Korkean hyötysuhteen lämmöntalteenotin S&P CAD-COMPACT 4500

The S&P CAD-COMPACT 4500 ECOWATT heat recovery unit, reference 5153140600, is a high-efficiency double-flow ventilation unit designed to renew indoor air by recovering a large part of the thermal energy from the extracted air. It offers a nominal airflow of 4,165 cubic metres per hour at 150 pascals and is especially suitable for ventilation installations in commercial premises, offices, hospitality, public buildings, educational centres and other tertiary-use spaces.

The reference corresponds to the CAD-COMPACT 4500 ECOWATT N8 version, equipped with a counterflow aluminium plate heat exchanger, plug-fan fans with EC motors, separate filtration on supply and extract, an internal motorised bypass and pre-wired components up to the electrical cabinet. The ECOWATT version is supplied without integrated control system, allowing the appropriate regulation strategy for each project to be selected externally.

S&P CAD-COMPACT 4500 ECOWATT heat recovery unit

The CAD-COMPACT 4500 is part of Soler & Palau's range of high-performance compact heat recovery units. Its operation is based on two independent air circuits: one extracts stale indoor air and the other introduces fresh air from outside.

Both airflows pass through a heat exchanger without mixing directly, allowing thermal energy to be transferred from the extract air to the supply air and thus reducing the energy needs associated with building climate control.

Nominal airflow of 4,165 cubic metres per hour

S&P declares for the CAD-COMPACT 4500 a nominal airflow of 4,165 cubic metres per hour with 150 pascals of available pressure.

• Nominal airflow: 4,165 cubic metres per hour.
• Reference available pressure: 150 pascals.
• Unit size: 4500.

These performance figures place the unit within the high-capacity ventilation solutions of the CAD-COMPACT series, mainly intended for commercial or tertiary-use buildings and premises.

Counterflow plate heat exchanger

The heat recovery unit uses a counterflow aluminium plate heat exchanger. This arrangement extends the heat exchange path between both air streams and allows high levels of thermal recovery to be achieved.

The CAD-COMPACT range features exchangers certified by Eurovent, and S&P declares efficiencies of up to 88% within the family.

84.6% efficiency at nominal airflow

For the CAD-COMPACT 4500 model, the S&P technical catalogue specifies a wet efficiency of the heat recovery unit of 84.6% at nominal airflow.

This value refers to the test conditions indicated by the manufacturer:

• Outdoor temperature: -5 degrees Celsius.
• Outdoor relative humidity: 80%.
• Indoor temperature: 20 degrees Celsius.
• Indoor relative humidity: 50%.

Actual performance may vary depending on operating airflow, temperatures, humidity and the specific installation conditions.

ErP efficiency data

The specific ErP datasheet for reference 5153140600, prepared in accordance with European Regulation 1253/2014, declares a thermal efficiency of 76.6%. This figure corresponds to the ErP regulatory methodology and should not be confused with the 84.6% wet efficiency published by S&P under the nominal conditions of its technical catalogue.

Plug-fan fans with EC motors

The CAD-COMPACT incorporates plug-fan fans with backward-curved impellers and EC motors. This technology makes it possible to electronically regulate fan speed and adapt airflow to the needs of the installation when combined with a compatible control system.

The motors feature integrated electronic protection. S&P specifies IP44 protection and insulation class B for the motors in the range.

Maximum absorbed power of 2.60 kilowatts

The maximum electrical power absorbed published for the 4500 model is 2.60 kilowatts, corresponding to the sum of the two fans in the heat recovery unit.

• Maximum absorbed power: 2.60 kilowatts.
• Unit supply: three-phase.
• Voltage: 400 volts.
• Frequency: 50-60 hertz.

Three-phase 400-volt supply

Unlike the smaller sizes in the series, the CAD-COMPACT 4500 requires a three-phase 400-volt supply.

The electrical supply, protections, cable sizes and switching devices must be sized in accordance with the manufacturer's technical documentation and applicable electrical regulations.

ECOWATT version without integrated control

Reference 5153140600 corresponds to the ECOWATT variant. This version does not include an integral Plug & Play controller as standard.

The main components are supplied pre-wired up to the electrical cabinet:

• Supply fan.
• Extract fan.
• Bypass actuator.
• Differential pressure switches for dirty filter detection.
• Temperature sensors.

This makes it possible to externally incorporate the most suitable control strategy for the installation using the compatible accessories and control systems defined by S&P.

Electrical cabinet and safety switch

The heat recovery unit includes an electrical cabinet for connecting the components and an external safety switch, making electrical installation and maintenance easier.

Internal motorised bypass

All CAD-COMPACT versions include an internal bypass with actuator. This element allows air to be diverted around the heat exchanger when temperature conditions require it and the control system commands it to open.

With suitable control, it can be used for free-cooling ventilation strategies, taking advantage of outdoor air when conditions allow the need for climate control to be reduced.

F7 filter on supply air

The outdoor air introduced into the building passes through a standard filter:

• Traditional class: F7.
• ISO classification: ePM1 70%.

S&P uses a low-pressure-drop filter for supply air, helping to retain a significant proportion of the particles present in outdoor air before it is introduced into indoor spaces.

M5 filter on extract air

The circuit that extracts indoor air includes as standard:

• Traditional class: M5.
• ISO classification: ePM10 50%.

This filtration protects the inside of the unit and the exchanger from particles carried by the extracted air.

Possibility of installing a second filter

The CAD-COMPACT design allows a second additional filter to be installed inside the unit. This item is supplied as an accessory and allows the filtration level to be adapted to the specific needs of the project.

