Selection Procedure with 580F060 example | Bryant 581A/B specification

SELECTION PROCEDURE (with 580F060 example)

580F036-151

I DETERMINE COOLING AND HEATING REQUIRE- MENTS AT DESIGN CONDITIONS.

Given:

Required Cooling Capacity (TC). . . . . . . . . . . 55,000 Btuh Sensible Heat Capacity (SHC) . . . . . . . . . . . . 40,000 Btuh Required Heating Capacity. . . . . . . . . . . . . . . 60,000 Btuh Condenser Entering Air Temp . . . . . . . . . .95 F (Summer) Evaporator Entering Air Temp. . . . . . . . . . . . . . . 80 F edb,

67 F ewb Evaporator Air Quantity . . . . . . . . . . . . . . . . . . . 2,000 cfm External Static Pressure . . . . . . . . . . . . . . . . . . . 0.6 in. wg Electrical Characteristics (V-Ph-Hz) . . . . . . . . . . 230-3-60

Vertical discharge unit with optional EconoMi$er IV required.

edb — Entering dry-bulb ewb — Entering wet-bulb

IISELECT UNIT BASED ON REQUIRED COOLING CAPACITY.

Enter Cooling Capacities table for 580F060 (page 33) at condenser entering temperature 95 F, evaporator air entering at 2,000 cfm and 67 F wb. The 580F060 unit will provide a total cooling capacity of 60,900 Btuh and a sen- sible heating capacity of 45,300 Btuh. For air entering evaporator at temperatures other than 80 F edb, calculate sensible heat capacity correction as required using the for- mula in the notes following the Cooling Capacities tables.

IV DETERMINE FAN SPEED AND POWER REQUIRE- MENTS AT DESIGN CONDITIONS.

Before entering the Fan Performance tables, calculate the total static pressure required based on unit components. From the given and the Accessory/FIOP Static Pressure table on page 70 find:

External static pressure	0.60 in. wg
EconoMi$er IV static pressure	0.12 in. wg
Total Static	0.72 in. wg

Enter the standard motor Fan Performance table 580F060 Vertical Discharge (page 39) at 2,000 cfm and 0.72 in. wg external static pressure. The standard motor cannot provide 0.87 in. wg external static pressure. Enter the alternate motor Fan Performance table for 580F060, verti- cal discharge. At 2,000 cfm and 0.72 in. wg external static pressure, find that the rpm is 1219, the Bhp is 1.31, and the watts are 1168 (interpolation required).

VDETERMINE NET COOLING CAPACITY.

Cooling capacities are gross capacities and do not include indoor (evaporator) fan motor (IFM) heat. Use the watts input power to the motor calculated in Section IV above.

IFM Watts = 1168

Determine net cooling capacity using the following formula:

Net capacity = Gross capacity – IFM heat

=60,900 Btuh – 1168 Watts

NOTE: Unit ratings are gross capacities and do not include the effect of evaporator-fan motor heat. To calculate net capacities, see Step V.

IIISELECT HEATING CAPACITY OF UNIT TO PROVIDE DESIGN CONDITION REQUIREMENTS.

In the Heating Capacities and Efficiencies table (page 9) note that the 580F060 074 will provide an output capacity of 59,200 Btuh, which is adequate for the given application.

(3.412 WattsBtuh )

=60,900 Btuh – 3985 Btuh

=56,915 Btuh

Net sensible capacity = 45,300 Btuh – 3985 Btuh = 41,315 Btuh

The calculations show that a 580F060 unit with the alter- nate motor and drive is the correct selection for the given conditions.

581A/B specifications

The Bryant 581A/B is a sophisticated rooftop unit designed for commercial heating and cooling applications, striking a balance between performance, efficiency, and versatility. This unit is engineered to cater to various building sizes and configurations, making it an excellent choice for businesses seeking reliable climate control solutions.

One of the standout features of the Bryant 581A/B is its high efficiency. With SEER ratings reaching up to 14.5, this unit can significantly reduce energy costs while providing optimal performance throughout its operational lifespan. The design incorporates advanced compressor technology, allowing for variable speed operation that not only enhances comfort but also promotes energy savings by adjusting to the real-time demands of the environment.

The Bryant 581A/B also integrates cutting-edge refrigerant technology. Utilizing Puron refrigerant, it adheres to current environmental standards, minimizing its impact on ozone depletion while maximizing cooling performance. This commitment to sustainability is complemented by energy-efficient components, including high-efficiency coils and fan motors, which further optimize energy consumption.

In terms of construction, the Bryant 581A/B is built to withstand the rigors of outdoor installation. The unit features a rugged cabinet design with durable, corrosion-resistant materials, ensuring long-term reliability even in challenging weather conditions. Additionally, the easily accessible components simplify maintenance, reducing downtime for businesses.

The functionality of the Bryant 581A/B extends beyond mere cooling and heating. It is equipped with advanced control systems that can be interfaced with building management systems, allowing for seamless integration and enhanced control over indoor climate. This technology provides operators with the ability to monitor and adjust settings remotely, ensuring a comfortable indoor environment while optimizing energy use.

Noise reduction is another important characteristic of the Bryant 581A/B. The unit is designed with sound-dampening features, making it suitable for applications where low noise levels are a priority, such as retail spaces or office buildings.

Overall, the Bryant 581A/B is a robust solution for businesses seeking efficient, reliable, and flexible climate control. Its combination of advanced technology, durable construction, and user-friendly features make it a leading choice in the commercial HVAC market.

Bryant 581A/B manual Selection Procedure with 580F060 example, Determine NET Cooling Capacity

Models: 581A/B

SELECTION PROCEDURE (with 580F060 example)

580F036-151

IISELECT UNIT BASED ON REQUIRED COOLING CAPACITY.

VDETERMINE NET COOLING CAPACITY.

581A/B specifications