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Kohler dec 3 identification help

BrianHaze

Subscriber
Last Subscription Date
11/08/2020
I recently had 2 kohler boards out of a dec 3.
One has he usual label on it a-336415. (green board)
The other one has the label A347283 (green board)
Component wise they both are identical.
What Im getting between the two is that one has cooldown and one does not.
Is there a kohler tech that could verify that is what the difference is?
I see the newer boards do both but it i not specific as to if the cool down was the difference or not.
 

Zephyr7

Registered
You should be using the cool down. The only reason not to have the controller do it is so that you can adjust the time from a controller in something else like an ATS. I’d leave the generator controller configured for the 5 minute colldown option.

Bill
 

pegasuspinto

Registered
Most ATS have the cooldown built in. Most times the cooldown in the DEC3 just causes the cooldown to be 10 minutes not 5. IMHO, 5 minute cooldown is plenty.
 

pegasuspinto

Registered
Call flight systems and ask them. They are generally pretty helpful and they've had their hands on every version possible.
 

BrianHaze

Subscriber
Last Subscription Date
11/08/2020
flight is where this question appeared from to begin with. I have contacted several companies and no one knows. I called kohler and well, tech info is like digging for a prize out of cracker jacks boxes.
 

Zephyr7

Registered
You need to either find an old school Kohler tech (they’re out there), or talk to the factory. Kohler has info on pretty much everything they’ve ever made. I asked one of the factory engineering people (he was in my area telling me about new paralleling switchgear), and I asked about their load sensing auto start system they used back in the 1920s — I was curious how it worked. A few days later when he got back to his office in Wisconsin, he emailed me schematics from the 1920’s.

I did tell Kohler power systems about this forum, and mentioned that they could win a lot of brownie points and potential new customer goodwill by participating, but they probably don’t have the manpower.

You might try calling the factory. They don’t usually talk directly to customers, but you might get lucky. I know they really do have all the old info, you just need to find someone willing to go find it for you.

Bill
 

LWB250

Registered
As a former Kohler employee, I can assure you they have all the old info. I used to have binders full of the stuff at my desk or in my work area. If I couldn't find it, Engineering had more detailed things in their area as well.

However, that being said, many of the people I worked with are at or nearing retirement age, and when they go the knowledge pertaining to the older relay controllers and rotating armature sets will go with them. The real joy of working there was that I could walk upstairs to Engineering and speak with people who were involved in the design and implementation of a lot of those older controls and alternators. There was a knowledge pool that was unbelievable, and a real privilege to be able to work with.

As for DEC-III, they all had five minute cool down built into the logic as long as you were running in the "automatic" mode. When 3&4 are opened, the timer would begin and after five minutes open the start circuit.

When they started going to the DEC-IIIE, or the DEC-III controller with the LCD display that integrated with the M340, cool down could be programmed at the controller and was not fixed.

Cool down in a Kohler ATS was an option and fairly rare with the exception of the R-340 (relay) logic. These were often paired with R-Series models that did not have cool down built into their controllers.

Dan
 
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