Wildblue19
I'm Awesome
Anyone here know how furnaces are wired? It is truck related I promise.
Long story short, I am running 2 AC compressors in my truck and I'd like a delay between the two compressors turning on. I don't want to load down the engine with two compressors switching at once.
There's also a requirement that the systems cycle independently. Both compressors have a low pressure cutoff switch. I don't want one switch tripping to cut power to both clutches.
I found this furnace relay which has a 4 second start delay and 2 minute shut off delay. I don't know if it will work and the manufacturer website obviously isn't helpful toward my situation.
I imagine the controller senses when the t stat is engaged, and then waits 4 seconds to send 12v to the motor. When the t Stat shuts off, the motor runs for 2 minutes.
In my case, 12V will be IGN 12V. T Stat will be the #1 compressor with the low pressure switch in series. Motor will be compressor 2 with its own low pressure switch.
If system 1 triggers the low pressure switch, I get 2 minutes of the second system before the relay cuts power, which should be plenty. If compressor 2 triggers it's low pressure switch, system 1 is unaffected.
Any furnace guys think this is reasonable? Issues I can forsee are the relay seeing 14v and not a pure 12v signal, as well as the inrush current through the controller if system 2 triggers and connects the "motor" pin to ground when it's not expecting it to.
Long story short, I am running 2 AC compressors in my truck and I'd like a delay between the two compressors turning on. I don't want to load down the engine with two compressors switching at once.
There's also a requirement that the systems cycle independently. Both compressors have a low pressure cutoff switch. I don't want one switch tripping to cut power to both clutches.
I found this furnace relay which has a 4 second start delay and 2 minute shut off delay. I don't know if it will work and the manufacturer website obviously isn't helpful toward my situation.
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I imagine the controller senses when the t stat is engaged, and then waits 4 seconds to send 12v to the motor. When the t Stat shuts off, the motor runs for 2 minutes.
In my case, 12V will be IGN 12V. T Stat will be the #1 compressor with the low pressure switch in series. Motor will be compressor 2 with its own low pressure switch.
If system 1 triggers the low pressure switch, I get 2 minutes of the second system before the relay cuts power, which should be plenty. If compressor 2 triggers it's low pressure switch, system 1 is unaffected.
Any furnace guys think this is reasonable? Issues I can forsee are the relay seeing 14v and not a pure 12v signal, as well as the inrush current through the controller if system 2 triggers and connects the "motor" pin to ground when it's not expecting it to.