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Erie 2 wire thermostat no power after installing new Taco Zone valve Controller
tctran_jm3
Member Posts: 23
Hello and thanks in advance for any feedback.
I was running 2 Erie VL500 Zone valve controllers and ran into issues with the boards last week.
I went out and purchased 2 new Taco 6 zone valve controllers.
I have 8 zones in total with 8 thermostats. I have three (3) two wire thermostats, made by Erie and five (5) thermostats that are your standard heating / cooling thermostats. After installing the 2 new Taco zone valve controls, the 5 standard heating / cooling thermostats are working properly, but the three (3) two wire thermostats do not have any power. The two wire thermostats were working prior to installing the new zone valve controllers.
I took the cover off of the two wire thermostat and manually connected the red and white wires and the zone worked properly, opened the valve and turned on the boiler and circulator.
I don't know why the 2 wire thermostats appear to not be getting any power. The taco zone valve controller came with resistors for power stealing thermostats. I'm not sure if this is what is happening and if I should install the resistors.
thanks
Tom.
I was running 2 Erie VL500 Zone valve controllers and ran into issues with the boards last week.
I went out and purchased 2 new Taco 6 zone valve controllers.
I have 8 zones in total with 8 thermostats. I have three (3) two wire thermostats, made by Erie and five (5) thermostats that are your standard heating / cooling thermostats. After installing the 2 new Taco zone valve controls, the 5 standard heating / cooling thermostats are working properly, but the three (3) two wire thermostats do not have any power. The two wire thermostats were working prior to installing the new zone valve controllers.
I took the cover off of the two wire thermostat and manually connected the red and white wires and the zone worked properly, opened the valve and turned on the boiler and circulator.
I don't know why the 2 wire thermostats appear to not be getting any power. The taco zone valve controller came with resistors for power stealing thermostats. I'm not sure if this is what is happening and if I should install the resistors.
thanks
Tom.
0
Comments
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Is R and W reversed?
Do the Erie thermostats take batteries?0 -
Some two wire t-stats will still require the resistors between the W-C terminals on the Taco control. For some reason the Honeywell T87 need them. We will received a call that they are not working, they install the resistor and it is fine. Please give us a call Mon-Fri 8am-5pm EST if you need any assistance 401-942-8000.2
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SteveSan said:Some two wire t-stats will still require the resistors between the W-C terminals on the Taco control. For some reason the Honeywell T87 need them. We will received a call that they are not working, they install the resistor and it is fine. Please give us a call Mon-Fri 8am-5pm EST if you need any assistance 401-942-8000.0
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@tctran_jm3 I checked with the Product Engineer and he states no issue with adding the resistor if not required to.1
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There is a "watch battery" Energizer 357, under the Erie logo in a little slide tray. It doesn't get charged by the wiring, needs to be replaced occasionally.
It was a great little thermostat. The manual explains when the resistor is needed.Bob "hot rod" Rohr
trainer for Caleffi NA
Living the hydronic dream1
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