Originally Posted by lincoln
just one thing to point out that the contacts are only rated for 10 amps. A pair of fuses would be a good thing to add. For my deep freeze I had to run an external relay.
yay! a search pulled up a thread similar to my situation. Have a question for your external relay setup as well. I've got a similar temp controller (one channel only for cooling though). Seems as though my compressor draw amperage is higher than the rated capacity of the switching controller internally. (5 amps on the controller circuit vs 5 amps operating draw on the compressor, meaning the draw to get the compressor motor going is more than 5) My compressor will not kick on when the circut detects it's time to start cooling. My solution is going to be an external relay but i'm not sure which type of relay to use.
my switching circuit is 120v/5A, but the power side of the relay needs to be 120v/10A or 15A. I've found some relays on radio-shaft's website, but not sure what i need. Can you maybe elaborate on what relay i would need to drive it? SPDT, DPDT etc?