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Danfoss FR8.5S Hermetic Reciprocating Compressor, R-404A/R-507


The Danfoss FR8.5S is a specialized low-temperature 1/4 HP compressor custom-tuned to handle high-density blended refrigerants like R404A. Built to handle steep compression ratios, it is well-suited for commercial reach-in freezers that require rapid sub-zero cooling. The compressor comes equipped with an augmented internal cooling system that dissipates motor heat efficiently, preventing oil breakdown during continuous low-pressure suction runs. Its heavy-duty casting dampens acoustic resonance, keeping operations exceptionally quiet even during demanding freezing cycles. For commercial establishments requiring unfailing frozen storage preservation, this compressor delivers long-term mechanical stability.

130,000 149,500

Ensure premium thermal management and long-term operating durability with the Danfoss FR8.5S. Engineered to deliver consistent and smooth compression, this 1/4 HP low-temperature hermetic reciprocating compressor relies on a precise internal mechanism engineered for high-density blended HFC refrigerants. This simplified layout minimizes routine mechanical wear, drastically limits acoustic noise output, and cuts down on structural system vibration compared to legacy generic engines, all while maintaining an eco-conscious sub-zero efficiency profile. Perfect for maintenance engineers, HVAC technicians, and facility management teams across Lagos, this robust workhorse is designed to tolerate tough field conditions, including steep compression ratios and intense low-pressure suction drops. The unit comes factory-charged with premium Polyolester (POE) oil to ensure reliable mechanical lubrication in demanding low-temperature R404A/R507 environments. Standard copper suction and discharge connection stubs make certain that technicians can pull a clean, completely leak-proof braze line during drop-in field installation.

Technical Specifications

Specification Value
Brand Danfoss (Secop)
Model Family FR-Low Temp Series Reciprocating
Model Number FR8.5S (COMROT-DNFS03)
Horsepower (HP) 1/4 HP
Refrigerant Compatibility R404A / R507 Only
Voltage / Phase / Freq 220-240V / 1-Phase / 50Hz
Application Type Low Back Pressure (LBP) Commercial Freezers
Suction Connection Size 5/16″ OD Standard Stub
Discharge Connection Size 1/4″ OD Standard Stub
Oil Type High-Purity Polyolester (POE) Oil

Shipping & Logistics Data

  • Net Weight: ~10.5 kg

  • Gross Shipping Weight (with protective packaging): ~10.9 kg

  • Product Dimensions: 26.0 cm × 18.0 cm × 21.0 cm (Box Dimensions)

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