johnson controls a419

[slin]

I am having some troubles with the johnson controls a419 temp control I just purchased. The temperature and when it cuts on and off seems to be a little out of wack. I don't suppose someone could list there settings here so I could input them into mine. I am thinking I screwed something up.

Thanks!!!!

[Sent From My iPhone]

You're going to have to make sure the jumpers are installed properly, which will require you to remove the cover of the unit. I'm not sure how they come from the factory, but the position of the jumpers will determine if the controller is set for heating or cooling. Read the instructions carefully.

[slin]

It is set for cooling

[slin]

Its almost as if the temperature on the control has a delay or is not measuring the fridge in real time. Example, the temp is set to 68 on the controller and it does not stop until the temp reaches 64- 62 in the fridge. I have the differential set to 1 and all other settings set to 0.

[jacbop]

You can get a user's manual online here:
http://cgproducts.johnsoncontrols.com/M ... 125188.PDF

And for the impatient, here is a summary:
press menu and then use the arrows to cycle through the submenus:
SP: setpoint (-30 to 212F, factory default = 30)
dIF: differential (1 to 30F, default = 5)
ASd: anti-short cycle delay (0 to 12 minutes, default = 1)
OFS: temperature offset (0 to 50F, default = 0)
SF: sensor failure operation (0 = power off, 1 = power on, default = 1)

Press enter to choose a sub-menu and then use the arrows to change the value for that setting. Press enter to confirm the setting.

There are dip switches inside the unit (if you open it up with a screwdriver) that allow you to set it for heating rather than cooling.

To switch between farenheit and celsius, hold down both arrow keys for a few seconds.

When you set the setpoint temp you will see a snowflake if in cooling mode and a flame if in heating mode.

[jacbop]

And here are my personal settings for a kegerator or beer storage fridge:

SP: 39F
dIF: 2F
ASd: 5min
OFS: 0F
SF: 0

For a fermentation fridge (at say 62F) I would suggest:

SP: 61F
dIF: 1F
ASd: 1min
OFS: 0F
SF: 0

- Ignore the OFS. It is for a secondary setting, kind of like setting your heater to 72F during the day and 65F at night.
- I set SF=0 so I don't freeze beer or crash yeast if the probe fails.
- The ASd makes sure your compressor is not turning on and off constantly and it will depend upon your application and the ambient temp around the fridge.
- You can also change jumpers to whether the fridge should kick on when the SP temp is reached (60-61F in the example above) or kick on when the SP + dIF temp is reached (61-62F in the example above)