AIR HANDLING UNIT

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 Reneo S(E) (-E) (CF) 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.

Ensure that the unit is switched off from the supply mains before removing the guard.

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.

Do not attach the product to the support using glue or adhesives. Use only the fastening method specified in the "User's manual".

General Operation and Safety Guidelines

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.

Transported air must not contain any dust or other solid impurities, sticky substances, or fibrous 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.

Disposal: The product must be disposed of separately at the end of its service life. Do not dispose of the unit as unsorted domestic waste.

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

Designation Key

The designation key explains the model codes. For example, in "Reneo S E 210 - E L S21 CF":

• Air flow control: 'S' (default) or 'CF' (constant flow).
• Controller: 'S21' or 'S14'.
• Casing design: 'L' for left, 'R' for right.
• Heat exchanger type: '-' (heat recovery) or 'E' (energy recovery).
• Rated air flow [m³/h]: e.g., 210, 240, 270.
• Heater: '-' (no heating) or 'E' (electric preheating).
• Casing type: 'S' (vertical).
• Unit series: 'Reneo'.

Technical Data

The unit is designed for indoor application with an 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. To prevent condensation on the internal walls, the casing surface temperature must be 2-3 °C above the dew point temperature of the transported air.

The unit should be operated continuously. If ventilation is not necessary, reduce fan airflow to a minimum (20%) to ensure a favorable indoor climate and reduce condensation. Never use the unit for dehumidification.

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; some models may differ slightly from those described in this manual.

*The unit is equipped with an enthalpy heat exchanger, which does not require condensate drainage.

Dimensions [mm]

The unit has the following dimensions:

• Overall Height: 1003 mm
• Overall Width: 598 mm
• Overall Depth: 452 mm
• Air duct connection diameter: Ø122x4 mm
• Spigot spacing (example): 273 mm center-to-center, 90 mm offset.
• Internal component clearances (example): 190 mm, 123 mm.
• External component dimensions (example): 200 mm.

Diagrams show front, side, and top views with overall dimensions and connection port layouts.

Design and Operating Principle

The unit operates by extracting warm, humid air from rooms, cleaning it with an extract filter, and moving it through a heat exchanger before exhausting it outside via the extract fan. Simultaneously, cold fresh air from outside is drawn in, cleaned by a supply filter, and passed through the heat exchanger. Here, heat energy from the extract air is transferred to the supply air, warming it before it is delivered to the room by the supply fan. The air streams are fully separated within the heat exchanger. This heat recovery process minimizes heat losses, reducing heating costs.

Unit Design Components:

• 1 - Supply fan
• 2 - Extract filter
• 3 - Heat exchanger
• 4 - Control unit
• 5 - Extract fan
• 6 - Bypass damper actuator
• 7 - Supply filter
• 8 - Humidity sensor (optional)
• 9 - CO2 sensor (optional)
• 10 - Heater

The unit features a removable panel for filter maintenance. The control unit is located on top. Power and grounding cables connect via glands on the side wall. Condensate may form in the heat exchanger due to temperature differences and is collected in a drain pan, then removed via drain pipes.

Additional Equipment (Optional):

• Humidity sensor: Maintains a set indoor humidity level. The system increases fan speed when extract air humidity rises above the set point and returns to the previous mode when it drops below.
• CO2 sensor: Measures room CO2 concentration and controls fan performance for efficient energy saving.

Unit Operation Modes

Heat Recovery Mode:

This is the primary mode where warm extract air heats cold supply air via the heat exchanger. Air streams are separated.

Diagrams illustrate air flow paths labeled A (exhaust air), B (intake air), C (supply air), D (extract air).

No Heat Recovery Mode:

In this mode, the bypass air damper is open, allowing supply air to flow from outdoors directly into the room, bypassing the heat exchanger. Extract air flows through the heat exchanger to the outside.

Diagrams illustrate air flow paths labeled A (exhaust air), B (intake air), C (supply air), D (extract air).

Frost Protection:

A freezing danger is detected if exhaust air temperature downstream of the heat exchanger is below +5 °C (or +3 °C without preheating) and intake air temperature upstream is below -3 °C (for units with preheating).

