OTGW R8810/EMS-OT/EMS-iRT
Posted: Fri Dec 07, 2018 6:20 pm
Hi,
Maybe I'm stretching my luck here but I'm having some trouble with my OTGW (from Nodo).
First, my setup looks like this:
EvoHome touch~~~Honeywell R8810A----Nefit EMS-OT Converter---Bosch Easy Control adapter (OT/EMS-iRT)---Nefit EcomLine (boiler)
My original CH system used the Nefit Ecomline in combination with the Moduline thermostat. My goal was to upgrade the CH system to a multi-zone and keep the perk of a modulating (no on/off) boiler.
Multi-zone heating is realized with the EvoHome system, which works really well. The modulating part required some investigation. After some reading I got convinced that the chosen setup would work.
OT "travels" wireless to the R8810A, the Nefit converts OT to EMS and the Bosch converts EMS to iRT which the boiler "understands".
It worked right out of the box. All leds turned green and the house is warm (for several weeks now).
After i got this setup working i focused my attention on the OT communication and ordered a OTGW from Nodo.
First, as per instruction, i connected the OTGW to the R8810A (as Thermostat). Messages appear in the log window, like the "thermostat is connected" and a regular "T90800002 Write-Data Message ID 128: 2". So this looked good.
Then i connect the OTGW to the Nefit (EMS-OT as boiler). A lot of "Error 3" appeared.
After some reading of what to do next I flashed the "diagnose.hex" on the OTGW and performed the nr. 2 and 3 test.
The #2 test showed the expected behavior (like 500 and 1000 microsec. timings). The #3 test did not so good. Timings varied between some microsec. to up to 7500 microsec. Also some errors were reported.
Something seems to go wrong on the boiler side (which probably has something to do with my "double conversion" setup).
Now i'm stuck on how to proceed. Clearly without the OTGW the installation works. With the OTGW it fails.
Any thoughts are appreciated.
TIA,
Jack
Maybe I'm stretching my luck here but I'm having some trouble with my OTGW (from Nodo).
First, my setup looks like this:
EvoHome touch~~~Honeywell R8810A----Nefit EMS-OT Converter---Bosch Easy Control adapter (OT/EMS-iRT)---Nefit EcomLine (boiler)
My original CH system used the Nefit Ecomline in combination with the Moduline thermostat. My goal was to upgrade the CH system to a multi-zone and keep the perk of a modulating (no on/off) boiler.
Multi-zone heating is realized with the EvoHome system, which works really well. The modulating part required some investigation. After some reading I got convinced that the chosen setup would work.
OT "travels" wireless to the R8810A, the Nefit converts OT to EMS and the Bosch converts EMS to iRT which the boiler "understands".
It worked right out of the box. All leds turned green and the house is warm (for several weeks now).
After i got this setup working i focused my attention on the OT communication and ordered a OTGW from Nodo.
First, as per instruction, i connected the OTGW to the R8810A (as Thermostat). Messages appear in the log window, like the "thermostat is connected" and a regular "T90800002 Write-Data Message ID 128: 2". So this looked good.
Then i connect the OTGW to the Nefit (EMS-OT as boiler). A lot of "Error 3" appeared.
After some reading of what to do next I flashed the "diagnose.hex" on the OTGW and performed the nr. 2 and 3 test.
The #2 test showed the expected behavior (like 500 and 1000 microsec. timings). The #3 test did not so good. Timings varied between some microsec. to up to 7500 microsec. Also some errors were reported.
Something seems to go wrong on the boiler side (which probably has something to do with my "double conversion" setup).
Now i'm stuck on how to proceed. Clearly without the OTGW the installation works. With the OTGW it fails.
Any thoughts are appreciated.
TIA,
Jack