Bryant 581J Units without Thru-Base Connections, Field Control Wiring, Thermostat

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convenience outlet; access is through the unit’s control box access panel. See Fig. 26.

The primary leads to the convenience outlet transformer are not factory-connected. Selection of primary power source is

acustomer-option. If local codes permit, the transformer primary leads can be connected at the line-side terminals on the unit-mounted non-fused disconnect or HACR breaker switch; this will provide service power to the unit when the unit disconnect switch or HACR switch is open. Other connection methods will result in the convenience outlet circuit being de-energized when the unit disconnect or HACR switch is open. See Fig. 28.

 

 

 

C08283

 

 

 

 

UNIT

CONNECT

PRIMARY

TRANSFORMER

VOLTAGE

AS

CONNECTIONS

TERMINALS

 

 

 

 

208,

240

L1: RED +YEL

H1 + H3

230

L2: BLU + GRA

H2 + H4

 

 

 

 

 

 

 

L1: RED

H1

460

480

Splice BLU + YEL

H2 + H3

 

 

L2: GRA

H4

 

 

 

 

575

600

L1: RED

H1

L2: GRA

H2

 

 

 

 

 

 

Fig. 28 - Powered Convenience Outlet Wiring

Duty Cycle: the unit-powered convenience outlet has a duty cycle limitation. The transformer is intended to provide power on an intermittent basis for service tools, lamps, etc; it is not intended to provide 15-amps loading for continuous duty loads (such as electric heaters for overnight use). Observe a 50% limit on circuit loading above 8-amps (i.e., limit loads exceeding 8-amps to 30 minutes of operation every hour).

Test the GFCI receptacle by pressing the TEST button on the face of the receptacle to trip and open the receptacle. Check for proper grounding wires and power line phasing if the GFCI receptacle does not trip as required. Press the RESET button to clear the tripped condition.

Fuse on power type: The factory fuse is a Bussman “Fusetron” T-15, non-renewable screw-in (Edison base) type plug fuse.

Using unit-mounted convenience outlets: Units with unit-mounded convenience outlet circuits will often require that two disconnects be opened to de-energize all power to the unit. Treat all units as electrically energized until the convenience outlet power is also checked and de-energization is confirmed. Observe National Electrical Code Article 210, Branch Circuits, for use of convenience outlets.

Factory-Option Thru-Base Connections (Electrical Connections) —

This service connection kit consists of a 1/2-in electrical bulkhead connector and a 11/4-in electrical bulkhead connector, all factory-installed in the embossed (raised) section of the unit basepan in the condenser section. The 1/2-in bulkhead connector enables the low-voltage control wires to pass through the basepan. The 11/4-in electrical bulkhead connector allows the high-voltage power wires to pass through the basepan. See Fig. 16.

Check tightness of connector lock nuts before connecting electrical conduits.

Field-supplied and field-installed liquidtight conduit connectors and conduit may be attached to the connectors on the basepan. Pull correctly rated high voltage and low voltage through appropriate conduits. Connect the power conduit to the internal disconnect (if unit is so equipped) or to the external disconnect (through unit side panel). A hole must be field cut in the main control box bottom on the left side so the 24-v control connections can be made. Connect the control power conduit to the unit control box at this hole.

Units without Thru-Base Connections —

1.Install power wiring conduit through side panel open- ings. Install conduit between disconnect and control box.

2.Install power lines to terminal connections as shown in Fig. 24.

Field Control Wiring —

The 581J unit requires an external temperature control device. This device can be a thermostat emulation device provided as part of a third-party Building Management System.

Thermostat —

Install a Bryant-approved accessory 2-stage thermostat according to installation instructions included with the accessory. Locate the thermostat accessory on a solid wall in the conditioned space to sense average temperature in accordance with the thermostat installation instructions.

If the thermostat contains a logic circuit requiring 24-v power, use a thermostat cable or equivalent single leads of different colors with minimum of seven leads. If the thermostat does not require a 24-v source (no “C” connection required), use a thermostat cable or equivalent with minimum of six leads. Check the thermostat installation instructions for additional features which might require additional conductors in the cable.

