Bryant 580F operation manual Troubleshooting Unit Troubleshooting, II. ECONOMI$ERIV Troublshooting

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TROUBLESHOOTING

I. UNIT TROUBLESHOOTING

Refer to Tables 26-28 and Fig. 47.

II. ECONOMI$ERIV TROUBLSHOOTING

See Table 29 for EconoMi$erIV logic.

A functional view of the EconoMi$erIV is shown in Fig. 48. Typical settings, sensor ranges, and jumper positions are also shown. An EconoMi$erIV simulator program is avail- able from Bryant to help with EconoMi$erIV training and troubleshooting.

A. EconoMi$erIV Preparation

This procedure is used to prepare the EconoMi$erIV for troubleshooting. No troubleshooting or testing is done by performing the following procedure.

NOTE: This procedure requires a 9-v battery, 1.2 kilo-ohm resistor, and a 5.6 kilo-ohm resistor which are not supplied with the EconoMi$erIV.

IMPORTANT: Be sure to record the positions of all potenti- ometers before starting troubleshooting.

1.Disconnect power at TR and TR1. All LEDs should be off. Exhaust fan contacts should be open.

2.Disconnect device at P and P1.

3.Jumper P to P1.

4.Disconnect wires at T and T1. Place 5.6 kilo-ohm resistor across T and T1.

5.Jumper TR to 1.

6.Jumper TR to N.

7.If connected, remove sensor from terminals SO and +. Connect 1.2 kilo-ohm 4074EJM checkout resistor across terminals SO and +.

8.Put 620-ohm resistor across terminals SR and +.

9.Set minimum position, DCV set point, and exhaust potentiometers fully CCW (counterclockwise).

10.Set DCV maximum position potentiometer fully CW (clockwise).

11.Set enthalpy potentiometer to D.

12.Apply power (24 vac) to terminals TR and TR1.

B. Differential Enthalpy

To check differential enthalpy:

1.Make sure EconoMi$erIV preparation procedure has been performed.

2.Place 620-ohm resistor across SO and +.

3.Place 1.2 kilo-ohm resistor across SR and +. The Free Cool LED should be lit.

4.Remove 620-ohm resistor across SO and +. The Free Cool LED should turn off.

5.Return EconoMi$erIV settings and wiring to normal after completing troubleshooting.

C.Single Enthlapy

To check single enthalpy:

1.Make sure EconoMi$erIV preparation procedure has been performed.

2.Set the enthalpy potentiometer to A (fully CCW). The Free Cool LED should be lit.

3.Set the enthalpy potentiometer to D (fully CW). The Free Cool LED should turn off.

4.Return EconoMi$erIV settings and wiring to normal after completing troubleshooting.

D. DCV (Demand Controlled Ventilation) and Power Exhaust

To check DCV and Power Exhaust:

1.Make sure EconoMi$erIV preparation procedure has been performed.

2.Ensure terminals AQ and AQ1 are open. The LED for both DCV and Exhaust should be off. The actuator should be fully closed.

3.Connect a 9-v battery to AQ (positive node) and AQ1 (negative node). The LED for both DCV and Exhaust should turn on. The actuator should drive to between 90 and 95% open.

4.Turn the Exhaust potentiometer CW until the Exhaust LED turns off. The LED should turn off when the potentiometer is approximately 90%. The actuator should remain in position.

5.Turn the DCV set point potentiometer CW until the DCV LED turns off. The DCV LED should turn off when the potentiometer is approximately 9 v. The actuator should drive fully closed.

6.Turn the DCV and Exhaust potentiometers CCW until the Exhaust LED turns on. The exhaust con- tacts will close 30 to 120 seconds after the Exhaust LED turns on.

7.Return EconoMi$erIV settings and wiring to normal after completing troubleshooting.

E.DCV Minimum and Maximum Position

To check the DCV minimum and maximum position:

1.Make sure EconoMi$erIV preparation procedure has been performed.

2.Connect a 9-v battery to AQ (positive node) and AQ1 (negative node). The DCV LED should turn on. The actuator should drive to between 90 and 95% open.

3.Turn the DCV Maximum Position potentiometer to midpoint. The actuator should drive to between 20 and 80% open.

4.Turn the DCV Maximum Position potentiometer to fully CCW. The actuator should drive fully closed.

5.Turn the Minimum Position potentiometer to mid- point. The actuator should drive to between 20 and 80% open.

