Submittal_YSK150A4S0L0000.1745862663000.pdf

Precedent Packaged Rooftop

Unit Overview - YSK150A4S0L**000000000000000000000000000

Application Unit Size Supply Fan External Dimensions (in.) Operating Weight Elevation

DX Cooling / Gas Heat 12.5 Ton

Airflow Total Static Pressure Height Width Length

1374.0 lb 0.00 ft 5000 cfm 0.925 in H2O 4.24 ft 5.26 ft 8.30 ft

Unit Features Unit Efficiency Standard Efficiency

Refrigerant R-454B Refrigerant EER @ AHRI 10.80 Number

IEER @ AHRI 14.00 Number

Unit Electrical Voltage/phase/hertz 460/60/3

MCA 33.00 A

MOP 45.00 A

Condenser Fan FLA 1.50 A Evaporator Fan FLA 5.50 A Compressor 1 RLA 14.40 A Compressor 2 RLA 7.00 A Compressor Power 11.35 kW

System Power 14.01 kW

Controls Unit Controls Symbio 700

Cooling Section Entering Dry Bulb 80.00 F Entering Wet Bulb 67.00 F

Ambient Temp 95.00 F Leaving Coil Dry Bulb 57.37 F Leaving Coil Wet Bulb 56.60 F Leaving Unit Dry Bulb 59.23 F Leaving Unit Wet Bulb 57.34 F

Saturated Discharge Temperature 126.08 F Saturated Suction Temperature 52.82 F

Capacity Gross Total 149.65 MBh

Gross Latent 35.43 MBh Gross Sensible 114.22 MBh

Net Total 142.99 MBh Net Sensible 107.56 MBh

Net Sensible Heat Ratio 75.22 % Fan Motor Heat 3.88 MBh

Refrig Charge-Circuit 1 9.8 lb

Heating Section Heating Low Gas Heat

Input Heating Capacity 150.00 MBh Output Heating Capacity 121.50 MBh

Heating EAT 70.00 F Heating LAT 92.27 F

Heating Temp Rise 22.27 F Heating Stages 2

Fan Section Indoor Fan Data

Airflow Application Downflow Design ESP 0.500 in H2O

Component SP 0.000 in H2O Heat SP 0.425 in H2O Total SP 0.925 in H2O

Indoor Fan Drive Type Variable Direct Indoor Fan Quantity 1.00 Number

Indoor Fan Type BC Plenum

Indoor Fan Performance Airflow 5000 cfm

Supply Motor Horsepower 4.600 hp Total Supply Motor Operating

Power 2.237 hp

Indoor RPM 1520 rpm Outdoor Fan Data

Outdoor Fan Drive Type Direct Outdoor Fan Quantity 1

Outdoor Fan Type Propeller Filters

1st Filter Size and Qty 3 - 24 x 18 x 2 2nd Filter Size and Qty 3 - 18 x 18 x 2

Job Name: lee collins Prepared For:

Unit Tag: PREC-1 Quantity: 1

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Field Installed Accessories Roof curb 14" Full Perimeter Knockdown Curb

Acoustics Sound Path 63 Hz 125 Hz 250 Hz 500 Hz 1 kHz 2 kHz 4 kHz 8 kHz

Ducted Discharge 85 dB 88 dB 79 dB 75 dB 70 dB 67 dB 67 dB 67 dB Ducted Inlet 81 dB 80 dB 75 dB 65 dB 62 dB 59 dB 60 dB 58 dB

Outdoor Noise 88 dB 89 dB 90 dB 87 dB 84 dB 80 dB 75 dB 67 dB Note:Ducted Discharge/Ducted Inlet prediction data conform to AHRI 260

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General Packaged rooftop unit cooling capacities, heating capacities, and efficiencies are certified to the following standards:

- 3 to 5 ton units: AHRI Standard 210/240.

- 6 to 25 ton units: AHRI Standard 340/360.

- Gas Heating Units: ANSI Z21.47 and 10 CFR Part 431 for Commercial Warm Air.

- Convertible airflow.

- Symbio? controls operating range between 40°F and 125°F in cooling mode standard from the factory. Field-installed low ambient kit extends operating range down to 0°F.

