Carrier 50HE003-006 Installation Instructions Manual

Contents

68DCV Minimum and Maximum PositionTo check the DCV minimum and maximum position:1. Make sure EconoMi$er IV preparation procedure has beenperformed.2. Connect a 9-v battery to AQ (positive node) and AQ1(negative node). The DCV LED should turn on. Theactuator should drive to between 90 and 95% open.3. Turn the DCV Maximum Position potentiometer tomidpoint. The actuator should drive to between 20 and80% open.4. Turn the DCV Maximum Position potentiometer to fullyCCW. The actuator should drive fully closed.5. Turn the Minimum Position potentiometer to midpoint.The actuator should drive to between 20 and 80% open.6. Turn the Minimum Position Potentiometer fully CW. Theactuator should drive fully open.7. Remove the jumper from TR and N. The actuator shoulddrive fully closed.8. Return EconoMi$er IV settings and wiring to normalafter completing troubleshooting.Supply--Air InputTo check supply-air input:1. Make sure EconoMi$er IV preparation procedure has beenperformed.2. Set the Enthalpy potentiometer to A. The Free Cool LEDturns on. The actuator should drive to between 20 and80% open.3. Remove the 5.6 kilo-ohm resistor and jumper T to T1. Theactuator should drive fully open.4. Remove the jumper across T and T1. The actuator shoulddrive fully closed.5. Return EconoMi$er IV settings and wiring to normalafter completing troubleshooting.Economi$er IV Troubleshooting CompletionThis procedure is used to return the EconoMi$er IV to operation.No troubleshooting or testing is done by performing thefollowing procedure.1. Disconnect power at TR and TR1.2. Set enthalpy potentiometer to previous setting.3. Set DCV maximum position potentiometer to previoussetting.4. Set minimum position, DCV set point, and exhaustpotentiometers to previous settings.5. Remove 620-ohm resistor from terminals S R and +.6. Remove 1.2 kilo-ohm checkout resistor from terminals S Oand +. If used, reconnect sensor from terminals S O and +.7. Remove jumper from TR to N.8. Remove jumper from TR to 1.9. Remove 5.6 kilo-ohm resistor from T and T1. Reconnectwires at T and T1.10. Remove jumper from P to P1. Reconnect device at P andP1.11. Apply power (24 vac) to terminals TR and TR1.50HE,HJ