So I was forced to buy a new switching relay for my upstairs zone. I picked up a taco sr501. I am not sure if I have the wiring right, as the wiring diagram says that I should be seeing a green light all the time, but I am only seeing this green light when the boiler is getting up to temperature. Here's what I have and what I did:
This is the aquastat on my kaa2. https://customer.honeywell.com/resources/techlit/ ... 0-2061.pdf
This is the taco relay. http://www.pexuniverse.com/docs/pdf/102-169.pdf
From what I can decipher, from the aquastat I go from ZR(hot) to H (hot) on the sr01 then ZC(white) on the aquastat to N(white) on the sr 501. I then connect the white from the circulator to N on the sr501, then from 4(n/o) on the sr501 to the circulator (hot).
Does that make sense or do I have something backwards, because it sure seems so.
Thanks!
Switching Relay Help :)
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cabinover
- Member
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- Location: Fair Haven, VT
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You need 120VAC across H & N on your SR501.
According to the SR instructions:
ZR goes to Terminal 4
ZC goes to Terminal 3 & 5
Neutral from your 120VAC supply goes to N and the white wire for circulator.
Hot from your 120VAC goes to H on SR501
Hot (or black) for circulator goes from Terminal 6 to circulator.
Sounds like you don't have 120VAC to the unit and it's backfeeding from the aquastat.
Check each wire as written and I bet you find the problem quickly, just a matter of tracing wires. It can get confusing at times with all of the connections to be made.
Good luck!
According to the SR instructions:
ZR goes to Terminal 4
ZC goes to Terminal 3 & 5
Neutral from your 120VAC supply goes to N and the white wire for circulator.
Hot from your 120VAC goes to H on SR501
Hot (or black) for circulator goes from Terminal 6 to circulator.
Sounds like you don't have 120VAC to the unit and it's backfeeding from the aquastat.
Check each wire as written and I bet you find the problem quickly, just a matter of tracing wires. It can get confusing at times with all of the connections to be made.
Good luck!