Duke 216516 OEM Evaporator Coil – R-134A Refrigeration

Duke 216516 OEM Evaporator Coil – R-134A Refrigeration

The Duke 216516 Evaporator Coil is a genuine OEM refrigeration component designed for compatible Duke commercial refrigeration equipment using R-134A refrigerant. The evaporator coil provides the heat-transfer surface where refrigerant absorbs heat from the refrigerated cabinet so the equipment can maintain the intended storage temperature.

Reliable evaporator-coil performance is critical to commercial refrigeration. A coil that is leaking, corroded, restricted, physically damaged, or no longer transferring heat efficiently can contribute to poor cooling, abnormal frost patterns, extended compressor run times, uneven cabinet temperatures, or failure to maintain proper product-storage conditions.

When qualified refrigeration diagnosis confirms evaporator-coil replacement is required, using the correct Duke OEM 216516 helps restore the original heat-transfer configuration intended for compatible Duke equipment.

OEM Part Details & Specifications

• Manufacturer: Duke
• OEM Part Number: 216516
• MPN: 216516
• Part Type: Evaporator Coil
• Refrigerant Application: R-134A
• Listed Coil Dimensions: 2-1/4" x 8-1/4" x 14"
• Application: Commercial Refrigeration Equipment
• System: Evaporator / Refrigeration Circuit
• Function: Refrigerant Heat Absorption

Verified Duke Model Fitment

Published parts documentation identifies Duke 216516 with compatible refrigeration applications including:

• RUF-48
• SPS-32-AS
• SPS-32-CS
• SPS-38-AS
• DPC38-K

Fitment Note: Duke equipment can vary by serial number, production revision, refrigerant configuration, and coil connection arrangement. Always verify OEM part number 216516, complete equipment model, serial number, original coil dimensions, refrigerant connections, and mounting arrangement before ordering.

What the Duke 216516 Evaporator Coil Does

The Duke 216516 evaporator coil provides the surface where low-temperature refrigerant absorbs heat from the refrigerated cabinet. As air passes across the coil fins, cabinet heat transfers into the refrigerant circuit so cooled air can return to the refrigerated space.

Proper evaporator operation helps support:

• Stable refrigerated cabinet temperatures
• Reliable heat absorption
• Consistent cabinet pull-down
• Proper refrigerated-air circulation
• Reduced temperature fluctuations
• Normal compressor operation
• Proper food-storage conditions
• Dependable commercial refrigeration performance

R-134A Refrigeration Application

Duke 216516 is identified for an R-134A refrigeration application. Refrigerant type is an important system characteristic and should be confirmed from the equipment data plate and service documentation before sealed-system work begins.

Do not substitute an evaporator coil solely because its dimensions appear similar. Coil tubing, refrigerant connections, mounting locations, circuit design, and equipment application must also match.

Common Signs of an Evaporator Coil Problem

Qualified commercial refrigeration technicians may inspect Duke 216516 when troubleshooting conditions such as:

• Cabinet remains warmer than the intended temperature
• Cooling capacity is reduced
• Compressor runs for unusually long periods
• Visible corrosion is present on the evaporator
• Coil tubing is physically damaged
• Oil staining is visible near tubing or joints
• A refrigerant leak is confirmed at the evaporator
• Only part of the coil develops frost
• Evaporator repeatedly becomes heavily iced
• Airflow across the evaporator is restricted
• Temperature recovery after door openings becomes slow

These symptoms do not automatically confirm coil failure. Refrigerant charge, expansion devices, fan motors, defrost controls, door gaskets, temperature controls, airflow restrictions, and compressor performance can create similar symptoms. Diagnose the complete refrigeration system before replacing the evaporator coil.

Diagnosing a Warm Refrigerated Cabinet

A Duke refrigerator running warm does not automatically require an evaporator coil. Before replacing 216516, technicians should evaluate the complete refrigeration system.

Inspection may include:

• Evaporator airflow
• Evaporator fan operation
• Fan blade condition
• Evaporator frost pattern
• Refrigerant charge
• Expansion-device operation
• Compressor performance
• Condenser cleanliness
• Door gasket condition
• Temperature-control operation

Frost or Ice on the Evaporator

Heavy frost or ice accumulation does not automatically mean the evaporator coil itself is defective.

Possible causes include:

• Failed evaporator fan motor
• Restricted airflow
• Defrost-system problems
• Door gasket leakage
• Warm-air infiltration
• Drainage problems
• Temperature-control problems
• Refrigeration-system conditions

The complete airflow and refrigeration system should be inspected before condemning the coil.

Inspect the Evaporator Fan System

Airflow across the evaporator is essential for proper heat transfer. A functional evaporator coil can still produce poor cabinet performance when airflow is insufficient.

Inspect applicable:

• Evaporator fan motors
• Fan blades
• Motor rotation
• Fan guards
• Ice accumulation
• Blocked air passages
• Dirty or damaged coil fins

Inspect for Refrigerant Leakage

Oil staining, corrosion, tubing damage, or abnormal refrigeration pressures can indicate a sealed-system concern. Any suspected refrigerant leak should be confirmed by qualified refrigeration personnel using appropriate diagnostic methods.

