Kohler M340 Manual
We have an old Kohler transfer switch that has a bad control board.we were advised to install a conversion kit, instead of just replacing the control board. Transfer switch is about 17 yrs old.part #K-166341-70 conversion kit part # is GM77250-S and is described as a 'Kohler Conversion Kit S340 to MPAC 1500' i am trying to get clarification from our local distributor, but does anyone have any experience with this? What does it do? Is it worth the effort and cost?
How do I explain it to the end user? ElectricianTalk.com - Are you a Professional Electrical Contractor?
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We have an old Kohler transfer switch that has a bad control board.we were advised to install a conversion kit, instead of just replacing the control board. Transfer switch is about 17 yrs old.part #K-166341-70 conversion kit part # is GM77250-S and is described as a 'Kohler Conversion Kit S340 to MPAC 1500' i am trying to get clarification from our local distributor, but does anyone have any experience with this? What does it do?
Is it worth the effort and cost? How do I explain it to the end user?
Thanks I would replace the transfer switch. I do not see the part number for the conversion kit in my parts catalog. I can't find anything on google either.
I may be able to beat your distributors price on a new switch and ship it to you if you are interested. I don't think the control board is available for the old switch anymore. I may be wrong. Depending on the amperage between the cost of the CP and labor, PLUS you must know how to properly adjust the clearing contacts, I am assuming the ATS is actually an asCO with the Kohler CP.
Now if the ATS is larger than 400 amp, the savings drop. But we have completed many of these is 600 amps and higher.
70 AMP KOHLER AUTOMATIC TRANSFER SWITCH -Part Number: K-166341-70 -Rated 277/480 Volt, 3 Phase -4 Wire -3 Pole -60 Hertz -NEMA 1 (Indoor) Enclosure -UL Listed My distributor told me they have stopped production on many of the parts for the older switches. I have the 2012 parts catalog and I don't see the part number he listed in my parts catalog. Where do you get your parts BrianJ? This is a FUBAR situation. We do a lot of business with the supply house side of the local Kohler rep.but their generator division is a fiefdom unto itself.i'm not a fan. We're working with them on this, but they just want to tell us 'change this part, here's the price - $2100.'
I'm trying to figure out the best solution.we tried to push the customer to contact the local kohler rep directly.they didn't want to.they wanted us to fix the issue. Being the dumbass I am, i agreed. So, i at least can give the end user some options and let them decide what they want to do. We have a Kohler S340 model# K-168341-400 with 34BSB listed below the model# S/N: K34043 that no longer switches to the generator after the grid goes down. It does start the generator automatically but I have to manually switch the contactor to the emergency power position. When the power grid is back up and stable the ATS does faithfully switch back to the grid after the prescribed time and shuts off generator after proper cool down. There is a small transformer below the paralleling relay for determining when the main and emergency power are in phase when switching back and forth when both power sources are good.
Kohler M340
But I don't find any Voltage on the primary or secondary of that transformer during any of the tests. It is the same size as the ones in the transformer assembly. My schematic 295078 does not show the paralleling relay (model: 188ODDBX-A 200VAC) nor the two relays to the left of it (part# 295254) labeled 6CR and RR. All these items have Kohler original wiring with their wire numbers. But it surely would be easier to troubleshoot with a schematic for those components missing from Kohler's 295078 and it would help to have a schematic of the controller board (Assly: B-297375 Lot#: 90303) and the relay daughter-card (Assly: B-297878 Lot#: 90-303-69). Kohler and their recommended vendor have not so far been able to provide any of this info.
Kohler M340 Manual
Thanks in advance for any resources or tips you can provide.