Part 7 PID Control Box and Heat
Yesterday afternoon I got the control box mounted but then the rain hit and I didn't get the top or door on it. Today I just wanted to get it sealed up so if it rains while I'm out of town it will stay dry inside.
I was in a hurry because I had other things to do so I'm not very happy with the door and I'm going to fix it when I get back. I made the top removable in case I ever need to get to any of the electronics I can. I sealed it with a 1/4" foam tape gasket and it came out real good. I'm going to find a better seal for the door because this 1/8" foam keeps sticking to the door but it's sealed up tight for right now. The door needs some adjusting and the whole thing needs some touch up paint. I still have to wire up all the electronics too.
Well it's not very pretty right now but I'll get it looking better when I get back:
I have an external mount heat sink for the SSR:
The power supply cord comes out of the junction box through an EMT rubber cord connector:
The heat element cord comes into the junction box through a steel pipe nipple. I have the element sitting on a couple of concrete pavers and I think I'm going to raise it one more. I also want to make a heat shield to go over the cord. The cord is rated at 194* and I don't plan on going over 170* but I think a heat shield will help with longevity:
Inside the box I will have the PID, a power switch, a fuse holder and a circuit breaker mounted on the black face plate on the bottom half. I have a shelf above it to set my Mav's on. There is another pipe nipple going through the wall to run my probes in (as you can see that gasket has got to go, I will find a better seal for the door later):
Here is the nipple inside to bring the probes in. I will plug the pipe with a cork to keep the smoke out of my control box. I am going to mount the thermocouple for the PID on a bracket in the center of the ceiling hanging down a few inches. I can hang my two Mav probes in various locations to see how temps are all over inside:
Well I'll see you in a couple of weeks and hopefully I can get it done!