docs: for PR #4993

ACKNOWLEDGEMENTS.md

@@ -782,3 +782,4 @@ Further device support has been made with the assistance of users. Please consid
 - [lboy](https://github.com/lboy) for contributing support for Krisbow Sync 36W dehumidifier.
 - [uhodav](https://github.com/uhodav) for contributing improvements to Ukrainian translations.
 - [casualg1t](https://github.com/casualg1t) for contributing support for Poolex JetLine Premium FI pool heat pump.
+- [remarkable-bit](https://github.com/remarkable-bit) for contributing support for Elitech ECS-974T thermostat.

DEVICES.md

@@ -257,6 +257,7 @@
 - EARU Electronic K6H-3A-W thermostat
 - Elko EKO07262 thermostat
 - EleChico CCST6001 thermostat
+- Elitech ECS-974T refrigeration thermostat
 - Emmeti Zona thermostat
 - Engo E901WiFi thermostat
 - Essentials Wall thermostat