Carrier Contactor - Replace SPST with DPST


Old 12-27-10, 09:37 PM
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Carrier Contactor - Replace SPST with DPST

Went and picked up replacement contactor for Carrier compressor, and they replaced my SPST (with shunt) contactor with DPST model.

Both physically look like these. I carefully removed each lead from terminals and transferred them to the terminals located physically on the new contactor before I realized they were different. Question is, how to wire the new one. I can't find a schematic of either model. Old model had terminals 11 ,12, 23, and 23. The new one has L1 and T1, L2 and T2.

Do I need to just jumper the L1's adn L2's on the new contactor?


Last edited by bc0167; 12-27-10 at 10:08 PM.
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Old 12-28-10, 06:04 PM
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Since the old contactor was just a single pole, I would assume the compressor operates on 120 volts. Is that correct? L1 and L2 are the line terminals and T1 and T2 are most likely the load terminals on the new contactor. How many wires came off the old contactor? I am assuming 1 load, 1 line and 2 wires went to the coil. Is that correct? If the compressor is just 120 volts, you only need to use 1 pole on the new contactor. Try using L1 for the line connectoion and T1 for the load.

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