Selection

Procedure Self-Contained

Following is a sample selection for a standard applied water-cooled self- contained at particular operating conditions. UseTrane Official Product Selection System, TOPSS™, for making all final selections or contact your local Trane representative.

Unit Capacities

1

Determine entering air temperature dry bulb and wet bulb and entering water temperature.

2

Refer to the Performance Data section beginning on page 32 to find gross total and sensible capacity that best meets capacity requirements.

3

Apply the cfm correction factors from the capacity correction factorTable

PD-1 on page 31 to determine gross total and gross sensible capacities at desired cfm.

4

Multiply condenser water delta T by

the total capacity cfm correction factor to determine new condenser water deltaT.

5

Using design cfm, determine static air pressure drops for accessories from the air pressure drop Charts PD-1 through PD-18. Add accessory static pressure drops to external supply and return static air pressure drops. Use the total air pressure drop to determine rpm and brake horsepower requirements from the appropriate fan curve. Note: The fan curves include refrigerant coil and internal cabinet static loses.

6

Calculate supply fan motor heat by using the following equation:

Fan motor heat (MBh) = 2.8 x fan motor brake horsepower

7

Determine net total capacity and net sensible capacity by subtracting fan motor heat from gross total capacity and gross sensible capacity.

8

Refer toTrane psychometric chart to determine leaving air temperatures.

Waterside Economizer Capacity

1

After determining that the unit will meet the required mechanical cooling capacity, determine the waterside economizer capacity by referring to the appropriate two-row (low capacity) or four-row (high capacity) waterside economizer capacity tables on pages 32-58.

2

Determine entering air temperature dry bulb and wet bulb, condenser water flow (gpm), and economizer entering water temperature.

3

Refer to the appropriate waterside economizer table to find gross total and sensible capacity and the leaving water temperature.

4

Apply the cfm correction factor for the waterside economizer from the appropriate table to determine the gross total and sensible capacities at the desired cfm.

5

Multiply the condenser water delta T by the total capacity cfm correction factor to determine the new deltaT.

6

Calculate supply fan motor heat by using the following equation:

Fan motor heat (MBh) = 2.8 x fan motor brake horsepower

7

Determine net total and sensible capacity by subtracting fan motor heat from gross total and sensible capacity.

8

Refer to theTrane psychometric chart to determine leaving air temperatures.

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PKG-PRC002-EN

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Trane PKG-PRC002-EN manual Selection, Procedure Self-Contained, Unit Capacities, Waterside Economizer Capacity
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PKG-PRC002-EN specifications

The Trane PKG-PRC002-EN is a groundbreaking packaged rooftop unit designed to meet the diverse needs of commercial and industrial spaces. This model showcases Trane’s commitment to innovation, energy efficiency, and reliability, making it a preferred choice for HVAC professionals and building owners alike.

One of the main features of the PKG-PRC002-EN is its high-efficiency design. This unit leverages advanced technologies to minimize energy consumption while ensuring optimal cooling and heating performance. Its efficient compressor, coupled with enhanced heat exchangers, significantly reduces operating costs and energy bills, aligning with today’s sustainability goals.

The PKG-PRC002-EN features a robust and durable construction, which translates to enhanced longevity and reduced maintenance requirements. Designed for ease of installation, the unit is compact and lightweight, facilitating seamless retrofitting and integration into existing systems. Furthermore, its accessible service panels allow for straightforward maintenance and repairs, thus minimizing downtime and service disruptions.

Equipped with Trane's advanced control technology, the PKG-PRC002-EN offers precise temperature management, ensuring consistent comfort across different zones within a building. The intuitive controls enable users to program schedules and adjust settings based on their specific needs, enhancing comfort while maximizing efficiency.

The model also incorporates advanced filtration options, improving indoor air quality by effectively reducing pollutants and allergens. This focus on health and safety is essential, especially in commercial settings where air quality can significantly impact occupant well-being and productivity.

Another notable characteristic of the PKG-PRC002-EN is its low noise levels during operation, which is essential for maintaining a conducive indoor environment in workplaces, retail spaces, or educational institutions. The unit's design minimizes sound transmission, creating a more pleasant atmosphere for occupants.

In summary, the Trane PKG-PRC002-EN is a highly efficient, reliable, and user-friendly rooftop unit that combines advanced technology with robust construction. Its energy-saving features, superior air quality options, and focus on quiet performance make it an excellent choice for modern commercial HVAC applications, ultimately contributing to sustainable building practices and enhanced occupant comfort.
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