6.Turn the Minimum Position Potentiometer fully CW. The actuator should drive fully open.

7.Remove the jumper from TR and N. The actuator should drive fully closed.

8.Return EconoMi$erIV settings and wiring to normal after completing troubleshooting.

F.Supply-Air Input

To check supply-air input:

1.Make sure EconoMi$erIV preparation procedure has been performed.

2.Set the Enthalpy potentiometer to A. The Free Cool LED turns on. The actuator should drive to between 20 and 80% open.

3.Remove the 5.6 kilo-ohm resistor and jumper T to T1. The actuator should drive fully open.

4.Remove the jumper across T and T1. The actuator should drive fully closed.

5.Return EconoMi$erIV settings and wiring to normal after completing troubleshooting.

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Contents Safety Considerations ContentsInstallation Provide Unit Support Roof Curb Details 580F180-240 Roof Curb Details 580F300 Roof Mount Alternate Unit SupportII. RIG and Place Unit Positioning240 Unit Maximum Dimensions Shipping Weight580F Ft-in 180 210Base Unit Dimensions 580F180 Base Unit Dimensions 580F240 Base Unit Dimensions 580F300 Physical Data OUTDOOR-AIR Inlet Screens Power ExhaustFurnace Section Freeze Protection Thermostat FVI. Trap Condensate Drain Install Flue Hood and Wind BaffleIII. Field Fabricate Ductwork IV. Make Unit Duct ConnectionsVII. Orifice Change Field Control Wiring VIII. Install GAS PipingOptional Non-Fused Disconnect Optional Convenience Outlet Field Power Wiring ConnectionsManual Outdoor-Air Damper Make OUTDOOR-AIR Inlet Adjust MentsXI. Install OUTDOOR-AIR Hood Electrical DataOutdoor-Air Hood Component Location XII. Install ALL AccessoriesMotormaster V Control Package Usage Motormaster V Control Installation 580F240Applicable Voltages and Motors CFM Outdoor Air Damper LeakageReturn Air Pressure Drop in. wg EconoMi$erIV Standard SensorsEconoMi$erIV Control Modes Temperature FEconoMi$erIV Controller Potentiometer LED Locations EconoMi$erIV Sensor UsageEnthalpy Changeover Set Points EconoMi$erIV Controller CO2 Sensor Standard Settings LPS LlsvTran Page Unit Preparation IV. Refrigerant Service PortsVI. Internal Wiring START-UPAirflow Fan Performance 580F180275 Low Heat Units7200 7500 Fan Performance 580F180360 High Heat UnitsFan Performance 580F210360 High Heat Units Fan Performance 580F210275 Low Heat UnitsRpm Bhp Watts 500 Rpm Watts Bhp 000 Fan Performance 580F240275 Low Heat Units500 000 10,000 000 500 10,000 Fan Performance 580F240360 High Heat UnitsFan Performance 580F300360 High Heat Units Fan Performance 580F300275 Low Heat UnitsGeneral Notes for FAN Performance Data Tables Evaporator-Fan Motor Data Accessory/FIOP Static Pressure in. wg 580F180-300Fan Rpm at Motor Pulley Settings Air Quantity LimitsXIII. Operating Sequence Service CleaningII. Lubrication IV. Evaporator FAN Service and ReplacementVIII. Refrigerant Charge Belt Tension AdjustmentVI. CONDENSER-FAN Adjustment VII. Power FailureMain Burners IX. GAS Valve AdjustmentPerfect Humidity System Charging Natural GasXII. Protective Devices XV. Replacement PartsXVII. Optional Hinged Access Doors XI. Filter DrierSpark Gap Adjustment Typical Wiring Schematic 580F240, 208/230 V Shown Typical Component Arrangement 580F240 Shown Equip AHACLO CompII. ECONOMI$ERIV Troublshooting Troubleshooting Unit TroubleshootingHeating Service Analysis EconoMi$erIV Troubleshooting CompletionProblem Cause Remedy Cooling Service Analysis IGC Control Heating and Cooling Terminal† EconoMi$erIV Input/Output LogicInputs Outputs Demand Control EnthalpyIndex HumidistatCall for Free Catalog Service TrainingCopyright 2006 Bryant Heating & Cooling Systems Catalog no Page II. START-UP Electrical START-UP ChecklistTemperatures PRE-START-UP
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580F specifications

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