What is UL standard 60335 2 89 ?

Title: A Comprehensive Guide to UL 60335-2-89: The Safety Standard for Commercial Refrigeration Appliances

The UL 60335-2-89 standard is a crucial safety guideline for commercial refrigeration appliances. Developed by Underwriters Laboratories (UL), this standard is designed to ensure the safe operation of these appliances and minimize the risk of injury or property damage. In this article, we will delve into the key aspects of the UL 60335-2-89 standard, including its scope, coverage, and safety testing requirements.

Scope and Coverage of UL 60335-2-89

a. Scope:

UL 60335-2-89 is a technical standard that covers the safety requirements for commercial refrigeration appliances, which are used for various applications, including food storage, display, and commercial use. This standard applies to various types of commercial refrigeration appliances, including but not limited to:

Refrigeration and

Coolers and refrigerators

Dishwashers

Disposable refrigeration appliances

Mobile refrigeration appliances

Refrigeration equipment for laboratory use

b. Coverage:

The UL 60335-2-89 standard provides comprehensive safety requirements for commercial refrigeration appliances. It sets guidelines for the design, construction, testing, and labeling of these appliances. The standard covers various aspects, including:

Electrical safety: ensuring that electrical components are suitable for the intended use, installed correctly, and free from electrical hazards.

Thermal safety: minimizing the risk of overheating, whether due to electrical or mechanical factors, and providing adequate heat dissipation.

Hazardous substances: limiting the use of hazardous materials, such as refrigerants and their storage.

Performance and: ensuring that appliances perform as intended, are durable, and meet long-term reliability requirements.

User interfaces: providing clear and intuitive user interfaces for controlling the appliance.

Maintenance and repair: minimizing the need for maintenance and repair, and ensuring that maintenance and repair practices are safe and effective.

Safety Testing Requirements

a. Electrical safety testing:

To ensure that commercial refrigeration appliances meet the safety requirements of UL 60335-2-89, they must undergo electrical safety testing. This testing involves measuring the appliance's electrical characteristics, such as resistance and voltage, to ensure that they are safe for use.

b. Thermal safety testing:

Thermal safety testing is also essential for commercial refrigeration appliances. This testing involves measuring the appliance's temperature rise, which is critical in ensuring that it does not exceed the appliance's maximum temperature rating.

c. Hazardous substances testing:

To minimize the risk of exposure to hazardous substances, such as refrigerants, commercial refrigeration appliances must undergo testing for their suitability for use. This testing involves measuring the appliance's exposure to various hazardous substances, such as flammable vapors and toxic gases.

d. Performance and reliability testing:

Performance and reliability testing is critical for ensuring that commercial refrigeration appliances perform as intended and meet long-term reliability requirements. This testing involves measuring the appliance's performance characteristics, such as its cooling capacity, energy efficiency, and overall performance.

e. User interface testing:

User interface testing is essential for ensuring that commercial refrigeration appliances are user-friendly and easy to use. This testing involves measuring the appliance's user interface, such as its LED display, buttons, and controls.

f. Maintenance and repair testing:

Maintenance and repair testing is critical for ensuring that commercial refrigeration appliances are safe to use and maintain. This testing involves measuring the appliance's performance after various repairs and maintenance.