My installed and working motor is a replacement that has the Euro/Chinese terminal labeling and config, if anyone can figure out what that means on any particular labeling day. This is my backup motor and I'm waiting for a new LW5-16 switch to actually make all the connections and give it a try. The colorful diagram and the numbered switch connections with the small F or R in the block show which switch terminals are hot in the Forward or Reverse position. No power makes it past the switch in the OFF position. Mine is actually 240v.īoth lines are disconnected from the motor in the OFF position, and both lines are connected when switched to either the Forward or Reverse position. I'm working with the higher voltage wiring only, 208-240v. But I've been an industrial electrician for over 50 years and am very particular about grounds and other electrical safety. That would require a two pole switch somewhere to be perfectly safe. Meaning that with the usual reversing switch with one line contact, the other will be connected without a switch. For 240 volt connection, there are 2 live wires feeding the motor, but only one line contact. For 120 volt supply, wiring in the reversing switch will be to the diagram for whatever switch you are using. The primary question here is whether you are connecting for 120 or 240 volt supply. It does look to be a usual dual voltage reversible motor. I have to study that diagram with the motor to make good sense of the overall connections. Looking at the connection diagram alone is meaningless to me right now. Reversing the two start winding connections will reverse the direction of rotation. For 120v connection, the start winding is connected in direct parallel with the run windings. For 240 volt connections, the start winding will be connected at the "center tap", the common connection for the run winding. When dealing with 120/240 volt motors, the usual practice is to place the two run windings in parallel(120v) or in series(240v). I'm far from being a motor expert so if you happen to use my wiring methods then you're on your own. I've seen diagrams with 3 and 4 wires to do the same thing but I suspect it has to do with the type of motor and windings. My diagram uses 5 wires from the motor to the switch. My diagram is there along with a blank worksheet if anyone has either a correction or a better/easier way to do it. A final setup that runs and doesn't produce smoke is probably OK, but? I really don't see any other way to make the start winding run on 110v and still retain the reversibility. That leaves us with connections that are probably better than a best guess but maybe not quite the perfect setup. There's so many switch types and incomplete switch and motor information that it's difficult to reach a solid conclusion for a wiring setup. With that design, it appears that the motor could not be reversed even if all of the connection points were available for changing connections.I'll dispense with the background issues (unless you really want to hear the story) and post my wiring diagram both for checking and for a better way to do it. That is a somewhat unusual configuration. Changing the connections changes the voltage applied to the main and auxiliary windings simultaneously. The coil with the H, M, and L connections seems to be the auxiliary winding. Also since the capacitor is not disconnected after starting, the start winding is called an auxiliary winding. Since the capacitor is permanently connected, the motor is called a permanent split capacitor (PSC) motor. The winding connected to the capacitor is the auxiliary or start winding. The motor likely does not produce very much starting torque. The motor can not be reversed because the connections necessary to do that are apparently permanently connected inside the motor. The direction of rotation is indicated by the arrow on the left with "ROT" above it. N and L can probably be interchanged with no bad effect. Connect L to H, M, or L for high, medium or low speed. I believe that symbol is an over-temperature protection device. I would connect N to the top wire with the symbol in the circle.
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