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Contents Installation Instructions Safety Considerations Unit Dimensional Drawing Sizes Unit Dimensional Drawing Sizes 07-09 Unit Dimensional Drawing Size Unit Dimensional Drawing Size 12 Units LB KG Operating WeightsPlan for Unit Location Roof MountInspect Unit Plan for Sequence of Unit InstallationProvide Unit Support Roof Curb Details Sizes Roof Curb Details Size Field Fabricate Ductwork MAX Weight Dimensions UnitRig and Place Unit Positioning on Curb Ductwork when requiredInstall Outside Air Hood Convert to Horizontal and ConnectInstall Gas Piping Install Flue HoodEconomizer Hood and Two-Position Hood Natural Gas Supply Line Pressure Ranges Steel Pipe Spacing of Supports Nominal Diameter DimensionUnit Model Unit Size MIN MAX Gas Line Piping Condensate Drain Pan Side View Install External Condensate Trap and LineAll Units Field Power SupplyUnits Without Factory-Installed Disconnect Make Electrical ConnectionsConvenience Outlet Location Weatherproof Cover InstallationUnit Connect Primary Transformer Field Control WiringUnits without Thru-Base Connections ThermostatField Control Wiring Raceway Heat Anticipator Settings To connect the Edge Programmable Thermidistat T6-PRH01-A Perfect Humidityt Control ConnectionsPerfect Humidity Space RH Controller To connect a field-supplied humidistatOAT RRS RTU Open Multi-Protocol Control Board RTU Open Control SystemRTU Open System Control Wiring Diagram C11070 RTU Open Controller Inputs and Outputs Supply Air Temperature SAT SensorField Connections Space Temperature SPT SensorsEconoMi$er2 IAQ Sensor SEN J4-2 COM J4-3 24 VAC Relative Humidity Sensors Space or Duct Mounted Space Relative Humidity Sensor Typical WiringConnecting Discrete Inputs Duct Relative Humidity Sensor Typical WiringBaud Rate DS2 DS1 Communication Wiring ProtocolsGeneral Protocol DS8 DS7 DS6 DS5 DS4 DS3 DS2 DS1RTU Open Troubleshooting Local AccessDifferential Enthalpy Control Outdoor Air Enthalpy Control PNO 33CSENTHSWLEDs LEDs on the RTU Open show the status of certain functionsSystem WiringSmoke Detectors Return Air Enthalpy SensorSmoke Detector Locations See Completing Installation of Return Air SmokeSupply Air Return Air Detector Shipping Position Unit Wire/Fuse or Hacr Breaker Sizing Data Hacr FLA LRA Brkr Unit NOM IFM Combustion Power No P.EUnbalanced 3-Phase Supply Voltage Smoke Detectors Adjust Factory-Installed OptionsInstall Accessories EconoMi$er IV Occupancy Switch
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581J specifications

The Bryant 581J is a high-efficiency gas furnace that exemplifies advanced heating technology and innovative design. Known for its reliability and comfort, the Bryant 581J offers impressive performance features that cater to both residential and commercial heating needs. One of its standout characteristics is the two-stage heating system, which allows the furnace to operate at a lower stage when the heating demand is modest, providing improved comfort and energy efficiency. This feature also minimizes temperature fluctuations, ensuring a more consistent and comfortable indoor environment.

Energy efficiency is a critical aspect of the Bryant 581J. With an annual fuel utilization efficiency (AFUE) rating of up to 96%, this furnace is designed to convert a high percentage of fuel into usable heat, which helps homeowners save on energy bills. The high-efficiency design also contributes to a reduced carbon footprint, aligning with modern environmental concerns.

The Bryant 581J is equipped with technologically advanced features, including the ComfortTech™ control system. This system enables enhanced temperature regulation and integrates easily with smart home systems, allowing homeowners the convenience of remote control through smartphones and tablets. Additionally, the furnace includes an electronically commutated motor (ECM) blower, which optimizes airflow and reduces energy consumption while enhancing the overall comfort level within the space.

Noise reduction is another key characteristic of the Bryant 581J. The furnace is engineered with sound-dampening technology, resulting in quieter operation compared to conventional furnaces. This attention to noise management makes it an appealing choice for residential applications, where peace and tranquility are crucial.

The durable construction of the Bryant 581J ensures longevity and reliability. With a robust cabinet and quality materials, it is built to withstand the rigors of daily operation. Furthermore, the furnace comes with a warranty that provides peace of mind, protecting the investment over the years.

Overall, the Bryant 581J represents a blend of efficiency, advanced technology, and reliable performance. With its high AFUE rating, innovative features, and quiet operation, it stands out in the market as a top choice for anyone seeking a dependable heating solution. Whether for new installations or replacements, the Bryant 581J is designed to meet the heating demands of today's energy-conscious homeowners.
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