Heating scrolls - PSH

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The hot solution for cooler climates and extreme conditions

Unique, simple and economical - PSH scroll compressors series
The PSH 20-40 kW range is the simple, compact, energy-efficient and economical solution for R410A commercial heat pumps with system reliability, fewer components and reduced downtime.

From innovation to benefit

The liquid injection solution extends the compressor envelope to extreme operating conditions and reduces the applied cost on the system.
The PSH Operating Control System (OCS) provides full compressor protection and higher system reliability. The OCS reduces downtime and cuts system warranty costs.

Innovative liquid injection offers new possibilities within the heating market.

Extended operating envelope

In comparison to gas or oil furnaces for space heating and Hot Sanitary Water (HSW) production, a heat pump system offers very large energy savings up to 50%. But until now, most heat pumps were limited in operating temperatures.

The unique liquid injection solution extends the compressor envelope to extreme operating conditions and reduces the applied costs on the system. Heat pump and air conditioning manufacturers will be able to use the compressor with very high condensing temperature up to 65°C and at the same time with low evaporating temperature down to -30°C. The liquid injection solution is completely integrated in the compressor and requires only an additional ¼ inch pipe connection for the liquid coming out of the condenser. The compressor is easily integrated in a system and there is no need for any additional components. Thanks to the liquid injection, the Danfoss Scrolls, PSH, will open new markets like commercial heat pumps or air conditioning applications for extreme operating temperatures.

Features and benefits

A dedicated range, optimized for heat pumps operating in cold climates and extreme conditions

Innovative liquid injection technology minimizing applied costs

A high reliability reducing downtime

 Welcome to our application development centers

Application development centers

Partner up with us to prepare for the future. At our global application development centers we offer a collaborative environment with expert support and state-of-the-art test facilities for refrigeration and air conditioning.

We are Engineering Tomorrow. Together. Today.


Type Name Language Valid for Updated Download File type
Installation guide PSH Compressors PSH038-051-064-077 German; English Multiple 15 Apr, 2021 647.4 KB .pdf
Brochure PSH heap pump 019 to 039 Nelico@- 4p brochure Chinese (CN) Multiple 29 Apr, 2016 1.4 MB .pdf
Brochure PSH heat pump full range Italian Multiple 21 Oct, 2014 607.1 KB .pdf
Brochure PSH heat pump full range brochure German Multiple 15 Oct, 2014 578.9 KB .pdf
Brochure PSH heat pump full range brochure English Multiple 13 Oct, 2014 644.2 KB .pdf



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.



COMPASS is a software program that helps you to find the best Danfoss alternative for compressors for replacement. The purpose of COMPASS is to provide a direct comparison between Danfoss and competitor products.



Find documentation on our compressors and condensing units, including brochures, catalogues, data sheets and more.

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