Getting power on the C wire to 3m-50 thermostat


Old 10-17-11, 11:00 AM
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Question Getting power on the C wire to 3m-50 thermostat

I have bought a Filtrete 3M-50, there is already 3 wire running from the thermostat location, but..... The thermostat goes into a honeywell AT72D 1048 1 Transformer. This then passes to two valves and then to a relay, seems a strange way to run it if you ask me(but what do I know). There is no room for the C wire as there are only 2 wires at this point. How can I run the C wire to the relay(Erie Boss). I have pictures of everything and could send you a separate email if that helps.

thanks for the help,

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Old 10-17-11, 04:51 PM
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Hi Joe, set up a free account at Image hosting, free photo sharing & video sharing at Photobucket and upload the photos there. Come back here and place a link to your PUBLIC photo album and we'll take a look.

I would assume that you chose this thermostat for the Wi-Fi connection ? If you don't plan on using that, you can just run on batteries and forget about the C wire...

What terminals were the three wires going to on the old thermostat?

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