What is UL 672?

UL 672 is a technical standard set by Underwriters Laboratories (UL), an independent testing and certification organization. The standard applies to the safety requirements for refrigeration units, more specifically, liquid-overfeed unit coolers.

The Purpose of UL 672

The primary purpose of UL 672 is to ensure the safe operation of liquid-overfeed unit coolers in commercial and industrial refrigeration systems. These units are commonly used to cool large spaces, such as warehouses, supermarkets, and food processing plants. By adhering to the requirements outlined in UL 672, manufacturers and operators can minimize risks associated with these cooling units.

Key Requirements of UL 672

UL 672 establishes various requirements that liquid-overfeed unit coolers must meet to achieve compliance. Some of the key requirements include:

Construction and materials: The standard specifies the materials that should be used for constructing unit coolers. It also outlines guidelines for proper assembly and structural integrity.

Electrical safety: UL 672 addresses electrical safety concerns, ensuring that wiring and components within unit coolers meet specific safety standards.

Performance and reliability: The standard sets performance criteria for unit coolers, including heat transfer rates and efficiency. It also requires units to undergo rigorous testing to assess their reliability under different operating conditions.

Safety controls: UL 672 mandates the inclusion of safety controls, such as pressure relief valves and temperature limiting devices, to prevent system failures or catastrophic incidents.

Importance of UL 672 Compliance

Complying with UL 672 is crucial for both manufacturers and end-users of liquid-overfeed unit coolers. For manufacturers, adherence to the standard ensures that their products meet strict safety and performance requirements, enhancing their reputation and market credibility. End-users benefit from knowing that the cooling units they use have undergone rigorous testing and meet industry safety standards, reducing the risk of accidents or equipment failure.