Krack expands condensing unit offering with more lower horsepower scroll compressors for DOE 2020

Date: 17 September 2021
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Krack expands condensing unit offering with more lower horsepower scroll compressors for DOE 2020 and new CARB 50 pound charge requirements.

High Efficiency (HE) H-Series Condensing Units are designed and tested to provide an Annual Walk-In Energy Factor (AWEF) required to label units for WICF applications and a great solution to meet California’s CARB 50 pound new store charge requirements.*

The minimum AWEF ratings vary for coolers ranging from 32˚F to 55˚F and freezers below 32˚F by condensing unit location (indoor or outdoor). Refrigerated spaces (55˚F or less) and 3,000 square feet or less regardless of application are in scope for the new regulation which covers air cooled condensing units. Out of scope for this regulation are water-cooled, remote condensing, satellite units or condensing units designed to serve more than one refrigeration load. There are no restrictions on using the more efficient units for non-regulated applications like refrigerated display cases or larger WICFs.

Krack has made substantial investments in design and testing to ensure a broad range of condensing units are available to provide application solutions for your WICF needs. Krack’s exceptional sales, application, and design teams are ready to answer any questions and assist in selection of units for the new regulation.

* New store 50 pound charge requirements go into effect January 1, 2022.


  • Broad range of DOE compliant condensing units for WICF applications that have a chilled storage area of 3,000 squarefeet or less
  • Up to five different compressor solutions
  • Condensing units equipped with PSC fan motors operating at ¼ HP and 1075 RPM
  • New front grille design that reduces static air pressure prevalent with legacy H-Series units
  • Multiple refrigerants available including R-404A, R-407A, R-407F, R-448A, R-449A, and R-507A
  • Voltages available in 208/1/60 (Copeland Scroll only), 208/3/60, and 460/3/60


  • Engineered with a deeper pitch, more efficient fan blade design to maximize air flow
  • Over 980 Low and Medium Temperature condensing unit models available that meet DOE AWEF rating compliance for indoor and outdoor applications
  • Electrical panel moved from front to side panel providing greater access for larger compressors for application on medium size bases
  • Outdoor High Efficiency H-Series units now come standard with an adjustable head pressure control / hold back valve
  • Multi-fan High Efficiency H-Series units now come standard with an ambient temperature control for cycling off half the fans at approximately 40 °F using Johnson Controls A421

*Medium temperature: room temperature above 32 °F; Low Temperature: Room Temperature 32 °F and below.

Find out more on our website about: refrigeration, condensing unit, Copeland

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