Table 4 – LEDs

 

The LEDs on the RTU Open show the status of certain functions

 

 

 

If this LED is on...

 

Status is...

 

 

 

Power

 

RTU Open has power

 

 

 

Rx

 

RTU Open is receiving data from the network segment

 

 

 

Tx

 

RTU Open is transmitting data over the network segment

 

 

 

DO#

 

The digital output is active

 

The Run and Error LEDs indicate control module and network status

If Run LED shows...

And Error LED shows...

2 flashes per second

Off

 

 

2 flashes per second

2 flashes,

alternating with Run LED

 

2 flashes per second

3 flashes,

then off

 

2 flashes per second

4 flashes,

then pause

 

 

 

2 flashes per second

On

 

 

5 flashes per second

On

 

 

5 flashes per second

Off

 

 

7 flashes per second

7 flashes per second, alternating with

Run LED

 

 

 

14 flashes per second

14 flashes per second,

alternating with Run LED

 

On

On

 

 

Status is...

Normal

Five minute auto---restart delay after system error

Control module has just been formatted

Two or more devices on this network have the same ARC156 network address

Exec halted after frequent system errors or control programs halted

Exec start---up aborted, Boot is running Firmware transfer in progress, Boot is running

Ten second recovery period after brownout

Brownout

Failure. Try the following solutions:

STurn RTU Open off, then on. S Format RTU Open.

S Download memory to RTU Open. S Replace RTU Open.

581J

NOTE: Refer to Catalog No. TS-5580J-01 for complete configuration of RTU Open operating sequences. Contact your Bryant applications engineer for details on configuration and troubleshooting of connected networks.

Outdoor Air Enthalpy Control (PNO 33CSENTHSW)

Enthalpy

 

Switch

 

24V

RED

GND

BLK

LOW

GRA

PL6-1 (24-V)

PL6-4 (COM)

7CTB ECON

(RTU Open: to J2-6)

The enthalpy control (33CSENTHSW) is available as a field-installed accessory to be used with the EconoMi$er2 damper system. The outdoor air enthalpy sensor is part of the enthalpy control. (The separate field-installed accessory return air enthalpy sensor (33CSENTSEN) is required for differential enthalpy control. See Fig. 53.)

Locate the enthalpy control in the economizer next to the Actuator Motor. Locate two GRA leads in the factory harness and connect the gray lead labeled “ESL” to the terminal labeled “LOW”. See Fig. 53. Connect the enthalpy control power input terminals to economizer actuator power leads RED (connect to 24V) and BLK (connect to GND).

Factory Wiring Harness

C11169

Fig. 53 - Enthalpy Switch (33CSENTHSW) Connections

The outdoor enthalpy changeover setpoint is set at the enthalpy controller.

Differential Enthalpy Control —

Differential enthalpy control is provided by sensing and comparing the outside air and return air enthalpy conditions. Install the outdoor air enthalpy control as described above. Add and install a return air enthalpy sensor.

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Bryant 581J Outdoor Air Enthalpy Control PNO 33CSENTHSW, LEDs on the RTU Open show the status of certain functions

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.