Manuals / Bryant / Household Appliance / Air Conditioner

Bryant 551C 551B,C, Hood Box Removal, Indoor Coil Access Panel Relocation, Resistance Values

Models: 551B

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Fig. 23 ---Hood Box Removal

			x
		o
o		B		HOOD BOX
H	od			HOOD BOX
H				BRACKET
				BRACKET

C06024

Fig. 23 ---Hood Box Removal

SIDE

PANEL

			TOP
			SIDE
		CAULK	PANEL
		CAULK
		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”
							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

Image 25

Bryant 551C 551B,C, Hood Box Removal, Indoor Coil Access Panel Relocation, Outdoor-AirHood Construction, Resistance Values

Contents

SAFETY CONSIDERATIONS TABLE OF CONTENTSINSTALLATION Installation InstructionsStep 1 -ProvideUnit Support Step 3 -InstallExternal Trap for Condensate DrainStep 2 -FieldFabricate Ductwork Step 4 -Rigand Place UnitFig. 2 --- Roof Curb Details 551B,C551B 551CMAXIMUM ALLOWABLE DIFFERENCE in 551B,CFig. 3 --- Unit Leveling Tolerances Fig. 4 --- Condensate Drain ConnectionFig. 7 --- Roof Curb Alignment 551B,C551B,C 551B 036-072Base Unit DimensionsC06375 XOB LOR TNO CACCESS Fig. 9 --- 551C 024-060Base Unit Dimensions551B,C COMPRESSORField Power Supply Step 5 -MakeElectrical ConnectionsField Control Wiring Heat Anticipator SettingsTable 1-PhysicalData 551B 551B,CTable 2-PhysicalData 551C 551B,CFig. 12 --- Field Control Wiring Raceway Fig. 11 --- Power Wiring Connections551B,C Indoor Evaporator Fan ContactorTable 3-Electrical Data-551C 551B,CTable 3 - Electrical Data-551Ccont 551B,CTable 3 - Electrical Data-551Ccont 551B,CVOLTAGE Table 3 - Electrical Data-551Ccont 551B,CVOLTAGE Table 3 - Electrical Data-551Ccont 551B,CNONE Table 4-Electrical Data-551B 551B,CTable 4 - Electrical Data-551Bcont 551B,CTable 4 - Electrical Data-551Bcont 551B,CUNIT Table 4 - Electrical Data-551Bcont 551B,CUNIT Table 4 - Electrical Data-551Bcont 551B,CVOLTAGE Fig. 13 --- Accessory Field-InstalledHumidistat Step 6 -Adjust Factory-InstalledOptionsDisconnect Switch AssemblyDamper Installed Humidistat Wiring 208/230-VUnit ShownLTLO - Low Temperature Lockout Factory WiringFig. 22 --- Typical Access Panel Locations Outdoor-AirDamper Position Setting551B,C Fig. FigOutdoor Air Temperature OAT Sensor Fig. 24 --- Indoor Coil Access Panel RelocationSupply Air Temperature SAT Sensor Table 5-SupplyAir Sensor Temperature551B,C Fig. 27 --- EconoMi$er IV WiringEconoMi$er IV Control Modes Outdoor Dry Bulb ChangeoverOutdoor Enthalpy Changeover 551B,CDifferential Enthalphy Control Fig. 28 --- Barometric Flow Capacity551B,C Exhaust Set Point Adjustmentand LED Locations Indoor Air Quality IAQ Sensor InputFig. 35 --- Return Air Temperature or Enthalpy Fig. 34 --- Outside Air Temperature551B,C Changeover Set PointsFig. 38 --- CO2 Sensor Maximum Range Setting CO2 Sensor Configuration551B,C Fig. 37 --- EconoMi$er IV ControlTable 7-CO2 Sensor Standard Settings Step 7 -Adjust Evaporator-FanSpeed551B,C Dehumidification of Fresh Air with DCV Control551B,C Fig. 41 --- Evaporator-FanPulley AdjustmentUNIT 551B,C551B,C GENERAL FAN PERFORMANCE NOTESTable 14 - Evaporator-FanMotor Efficiency Belt Drive Belt DriveBelt Drive 551B,CBelt Drive AIRFLOW 551B,CAIRFLOW 551B,CBelt Drive 551B,CAIRFLOW 551B,CAIRFLOW 551B,CBelt Drive 551B,CBelt Drive 551B,CStandard Motor Belt Drive 551B,CStandard Motor Belt Drive 551B,CHigh-StaticMotor Belt Drive 551B,CAIRFLOW 551B,CRefrigerant Service Ports Internal WiringPRE-START-UP START-UPCooling Safety ReliefHeating Ventilation Continuous FanStep 1 -Cleaning SERVICE551B,C Fig. 42 --- Perfect Humidityt NormalFig. 45 --- Cleaning Condenser Coil Step 2 -LubricationEvaporator Fan Belt Adjustment 551B,CStep 4 -EconoMi$erIV Adjustment Step 3 -Condenser-FanAdjustmentStep 5 -RefrigerantCharge Fig. 48 --- Condenser-FanAdjustmentFig. 53 --- Cooling Charging Chart, 551B 036 with Fig. 51 --- Cooling Charging Chart Standard 551BFig. 50 --- Cooling Charging Chart Fig. 52 --- Cooling Charging ChartFig. 54 --- Cooling Charging Chart, 551B 048 with Step 6 -ReplacementPartsFig. 55 --- Cooling Charging Chart, 551B 048 with Fig. 56 --- Cooling Charging Chart, 551B 072 with551C - 3 TON CHARGING CHART Fig. 57 --- Cooling Charging Chart Standard 551CFig. 58 --- Cooling Charging Chart Standard 551C 551C - 2 TON CHARGING CHART551C - 4 TON CHARGING CHART 551C - 5 TON CHARGING CHARTFig. 59 --- Cooling Charging Chart Standard 551C Fig. 60 --- Cooling Charging Chart Standard 551CUnit Troubleshooting TROUBLESHOOTINGEconomi$er IV Troubleshooting 551B,CTable 35-CoolingService Analysis EconoMi$er IV Troubleshooting Completion551B,C Table 38-EconoMi$erIV Input/Output Logic 551B,CFig. 61 --- EconoMi$er IV Functional View 551B,CC06053 START-UPCHECKLIST Remove and Store in Job File GENERALI. PRELIMINARY INFORMATION III. START-UP