Filter clogging detection

The heat recovery unit incorporates differential pressure switches designed to detect the increase in pressure drop caused by filter clogging.

This function makes it easier to plan periodic maintenance operations and replacement of the filter elements.

Double-skin galvanised steel casing

The unit is built with a double-skin galvanised steel casing, designed to provide mechanical strength and insulation against the thermal and acoustic conditions inside the heat recovery unit.

30-millimetre thermal and acoustic insulation

In the CAD-COMPACT 4500 size, S&P specifies an internal 30-millimetre-thick mineral wool thermal and acoustic insulation.

The insulating material has an incombustible classification of A1/M0 according to the manufacturer's documentation.

700 × 440-millimetre rectangular connections

The 4500 model uses rectangular air connections, suitable for the high airflow handled by the unit.

• Connection dimensions: 700 × 440 millimetres.
• Connection type: rectangular.
• Circuits: outdoor air, supply, extract and exhaust.

Horizontal installation

The CAD-COMPACT is designed for horizontal installation. Access to filters, fans and the exchanger is made from the sides, which must be taken into account when defining maintenance spaces around the unit.

The compact layout allows the heat recovery unit to be installed in technical rooms and suspended ceilings that have sufficient structural space for a unit of this size and weight.

CAD-COMPACT 4500 dimensions

The main casing dimensions indicated in the official drawing are:

• Main length: 2,207 millimetres.
• Main width: 1,993 millimetres.
• Height: 598 millimetres.
• Air connections: 700 × 440 millimetres.
• Weight: 336 kilograms.

The technical drawing should be used to define the final installation dimensions, as it also includes the electrical cabinet, connections, maintenance access and the spaces needed to remove filters and access the fans.

Side condensate drain

The unit includes a 1/2-inch condensate drain outlet. The drain must be connected and installed in accordance with the installation instructions to ensure proper drainage of the water generated during the recovery process.

Acoustic characteristics

For the CAD-COMPACT 4500, S&P publishes the following sound pressure levels, measured in free field at 3 metres:

• Sound pressure at intake: 51 dB(A).
• Sound pressure at discharge: 64 dB(A).
• Radiated sound pressure: 50 dB(A).

The corresponding sound power levels are:

• Sound power at intake: 71 dB(A).
• Sound power at discharge: 84 dB(A).
• Radiated sound power: 70 dB(A).

The final acoustic levels on site may vary significantly depending on the ductwork, silencers, enclosures, suspended ceilings and specific installation conditions.

Minimum outdoor air temperature

S&P sets a minimum outdoor air temperature of -10 degrees Celsius for the CAD-COMPACT series.

When it is necessary to operate with lower outdoor temperatures, the manufacturer indicates the use of a preheating coil located at the outdoor air intake.

Post-heating coils as external accessories

The CAD-COMPACT range does not include additional integrated post-heating coils inside the unit. When the project requires additional thermal treatment of the supply air, S&P offers different external solutions available as accessories.

Accessible maintenance from the sides

The heat recovery unit design facilitates maintenance through independent side access. The filters can be removed from the side panels and the exchanger also has access for inspection and cleaning operations.

It is important to keep clear the areas indicated by S&P in the dimensional drawing so that filters, fans and the exchanger can be serviced without dismantling the duct installation.

Applications of the S&P CAD-COMPACT 4500

Soler & Palau recommends the CAD-COMPACT series for air renewal in installations such as:

• Commercial premises.
• Offices.
• Hospitality establishments.
• Public buildings.
• Schools and educational centres.
• Other tertiary buildings with double-flow ventilation needs.

Technical characteristics of the S&P 5153140600

• Brand: Soler & Palau.
• Series: CAD-COMPACT.
• Model: CAD-COMPACT 4500 ECOWATT N8.
• Reference: 5153140600.
• Type: high-efficiency double-flow heat recovery unit.
• Version: ECOWATT.
• Integrated control: no.
• Nominal airflow at 150 pascals: 4,165 cubic metres per hour.
• Wet efficiency at nominal airflow: 84.6%.
• Heat exchanger type: counterflow aluminium plates.
• Exchanger certification: Eurovent.
• Fans: plug-fan with backward-curved blades.
• Motor technology: EC.
• Supply filter: F7 / ePM1 70%.
• Extract filter: M5 / ePM10 50%.
• Optional second filter: yes.
• Internal bypass: yes, motorised.
• Supply: three-phase 400 volts.
• Frequency: 50-60 hertz.
• Maximum absorbed power: 2.60 kilowatts.
• Air connections: rectangular, 700 × 440 millimetres.
• Main length: 2,207 millimetres.
• Main width: 1,993 millimetres.
• Height: 598 millimetres.
• Weight: 336 kilograms.
• Installation: horizontal.
• Casing material: double-skin galvanised steel.
• Insulation: 30-millimetre thermal and acoustic mineral wool.
• Insulation classification: A1/M0.
• Condensate drain: 1/2 inch.
• Minimum outdoor air temperature: -10 degrees Celsius.
• Radiated sound pressure: 50 dB(A) at 3 metres in free field.
• Sound pressure at intake: 51 dB(A).
• Sound pressure at discharge: 64 dB(A).

Heat recovery for high-airflow installations

The S&P CAD-COMPACT 4500 ECOWATT combines a nominal airflow of 4,165 cubic metres per hour with a high-efficiency counterflow exchanger, EC motors, F7/M5 filtration, internal bypass and a robust double-skin construction.

Its three-phase 400-volt supply, 700 × 440-millimetre rectangular connections and pre-wired ECOWATT configuration without integrated control make it suitable for professional ventilation projects where high air renewal capacity and flexibility to define the control system externally are required.