- Factory assembled, internally wired, fully charged, and 100 percent run tested to verify cooling operation, fan and blower rotation, and control sequence.

- Colored and numbered wiring internal to the unit for simplified identification.

- cULus listed and classified in accordance for Central Cooling Air Conditioners.

- Unit shall be furnished with a leak detection system from the fact

Casing

- Zinc coated, heavy gauge, galvanized steel.

- Weather resistant pre-painted metal with galvanized substrate.

- Meets ASTM B117, 672 hour salt spray test.

- Removable single side maintenance access panels.

- Lifting handles in maintenance access panels (can be removed and reinstalled by removing fasteners while providing a water and air tight seal).

- Exposed vertical panels and top covers in the indoor air section insulated with a cleanable foil-faced, fire-retardant permanent, odorless glass fiber material.

- Base pan shall have no penetrations within the perimeter of the curb other than the raised 1 inch high downflow supply/return openings to provide an added water integrity precaution, if the condensate drain backs up.

- Base of the unit insulated with 1/8 inch, foil-faced, closed-cell insulation.

- Unit base provisions for forklift and/or crane lifting on three sides of unit.

Hail Guards

- Provides condenser coil protection.

Microchannel Coils

- Optimal heat transfer performance due to flat, streamlined tubes with small ports, and metallurgical tube-to-fin bond.

- Reduce system refrigerant charge by up to 50% leading to better compressor reliability.

- Compact all-aluminum microchannel coils reduce the unit weight.

- Recyclable all aluminum coils All aluminium construction minimizes galvanic corrosion.

- Strong aluminum brazed structure provides better fin protection.

- Flat streamlined tubes more dust resistant and easy to clean.

- Coils leak tested at the factory to ensure the pressure integrity.

Compressors

- All units have direct-drive, hermetic, scroll type compressors with centrifugal type oil pumps.

- Suction gas-cooled motor with voltage utilization range of plus or minus 10 percent of unit nameplate voltage.

- Internal overloads standard with scroll compressors.

- All units have dual compressors.

-Three stages of cooling available on 6 to 17.5 tons units and four stages of cooling available on 20 and 25 tons units.

Filters -Two inch standard filters shall be factory supplied on all units.

Frostat

- Utilized as a safety device.

- Opens to prevent freezing temperatures on evaporator coil.

- Temperature will need to rise to 50°F before closing.

- Utilized in low airflow or high outside air applications (cooling only).

Gas Heating Section

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Unit Tag: PREC-1

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-The heating section shall have a progressive tubular heat exchanger with corrosion-resistant aluminized steel tubes and burners as standard on all models.

-Stainless steel heat exchanger with 409 stainless steel tubes and 439 stainless steel burners shall be optional.

- Induced draft combustion blower shall be used to pull the combustion products through the firing tubes.

- Heater shall use a direct spark ignition (DSI) system.

- On initial call for heat, the combustion blower shall purge the heat exchanger for 20 seconds before ignition.

- After three unsuccessful ignition attempts, entire heating system shall be locked out until manually reset at the thermostat/zone sensor.

- Units shall be suitable for use with natural gas or propane (field-installed kit).

Indoor Fan

- Direct drive plenum fan design - 6 to 25 tons units.

- Plenum fan design - backward-curved fan wheel along with an external rotor direct drive variable speed indoor motor.

- Supply fan speed adjustments can be made using the Symbio 700 or Mobile App.

- Motors are thermally protected.

- Variable speed direct drive motors are high efficiency - 6 to 25 tons.

Heat Exchanger

- Compact cabinet features a tubular heat exchanger in low, medium and high heat capacities.

- Corrosion-resistant aluminized steel tubes and burners are standard on all models.

- Induced draft blower to pull the gas mixture through the burner tubes.

- Direct spark ignition and a flame sensor as a safety device to validate the flame.

Roof Curb

- Designed to mate with the unit?s downflow supply and return.

- Provide support and a water tight installation when installed properly.

- Shall allow field-fabricated rectangular supply/return ductwork to be connected directly to the curb.

- Curb shall be shipped knocked down for field assembly.

- Shall include wood nailer strips.

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