The unit activates frost protection based on sensor data. The sensor is in the supply air duct behind the heat exchanger. Frost protection activates when extract air temperature reaches +3 °C and reverts to the previous mode when it rises. For Reneo S14, the supply fan turns off during freezing danger. Reneo S21 offers three frost protection modes: periodic supply fan shutdown via bypass, or using the electric preheater.

Mounting and Set-up

Installing and Connecting Sensors:

Humidity and CO2 sensors are optional and ordered separately. They are installed onto a mounting bracket using screws and connected to appropriate connectors.

Unit Installation:

For optimal performance and minimal air pressure loss, connect straight air duct sections to the unit spigots. Minimum straight air duct length: 1 air duct diameter on the intake side, 3 air duct diameters on the extract side. Air ducts should be slipped over unit flanges until tight. Flexible ducts require a metal worm clamp.

If air ducts are short or disconnected, protect unit parts from foreign objects. A protective grille (mesh width max 12.5 mm) can be used to prevent unauthorized access to the fan.

Ensure convenient access for subsequent maintenance and repair during installation.

Unit Design Types and Clearances

The unit is available in left (L) and right (R) design types to ensure comfortable installation and access.

Diagrams show the L and R units with air flow indicators (A, B, C, D).

Minimum distances to surfaces: A minimum clearance of 1 meter is indicated from surfaces.

Mounting Methods

The mounting surface must be smooth to prevent casing skew and operational disruption.

Screws and fasteners are not included and should be selected by a qualified technician based on mounting surface material and unit weight.

Unit Wall Surface Mounting:

Use dowels and screws (ordered separately) to secure the unit to the wall. Insert dowels, tighten screws, and suspend the unit.

Unit Floor Mounting:

Place the unit on pre-mounted floor supports (minimum 150 mm high) to ensure sufficient access for drain pipe connection, U-trap, and condensate drainage system installation.

Diagrams illustrate the process of fixing the unit.

Condensate Drainage

Reneo S(E) 210/240/270 heat recovery units require condensate drainage via a supplied drain pipe.

Installation involves removing the front panel, heat exchanger lid, and heat exchanger. The drain pipe is then installed, followed by attaching a U-trap. The drain pipe, U-trap, and sewage system are connected using metal, plastic, or rubber pipes. The minimum downward slope for pipes must be 3°.

Diagram shows the condensate drainage system: 1 - drain pipe, 2 - connecting pipe, 3 - U-trap, 4 - connecting pipe, 5 - sewage system.

Ensure free drainage through the sewage system before operation. Fill the U-trap with water. The system is designed for ambient temperatures above 0 °C. For temperatures below 0 °C, heat insulation and pre-heating are required.

Note: The Reneo S(E) 210/240/270-E modification does not require condensate drainage.

Connection to Power Mains

Warning: Any tampering with internal connections is prohibited and will void the warranty.

The unit connects to power mains with parameters specified in the "Technical data" section, using durable, insulated, and heat-resistant conductors. Wire cross-section selection depends on load current, conductor temperature, wire type, insulation, length, and installation method.

Connection must follow the wiring diagram and terminal layout. The external power input requires an automatic circuit breaker (QF) for overload or short-circuit protection, with easy access for power-off. The circuit breaker's trip current must exceed the unit's maximum current consumption. The circuit breaker is not included and can be ordered separately.

Important Cable Laying Instructions:

• DO NOT LAY THE CABLE IN CLOSE PROXIMITY AND PARALLEL TO THE CONTROL PANEL CABLE!
• DO NOT COIL THE CONTROL CABLE IN LOOPS WHILE LAYING IT.

Diagram shows access to the terminal block.

External Wiring Diagrams

Detailed wiring diagrams are provided for units with S14 and S21 control panels.

For Units with S14 Control Panel:

The diagram shows connections for power input (230 VAC), external control panel (P1), CO2 sensor (CO2*), fire alarm panel (PK1*), and external dampers (SM1*/SM2*).

Note: The device is not included in the delivery set. Delivered upon custom request.

For Units with S21 Automation:

The diagram shows connections for power input (230 VAC), duct heater (ENH*), supply damper actuator (SM1*), extract damper actuator (SM2*), fire alarm panel (PK1*), cooler control (CCU*), external control panel (P1*), and inline temperature sensor (ENH RT2**).

