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-   -   Another TSS2 controller box build (http://www.homebrewtalk.com/f51/another-tss2-controller-box-build-195713/)

TomSD 09-14-2010 04:51 AM

Another TSS2 controller box build
 
1 Attachment(s)

I wanted something I could move around and even let people borrow if needed. I also required an unswitched outlet so I could run a fan/blower or other device if needed.




Here is how I did it...



I attached a parts list but if you don't do electrical stuff you will also need some loose wire and wire caps to wire everything together.

Pretty easy setup with a couple caveats...

1) When you trim the cover plate trim it all from one side. Space is tight and you will only be able to use one clip to secure the Love controller. This means you need all your space to be on one side. A Dremel is the easiest way to trim up the cover and it doesn't really need to be cleaned up as it is all behind the controller once everything is installed.



2) Space is so close you'll need to trim the catch release off the clip before assembling or it will just release and loosen up. I didn't snap a pic of it but what needs to come off is pretty obvious and easy to take care of with a Dremel.

3) Wiring it up is all basic stuff but getting the box closed is a real PITA. There is a lot of wiring and space is tight. This is made worse by the controller being deep so there can't be much packed in behind it. Oh and the controller is attached to the cover plate so the controller has to go in last and you can't jockey the wires very much while it is going in. Really not bad though as long as you fold everything in and pre fold the wiring behind the controller so it falls into place as you push the controller in.


Here is the wiring diagram I made. It has a lousy back of the napkin look to it but it works so here it is.


altrob 12-02-2011 02:29 AM

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still working through a keezer build...slowly slowly. mocked up my controller, but am not an electrician. the idea is to mount the controller at the front of the keezer, with the outlets in a box on the back and the connecting wiring running through the lid/insulation. outlet on the left is "always on" and outlet on the right is "switched." Of course, I don't want to toast the controller or catch my house on fire. feedback welcome!


MedicMike 12-23-2011 02:46 AM

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I received my controller today and finished my fermentation chamber controller tonight. I was able to test it and it worked perfectly.


Bobby_M 04-07-2012 02:38 PM

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I like the project but one suggestion I have for future builders is to use a surface mount box for aesthetics and durability UNLESS you're actually mounting it in the wall. Those plastic cover plates are a little delicate to be sticking out like that. I also think there are more outlets than necessary, but I guess that's personal preference.

Here's my take on it:


Bobby_M 04-07-2012 02:38 PM

2 Attachment(s)

I like the project but one suggestion I have for future builders is to use a surface mount box for aesthetics and durability UNLESS you're actually mounting it in the wall. Those plastic cover plates are a little delicate to be sticking out like that. I also think there are more outlets than necessary, but I guess that's personal preference.

Here's my take on it:


DSmith 07-15-2012 07:42 PM

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Here's a pic of my Love TSS2 with 10' stainless steel tip probe. The outlets on the 2 relays are fused to protect the controller. The switches are a fancy way of unplugging the chest freezer or 40W aquarium heating pad to prevent cycling them if not wanted without changing an internal parameter or to prevent a mistake from a bad parameter setting.

I have a Johnson A419 and have trended data showing that 3F temperature variations is the tightest control possible with the controller probe insulated-over on the outside of the fermenter.

I've trended data with the TSS2 and it can match the A419 control response and also improve control to about 1.2F temperature variations with the controller probe insulated-over on the outside of the carboy. The TSS2 has a lot better program options and seeing the decimal point temperature read-out on the display is really handy.

I've learned that when my freezer turns off after a cycle, the fermenter temperature drops another 1F no matter how big the differential is set. I've found it best to set the cooling differential to 0.5F to keep tight control (freezer cycles about every 1-2 hours) and increase it to 2F-3F when temperature fluctuations don't matter (freezer gets cycled about every 4-10 hours).

Attachment 68376


DSmith 07-17-2012 01:28 PM

3 Attachment(s)

I've been trying different parameter settings to see how tight of temperature control can be obtained with freezer cycles every 1.5-2 hours with the controller probe taped on the outside of the fermenter and insulated over. The chart below shows my best settings that result in about 1.2F total temperature fluctuations. I logged the tightest temperature control using a Johnson A419 controller for comparison.

Attachment 68607

This is the same data as the graph above but with the air temperature inside the freezer shown. A 40W heating pad comes on for a few minutes but really doesn't influence the beer temperature. I want the ability to raise the temperature and the heater would only be on longer when the setpoint is raised.

I plan on using these settings with a 67F setpoint for an ale fermentation and log the temperatures.

Attachment 68606

This graph shows TSS2 settings that get very close to the best temperature control that the Johnson A419 can do for a probe insulated over on the side of a fermenter. These are good settings for cold crashing, lagering & cold conditioning. Changing the r2 to 10 stops the heating relay from cycling.

Attachment 68608


DSmith 07-17-2012 01:28 PM

3 Attachment(s)

I've been trying different parameter settings to see how tight of temperature control can be obtained with freezer cycles every 1.5-2 hours with the controller probe taped on the outside of the fermenter and insulated over. The chart below shows my best settings that result in about 1.2F total temperature fluctuations. I logged the tightest temperature control using a Johnson A419 controller for comparison.

Attachment 68607

This is the same data as the graph above but with the air temperature inside the freezer shown. A 40W heating pad comes on for a few minutes but really doesn't influence the beer temperature. I want the ability to raise the temperature and the heater would only be on longer when the setpoint is raised.

I plan on using these settings with a 67F setpoint for an ale fermentation and log the temperatures.

Attachment 68606

This graph shows TSS2 settings that get very close to the best temperature control that the Johnson A419 can do for a probe insulated over on the side of a fermenter. These are good settings for cold crashing, lagering & cold conditioning. Changing the r2 to 10 stops the heating relay from cycling.

Attachment 68608


DSmith 07-17-2012 01:28 PM

3 Attachment(s)

I've been trying different parameter settings to see how tight of temperature control can be obtained with freezer cycles every 1.5-2 hours with the controller probe taped on the outside of the fermenter and insulated over. The chart below shows my best settings that result in about 1.2F total temperature fluctuations. I logged the tightest temperature control using a Johnson A419 controller for comparison.

Attachment 68607

This is the same data as the graph above but with the air temperature inside the freezer shown. A 40W heating pad comes on for a few minutes but really doesn't influence the beer temperature. I want the ability to raise the temperature and the heater would only be on longer when the setpoint is raised.

I plan on using these settings with a 67F setpoint for an ale fermentation and log the temperatures.

Attachment 68606

This graph shows TSS2 settings that get very close to the best temperature control that the Johnson A419 can do for a probe insulated over on the side of a fermenter. These are good settings for cold crashing, lagering & cold conditioning. Changing the r2 to 10 stops the heating relay from cycling.

Attachment 68608


DSmith 08-13-2012 01:54 PM

1 Attachment(s)

I used my new TSS2 for fermentation control with 0.5F differential and overlayed the fermenter temperature data with a very similar fermentation that was done with the Johnson A419 (1.0 differential = smallest setting) - graph below.

The TSS2 had 1.2F temperature swings, the A419 had 3.0F temperature swings. The TSS2 cycled twice often (every 3 hours).

My cold chest freezer keeps cooling the fermenter after it is cycled off by about 0.7F. Decreasing the differential to
Attachment 71741



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