Bryant 548J*14D installation instructions Installation Instructions

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548J*14D

SINGLE PACKAGE ROOFTOP HEAT PUMP

WITH WITH PURONR (R-410A) REFRIGERANT SIZE 14

Installation Instructions

NOTE: Read the entire instruction manual before starting the installation.

TABLE OF CONTENTS

SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . 1 INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Jobsite Survey . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Step 1 - Plan for Unit Location . . . . . . . . . . . . . . . . . . 4 Roof Mount . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Step 2 - Plan for Sequence of Unit Installation . . . . . . 5 Curb-Mount Installation . . . . . . . . . . . . . . . . . . . . . 5 Pad-Mount Installation . . . . . . . . . . . . . . . . . . . . . . 5 Frame-Mount Installation . . . . . . . . . . . . . . . . . . . . 5 Step 3 - Inspect Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Step 4 - Provide Unit Support . . . . . . . . . . . . . . . . . . . 5 Roof Curb Mount . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Slab Mount (Horizontal Units Only) . . . . . . . . . . . 5 Alternate Unit Support . . . . . . . . . . . . . . . . . . . . . . 5 Step 5 - Field Fabricate Ductwork . . . . . . . . . . . . . . . . 7 For Units with Accessory Electric Heaters . . . . . . 7 Step 6 - Rig and Place Unit . . . . . . . . . . . . . . . . . . . . . 7 Step 7 - Convert to Horizontal & Connect Ductwork . 8 Step 8 - Install Outside Air Hood . . . . . . . . . . . . . . . . 8 Economizer Hood Removal and Setup . . . . . . . . . 8 Two Position Damper Hood Removal and Setup . . 9 Economizer Hood and Two-Position Hood . . . . . 10 Step 9 - Install External Condensate Trap and Line . 10 Step 10 - Make Electrical Connections . . . . . . . . . . . 11 Field Power Supply . . . . . . . . . . . . . . . . . . . . . . . . 11 Units without Factory-Installed Disconnect . . . . 13 Units with Factory-Installed Disconnect . . . . . . . 13 Convenience Outlets . . . . . . . . . . . . . . . . . . . . . . . 13 Factory-Option Thru-Base Connections . . . . . . . 15 Units without Thru-Base Connections . . . . . . . . . 15 Field Control Wiring . . . . . . . . . . . . . . . . . . . . . . . 15 Thermostat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Unit without Thru-Base Conversion Kit . . . . . . . 16 Heat Anticipator Settings . . . . . . . . . . . . . . . . . . . 16 Electric Heaters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Single Point Boxes . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Heater Low-Voltage Control Connections . . . . . . 17 Outdoor Air Enthalpy Control . . . . . . . . . . . . . . . . . 18 Differential Enthalpy Control . . . . . . . . . . . . . . . . 18 Return Air Enthalpy Sensor . . . . . . . . . . . . . . . . . 18 RTU-MP Control System . . . . . . . . . . . . . . . . . . . . . . 19 Supply Air Temperature (SAT) Sensor . . . . . . . . . 21 Outdoor Air Temperature (OAT) Sensor . . . . . . . 22 EconoMi$er2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 Field Connections . . . . . . . . . . . . . . . . . . . . . . . . . . 22 Space Temperature (SPT) Sensors . . . . . . . . . . . . 22 Economizer Controls . . . . . . . . . . . . . . . . . . . . . . 23 Indoor Air Quality (CO2) Sensor . . . . . . . . . . . . . 23 Outdoor Air Quality Sensor . . . . . . . . . . . . . . . . . 24 Connecting Discrete Inputs . . . . . . . . . . . . . . . . . . 24 Communication Wiring - Protocols . . . . . . . . . . . . 25 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 Local Access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 RTU-MP Troubleshooting . . . . . . . . . . . . . . . . . . 25 Smoke Detectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 Smoke Detector Locations . . . . . . . . . . . . . . . . . . . . 28 Supply Air . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 Return Air without Economizer . . . . . . . . . . . . . . 28 Return Air with Economizer . . . . . . . . . . . . . . . . . 28 Step 11 - Adjust Factory-Installed Options . . . . . . . . 32 Step 12 - Install Accessories . . . . . . . . . . . . . . . . . . . 33

