Multi Ejector Solution™

Discover why "We Love CO₂"

Yes, you heard it right. At Danfoss Cooling, We Love CO₂.

You might think that our devotion is misguided, but we can promise you that our affections are grounded in facts and modern engineering innovations. You see, despite its reputation as a pollutant, CO₂ is actually one of the most sustainable refrigerants. Unfortunately, it hasn't been possible to apply transcritical CO₂ systems in all climates – until now. Watch the video to find out why.

View the 3D model

Complete Multi Ejector portfolio for all store sizes, CO₂ systems and climates

Multi Ejector - High pressure:

The High Pressure Ejector utilizes the energy in the high pressure gas to lift gas from the suction side (MT) moving it to the parallel compressors (IT). This provides a reduction in needed compressor capacity and energy consumption.

For CO₂ refrigeration systems with parallel compression
The best solution for warm climates
Optimum for system sizing from 150 kW and up

Multi Ejector - Low Pressure:

The Low Pressure Ejector recovers energy, otherwise lost in expansion, to lift the suction pressure. This reduces the consumption of the compressors.

For CO₂ booster systems
The best solution for warm climates
Optimum for system sizing from 40-150 kW

Multi Ejector – Liquid Ejector:

The Liquid Ejector utilizes the energy in the high pressure gas to lift liquid from the suction accumulator. It works in combination with CO₂ Adaptive Liquid Management ensuring full evaporator optimization resulting in reduced energy consumption.

For both CO₂ booster systems and systems with parallel compression
Efficient in both warm and cold climates
Optimum for system sizing from 40-450 kW

Multi Ejector – Combi HP/LE:

The Combi HP/LE combines benefit of the High Pressure Ejector and the Liquid Ejector, and giving you a complete solution with only one welding point needed during installation – making it even easier to get the benefits of CO₂.

For CO₂ refrigeration systems with parallel compression
The best solution for warm climates
Optimum for system sizing from (40 to 105 kW)

Multi Ejector Solution – now with an extended family

The Multi Ejector family have recently been extended with 6 new types making it even easier to find a perfect fit for every store and system around the world.

The Danfoss family of Multi Ejectors now consist of the following members:

High Pressure – 3 types (150 kW and up)
Low Pressure – 2 types (40-150 kW)
Liquid Ejector – 5 types (40- 450 kW)
Combi HP/LE – 3 types (40 to 105 kW)

Explore Our New CO₂ Product Catalogue!

We have collected all our products and solutions for CO₂ and equipped each with a unique code number for easy reference, you can now explore our CO₂ solutions effortlessly.

Learn more

CO₂ Adaptive Liquid Management

The new CO₂ Adaptive Liquid Management (CALM) solution from Danfoss extends the portfolio of solutions for CO₂ refrigeration in food retail applications. CALM includes the ground-breaking new Liquid Ejector in combination with the innovative case controller algorithm – Adaptive Liquid Control (ALC) – ensuring optimum liquid management. With CALM, the Danfoss CO₂ portfolio offers solutions for all system types, store sizes and climates.

Read the press release

Getting supermarkets to net zero

With the world’s population expected to reach 10 billion people by 2050, sustainable food retail and storage are more important than ever. Yet this is an often-overlooked step in the decarbonization of society.

Read full case story

Product range

CTM Multi Ejector Solution

The Danfoss Multi Ejector Solution™ ensures that transcritical CO₂ applications for retailers become energy efficient in any climate.

Refrigeration pressure transmitters - Danfoss

Air Conditioning & Refrigeration Pressure Transmitters

Refrigeration pressure transmitters are used for commercial air-conditioning and for commercial and industrial refrigeration applications. They are made in stainless steel to be compatible with fluorinated and natural refrigerants and laser welding with no soft seals ensure hermetic tightness for decades.

AK-PC 782A

AK-PC 782A is complete regulating units for capacity control of compressors and condensers in a transcritical CO2 booster system with parallel compressor.

AK-CC55

AK-CC55 is designed with user experience in focus, resulting in bigger connectors and AK-CC55 Connect app. The AK-CC55 platform consist of 4 controllers. AK-CC55 Compact is a standard case controller for TXV/EEV. AK-CC55 Single Coil/UI is an advanced case controller for EEV with adaptive algorithms. AK-CC55 Multi Coil is an advanced case controller controlling from 1 to 3 EEV’s in same refrigeration section.

