Bryant 580F operation manual Enthalpy Changeover Set Points

Page 21

for cooling. For example, when the outdoor air has a lower enthalpy than the return air and is below the set point, the EconoMi$erIV opens to bring in outdoor air for free cooling.

Replace the standard outside air dry bulb temperature sen- sor with the accessory enthalpy sensor in the same mounting location. See Fig. 25. Mount the return air enthalpy sensor in the return airstream. See Fig. 30. The outdoor enthalpy changeover set point is set with the outdoor enthalpy set point potentiometer on the EconoMi$erIV controller. When using this mode of changeover control, turn the enthalpy set point potentiometer fully clockwise to the D setting.

NOTE: Remove 620-ohm resistor if differential enthalpy sen- sor is installed.

Indoor Air Quality (IAQ) Sensor Input

The IAQ input can be used for demand control ventilation control based on the level of CO2 measured in the space or return air duct.

Mount the accessory IAQ sensor according to manufacturer specifications. The IAQ sensor should be wired to the AQ and AQ1 terminals of the controller. Adjust the DCV potentiome- ters to correspond to the DCV voltage output of the indoor air quality sensor at the user-determined set point. See Fig. 33.

If a separate field-supplied transformer is used to power the IAQ sensor, the sensor must not be grounded or the EconoMi$erIV control board will be damaged.

Exhaust Set Point Adjustment

The exhaust set point will determine when the exhaust fan runs based on damper position (if accessory power exhaust is

installed). The set point is modified with the Exhaust Fan Set Point (EXH SET) potentiometer. See Fig. 28. The set point represents the damper position above which the exhaust fan will be turned on. When there is a call for exhaust, the EconoMi$erIV controller provides a 45 ± 15 sec- ond delay before exhaust fan activation to allow the dampers to open. This delay allows the damper to reach the appropri- ate position to avoid unnecessary fan overload.

Minimum Position Control

There is a minimum damper position potentiometer on the EconoMi$erIV controller. See Fig. 28. The minimum damper position maintains the minimum airflow into the building during the occupied period.

When using demand ventilation, the minimum damper posi- tion represents the minimum ventilation position for VOC (volatile organic compound) ventilation requirements. The maximum demand ventilation position is used for fully occu- pied ventilation.

When demand ventilation control is not being used, the min- imum position potentiometer should be used to set the occu- pied ventilation position. The maximum demand ventilation position should be turned fully clockwise.

Adjust the minimum position potentiometer to allow the minimum amount of outdoor air, as required by local codes, to enter the building. Make minimum position adjustments with at least 10° F temperature difference between the out- door and return-air temperatures.

85

90

95

100

105

110

(29)

(32)

(35)

(38)

(41)

(43)

CONTROL

CURVE

A

B

C

D

1

8

 

1

6

 

1

4

 

1

2

 

CONTROL POINT

APPROX. °F (°C)

AT 50% RH

73(23)

70(21)

67(19)

63(17)

 

 

 

 

 

 

 

 

 

 

 

 

PO

U

N

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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(10)

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(7)

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(4)

35

(2)

 

 

 

 

 

 

IR

 

40

 

 

 

Y

A

3

8

 

 

DR

 

 

 

 

 

 

 

 

 

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65

(18)

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42

70

(21)

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0

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80

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75

(24)

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(

 

 

 

 

 

 

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HUM

 

 

 

 

 

 

 

 

 

20

0 1

HIGH LIMIT

CURVE

35

40

45

50

55

60

65

70

75

80

85

90

95

100

105

110

(2)

(4)

(7)

(10)

(13)

(16)

(18)

(21)

(24)

(27)

(29)

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(35)

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APPROXIMATE DRY BULB TEMPERATURE— °F (°C)

