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Nest Power Connector Help

ncatanza05
Member Posts: 1


my issue is that the thermostat wires were not originally wired into the TT terminals so all of the other wiring needs to be redone. Below is a photo of what the wiring looked like before the power connector was added and another of after it was connected and the remaining wires I need to find a home for.
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Comments
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get rid of the nest power connector. The only way to make a nest work reliably is wit a seperate transformer and relay see the attached0
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What’s wrong with the C terminal on the relay. Might need a 1k, 1/2 watt resistor
There was an error rendering this rich post.
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It looks like he only has 2 conductors to the t-stat.STEVEusaPA said:What’s wrong with the C terminal on the relay. Might need a 1k, 1/2 watt resistor
@ncatanza05 The "5 COM" terminal is not a transformer common.
If you can give us a little more info about your system and how many wires you have going where, we should be able to offer some assistance. What are the white wires in the first picture going to? How many circulators? Is the aquastat the boiler temp? Is the hot water heater an indirect?"If you can't explain it simply, you don't understand it well enough"
Albert Einstein0 -
8.33 lbs./gal. x 60 min./hr. x 20°ΔT = 10,000 BTU's/hour
Two btu per sq ft for degree difference for a slab0 -
What’s this?Zman said:
It looks like he only has 2 conductors to the t-stat.STEVEusaPA said:What’s wrong with the C terminal on the relay. Might need a 1k, 1/2 watt resistor
@ncatanza05 The "5 COM" terminal is not a transformer common.
If you can give us a little more info about your system and how many wires you have going where, we should be able to offer some assistance. What are the white wires in the first picture going to? How many circulators? Is the aquastat the boiler temp? Is the hot water heater an indirect?
There was an error rendering this rich post.
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That is the one for the transformer, there is no wire landed on it. I am curious/concerned about the safeties wired into the taco."If you can't explain it simply, you don't understand it well enough"
Albert Einstein0 -
I think it's only a 10 va transformer in there so connecting one thermostat might be ok, but a separate transformer and isolation relay is the only real way to do it IMO.0
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That's why I like argo's documentation. It explicitly tells you to use an isolating relay to have proper power for your smart thermostat: https://argocontrols.com/products/switching-relays-accessories/ir882-isolation-relay-3-zonesHVACNUT said:I think it's only a 10 va transformer in there so connecting one thermostat might be ok, but a separate transformer and isolation relay is the only real way to do it IMO.
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