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runing hot water loop of steam boiler
rolwak Member Posts: 1
how to wire strap-on aquastat in relay switch tradeline r845 with hot water circulator pump
I am making a few assumptions here.
In the systems I normally see here it goes.
The thermostat wires to TT on the relay.
Hot power 120 volt (line) goes to #1 and #4. This powers the relay transformer and the circulator switch.
Neutral to #2
Hot (load) to circulator to #3
The next part is a little trickier. You want to use The switch at #5 and #6 in series with your aquastat switch to close the TT's on the boiler.
Run a wire from one of the boiler TT's to #5 on the 845
Run a wire from #6 to COM on the aquastat.
Run a wire from N/O on the aquastat to the other boiler TT
Leave the existing wires on the boiler TT
I would recommend an aquastat with an adjustable differential set to 10-20 degrees. This will prevent short cycling.
Post some pics if you are unsure.
"If you can't explain it simply, you don't understand it well enough"
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