24VAC on my Aquastat?
- ShawnTRD
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Installing a new thermostat that is not battery powered so it needs 24VAC (common wire). Can I get that from my Aquastat?
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The schematic shows T terminals but I don't see them in the picture. Find the T T terminals and check them with a volt meter.
- ShawnTRD
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Yeah the top two with my old thermostat hooked to. One measure 4.** volts the other measures around 14 volts
- ShawnTRD
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Right now I have two wires in my thermostat. R (RC & R) and W
I think I need R (RC & R), W and C for the new thermostat.
I think I need R (RC & R), W and C for the new thermostat.
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- ShawnTRD
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- Posts: 519
- Joined: Tue. Feb. 04, 2014 1:04 am
- Location: Spencer, NY
- Stoker Coal Boiler: Keystoker KA6 (New in April 2014)
- Coal Size/Type: Anthracite Rice
- Other Heating: Weil Mclain WGO-2 (Net 75k BTU)
Ok so multimeter on T and T equal 27V AC. Individually they equal 3 V volts and 12 V. So which one 3 or 12 V do I put my C wire on?
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No you will need a transformer. Aquastat does not a C terminal. The "tt" is for R and W only! You could possibly smoke the aquastat if you put the c with the w.
- lsayre
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An aquastat is only a switch, just like a T-Stat. Switches pass 'hot leg' current (when they close the circuit), they do not provide it. If the T-Stat needs power the poster above is correct, it must come from a 120 VAC to 24 VAC transformer.
- ShawnTRD
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- Other Heating: Weil Mclain WGO-2 (Net 75k BTU)
I used number 2 as my 24VAC (common wire) and T & T for the switch Red and White wires. Seems to work.
- lsayre
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Apparently the L7224/L7248 is well more than just an aquastat. Does it have a transformer on board??