Inspect for:

• Oil residue
• Corrosion
• Tubing damage
• Damaged joints
• Physical impact
• Confirmed refrigerant leakage

Do not replace the evaporator coil solely because cabinet temperature is elevated or the frost pattern appears abnormal.

Coil Dimensions & Connection Layout Matter

Published service-parts data identifies the Duke 216516 evaporator coil at approximately 2-1/4" x 8-1/4" x 14". These dimensions are useful identification points, but dimensions alone do not establish compatibility.

Before ordering, compare:

• Overall coil dimensions
• Finned section configuration
• Refrigerant inlet connection
• Refrigerant outlet connection
• Connection locations
• Tube orientation
• Mounting points
• Coil orientation

Do not order an evaporator coil by appearance or dimensions alone.

Technician Checks Before Ordering

Before ordering Duke 216516, verify:

• OEM part number 216516
• Complete Duke equipment model
• Equipment serial number
• R-134A refrigeration application
• Original evaporator coil markings
• Original coil dimensions
• Refrigerant connection locations
• Tube configuration
• Mounting arrangement
• Airflow configuration
• Evaporator fan arrangement

Commercial Refrigeration Applications

Duke refrigeration equipment using evaporator coils such as 216516 is commonly found in commercial foodservice applications including:

• Sandwich preparation stations
• Back-bar refrigeration
• Restaurants
• Commercial kitchens
• Bars
• Hotels
• Schools
• Hospitals
• Institutional kitchens
• Foodservice facilities

Installation & Sealed-System Service Notes

Evaporator-coil replacement requires opening the sealed refrigeration system and should be performed by qualified commercial refrigeration personnel.

Before removing the original Duke 216516 coil, document:

• Coil orientation
• Mounting locations
• Refrigerant inlet connection
• Refrigerant outlet connection
• Airflow direction
• Fan relationship
• Drainage arrangement

Compare the replacement Duke 216516 with the original coil before installation.

After replacement, qualified technicians should perform appropriate:

• Refrigerant-system leak testing
• System evacuation
• Correct R-134A charging procedures
• Operating-pressure verification
• Superheat / system-performance evaluation where applicable
• Evaporator airflow verification
• Frost-pattern inspection
• Cabinet pull-down testing

Why Correct Duke OEM Identification Matters

Commercial evaporator coils can appear similar while using different tubing arrangements, dimensions, refrigerant connections, mounting positions, and equipment applications.

Using Duke OEM part number 216516 together with the R-134A application, equipment model, serial number, and original coil configuration provides the strongest replacement reference.

Frequently Asked Questions

What is Duke 216516?

Duke 216516 is a genuine OEM evaporator coil used in compatible Duke commercial refrigeration equipment.

Is Duke 216516 for R-134A?

Yes. Published OEM parts information identifies Duke 216516 for R-134A refrigeration applications.

What dimensions are listed for Duke 216516?

Commercial service-parts data lists the coil at approximately 2-1/4" x 8-1/4" x 14". Compare the original coil and connections before ordering.

Which Duke models use 216516?

Published fitment includes RUF-48, SPS-32-AS, SPS-32-CS, SPS-38-AS, and DPC38-K applications. Always verify the complete model and serial number before ordering.

What does the evaporator coil do?

The evaporator coil absorbs heat from the refrigerated cabinet and transfers that heat into the refrigerant circuit.

Can a leaking evaporator coil cause poor cooling?

Yes. A confirmed refrigerant leak can reduce system capacity and prevent the cabinet from maintaining temperature.

Does frost on the coil mean the evaporator is bad?

No. Airflow, door sealing, fan, drainage, or refrigeration-system conditions can also produce abnormal frost patterns.

Should the evaporator fan be checked when diagnosing the coil?

Yes. Proper airflow across the coil is essential to heat transfer and refrigeration performance.

Can I replace 216516 with another evaporator coil of similar size?

No. Verify OEM number 216516, dimensions, refrigerant type, tubing configuration, refrigerant connections, mounting, model, and serial number.

Does evaporator-coil replacement require sealed-system service?

Yes. Replacement requires refrigeration-system service and should be performed by qualified commercial refrigeration personnel.

How do I confirm Duke 216516 is correct?

Verify OEM part number 216516, complete Duke model and serial number, R-134A application, original coil dimensions, connections, tubing, and mounting arrangement before ordering.

Is professional installation recommended?

Yes. Evaporator-coil replacement involves the sealed refrigeration system and should be performed by qualified commercial refrigeration technicians.

Why Buy From Parts Direct Online?

Parts Direct Online supplies OEM Duke evaporator coils, thermostats, fan motors, door gaskets, controls, refrigeration components, and related commercial foodservice replacement parts for service technicians, contractors, restaurants, bars, hotels, institutional kitchens, and foodservice facilities throughout the United States.