AK-SM 850 system manager

The Danfoss AK-System Manager (AK-SM) is a modern solution for the food retail markets. The AK-SM uses the latest technology to provide the maximum benefit to the end user, both in terms of energy saving optimization, control options and user friendly access.

How to choose the right Multi Ejector Solution™

There are three main factors to consider when designing your transcritical CO₂ system with a Multi Ejector Solution™.

View the infogram

Infographic - How to choose the right Multi Ejector Solution™

Documents

Documents
Type	Name	Language	Valid for	Updated	Download	File type
Brochure	A complete portfolio of CO₂ refrigeration solutions	Polish	Poland	27 Jun, 2023	16.7 MB	.pdf
Catalog	Danfoss CO2 catalogue - Components and controls for CO2 applications	English	Multiple	24 Nov, 2025	1.4 MB	.pdf
Catalog	Danfoss CO2 catalogue - Components and controls for CO2 applications	Dutch, Flemish	Netherlands	17 Apr, 2025	6.7 MB	.pdf
Catalog	Danfoss CO2 catalogue - Components and controls for CO2 applications	French	France	18 Oct, 2024	1.4 MB	.pdf
Catalog	Danfoss CO2 catalogue - Components and controls for CO2 applications	Spanish, Castilian	Multiple	18 Jul, 2024	1.2 MB	.pdf
Catalog	Danfoss CO2 catalogue - Components and controls for CO2 applications	Italian	Italy	17 Jul, 2024	4.3 MB	.pdf
Brochure	Discover the opportunities of CO2 refrigeration	English	Multiple	24 Nov, 2025	35.1 MB	.pdf
Article	DKRCE.PE.001.C1.02 _The Danfoss Multi Ejector range	English	Multiple	27 Mar, 2019	1.6 MB	.pdf
Application guide	High Pressure lift ejector and Liquid Ejector systems – Application Guide	English	Multiple	06 Oct, 2020	8.3 MB	.pdf
Application guide	Low pressure lift ejector system - Application Guide	English	Multiple	24 Aug, 2020	8.1 MB	.pdf
Brochure	Save energy and protect the environment with CO2 solutions	Spanish, Castilian	Spain	09 Jan, 2024	25.4 MB	.pdf
Brochure	Save energy and protect the environment with CO2 solutions	Italian	Italy	12 Dec, 2023	16.5 MB	.pdf
Brochure	Save energy and protect the environment with CO2 solutions - Special version for Food Retail	French	Multiple	02 Jul, 2018	3.4 MB	.pdf
Brochure	Save energy and protect the environment with CO2 solutions - Special version for Food Retail	Ukrainian	Ukraine	20 Jun, 2023	14.6 MB	.pdf
Brochure	Save energy and protect the environment with CO2 solutions - Special version for Food Retail	French	France	04 Aug, 2022	11.7 MB	.pdf
Brochure	Save energy and protect the environment with CO2 solutions - Special version for Food Retail	German	Multiple	14 Jun, 2023	11.7 MB	.pdf
Article	Selecting the right evaporator injection algorithm – Article	English	Multiple	25 Feb, 2019	697.6 KB	.pdf

Software

Coolselector®2: We did complex — you do awesome

Coolselector®2 features unbiased calculations for the selection of refrigeration and air conditioning components based on the user's requirements or based on standard operating conditions.

Coolselector®2

Support

Danfoss Multi Ejector – High Pressure – working in warm and cold ambient temperatures

Danfoss Liquid Ejector – Working in warm and cold ambient temperatures

Middle East's first transcritical CO2 supermarket using Danfoss ejector technology

Danfoss Multi Ejector Solution™ | How does it operate?

Danfoss Multi Ejector – Low Pressure – Working in warm and cold ambient temperatures

Danfoss Multi Ejector Solution – How it works

Danfoss Multi Ejector Solution™ | A brief introduction

Danfoss Multi Ejector Solution™ | Service best practices

Case stories

The Danfoss Multi Ejector range for CO2 refrigeration: design, applications and benefits

The Danfoss Multi Ejector range for CO₂ refrigeration: design, applications and benefits

Danfoss offers a complete portfolio of gas and liquid ejectors that provide significant benefits in CO₂ refrigeration applications. Here we take a closer look at these offerings: the Multi Ejector Low Pressure (LP), the Multi Ejector High Pressure (HP), and the Liquid Ejector (LE). All three ejector products are only available as a complete Multi Ejector Solution™ where the ejector is bundled with the AK-PC 782A pack controller to provide the robust system controls necessary for efficient and reliable operation.