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How to hook up an electric motor start or run capacitor This article gives electric motor start run capacitor installation wiring instructions for electric motor capacitors designed to start run an electric motor such as an AC compressor, heat pump compressor or a fan motor, and how to wire up a hard starting air conditioner compressor motor, fan motor, to get an air conditioner, heat pump, refrigerator, or freezer compressor or other electric motor such as a well pump going. This electric motor capacitor article series explains the selection, installation, testing, use of electric motor starter start and run capacitors used on various electric motors found in or at buildings such as air conditioner compressors, fan motors, some well pumps and some heating equipment. Green links show where you are. Copyright 2. 01. 7 Inspect. Apedia. com, All Rights Reserved. How to Install and Wire Up an Air Conditioner Compressor, Blower Motor, or Fan Motor Hard Starting Capacitor. Make These Simple AC Compressor Checks Before Adding a Hard Start Capacitor. Most electrical problems in air conditioning systems are in the compressors and their relays or motor overload switches. In a single phase common residential AC compressor you can verify with an ohmmeter whether or not the AC compressor is bad. Click to enlarge the image at leftWatch out live high voltage may be present at a capacitor, capable of giving a tremendous electrical shock even after electrical power has been disconnected at the equipment. Never work on live electrical equipment. Alsosee STARTING CAPACITOR SAFETYA fractional horsepower electrical motor should show different electrical resistance between the three terminals Start, Run, and Common as we illustrate just below. Find the two highest resistance terminals. The third one will be the common terminal. Our example is for a Frigidaire compressor motor. In our capacitor testing and wiring sketch at left, you note we use the letters S, C, and R to identify the usual terminals to which a startrun capacitor is wired. On many systems these terminals may be labeled so that the three leads on a startrun capacitor can be wired correctly S  start wire connector. R  Run wire connector. American Psychological Association rules for formatting papers, intext citations, and end references. Examples based on the sixth edition of the Publication Manual. International programme on chemical safety environmental health criteria 63 organophosphorus insecticides a general introduction this report contains the. Electric Motor Hard Starting Capacitor Wiring Installation Installation Wiring Guide to Air Conditioning Compressor Motor Other Electric Motor StartBoost or Run. You have not yet voted on this site If you have already visited the site, please help us classify the good from the bad by voting on this site. SAM. gov The System for Award Management SAM is the Official U. S. Government system that consolidated the capabilities of CCRFedReg, ORCA, and EPLS. Johnson Controls Serial Number Nomenclature Examples YoutubeJohnson Controls Serial Number Nomenclature Examples ChemistryC  common connector. See How to INSTALL WIRE Up an Air Conditioner Compressor, Blower Motor, or Fan Motor Hard Starting Capacitor. Electric Motor run speed side note Incidentally while most electric motors are marked with a data tag indicating the motor run speed in RPMs its worth noting that the number of run coils is what determines the run speed of the motor. Two coils marks a motor that runs at 3. V, 6. 0 cyclesec x 6. Electric motor diagnostic procedures are given in detailat ELECTRIC MOTOR DIAGNOSTIC GUIDESimple Relay and Hard Start Capacitor Wiring Instructions Example 1. Relay and hard start capacitors such as the Starter Pow R Pak sold by Sealed Unit Parts Co., can be installed with no wiring changes to the original system whatsoever. Quoting from Part No. SPP 5, a relay and hard start capacitor sold by that company Connect the two wires from the SPP 5 in parallel with the existing, already installed run capacitor one wire each side without removing any original wires. Use special piggy back terminal of the SPP 5 if all the run capacitor terminals are being used. Install only on PSC units equipped with run capacitor. Simple Relay and Hard Start Capacitor Wiring Instructions Example 2. Here are some sample capacitor installation instructions for adding a motor starter capacitor to an air conditioning compressor motor taken from the product package for a relay and start capacitor intended for use on a refrigerator or freezer. Similar starter capacitors are available for air conditioning compressors. Click to enlarge any imageRemove the power supply cord from the electrical outlet in other words, be absolutely certain that electrical power has been turned off to the equipment being serviced. Remove the old starting relay, leaving the old overload protection in place. Push the wire with the one single pin terminal onto the start terminal of the air conditioning compressor. See the wiring diagram above. Push the other wire with the pin terminal onto the run terminal of the air conditioning compressor. Connect the line from the old starting relay to the spade terminal on the run wire insulating sleeve. Restore electrical power. Start Run Capacitor Mounting Positions. Startrun electric motor capacitors can be mounted in any direction or position. However there are some other capacitor mounting considerations that can affect capacitor life basically you want to minimize the capacitors exposure to vibration and heat. As Afacp points out,. the temperature on the surface of the capacitor cannot exceed, even under the worst conditions, the maximum permitted. It is advisable to make an experimental measurement of the temperature reached by the capacitor under the. Watch out Air Conditioner Motor Starting Capacitor Safety warnings When testing a compressor, one must discharge the capacitor first Itll otherwise have enough power stored on it to be at least very painful. Author and others have been zapped Some systems will automatically discharge the capacitor, but shorting its leads to ground with a screwdriver. Motor starting capacitors can hold a charge for days If oil has leaked out of a capacitor. Dont touch any oil that leaked out old capacitors may contain PCB oils, an extremely carcinogenic cancer causing material. Once the capacitor has been discharged as described just above, then. Either use the meters built in capacitor test function, or use this trick. Charge the capacitor by using the sense current the meter puts out when set to ohms. You should observe a rapidly rising resistance before the meter indicates over rangeinfinity. Disconnect the test leads, and switch over to volts. Then, reconnect the test leads. A voltage reading should be observed, approaching zero. If the capacitor doesnt hold a charge, or the resistance reading never approaches infinity, it probably needs replacement. Also, the capacitor may be defective if the compressor hums but does not start. Visual inspection may reveal it to be bulged, or have a blown out safety plug. Start Run Capacitor Fan or Compressor Motor Wiring Color Codes Connections. Im replacing my run capacitor in my air handler. I forgot to mark the wires I took off. I have 4 wires. A blue, a black, a yellow, and a brown. Brown, and yellow come from the motor. Red, and black go to a control box. What goes where Brian RE wiring up an HVAC air handler fan motor capacitor You reported four but listed five wirres in your air handler and that were connected to the run capacitor BLUEBLACK to a control box. YELLOW from motor. BROWN from motor. RED to a control box. CThe reason you can spend hours looking at online chats about HVAC start run capacitor wiring without finding a single absolutely right guide to capacitor wiring color codes is that the service techs who make these repairs dont want to give an answer that kills someone or burns up their equipment. Watch out touching live voltage can kill you. Turn power off and discharge any capacitors before touching anything.