What is the purple wire on a condenser fan motor?
The original motor has 3 wires – brown, purple, and black, and no ground wire. The purple and brown connect to the capacitor. The black connects to a terminal block of sorts. The new motor has 4 wires – brown, brown with white stripe, black, white, and it does have a ground wire.
How is a start capacitor wired into the motor?
Start capacitors are wired into the auxiliary winding circuit of the motor and are disconnected from the main winding circuit by the centrifugal switch once the motor has reached a predetermined speed (usually 75% of the rated speed). For more information, refer to the wiring diagram further on in this article.
Where does purple wire go on capacitor?
| HVAC Capacitor Wiring Color Codes & Connections – Basics | |
|---|---|
| Wire Color | Typical Connections Blower Assembly / Fan |
| Purple | Fan motor direction reverse to counterclockwise if grounded – connect purple to yellow to reverse. Connect from fan to the COM terminal on the capacitor |
| Red |
Where does the purple wire go on a capacitor?
The red is above it (also on the left) with the purple wire is on the top of the connector.
How can you tell the difference between a run capacitor and a start capacitor?
The start capacitor creates a current to voltage lag in the separate start windings of the motor. The current builds up slowly, and the armature has an opportunity to begin rotating with the field of current. A run capacitor uses the charge in the dielectric to boost the current which provides power to the motor.
Which is the best rescue condenser fan motor?
RESCUE® Liberty™ condenser fans and direct drive blower motors deliver all the premium features of a multi-horsepower motor. The versatility of this motor line eliminates the need for contractors to carry multiple motors, saving them time, space and money.
Where do you wire a new condenser fan motor?
If you purchased a new condenser fan motor with a new single run capacitor, this will be the wiring setup that you’ll be using. You’re going to wire the black lead to where the black lead on your previous condenser fan motor was wired to. This will likely be back to your contactor.
How are rescue motors used in HVAC systems?
RESCUE motors are easily installed and replace a variety of different horsepower applications eliminating the need for temporary substitutions, extra drive time back to the wholesaler and emergency openings in the evening. The RESCUE line of HVAC motors is part of the U.S. MOTORS® brand product family.
Do you need a contactor for a 4 wire fan?
This guide will explain how to wire your new condenser fan motor using a four wire setup or a three wire setup when using a single run capacitor or a dual run capacitor. If you recall from our residential cooling season guide, outdoor condenser units use a switch called a contactor.