Valve2 KKB CO2

RS485

2.5A L1 N 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 NO C NO C NO C Gnd 0-10V +24V Gnd A B +24V

31

32

Brown White
CCU*
1 2 3 4

Power input 230 VAC

21 21 PK1 Boost

12 34 N In 90 60
EVH*

12 34 N In 90 60
ENH*

12
RT2 ENH*

**U

**U

2 121

SM1 SM2

Gnd 0-10V 24V GND +24V

CO2*

P1*

Designation S1 S2 1 CCU 1 Boost CO2 ENH ENH RT2 EVH

Name Supply air damper actuator Exhaust air damper actuator Contact from fire alarm control panel Cooler control External control panel Contacts ON/OFF Boost External CO2 sensor Channel heater (afterheater) Channel temperature sensor Channel heater (preheating)

Wire*** Contact type 2 x 0,75 mm2 NO 2 x 0,75 mm2 NO 2 x 0,75 mm2 NC 2 x 0,75 mm2 NO 4 x 0,5 mm2 2 x 0,75 mm2 NO 3 x 0,25 mm2 NO 4 x 0,5 mm2 2 x 0,25 mm2 4 x 0,5 mm2

Note 3 A, 30 V DC/~250 AC 3 A, 30 V DC/~250 AC Remove 31 jumper 3 A, 30 V DC/~250 AC
With ENH, Remove 32 jumper

Not included in the delivery set. The U supply voltage of the SM1, SM2 external dampers is selected depending on the type of dampers. Maximum connecting cable length is 20 m!

— ELECTRIC SHOCK HAZARD!

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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 (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. Vacuum cleaning is allowed. After two consecutive cleanings filters must be replaced. For new filters, contact the Seller. To clean or replace the filters, detach the removable plates located on the service side of the unit. After cleaning install the filters and the detachable plates in the reverse order.

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 is required. The heat exchanger is connected with the drain pan by the fixing bands that should be removed only in case of heat exchanger replacement. The drain pan is fixed to the unit casing using three screws. To clean the heat exchanger pull it and the drain pan out, drain the water through the pipes, then flush the heat exchanger with warm detergent solution. After cleaning install the dry heat exchanger with the drain pan back to the unit.

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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 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. 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. 6. Control unit maintenance (if necessary). The control unit is positioned inside the unit casing. For accessing the control unit remove the fixing screws on the service panel and remove it. CAUTION! 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

Problem

Possible reasons

Troubleshooting

The fan(s) do(es) not get started.

No power supply.

Low air flow. Noise, vibration.

Filters, fans or the heat exchanger are soiled.
The ventilation system is soiled or damaged. The fan impeller is soiled. Fan screw connection is loose.

Make sure the power supply line is connected correctly, otherwise troubleshoot a connection error.
Clean or replace the filters, clean the fans, and the heat exchanger.
Make sure the air ducts are clean and intact.
Clean the impellers.
Check tightening torques.

Water leakage.

The drainage system is soiled, damaged, or installed incorrectly.

Clean the drain line if necessary. Check the drain line slope angle. Make sure that the U-trap is filled with water and the drain pipes are frost protected.

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 ° to +40 ° 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 Compatibility (EMC) Directive 2014/30/EU of the European Parliament and of the Council, Low Voltage Directive (LVD) 2014/35/EU of the European Parliament and of the Council and CE-marking Council 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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KoMFort ec dB 160/250/350

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KoMFort ec dB 160/250/350

www.blaubergventilatoren.de

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www.blaubergventilatoren.de

KoMFort ec dB 160/250/350

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KoMFort ec dB 160/250/350

www.blaubergventilatoren.de

CERTIFICATE OF ACCEPTANCE
Unit Type Model
Serial Number
Manufacture Date Quality Inspector’s Stamp

Heat recovery air handling unit

SELLER INFORMATION
Seller 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

INSTALLATION CERTIFICATE

The _____ unit is installed pursuant to the requirements stated in the present user’s manual.
Company name

Address

Phone Number

Installation Technician’s Full Name

Installation Date:

Signature:

The unit has been installed in accordance with the provisions of all the applicable local and national construction, electrical and technical codes and standards. The unit operates normally as intended by the manufacturer.

Signature:

WARRANTY CARD
Unit Type Model
Serial Number
Manufacture Date Purchase Date Warranty Period Seller

Heat recovery air handling unit

Seller’s Stamp Installation Stamp
Seller’s Stamp

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