Thermostat compatibility information

This Forum is about the Opentherm gateway (OTG) from Schelte

Moderator: hvxl

Thermostat compatibility information

Postby hvxl » Fri May 29, 2015 4:52 pm

This topic is intended to collect facts about how different thermostats work with the OTGW, to be consulted by people wanting to purchase a thermostat.

Please only post information here. Questions should go to some other topic. I will combine the information in one post per thermostat type.
Schelte
hvxl
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Honeywell Chronotherm Modulation T8851M1000

Postby hvxl » Fri May 29, 2015 4:54 pm

Features:
  • Supports setpoint override to .01 degrees (display rounded to .5 degrees).
  • Supports both temporary and constant setpoint override.
  • Supports clock adjustment (time and day of week only).
  • Supports display of outside temperature provided via opentherm.
The Hometronic icon is displayed when a remote setpoint override is active.

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Remeha iSense

Postby hvxl » Fri May 29, 2015 4:56 pm

Features:
  • Supports setpoint override (requires firmware version 19 or higher).
  • Supports both temporary and constant setpoint override, but needs up to 12 minutes to learn which one was requested.
  • Supports clock adjustment only at startup.
  • Supports display of outside temperature.
  • Can take advantage of Smart Power from the gateway.
Remote setpoint override is disabled by default and has to be enabled via the menu.

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Remeha Celcia 20

Postby hvxl » Fri May 29, 2015 4:58 pm

Features:
  • Supports constant setpoint override only with a resolution of .2 degrees.
  • Supports display of outside temperature.
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Honeywell Round Modulation

Postby hvxl » Fri May 29, 2015 5:00 pm

Features:
  • Supports constant setpoint override only.
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Honeywell Chronotherm Touch Modulation TH8200M1003

Postby hvxl » Fri May 29, 2015 5:01 pm

Features:
  • Supports setpoint override, but only with a resolution of 1 degree.
  • Supports display of outside temperature.
  • Does not support clock adjustment
  • Supports ventilation.
  • Supports cooling.
  • Supports display of CO2 value.
  • Supports display of Relative humidity value.
To use the Remote setpoint override, the TELE function must not be enabled.
The Hometronic icon (a "H" with a 'roof') is displayed when a remote setpoint override is active.

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Honeywell Chronotherm Vision Modulation TH8110M1003

Postby hvxl » Fri May 29, 2015 5:03 pm

Features:
  • Supports setpoint override, but only with a resolution of 1 degree.
  • Supports display of outside temperature.
  • Does not support clock adjustment.
  • Supports ventilation.
  • Supports cooling.
  • Supports display of CO2 value.
  • Supports display of Relative humidity value.
Remote setpoint override must be enabled via the menu. The TELE function must not be enabled at the same time.
The Hometronic icon (a "H" with a 'roof') is displayed when a remote setpoint override is active.

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Honeywell Wireless CMT957M1011

Postby hvxl » Fri May 29, 2015 5:04 pm

The CMT957M1011 is actually a CMS927B(1015) control unit combined with a R8810A1018 OT relay box. (Thanks to D_Hailsham for figuring out and sharing these details.)

Features:
  • Does not support setpoint override
  • Always reports the room temperature as 20 degrees
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