Question about Bunn CDBCF 35 Coffee Maker

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Electrical wiring for 120/208 service as opposed to 120/240 service

I'm trying to figure out how to wire this coffeemaker for 120/208 service. The manual states that "model 35 requires 3-wire, grounded service rated 120/208 or 120/240 volts ac, 20 amp, single phase, 60 Hz.", and 240 is not an option in the location it's going into. I would like to know how to connect it internally, what type of cord toget, and what type of plug cap to get (and how to wire that as well). Thank you for any and all help.... the outlets in the location (office breakroom) are all standard, and I was thinking of plugging it into where the fridge is as that is for sure rared for 20 amp.....

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  • Anonymous May 12, 2009

    I have the same model and am trying to convert to 120v for home use.Is there any way to rewire this model, or any 240v circuit for 120v? I am going to be disconnecting the 2 top warming elements, so the total amperage required will be considerably less.

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I have the same problem...and it appears to me that all the electronics operate off 120V and only the heater element is connected to the red wire and gets 240V. The schematic shows that the model 15 and model 20 simply connect the heater to the white wire.

I would imagine that you can simply jumper the red to the white and the heater will get half the power but it should operate otherwise normal.

Posted on Aug 20, 2009

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Your machine requires 208-240 volts to operate with each leg being about 120 volts. Move refrigerators are 120 volts so even though you have 20 amps you probably only have 120 volts.

You can go to the Bunn website (bunnomatic.com) click on Commercial then on Publications then Illustrated Parts and Service manuals and download the manual for your machine that shows how the wiring hooks up in the machine and the type of cord the machine requires to handle the voltage.

The plug you need must match the receptacle in the wall and there are numerous 220volt plugs and receptacles on the market. Don't get a dryer plug instead try for a twist lock as they are more reliable.

Posted on Oct 22, 2008

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