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Contents Installation Instructions Safety Considerations Unit Dimensional Drawing Size 14 Unit Plan for Unit Location Service Clearance Dimensional DrawingInspect Unit Plan for Sequence of Unit InstallationProvide Unit Support Roof Curb Details Field Fabricate Ductwork For Units with Accessory Electric HeatersRig and Place Unit Install Outside Air Hood Convert to Horizontal and Connect Ductwork when requiredEconomizer Hood Removal and Setup Factory Option Positioning on CurbDamper Assembly Economizer Hood and Two-Position Hood Install External Condensate Trap and LineMake Electrical Connections Field Power SupplyMounting Position for Field Disconnects Over 100A Units with Factory-Installed Disconnect Units Without Factory-Installed DisconnectUnit Powered Convenience Outlet Wiring Factory-Option Thru-Base Connections Field Control WiringThermostat Units without Thru-Base ConnectionsUnit without Thru-Base Connection Kit Heat Anticipator SettingsHeater and Supplementary Fuses Single Point BoxesHeater Low-Voltage Control Connections Return Air Enthalpy Sensor Outdoor Air Enthalpy Control PNO 33CSENTHSWDifferential Enthalpy Control RTU-MP Control System RTU-MP System Control Wiring Diagram RTU-MP Controller Inputs and Outputs Supply Air Temperature SAT SensorSpace Temperature SPT Sensors Outdoor Air Temperature OAT SensorField Connections EconoMi$er2Indoor Air Quality CO2 sensor RTU-MP T-56 Sensor ConnectionsOutdoor Air Quality Sensor PNO 33ZCSENCO2 plus Connecting Discrete InputsWeatherproof enclosure Local Access Communication Wiring ProtocolsRTU-MP Troubleshooting GeneralLEDs on the RTU-MP show the status of certain functions LEDsSystem Smoke DetectorsController SensorSupply Air Smoke Detector LocationsReturn Air with Economizer Return Air Detector Shipping Position Completing Installation of Return Air Smoke SensorNone Unit Wire/Fuse or Hacr Breaker Sizing DataPwrd C.O EconoMi$er IV Occupancy Switch Adjust Factory-Installed OptionsPre-Start and Start-Up Install Accessories548J*14D 548J*14D Catalog No. II548J---07

548J*14D specifications

The Bryant 548J*14D is a highly efficient and versatile air conditioning unit designed to meet the varying demands of residential and light commercial applications. This model stands out due to its advanced engineering, energy-saving features, and reliable performance, making it an ideal choice for homeowners looking to enhance comfort without compromising on energy efficiency.

One of the main features of the Bryant 548J*14D is its excellent SEER (Seasonal Energy Efficiency Ratio) rating, which signifies its ability to provide cooling while consuming less energy. Optimized for efficiency, this unit employs a high-efficiency compressor that adjusts its output based on cooling demands, allowing it to use only the energy necessary to maintain a comfortable environment.

The unit’s all-aluminum evaporator coil ensures durability and resistance to corrosion, contributing to its longer lifespan and consistent performance. Additionally, the Bryant 548J*14D incorporates advanced refrigeration technologies for maximum heat transfer efficiency. This technology not only enhances cooling performance but also improves overall system reliability.

A key characteristic of the Bryant 548J*14D is its Whisper Series technology designed for quiet operation. The low-noise design minimizes sound levels, allowing for unobtrusive cooling in residential spaces while still ensuring effective airflow and cooling capacity. This makes it particularly favorable for installation in bedrooms and other noise-sensitive areas.

Another noteworthy aspect of the Bryant 548J*14D is its compatibility with the MyBryant smartphone app, which enables homeowners to monitor and control their HVAC systems remotely. This connectivity offers convenience and helps to optimize energy usage, as users can adjust settings based on their schedules and preferences.

Furthermore, the Bryant 548J*14D is designed with a robustness that allows it to withstand diverse weather conditions, ensuring reliable performance even in extreme climates. The unit’s compact design eases installation in various settings, whether it's on rooftops, near walls, or on concrete pads.

In summary, the Bryant 548J*14D is a cutting-edge air conditioning unit that combines energy efficiency, quiet operation, and advanced technologies. With its robust construction, smart features, and reliable performance, it stands as a valuable solution for anyone looking to enhance comfort and save on energy costs in their homes or light commercial environments.
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