x

 

 

 

o

 

o

B

 

HOOD BOX

H

od

 

 

 

 

 

BRACKET

 

 

 

 

C06024

Fig. 23 ---Hood Box Removal

SIDE

PANEL

 

 

 

TOP

 

 

 

SIDE

 

 

CAULK

PANEL

 

 

 

 

 

HERE

 

 

INDOOR

 

INDOOR

 

COIL

 

COIL

 

ACCESS

 

ACCESS

 

PANEL

 

PANEL

 

 

 

C06025

Fig. 24 ---Indoor Coil Access Panel Relocation

 

 

 

TOP

 

 

 

PANEL

 

 

 

INDOOR COIL

 

 

 

ACCESS PANEL

LEFT

 

 

 

HOOD

SCREW

 

SIDE

B

 

 

 

19 1/16”

 

 

 

 

 

33 3/8”

 

HOOD DIVIDER

 

 

 

 

C06026

 

Fig. 25 ---Outdoor-Air Hood Construction

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 airstream.

(See Fig. 21.) The operating range of temperature measurement is 40_ to 100_F.

Supply Air Temperature (SAT) Sensor

The supply air temperature sensor is a 3k ohm thermistor located at the inlet of the indoor fan. (See Fig. 32.) This sensor is factory installed. The operating range of temperature measurement is 0° to 158_F. See Table 5 for sensor temperature/resistance values.

Table 5—Supply Air Sensor Temperature/

Resistance Values

TEMPERATURE (F)

 

RESISTANCE (ohms)

 

–58

 

200,250

 

 

–40

 

100,680

 

 

–22

 

53,010

 

 

 

–4

 

29,091

 

14

 

 

16,590

 

32

 

 

9,795

 

 

50

 

 

5,970

 

 

68

 

 

3,747

 

 

77

 

 

3,000

 

 

86

 

 

2,416

 

 

104

 

 

1,597

 

 

122

 

 

1,080

 

 

140

 

 

746

 

 

158

 

 

525

 

 

176

 

 

376

 

 

185

 

 

321

 

 

194

 

 

274

 

 

212

 

 

203

 

 

230

 

 

153

 

 

248

 

 

116

 

 

257

 

 

102

 

 

266

 

 

89

 

 

284

 

 

70

 

 

302

 

 

55

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

17 1/4”

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

DIVIDER

OUTSIDE

AIR

HOOD

CLEANABLE ALUMINUM FILTER

FILTER

BAROMETRIC RELIEF

FILTER CLIP

C06027

Fig. 26 ---Filter Installation

The temperature sensor looks like an eyelet terminal with wires running to it. The sensor is located in the “crimp end” and is sealed from moisture.

Outdoor Air Lockout Sensor

The EconoMi$er IV is equipped with an ambient temperature lockout switch located in the outdoor air stream which is used to lockout the compressors below a 42_F ambient temperature. (See Fig. 21.)

551B,C

25

Page 25
Image 25
Bryant 551C Supply Air Temperature SAT Sensor, Supply Air Sensor Temperature Resistance Values, Outdoor Air Lockout Sensor

551C, 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.