Digital thermostat wiring

[Danm1]

I would like to replace the old AB mechanical thermostat with something like an STC1000 digital thermostat but my knowledge of electrical wiring would fit on the head of a pin. Attached is a picture of the wires running into the AB thermostat. Can I use these to hook up the STC 1000 or do I have to run new or additional wires? Thanks.

[Greg Brannon]

What is the thermostat controlling?

I see an STC-1000 on Amazon with a pic of the wiring diagram. In the diagram, there are terminals for the sensor, a heater, and an air conditioner, 2 each, 6 terminals total. Whether you have enough wires depends on what the thermostat would be controlling and where the sensor input comes from.

Greg.

[Danm1]

It's controlling a 2003 vintage Adler Barbour top loading freezer (there is a similar, one controlling the spillover fridge next to it) on a Hunter 356.

[sailorboy1]

Yes you can use the original wires. There should be a diagram on the digital unit. The wiring from y
The the old mechanical go to the dry connect and you need to run a pis and neg wire to power the unit

[Danm1]

Sorry but I don't understand. I see yellow, green, black and gray wires. Yellow and green may be connected, or just stem from the gray. Is one pos and one neg? Is the black the load that triggers the compressor? I know I sound like an idiot, but if someone can identify th parts for me I am probably capable to hook them up.

[cram]

It's a mechanical thermostat.... all the control functions are installed at the compressor. The thermostat just closes the circuit to call for cold.

Link to the manual is on your post on the other forum.

[sailorboy1]

Originally Posted by Danm1

Sorry but I don't understand. I see yellow, green, black and gray wires. Yellow and green may be connected, or just stem from the gray. Is one pos and one neg? Is the black the load that triggers the compressor? I know I sound like an idiot, but if someone can identify th parts for me I am probably capable to hook them up.

there are diagrams online, if you can not follow those there is no way a poster on CF is going to be able to help you

[CSYChip]

Then metal tube runs to a bulb that is where the thermostat is sensing the temperature. The digital thermostat should have a thermistor that will need to be mounted where the bulb is. The existing wires are just a mechanical switch and would go to the output relay on the digital control. It should not mater which way they are connected as long as they are normally open (off). You will need to run another pair of wires to power the thermostat.

[Danm1]

Got it. Thanks.