Fig. 31 — Enthalpy Changeover Set Points

21

Image 21
Contents Contents Safety ConsiderationsInstallation Provide Unit Support Roof Curb Details 580F180-240 Roof Curb Details 580F300 II. RIG and Place Unit Alternate Unit SupportPositioning Roof Mount580F Ft-in 180 Unit Maximum Dimensions Shipping Weight210 240Base Unit Dimensions 580F180 Base Unit Dimensions 580F240 Base Unit Dimensions 580F300 Physical Data Furnace Section Power ExhaustFreeze Protection Thermostat F OUTDOOR-AIR Inlet ScreensIII. Field Fabricate Ductwork Install Flue Hood and Wind BaffleIV. Make Unit Duct Connections VI. Trap Condensate DrainVII. Orifice Change VIII. Install GAS Piping Field Control WiringOptional Non-Fused Disconnect Optional Convenience Outlet Field Power Wiring ConnectionsXI. Install OUTDOOR-AIR Hood Make OUTDOOR-AIR Inlet Adjust MentsElectrical Data Manual Outdoor-Air DamperOutdoor-Air Hood Component Location XII. Install ALL AccessoriesMotormaster V Control Installation 580F240 Motormaster V Control Package UsageApplicable Voltages and Motors Return Air Pressure Drop in. wg Outdoor Air Damper LeakageEconoMi$erIV Standard Sensors CFMEconoMi$erIV Control Modes Temperature FEconoMi$erIV Controller Potentiometer LED Locations EconoMi$erIV Sensor UsageEnthalpy Changeover Set Points EconoMi$erIV Controller CO2 Sensor Standard Settings Llsv LPSTran Page VI. Internal Wiring IV. Refrigerant Service PortsSTART-UP Unit PreparationAirflow Fan Performance 580F180275 Low Heat Units7200 7500 Fan Performance 580F180360 High Heat UnitsFan Performance 580F210275 Low Heat Units Fan Performance 580F210360 High Heat UnitsRpm Bhp Watts 500 Fan Performance 580F240275 Low Heat Units Rpm Watts Bhp 000500 000 10,000 000 500 10,000 Fan Performance 580F240360 High Heat UnitsFan Performance 580F300275 Low Heat Units Fan Performance 580F300360 High Heat UnitsGeneral Notes for FAN Performance Data Tables Fan Rpm at Motor Pulley Settings Accessory/FIOP Static Pressure in. wg 580F180-300Air Quantity Limits Evaporator-Fan Motor DataXIII. Operating Sequence Service CleaningII. Lubrication IV. Evaporator FAN Service and ReplacementVI. CONDENSER-FAN Adjustment Belt Tension AdjustmentVII. Power Failure VIII. Refrigerant ChargePerfect Humidity System Charging IX. GAS Valve AdjustmentNatural Gas Main BurnersXVII. Optional Hinged Access Doors XV. Replacement PartsXI. Filter Drier XII. Protective DevicesSpark Gap Adjustment Typical Wiring Schematic 580F240, 208/230 V Shown Typical Component Arrangement 580F240 Shown CLO AHAComp EquipII. ECONOMI$ERIV Troublshooting Troubleshooting Unit TroubleshootingEconoMi$erIV Troubleshooting Completion Heating Service AnalysisProblem Cause Remedy Cooling Service Analysis IGC Control Heating and Cooling Inputs Outputs EconoMi$erIV Input/Output LogicDemand Control Enthalpy Terminal†Index HumidistatCall for Free Catalog Service TrainingCopyright 2006 Bryant Heating & Cooling Systems Catalog no Page Temperatures START-UP ChecklistPRE-START-UP II. START-UP Electrical
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580F specifications

The Bryant 580F is a highly regarded gas furnace known for its exceptional heating performance and advanced technology. Designed for residential use, this model stands out for its reliability, efficiency, and user-friendly features that cater to modern heating demands.

One of the most notable features of the Bryant 580F is its efficiency rating. With an AFUE (Annual Fuel Utilization Efficiency) rating of up to 95%, this furnace maximizes heat output while minimizing energy consumption. This high level of efficiency not only results in lower utility bills but also reduces the environmental impact—a critical consideration for today’s eco-conscious homeowners.

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Safety is also a primary concern with the Bryant 580F. It includes robust safety features such as a hot surface ignition system that eliminates the need for a standing pilot light, reducing the risk of gas leaks. Additionally, advanced diagnostics help in troubleshooting and maintenance, ensuring that potential issues can be identified and resolved quickly.

In conclusion, the Bryant 580F gas furnace is a remarkable choice for those seeking a blend of efficiency, comfort, and advanced technology. Its high AFUE rating, multi-speed blower, smart control compatibility, and safety features make it a reliable option for homeowners looking to invest in a dependable heating solution. As the demand for energy-efficient heating continues to grow, the Bryant 580F stands out as a model that meets and exceeds expectations in the modern heating landscape.