Bryant 551B EconoMi$er IV Control Modes Outdoor Dry Bulb Changeover, EconoMi$er IV Sensor Usage

Page 26

551B,C

EconoMi$er IV Control Modes

 

 

 

 

 

 

Outdoor Dry Bulb Changeover

Determine the EconoMi$er IV control mode before set up of the

The standard controller is shipped from the factory configured for

control. Some modes of operation may require different

outdoor dry bulb changeover control. The outdoor-air and

sensors. (See Table 6.) The EconoMi$er IV is supplied from the

supply-air temperature sensors are included as standard. For this

factory with a supply-air temperature sensor and an outdoor- air

control mode, the outdoor temperature is compared to an

temperature sensor. This allows for operation of the EconoMi$er

adjustable set point selected on the control. If the outdoor-air

IV with outdoor air dry bulb changeover control. Additional

temperature is above the set point, the EconoMi$er IV will adjust

accessories can be added to allow for different types of

the outdoor-air dampers to minimum position. If the outdoor air

changeover control and operation of the EconoMi$er IV and unit.

temperature is below the set point, the position of the outdoor air

 

 

 

 

 

 

 

 

 

dampers will be controlled to provide free cooling using outdoor

Table 6—EconoMi$er IV Sensor Usage

air. When in this mode, the LED next to the free cooling set point

 

 

 

 

 

 

 

 

 

potentiometer will be on. The changeover temperature set point is

 

 

 

 

 

 

 

 

 

controlled by the free cooling set point potentiometer located on

 

ECONOMI$ER IV WITH OUTDOOR AIR

 

 

 

 

the control. (See Fig. 33.) The scale on the potentiometer is A, B,

APPLICATION

 

DRY BULB SENSOR

 

 

 

Accessories Required

 

 

C, and D. See Fig. 34 for the corresponding temperature

Outdoor Air

None. The outdoor air dry bulb sensor

 

 

changeover values.

Dry Bulb

 

is factory installed.

 

Differential Dry Bulb Control

Differential

 

CRTEMPSN002A00*

 

 

 

 

 

 

Dry Bulb

 

 

For differential dry bulb control the standard outdoor dry bulb

 

 

 

 

 

 

 

 

Single Enthalpy

 

 

HH57AC078

 

 

sensor is used in conjunction with an additional accessory dry

 

 

 

HH57AC078

 

 

Differential

 

 

 

bulb sensor (part number CRTEMPSN002A00). The accessory

 

 

 

 

and

 

 

Enthalpy

 

 

 

 

 

sensor must be mounted in the return airstream. (See Fig. 35.)

 

CRENTDIF004A00*

 

 

 

 

 

Wiring is provided in the EconoMi$er IV wiring harness. (See

CO2 for DCV

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Fig. 27.)

Control using a

 

33ZCSENCO2

 

 

Wall-Mounted

 

 

In this mode of operation, the outdoor-air temperature is

 

 

 

 

 

 

 

 

CO2 Sensor

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

compared to the return-air temperature and the lower temperature

CO2 for DCV

33ZCSENCO2†

 

O

 

 

 

 

Control using a

and

 

 

 

CRCBDIOX005A00††

 

 

airstream is used for cooling. When using this mode of

 

 

 

 

 

Duct-Mounted

33ZCASPCO2**

 

R

 

 

 

 

changeover control, turn the enthalpy setpoint potentiometer fully

CO2 Sensor

 

 

 

 

 

 

 

 

 

 

 

clockwise to the D setting. (See Fig. 33.)

 

 

 

 

 

 

 

 

 

*CRENTDIF004A00 and CRTEMPSN002A00 accessories are used on many different base units. As such, these kits may contain parts that will not be needed for installation.

2sensor.

**33ZCASPCO2 is an accessory aspirator box required for duct-mounted applications.† 33ZCSENCO2 is an accessory CO

††CRCBDIOX005A00 is an accessory that contains both 33ZCSENCO2 and 33ZCASPCO2 accessories.

FOR OCCUPANCY CONTROL

REPLACE JUMPER WITH

FIELD-SUPPLIED TIME CLOCK

8

7

LEGEND

Potentiometer Defaults Settings:

DCV— Demand Controlled Ventilation

Power Exhaust

Middle

Minimum Pos.

Fully Closed

IAQ — Indoor Air Quality

DCV Max.

Middle

LA — Low Ambient Lockout Device

DCV Set

Middle

OAT — Outdoor-Air Temperature

Enthalpy

C Setting

POT — Potentiometer

 

 

RAT — Return-Air Temperature

NOTES:

1.620 ohm, 1 watt 5% resistor should be removed only when using differential enthalpy or dry bulb.

2.If a separate field-supplied 24 v transformer is used for the IAQ sensor power supply, it cannot have the secondary of the transformer grounded.

3.For field-installed remote minimum position POT, remove black wire jumper between P and P1 and set control minimum position POT to the minimum position.

