Question about Robertshaw replacement furnace valve - Fiberglass RV


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Old 10-10-2015, 03:27 PM   #1
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Name: Roy
Trailer: 1977 Trillium 4500
Nova Scotia
Posts: 41
Question about Robertshaw replacement furnace valve

Hi All, I just received a new Robertshaw valve for my furnace. I cross referenced the original duo therm number 41-0475 to 710-501 (robertshaw) but after receiving the new valve there is no where to screw my thermopile into? The place where I think it should screw in has a wire connector there (the wire that runs from the t/stat hookup area to the top of the valve. My original valve had a wire running from there but went inside the valve. I am thinking I need to purchase and install a thermopile with electric leads instead of the coaxial cable type that is presently being used? Any help or suggestions would be greatly appreciated!
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Old 10-19-2015, 08:22 AM   #2
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Name: Roy
Trailer: 1977 Trillium 4500
Nova Scotia
Posts: 41
Turned out it did need a two lead thermopile, had more issues so I gave up and ordered a Olympian Wave 6 catalytic heater, much more efficient so I have read, unfortunately wasted almost $400 trying to get the old clunker going, they do say live and learn and I learned not to bother trying to fix something you can't get proper replacement parts for.
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Old 10-19-2015, 10:32 AM   #3
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Name: Dave W
Trailer: Trillium 4500 - 1977, 1978 (2), 1300 - 1977, 1973, and a 1972
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Roy,

I am sorry you have had a bad experience with servicing your furnace. I am not sure you got the correct valve. It is my understanding that the valve in a Trillium 4500 is a 41-0640.
http://www.fiberglassrv.com/forums/d...kchart1of2.pdf

This is for both the 1300, (65810-2) and the 4500 (65512-2) version. The 1300 orifice is part number, 41-0450. The orifice for the 4500 version says NLA (no longer available). I am assuming that the orifice is in the burner, so not an issue.

This Robert Shaw valve claims to be the direct replacement for the 41-0640:
Robertshaw® 710-201 Unitrol Gas Valve 710 Series 7000SLC Right Valve® Equivalent

Well not exactly direct. The ports are in different places, so some tube bending would be required to install.

Trillium / Outback replaced the valve on my first 4500, and did a bunch of other stuff, on my furnace. But, since I have six Trilliums, (all will have a furnace) and at least one of my 4500's needs a new gas valve, I will also be attempting this procedure.
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Old 10-19-2015, 02:58 PM   #4
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Name: Roy
Trailer: 1977 Trillium 4500
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Hi David, sent you a PM
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