Why would it matter if the resistor is installed at the furnace or at the thermostat? If because of the resistance of the wire from the thermostat to the furnace, then a different value resistor may be needed to compensate. Is my reasoning incorrect?
I never thought about adding the resistor on the thermostat side. The instructions say to put them at the zone controller. There was much more room for them at the controller vs the thermostat.
I have a boiler with a taco zone controller, but I’ve read these resistors are needed in a variety of systems. What happens is the thermostat draws a small amount of current between the white and red wires, tricking the furnace/boiler into thinking there is a heat call by making a connection when there isnt one. The resistors stop that. Here’s how mine look.
Interesting. I have plenty of room inside the Centralite to put it there and will try it. I have not yet connected the C wire as I am awaiting a replacement condensation pump to arrive before crawling under the house again. Still running on the dumb thermostat for now.
I have been testing the Centralite. I have it near the older thermostat and have been monitoring the temperature readings between the two, plus a motion sensor with a thermometer a few feet away. The Centralite needed a +3 degree adjustment to match the other two units. This is probably at least a part of the problem.
The only thoughts i have on why the resistor shouldnt go at the thermostat is because the wireing itself has some resistance, and the length of that wire run from the furnace varies considerably from one install to another. So probably for consitent operation from one application to another, the directions recommend the resistor at the furnace/boiler.
I can’t imagine it would hurt to try the resistor out at the thermostat first though.
I at first had the temp off a few degrees- turns out the thermostat was on an exterior wall and a cold draft was coming in behind it. I stuffed up the hole where the wiring came into the thermostat with insulation, and the temperature has been much more in line with the room now.
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Put the resistor in and it made zero difference. However, something new happened (with or without the resistor). The furnace started refusing to light many times (sometimes it would). Turns out the condensation pump drain water was being sucked into the secondary heat exchanger. My HVAC guy put in a temporary solution until a new condensation pump can be had. I feel like this has been a building issue and has been the cause of my problems the entire time. I will fiddle with the resistor some more after we get the pump replaced, provided I am still having odd things happening.
EDIT: Forgot to mention I also got the C wire connected now.
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At the top of my Lovelace window, I have all my temperature sensors. I have one in the hallway, where my centralite is installed, but I would really like to add the Centralite’s temperature reading (actual, not target). Is there anyway to get to this entity, or does it not exist. I sure cannot find it anywhere (using ZHA).
I don’t have a centralite, but it’s climate entity should have an attribute current_temperature - so you can make a template sensor from that.
My State Template was wrong. Adding this fixed it:
{{state_attr('climate.centralite_3157100_centralitepearl','current_temperature')}}
Thank you! Very cool to have this finally.
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How often does your (your = everybody) Centralite temperature reading update? I have had it not update for up to 28 minutes, which doesn’t seem right. Is this normal? This is the entity named sensor.centralite_temp in my case. It’s created from a Template.
I know this is somewhat old, but just in case you didn’t find out, you can configure the swing threshold on the thermostat UI