Systemair Cleva Heat Recovery Units

Introduction to Cleva Heat Recovery Units

In most buildings, floor space is at a premium, making it necessary to use a heat recovery solution that can be installed in the false ceiling. The new Systemair Cleva heat recovery units are a cost-effective solution that achieves a comfortable indoor climate in the smallest possible space. Cleva offers high energy efficiency and low noise levels without compromising on performance. Thanks to its compact design, it is ideal for commercial premises, offices, or schools.

Right Choice: Cost-effective heat recovery solution that improves indoor air quality.

Right Here: Manufactured entirely in Systemair's production centre in Madrid.

Right Now: Large stock availability ensures prompt delivery of equipment.

Cleva at a Glance: Compact Dimensions with Energy Efficiency

The heat recovery units in the Cleva range are highly efficient due to their plate heat exchanger, which offers a high level of air tightness. This design results in an efficiency of up to 83% and low pressure drop, ensuring minimum electricity consumption.

Key Features:

• 6 sizes available.
• Flow rates ranging from 500 to 4,500 m³/h.
• Enclosure with C5 corrosion resistance according to ISO 12944.
• Integrated control system.
• Suitable for indoor or outdoor installation.
• Reduced unit height.
• Panels with interchangeable inlets and outlets, allowing for different air inlet and outlet configurations.
• Design optimized for easy maintenance.

Heat Recovery

Features an exclusive fin design to guarantee high performance and low pressure drop across the heat recovery process. The plates are joined by means of a double fin to ensure high levels of sealing.

Filtration

As an accessory or option, additional filters can be installed in both the return and supply air flows. A filter module can also be installed externally to the unit.

Filter Combinations:

EC Fans and Optional Features

EC Fans

Equipped with EC fans featuring backward curved impellers and integrated electronic protection for voltage variations and reduced SFP values. The fans are supplied with 230V/I/50 Hz and 400V/III/50 Hz power supply and IP 54/55 protection, depending on the model.

Optional Features:

• Outdoor roof installation module.
• Module with cold, hot, or DX water coil.
• Module with impulsion filtration stage.
• Brackets for false ceiling or floor installation.
• Option for changing air flow direction (return for supply).

Control System

Cleva units are equipped with an electrical panel incorporated within the unit, featuring IP65 protection, and a controller for managing all unit components. This system simplifies connection, configuration, and control.

Control Features:

• Control of the free-cooling damper: The free-cooling/free-heating damper opens when the outside air temperature is lower/greater than the return air temperature, based on the defined set-point.
• Remote on/off: Units can be switched on or off remotely via a digital input (DI), BMS, or the control unit.
• Selection of three speeds: Units offer three speeds: idle, eco, and comfort, to suit user needs.
• Probe reading: The control system allows reading of probes that measure outdoor and room air temperature.
• Dirty filter pressure switch: The control unit warns when air filters are clogged and require changing.
• BMS Connection: Provides simplified configuration for connection to BMS via Modbus RTU and BACnet IP communication.

Control Optionals:

• Constant flow control on both air flows.
• Constant pressure control in both air flows.
• Air flow control by CO2 probe.
• Additional filtering stage pressure switch in the supply air flow.
• Control by supply air temperature or by cascade.
• Cooling, heating, or cooling/heating stage control (water or DX).
• 0-10V output (actuators and valves not supplied).
• Ambient control unit with functions for changing operating modes, modifying setpoints, alarm management, time programming, and overwriting.

Operating Modes

Cleva heat recovery units offer flexibility and efficiency in every mode of operation, adapting to seasons and user preferences to create a comfortable environment.

Winter Mode:

Description: Outdoor air at 5°C BS / 3.6°C BH enters the unit. Exhaust air at 8.5°C BS / 6.6°C BH leaves. Extract air at 25°C BS / 14°C BH is processed, and supply air at 21.5°C BS / 11.5°C BH is delivered.

Summer Mode:

Description: Outdoor air at 35°C BS / 24°C BH enters the unit. Exhaust air at 33.3°C BS / 20.6°C BH leaves. Air extraction at 25°C BS / 18°C BH is processed, and supply air at 26.8°C BS / 21.7°C BH is delivered.

Technical Data

This table provides key technical specifications for the Cleva range.

Notes:
1. Filters not included as standard. Filter classes according to ISO 16890.
2. Conditions:
Winter: Outside air: 5°C BS - 3.6°C BH. Extract air: 25°C BS - 14°C BH.
Summer: Outside air: 35°C - 24°C BH. Extract Air: 25°C - 18°C BH.
3. Consumption without optionals.

Configurations and Sound Levels

Cleva Overall Dimensions:

Table detailing the dimensions, weight, and connection sizes for the Cleva units (without optionals).

Diagram: Illustrates the unit's dimensions, showing width (W), length (L), height (H), and duct connection diameters.

Sound Levels:

Table detailing sound pressure and power levels across various frequency bands for the Cleva units.

Notes:
1. Data obtained with nominal flow rate and density 1.2 kg/m³. Air filters ePM10 70% (M6) in extraction and ePM1 55% (F7) in supply, with available pressure of 75 Pa in both air flows.
2. Sound pressure of the unit, in free discharge at 2 m distance.

Selection Curves

The following graphs illustrate the performance characteristics of the Cleva units, showing available pressure in Pascals versus air flow in m³/h for different filter combinations.

Cleva 500 Selection Curve:

Graph showing available pressure [Pa] versus air flow [m³/h] for Cleva 500, with curves for filter combinations: ePM10 70% (M6), ePM1 55% (F7), ePM10 60% (M5) + ePM1 55% (F7), and ePM1 55% (F7) + ePM1 80% (F9).

Cleva 1000 Selection Curve:

Graph showing available pressure [Pa] versus air flow [m³/h] for Cleva 1000, with curves for filter combinations: ePM10 70% (M6), ePM1 55% (F7), ePM10 60% (M5) + ePM1 55% (F7), and ePM1 55% (F7) + ePM1 80% (F9).

Cleva 1500 Selection Curve:

Graph showing available pressure [Pa] versus air flow [m³/h] for Cleva 1500, with curves for filter combinations: ePM10 70% (M6), ePM1 55% (F7), ePM10 60% (M5) + ePM1 55% (F7), and ePM1 55% (F7) + ePM1 80% (F9).

Cleva 2000 Selection Curve:

Graph showing available pressure [Pa] versus air flow [m³/h] for Cleva 2000, with curves for filter combinations: ePM10 70% (M6), ePM1 55% (F7), ePM10 60% (M5) + ePM1 55% (F7), and ePM1 55% (F7) + ePM1 80% (F9).

Cleva 3000 Selection Curve:

Graph showing available pressure [Pa] versus air flow [m³/h] for Cleva 3000, with curves for filter combinations: ePM10 70% (M6), ePM1 55% (F7), ePM10 60% (M5) + ePM1 55% (F7), and ePM1 55% (F7) + ePM1 80% (F9).

Cleva 4000 Selection Curve:

Graph showing available pressure [Pa] versus air flow [m³/h] for Cleva 4000, with curves for filter combinations: ePM10 70% (M6), ePM1 55% (F7), ePM10 60% (M5) + ePM1 55% (F7), and ePM1 55% (F7) + ePM1 80% (F9).

Contact Information

Systemair España
Calle Montecarlo 14
Fuenlabrada, Madrid 28942
Tel: +34 916 00 29 00
Email: info@systemair.es
Website: www.systemair.com/es-es/