C06028

Fig. 27 ---EconoMi$er IV Wiring

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Contents Installation Instructions Field Fabricate Ductwork Install External Trap for Condensate DrainProvide Unit Support Rig and Place UnitRoof Curb Details Unit Leveling Tolerances 551B Unit Operating Dimensions Weight551C 551B 036-072 Base Unit Dimensions 551C 024-060 Base Unit Dimensions Heat Anticipator Settings Field Power SupplyField Control Wiring Make Electrical ConnectionsPhysical Data 551B Base Unit 551BPhysical Data 551C Base Unit 551CPower Wiring Connections Electrical Data-551C FLA MCA LRA Type OutletPerf ect Voltage FLA Crheater 008,009 23.4 30.1 40.8 Electrical Data-551B FLA MCA LRA414 508 Ton 004+005 19.9 24.3 55.2 76.3 86.9 168 34.9 173 002 13.6 A00 or Adjust Factory-Installed Options Typical Perfect Humidity t Adaptive Dehumidification System EconoMi$er IV Component Locations Optional EconoMi$er Outdoor-Air Damper Position SettingOutdoor-Air Damper With Hood Attached Temperature F Supply Air Temperature SAT SensorSupply Air Sensor Temperature Resistance Values Outdoor Air Lockout SensorDifferential Dry Bulb Control EconoMi$er IV Control Modes Outdoor Dry Bulb ChangeoverEconoMi$er IV Sensor Usage Outdoor Enthalpy Changeover Differential Enthalphy ControlMinimum Position Control Exhaust Set Point AdjustmentIndoor Air Quality IAQ Sensor Input Damper MovementOutside Air Temperature Changeover Set Points Return Air Temperature or Enthalpy Sensor Mounting LocationCO2 Sensor Configuration EconoMi$er IV ControlDehumidification of Fresh Air with DCV Control Adjust Evaporator-Fan SpeedCO2Sensor Standard Settings Belt Drive MotorsUnit Motor Pulley Turns Open Evaporator-Fan Motor Data Standard Motor Evaporator-Fan Motor Data High-Static Motors024, 036 060 74/84 072 Evaporator-Fan Motor EfficiencyMotor 551B Efficiency Airflow957 522 1000 598 173 718 267 Rpm Bhp Watts 900 566 142 690 228879 9031400 737 355 842 481 932 610 Rpm Bhp Watts 1200 666 252 778 361 873 476 956 5941300 701 809 418 902 540 983 665 875 551 962 6891700 866 478 966 608 Rpm Bhp Watts 1500 790 353 897 471 991 6001600 828 412 931 536 1022 670 1800 905 551 1001 6871495 1858 1700 1462 20671472 1761 1600 1463 1766 1520 1964 18002400 1145 1174 1223 1346 1296 1526 2200 1063 929 1147 1089 1224 1256 1295 14312300 1104 1046 1185 1212 1260 1386 2500 1185 1311 1262 14902000 984 727 1078 892 Rpm Bhp Watts 1800 907 558 1006 708 1092 8601900 945 638 1042 796 2100 1024 823 1115 9972300 1103 1044 1189 1234 1266 1425 2100 1024 823 1115 997 1195 1173 1268 13502200 1063 929 1152 1111 1230 1294 2400 1143 1168 1227 13671100 612 195 735 Rpm Bhp Watts 900 554 134 6811000 583 163 707 9191400 706 324 Rpm Bhp Watts 1200 643 233 762 3441300 674 276 1500 738 379719 Rpm Bhp Watts 1500 724 295 837 402 937 524 1028 6601600 757 343 866 455 962 580 1700 790 398 894 514 988 6431508 1957 1900 1474 1797 17001490 1873 1800 1467 1839 1527 2050 2000Rpm Bhp Watts 1500 1188 970 1261 1143 2400 1033 970 1115 1120 1192 1279 1264 14482500 1069 1084 1149 1239 1223 1403 1293 1576 1600 1208 1033 12792600 1097 1169 1181 1356 1257 1546 2400 1026 945 1115 1118 1195 1295 1268 14762500 1061 1053 1148 1233 1226 1416 1297 1604 2700 1132 1294 1214 1487 1289 1684Unit Preparation Internal WiringRefrigerant Service Ports Return-Air FiltersHeating Safety ReliefCooling Ventilation Continuous FanCleaning Evaporator CoilLubrication Refrigerant Charge Condenser-Fan AdjustmentEconoMi$er IV Adjustment No ChargeCooling Charging Chart Standard 551B Replacement Parts 551C 3 TON Charging Chart 551C 5 TON Charging Chart Unit Troubleshooting Economi$er IV TroubleshootingProblem Cause Remedy EconoMi$er IV Troubleshooting CompletionCooling Service Analysis EconoMi$er IV Input/Output Logic Inputs OutputsEconoMi$er IV Functional View Preliminary Information Catalog No. II551B---C---36---1
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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.
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