My Fetco CBS-61H took a dump this morning. One of the 220V hot leads that go to the heating coils just melted. You can see the fried lead in this pic:



The lug on top pulled right out of the component when I tried reconnecting. This the the service / parts manual, but I can't find that part anywhere. It says load resistor on the part. I see the terminal block (#4) on page 14, but I don't see the load resistor anywhere.

http://download.partstown.com/is-bin/in ... 1H_spm.pdf

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I believe that's called a mercury relay in the the wiring document:

http://fetco.com/images/Galerie/61h(-15 ... ctions.pdf

Probably means you'll need to find a contractor or SSR that will work and fit. It looks like Fetco replaces it with their P/N 108071 relay, solid state, 50amp 600V. See http://fetco.com/images/Galerie/cbs-500 ... ts[27].pdf

Ira

So conceptually it's full of mercury so be careful taking it off so you don't spill mercury everywhere.

Ira

ira wrote:I believe that's called a mercury relay in the the wiring document:

http://fetco.com/images/Galerie/61h(-15 ... ctions.pdf

Probably means you'll need to find a contractor or SSR that will work and fit. It looks like Fetco replaces it with their P/N 108071 relay, solid state, 50amp 600V. See http://fetco.com/images/Galerie/cbs-500 ... ts[27].pdf

Ira

I was thinking the same thing, Ira, but I'm not sure of the connections. The mercury relay has high voltage connections in/out plus the low voltage triggers. I might have to call Fetco.

Normally for 220 you'd need a double pole relay or two of those SSRs. I believe you could also use something like this:

https://www.grainger.com/product/DAYTON ... ctor-6GNV0

At least temporarily, depends how often it cycles.

Make sure the coil voltage is correct and that you can live with a 40 amp relay. It looks like that machine uses less than 30 amps so that should be fine and 50 amp relays cost double that.

Grainger has all common coil voltages in that package and I can't tell what it is from the information I can find. I also don't know if it's 3" height is too tall.

Ira

As luck would have it, I happen to have a spare double pole contactor and ssr from my roaster. I wonder if this would work? Would I also need the relay?

It cycles on and off during the brew cycle as fresh water is entering the tank.



I found a direct placement here:

http://www.newark.com/durakool/2035a120 ... dp/99F7248

and a few used ones on eBay:

http://www.ebay.com/itm/Durakool-Mercur ... SwwbdWN6r2

If the coil on that contractor is the required 110V, I think it should work fine. It looks like it's rated 40 amps resistive which should be plenty. But check the nameplate and make sure that's enough. I tried to find the specs for the relay but no luck. If you can see it on the roaster, measure the voltage across A1 and A2 to see what it needs. if it's 110, you're good. If it's 220, try again.

I think that SSR is not intended for ON/OFF but for speed control with a variable resistor so it's not really the proper device for this application.

Ira

Big thanks, Ira. I had an issue with the roaster when I first got it and remember measuring that voltage drop during the diagnoses and it's 220.

I think I'm going to just get the direct replacement mercury relay off eBay and make life easier. If I can get away with a $40 repair I'm happy.