Celcia 20 and TT command?

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Celcia 20 and TT command?

Postby jspruit » Sat Oct 17, 2015 3:37 pm

Hi,

I moved to another house which is equiped with Celcia 20 instead of Honeywell Touch which I used before. I have firmware 3.4. Unfortunately I notice that Celcia 20 does not pickup TT=... Instead you can only use TR=.... to change setpoint

My Veralite opentherm plugin currently only supports TT= and not TR=.

I read on the forum that there are changes for Celcia in new firmware 4.??. Does this new firmware also make TT command usable for Celcia?

I tried to update firmware earlier but i did not know how i could reset gateway (i have tcp/Ip to usb converter).

Thanks in advance
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Re: Celcia 20 and TT command?

Postby hvxl » Sun Oct 18, 2015 11:55 am

If my information is correct, the Celcia 20 does not resume its program on the next change when overridden via opentherm. So it effectively doesn't support TT. With the latest firmware both the TT and TC commands work the same as the old TR command for the Celcia 20.

To reset the gateway with firmware 3.4, either make a temporary short-circuit between the two contacts labeled RST, or power-cycle the gateway (leave the tcp/ip to usb converter powered on).
Schelte
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Re: Celcia 20 and TT command?

Postby jspruit » Mon Oct 19, 2015 5:41 pm

Hi,

After updating firmware and sending FT=C command I now can control setpoint Celcia with TT=, making it usable again with my Veralite.

Thanks for the support!
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