ECONOMIZER

CONTROL

BOARD

BAROMETRIC

RELIEF

DAMPER

ECONOMIZER

PLUG

ECONOMIZER

MOTOR

Fig. 19 Ð Horizontal Varislide™ Economizer Installation

(90 Degree Rotation)

BLOCK-OFF PLATE

Fig. 20 Ð Horizontal Discharge Block-Off Plate

WIRING

HARNESS

Fig. 21 Ð Typical Varislide Economizer and Wiring Harness

EXAMPLE:

Given:

Negative Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.2 in. wg Outdoor Air . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 900 cfm

Determine Ð Settin g Ð 5 in.

Fig. 22 Ð Varislide Economizer Minimum Position Setting

8.Remove tape from outdoor-air thermostat (OAT). Fas- ten OAT to inside of hood using screws and speed clips provided. See Fig. 23. Make sure OAT terminals are positioned up.

9.Replace outdoor-air opening panel using screws from Step 2. Replace ®lter access panel. Ensure the ®lter access panel slides along the tracks and is securely engaged.

10.Fasten hood top and side plate assembly (Fig. 17) to outdoor-air opening panel with screws provided.

11.Place knob supplied with economizer on OAT. See Fig. 23. Set for 3° F below indoor room thermostat set- ting. If accessory enthalpy control (EC) is used in place of OAT, see instructions shipped with EC for installa- tion and adjustment. See Fig. 23.

12.Connect OAT per Fig. 24.

13.Slide outdoor-air inlet screen into screen track on hood side plate. While holding screen in place, fasten screen retainer to hood using screws provided.

NOTE: Refer to Fig. 25 for economizer barometric relief damper characteristics.

H. Optional PARABLADE Economizer

The optional PARABLADE economizer hood assembly is pack- aged and shipped in the ®lter section. Damper blades and control boards are installed at the factory and the econo- mizer is shipped in the vertical discharge position.

NOTE: Horizontal discharge block-off plate is shipped with the air hood package. The PARABLADE economizer can only be used for vertical discharge applications. Discard this plate.

Assembly

1.Determine if ventilation air is required in building. If so, determine the minimum amount to be supplied by each unit and record quantity of ventilation air needed for use in Step 6.

2.Remove ®lter access panel by raising panel and swing- ing panel outward. Panel is now disengaged from track and can be removed. No tools are required to remove ®lter access panel. Remove outdoor-air opening panel.

Ð14Ð

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Bryant 581B installation instructions Optional Parablade Economizer, Example
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581B specifications

The Bryant 581B is an innovative and highly efficient gas furnace that stands out in the HVAC market for its remarkable performance, reliability, and advanced features. Designed to provide optimal heating comfort, the Bryant 581B is perfect for homeowners seeking both quality and energy efficiency.

One of the main features of the Bryant 581B is its impressive Annual Fuel Utilization Efficiency (AFUE) rating. With an AFUE rating of up to 80%, this gas furnace maximizes energy usage, ensuring that a significant portion of the fuel is converted into heat for your home. This efficiency not only translates into lower energy bills but also reduces the carbon footprint, making it an environmentally friendly choice.

The furnace is equipped with a multi-speed blower motor that enhances comfort by providing consistent airflow throughout the home. This technology adjusts to different heating demands, ensuring that every room reaches the desired temperature without the discomfort of hot or cold spots. The quiet operation of the blower motor also adds to the overall comfort, creating a peaceful home environment.

Another notable characteristic of the Bryant 581B is its durable construction. It features a robust heat exchanger built from high-quality materials, designed to withstand the rigors of daily use. The compact design of the furnace allows it to fit seamlessly into various spaces, making it an ideal choice for both new installations and replacement projects.

The Bryant 581B also comes with advanced safety features, including a self-diagnostic control board that monitors the system's performance. This feature allows for easy troubleshooting and maintenance, prolonging the life of the furnace. Additionally, the furnace is equipped with an induced draft blower that enhances venting efficiency and safety by ensuring that combustion gases are safely expelled from the home.

For homeowners looking for enhanced control, the Bryant 581B is compatible with a range of smart thermostats, providing the ability to monitor and adjust heating settings remotely. This integration with smart technology ensures that homeowners can maintain their desired comfort levels while maximizing efficiency.

In conclusion, the Bryant 581B gas furnace is a top-tier option that combines efficiency, durability, and modern technology. With its high AFUE rating, multi-speed blower, and advanced safety features, it promises to deliver unparalleled comfort and peace of mind for years to come. Whether for a new build or an upgrade, the Bryant 581B is an investment that pays off in both comfort and savings.
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