System 2000 + Nest Power Connector
Everything seems to work fine. The Nest "sees" the power connector and functions properly. However, after some time, the Energy Manager shows an error with a flashing 100. As far as I can tell, things are still working as they should, even though I understand that this means that every zone will open and that the boiler will heat to max setting.
What am I doing wrong? Is the NPC simply not compatible with the DEM?
Thanks in advance!
Comments
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What EK energy manager are you using? Oil, Gas and Age. the model number ofthe boiler will help to diagnose.
There are several EK personnel that frequent this site.
To use the NPC you must be able to get the both R and C of the controls transformer.
The next import question is, How many conductors ar in the thermostat wire behind the wall where the thermostat is mounted? If you have 3 or more on a heating only thermostat, you do not need the NPC.
Edward Young Retired
After you make that expensive repair and you still have the same problem, What will you check next?
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Another Question... How many thermostats (zones) are operating. The DHW counts as one, how many other space heating zones (Thermostats) do you have?
Edward Young Retired
After you make that expensive repair and you still have the same problem, What will you check next?
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Hello @stlblufan,
Seems unrelated, other than you were just there and maybe inadvertently dislodged a sensor wire and it took a while to fall off, or the sensor just happened to fail.
https://energykinetics.com/wp-content/uploads/2015/11/E-7-8-9_Dig_Mgr_Boiler_Troubleshoot.pdf
There are NEST recommendations at https://energykinetics.com/digital-manager-heating-professional/ (scroll down), although I did not find one for the NPC. I would think it would work fine.
If you truly think it is NEST related disconnect the NEST stuff and reconnect the old thermostat as a test. Maybe just connect the old thermostat right at the boiler as a test.
National - U.S. Gas Boiler 45+ Years Old
Steam 300 SQ. FT. - EDR 347
One Pipe System1 -
DHW + 4 (all of which are old-fashioned honeywell style, with the exception of the Nest).EdTheHeaterMan said:Another Question... How many thermostats (zones) are operating. The DHW counts as one, how many other space heating zones (Thermostats) do you have?
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The Energy manager may not have a large enough transformer to operate all the necessary components in the system PLUS the added load of the more than one Nest Power converter and the Neat thermostat loads. Since I am not famillair with the internal workings of the EK DEM you may need to isolate the Nest equipment from the DEM with a relay. Here is one way to accomplish this. there are others
This will resolve your issue since the RIB relay is using contacts ONLY to connect the T to the A1. All the extra load from the smart thermostat circuit(s) are isolated
Edward Young Retired
After you make that expensive repair and you still have the same problem, What will you check next?
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Flashing 100 is the temperature sensor is not functioning. Either you have a bad connection, failed sensor or you fried the sensor while attempting to connect the Nest.
My personal opinion is that you are better off with the round Honeywell thermostat. I don't think the Nest benefits the system in any way and you have better options for wifi thermostats. But that's my personal bias from dealing with Nest problems.
If you need a new temperature sensor I'm sure your EK service provider will be able to accommodate you tomorrow. Your boiler will still operate in "service board mode" until then.2 -
Still waiting to find out how many wires are in the wall behind your thermostat? Is there one wire with only 2 conductors? Is there one wire with 3 or more conductors?
Edward Young Retired
After you make that expensive repair and you still have the same problem, What will you check next?
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I suppose this is possible. I took the nest out of the equation and everything seemed to return to normal, but I understand that the monitor takes some time to try to "resolve" things before throwing a 100. So ... TBD.SuperTech said:Flashing 100 is the temperature sensor is not functioning. Either you have a bad connection, failed sensor or you fried the sensor while attempting to connect the Nest.
My personal opinion is that you are better off with the round Honeywell thermostat. I don't think the Nest benefits the system in any way and you have better options for wifi thermostats. But that's my personal bias from dealing with Nest problems.
If you need a new temperature sensor I'm sure your EK service provider will be able to accommodate you tomorrow. Your boiler will still operate in "service board mode" until then.0 -
What do you think a better option for a wifi tstat is? The sole purpose for changing to the nest is the ability to remotely monitor an often vacant property.SuperTech said:Flashing 100 is the temperature sensor is not functioning. Either you have a bad connection, failed sensor or you fried the sensor while attempting to connect the Nest.
My personal opinion is that you are better off with the round Honeywell thermostat. I don't think the Nest benefits the system in any way and you have better options for wifi thermostats. But that's my personal bias from dealing with Nest problems.
If you need a new temperature sensor I'm sure your EK service provider will be able to accommodate you tomorrow. Your boiler will still operate in "service board mode" until then.0 -
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Winner winner, somehow I fried the temp sensor and had the honor of acquiring a new one today. I still don't understand what I did wrong, though. I followed the instructions that others have successfully used. The Nest itself was happy, it "saw" the NPC and was functioning normally. I had the board off the entire time that I was making wiring changes. Maybe the transformer itself was still providing its 24V and somehow that affected the sensor during my addition of the NPC? Very confusing. Anyway....I'm back to the good ole Honeywell.SuperTech said:Flashing 100 is the temperature sensor is not functioning. Either you have a bad connection, failed sensor or you fried the sensor while attempting to connect the Nest.
My personal opinion is that you are better off with the round Honeywell thermostat. I don't think the Nest benefits the system in any way and you have better options for wifi thermostats. But that's my personal bias from dealing with Nest problems.
If you need a new temperature sensor I'm sure your EK service provider will be able to accommodate you tomorrow. Your boiler will still operate in "service board mode" until then.
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stlblufan the installation of a WI-FI thermostat should not interfere with the return sensor on the manager. If you would like to try to install the Nest power connector you can use this diagram to help you. If you go with a differant thermostat please feel free to contact me at the factory 1-800-323-2066 to answer any questions.
John Ringel Energy Kinetics1 -
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