2.The box with the economizer hood components is shipped in the compartment behind the economizer. The EconoMi$er IV controller is mounted on top of the EconoMi$er IV in the position shown in Fig. 19. To remove the component box from its shipping posi- tion, remove the screw holding the hood box bracket to the top of the economizer. Slide the hood box out of the unit. See Fig. 21.

IMPORTANT: If the power exhaust accessory is to be installed on the unit, the hood shipped with the unit will not be used and must be discarded. Save the aluminum filter for use in the power exhaust hood assembly.

3.The indoor coil access panel will be used as the top of the hood. Remove the screws along the sides and bot- tom of the indoor coil access panel. See Fig. 22.

4.Swing out indoor coil access panel and insert the hood sides under the panel (hood top). Use the screws provided to attach the hood sides to the hood top. Use screws provided to attach the hood sides to the unit. See Fig. 23.

5.Remove the shipping tape holding the economizer barometric relief damper in place.

6.Insert the hood divider between the hood sides. See Fig. 23 and 24. Secure hood divider with 2 screws on each hood side. The hood divider is also used as the bottom filter rack for the aluminum filter.

7.Open the filter clips which are located underneath the hood top. Insert the aluminum filter into the bot- tom filter rack (hood divider). Push the filter into

position past the open filter clips. Close the filter clips to lock the filter into place. See Fig. 24.

8.Caulk the ends of the joint between the unit top panel and the hood top. See Fig. 22.

9.Replace the filter access panel.

10.Install all EconoMi$er IV accessories. EconoMi$er IV wiring is shown in Fig. 25.

Barometric flow capacity is shown in Fig. 26. Outdoor air leakage is shown in Fig. 27. Return air pressure drop is shown in Fig. 28.

F. EconoMi$er IV Standard Sensors

Outdoor Air Temperature (OAT) Sensor

The outdoor air temperature sensor (HH57AC074) is a 10 to 20 mA device used to measure the outdoor-air temperature. The outdoor-air temperature is used to determine when the EconoMi$er IV can be used for free cooling. The sensor is factory-installed on the EconoMi$er IV in the outdoor air- stream. See Fig. 19. The operating range of temperature measurement is 40 to 100 F.

Supply Air Temperature (SAT) Sensor

The supply air temperature sensor is a 3 K thermistor located at the inlet of the indoor fan. See Fig. 29. This sensor is factory installed. The operating range of temperature measurement is 0° to 158 F. See Table 5 for sensor tempera- ture/resistance values.

ECONOMI$ER IV

CONTROLLER

WIRING

OUTSIDE AIR

TEMPERATURE SENSOR

HARNESS

 

LOW AMBIENT SENSOR

ACTUATOR

 

 

 

x

 

 

 

o

 

o

B

 

HOOD BOX

H

od

 

 

 

 

 

BRACKET

 

 

 

 

Fig. 21 — Hood Box Removal

Fig. 19 — EconoMi$er IV Component Locations

FILTER ACCESS PANEL

SIDE

PANEL

 

 

TOP

 

 

SIDE

 

 

PANEL

 

 

CAULK

 

 

HERE

 

INDOOR

INDOOR

 

COIL

COIL

 

ACCESS

ACCESS

INDOOR COIL ACCESS PANEL

PANEL

PANEL

 

 

Fig. 20 — Typical Access Panel Locations

Fig. 22 — Indoor Coil Access Panel Relocation

—14—

Page 13 Page 15
Page 14
Image 14
Bryant 551B installation instructions EconoMi$er IV Standard Sensors, Hood Box Removal
Page 13 Page 15

551B specifications

The Bryant 551B and 551C are two highly efficient air conditioning units designed to provide optimal comfort in residential settings. Known for their reliability and performance, these models are part of Bryant's esteemed line of heating and cooling solutions.

One of the standout features of the Bryant 551B is its two-stage cooling system, which allows for better humidity control and increased comfort. This ensures that homeowners can enjoy consistent temperatures while reducing energy consumption. The unit operates quietly, thanks to its noise-reducing technology, making it an ideal choice for bedrooms and living spaces.

On the other hand, the Bryant 551C builds upon this foundation with its variable-speed compressor. This technology allows the unit to adjust its cooling output according to the specific needs of the home. This results in seamless operation and even greater energy efficiency. Both models also incorporate Bryant's advanced control capabilities, which allow users to monitor and adjust settings remotely via smart devices, adding a layer of convenience and modernity to home climate control.

With an emphasis on durability, both the 551B and 551C feature a galvanized steel cabinet that protects against weather-related damage. The powder coat finish further enhances their resistance to rust and corrosion, ensuring a long lifespan and minimal maintenance.

Another significant characteristic of these units is their excellent Seasonal Energy Efficiency Ratio (SEER) ratings. The 551B boasts a SEER rating of up to 16, while the 551C takes it even further with ratings exceeding 20. This efficiency not only translates to lower energy bills for homeowners but also contributes to a reduced carbon footprint, making these units environmentally friendly options.

Both models are also designed to operate with eco-friendly refrigerants, aligning with modern energy standards and regulations aimed at reducing greenhouse gas emissions.

In summary, the Bryant 551B and 551C are exemplary choices for homeowners looking for reliable, efficient, and high-performing air conditioning solutions. With features such as two-stage and variable-speed compressors, advanced smart technology, and robust construction, these models stand out in the competitive HVAC market. They promise a comfortable indoor environment along with significant energy savings, making them a wise investment for the future.
Top Page Image Contents