Are you looking to install an air conditioning unit and need to know how to wire a dual capacitor? This guide will give you a step-by-step process on how to wire a 3 wire AC dual capacitor. A dual capacitor is used in air conditioning systems that have both a compressor and a fan motor. The capacitor is responsible for storing electrical energy that is used to start the motor and run it.
What is a Dual Capacitor?
A dual capacitor is a type of capacitor that has two capacitors in one package. It is responsible for storing electrical energy that is used by the compressor and fan motor. The two capacitors are connected in parallel, meaning that they share the same voltage, but each capacitor is responsible for a different task.
The first capacitor is responsible for providing the power needed to start the compressor. The second capacitor is responsible for providing the power needed to start the fan motor. Once the compressor and fan motor have started, the capacitors continue to provide power to keep them running.
Materials Needed
Before you start wiring your dual capacitor, you will need to gather the following materials:
- Dual capacitor
- Wire cutters/strippers
- Electrical tape
- Phillips and flat-head screwdrivers
- Manual for your specific air conditioning unit
Step-by-Step Guide
Step 1: Turn Off Power
Before you start wiring your dual capacitor, make sure you turn off the power to your air conditioning unit. This can be done by turning off the circuit breaker that powers your AC unit.
Step 2: Remove Access Panel
Next, remove the access panel on the outside of your air conditioning unit. This will give you access to the capacitor.
Step 3: Discharge Capacitor
Before handling the capacitor, you need to discharge it by shorting the terminals with an insulated screwdriver. This will prevent any electrical shock when handling the capacitor.
Step 4: Identify Wires
Identify the wires that are connected to the dual capacitor. There should be three wires – one wire connects to the fan motor, one wire connects to the compressor, and one wire is a common wire that connects to both the fan motor and compressor.
Step 5: Disconnect Wires
Use your wire cutters/strippers to disconnect the wires from the old capacitor. Make sure you remember which wire connects to which terminal.
Step 6: Connect New Capacitor
Connect the new dual capacitor by connecting the fan motor wire to the fan terminal on the capacitor, the compressor wire to the hermetic terminal on the capacitor, and the common wire to the common terminal on the capacitor. Make sure you connect the wires to the correct terminals.
Step 7: Secure Capacitor
Once the wires are connected, secure the capacitor to the mounting bracket using screws and a screwdriver.
Step 8: Replace Access Panel
Replace the access panel on the outside of your air conditioning unit and turn the power back on.
FAQ
What happens if I wire the dual capacitor incorrectly?
If you wire the dual capacitor incorrectly, it can cause serious damage to your air conditioning unit, including burning out the compressor and fan motor. This can be expensive to repair and may require replacing the entire unit.
Can I replace a dual capacitor myself?
Yes, you can replace a dual capacitor yourself if you have the necessary tools and knowledge. However, if you are not comfortable working with electricity, it is best to hire a professional to do the job.
How do I know if my dual capacitor needs to be replaced?
If your air conditioning unit is not starting or is making unusual noises, it may be a sign that your dual capacitor needs to be replaced. You can also test the capacitor with a multimeter to see if it is functioning properly.
Conclusion
Wiring a 3 wire AC dual capacitor is a simple process, but it is important to do it correctly to prevent damage to your air conditioning unit. Make sure you turn off the power, discharge the capacitor, and identify the wires before disconnecting them. Then, connect the new capacitor to the correct terminals and secure it in place before turning the power back on.
| Terminals | Function |
|---|---|
| Common | Connects to both fan motor and compressor |
| Fan | Connects to fan motor |
| Hermetic | Connects to compressor |
