Insulation, Suction Line, Liquid Line

2-2REFRIGERATION / ELECTRICAL

Line Sizing

Refrigerant lines should be sized as shown on the refrigeration legend that is furnished for the store or according to ASHRAE guidelines. Refer to the information on the next page for branch line piping of Hussmann Equipment.

Oil Traps

P-traps (oil traps) must be installed at the base of all suction line vertical risers.

Pressure Drop

Pressure drop can rob the system of capacity. To keep the pressure drop to a minimum, keep the refrigerant line run as short as possible using a minimum number of elbows. Where

elbows are required, USE LONG RADIUS ELBOWS ONLY.

INSULATION

The suction and liquid lines should be clamped or taped together and insulated for a minimum of 30 ft (9144 mm) from the merchandiser.

Additional insulation for the balance of the liquid and suction lines is recommended wher- ever condensation drippage is objectionable or lines are exposed to ambient conditions.

SUCTION LINE

•Pitch in direction of flow.

•May be reduced by one size at one third of case run load and again after the second third. Do not reduce below the case suction line size.

•Case suction lines should enter at the top of the branch line.

Suction Line Return

LIQUID LINE

•May be reduced by one size after one half the case run load. Do not reduce below the case liquid line connection size.

•Take-offs to case liquid lines should exit the bottom of the branch liquid line. Provide an expansion loop for each evaporator take-off. (Minimum 3 in. [76 mm] loop.)

Minimum Loop 3-in. (76 mm)

Liquid Line Take Off

CONTROL SETTINGS

Merchandiser Technical Data Sheets (TDS) are shipped with this manual. The TDS provide case control settings and defrost data.

An evaporator pressure regulator or EPR (primary control) and a 3 – 5ºF (1.7 – 2.7ºC) differential thermostat (secondary control) must control refrigeration temperature. The EPR must be set to maintain the proper saturated evaporator temperature as listed in the data sheets. The thermostat must be set a couple degrees colder than the discharge air tempera- ture specified in the data sheets. The thermostat will prevent product freezing should the EPR temperature drift downward during reduced load periods (lights off, lower ambient). The thermostat will be wired to control the com- pressor motor contactor (single compressor) or a liquid line solenoid valve (parallel compressor systems).

Defrost is Off Time. Defrost control settings are listed in the data sheets. When these merchan- disers are connected to parallel compressor systems, a suction stop valve must be used to isolate the evaporator during defrost periods.

P/N 0420057_B

U.S. & Canada 1-800-922-1919 • Mexico 1-800-522-1900 • WWW.HUSSMANN.COM

P/N 0420057_B specifications

The Hussman P/N 0420057_B represents a cutting-edge refrigeration solution designed for modern retail environments, particularly those requiring efficient display systems for perishable goods. As part of Hussman's extensive product lineup, this unit integrates advanced technologies tailored to enhance both performance and energy efficiency.

One of the standout features of the 0420057_B is its state-of-the-art refrigeration system, which employs a combination of environmentally friendly refrigerants and high-efficiency compressors. This design not only supports compliance with stringent environmental regulations but also contributes to reduced energy consumption, ultimately leading to lower operational costs for retailers. The unit is built to maintain consistent temperatures, ensuring that products are stored and displayed at optimal conditions, thus prolonging freshness and quality.

Another key characteristic of the Hussman P/N 0420057_B is its user-friendly interface. Retail staff can easily monitor and adjust temperature settings, ensuring that the display conditions meet specific product requirements. This feature enhances operational efficiency and minimizes the risk of temperature-related spoilage. Additionally, digital temperature controls come equipped with alarms that alert staff to any fluctuations, acting as a safeguard for perishable inventory.

The design of the unit emphasizes practicality and aesthetics. With a sleek, modern appearance, the 0420057_B fits seamlessly into various store layouts while maximizing product visibility. The glass door design allows for enhanced product presentation, attracting customers and facilitating easy access for quick purchasing decisions.

Durability is a crucial characteristic of Hussman products, and the 0420057_B is no exception. Constructed from high-quality materials, this refrigeration unit is designed to withstand the rigors of daily retail operations. The robust build ensures longevity, reducing maintenance frequency and operational downtimes, which are critical aspects for retailers aiming to enhance their profit margins.

Moreover, the Hussman P/N 0420057_B incorporates intelligent technology, such as smart sensors that optimize energy use based on real-time conditions. This capability not only enhances energy efficiency but also supports retailers in meeting sustainability goals, making this unit a valuable addition to any eco-conscious business strategy.

In conclusion, the Hussman P/N 0420057_B is a versatile refrigeration solution that combines advanced technology, user-friendly features, and sleek design to meet the demanding needs of modern retail environments. Its focus on energy efficiency, durability, and optimal product preservation makes it an essential investment for retailers looking to enhance their operational effectiveness while ensuring customer satisfaction.