Note: *The device is not included in the delivery set. Delivered upon custom request. **The supply voltage U of the external dampers SM1, SM2 is selected based on the type of the damper.

Warning: Electric shock hazard!

Technical Maintenance

Maintenance operations are required 3-4 times per year and include general cleaning and specific tasks.

1. Filter Maintenance:

Clogged filters increase air resistance and reduce supply air volume. Clean filters as required, but at least 3-4 times per year. Vacuum cleaning is permitted. After two consecutive cleanings, filters must be replaced. Contact the Seller for new filters.

To clean or replace filters, detach the removable lid on the front service side panel. Install filters in reverse order after cleaning.

2. Heat Exchanger Maintenance (once per year):

Dust accumulation on the heat exchanger can reduce efficiency. Regular cleaning is required.

To clean the heat exchanger, remove it from the unit after unscrewing the front panel. Clean using compressed air or a vacuum cleaner. Re-install in reverse order.

3. Fan Maintenance (once per year):

Dust accumulation inside fans can reduce performance. Clean fans with a soft cloth, brush, or compressed air. Do not use water, aggressive solvents, or sharp objects.

4. Maintenance of Air Intake Devices (twice per year):

Check and clean the supply grille for clogs (leaves, objects) that reduce performance.

5. Ductwork System Maintenance (once in 5 years):

Regular maintenance may not prevent dirt accumulation in air ducts, leading to pollution and reduced capacity. Duct maintenance involves cleaning or replacement.

6. Control Unit Maintenance (as required):

The control unit is inside the casing. Access it by removing fixing screws on the panel and lifting the lid.

Troubleshooting

Storage and Transportation Regulations

• Store the unit in the manufacturer's original packaging box in a dry closed ventilated premise with temperature range from +5 °C to +40 °C and relative humidity up to 70%.
• Storage environment must not contain aggressive vapors and chemical mixtures provoking corrosion, insulation, and sealing deformation.
• Use suitable hoist machinery for handling and storage operations to prevent possible damage to the unit.
• Follow the handling requirements applicable for the particular type of cargo.
• The unit can be carried in the original packaging by any mode of transport provided proper protection against precipitation and mechanical damage. The unit must be transported only in the working position.
• Avoid sharp blows, scratches, or rough handling during loading and unloading.
• Prior to the initial power-up after transportation at low temperatures, allow the unit to warm up at operating temperature for at least 3-4 hours.

Manufacturer's Warranty

The product complies with EU norms and standards on low voltage guidelines and electromagnetic compatibility, including EMC Directive 2014/30/EU and Low Voltage Directive (LVD) 2014/35/EU.

The manufacturer warrants normal operation for 24 months from the retail sale date, provided the user observes transportation, storage, installation, and operation regulations. Malfunctions due to the manufacturer's fault during the warranty period will be eliminated by warranty repair free of charge. This includes component replacement or repair.

The warranty repair does not include:

• Routine technical maintenance
• Unit installation/dismantling
• Unit setup

To benefit from warranty repair, provide the unit, user's manual with purchase date stamp, and payment paperwork. The unit model must match the manual.

The manufacturer's warranty does not apply to the following cases:

• User's failure to submit the unit with the entire delivery package.
• Mismatch of unit model and brand name.
• User's failure to ensure timely technical maintenance.
• Damage to the unit casing and internal components caused by the user.
• Redesign or engineering changes to the unit.
• Replacement with unapproved assemblies, parts, or components.
• Unit misuse.
• Violation of installation or control regulations.
• Connection to power mains with incorrect voltage.
• Unit breakdown due to voltage surges.
• Discretionary repair by the user or unauthorized persons.
• Expiration of the warranty period.
• Violation of transportation or storage regulations.
• Wrongful actions by third parties.
• Breakdown due to force majeure (fire, flood, earthquake, war, etc.).
• Missing seals.
• Failure to submit the user's manual with purchase date stamp or payment paperwork.

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.

Certificate of Acceptance

Seller Information

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.

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

Manufacturer Information

Manufacturer: Ventilation Systems LLC, Ukraine, Kyiv, 1 M. Kotsyubynskoho Street

Address of production facilities: Ukraine, Kyiv Region, Fastiv District, Boyarka, 36 Sobornosti Street

Website: www.blaubergventilatoren.de