The BC-90Q-1H (often referenced as part of the BC-901H series) is a bathroom remote control used with Hong Kong Town Gas (TGC) instantaneous gas water heaters, such as models TRJW162TFQL and TRJW222TFQL.
Some BC901H units support USB or OTA (over-the-air) updates. tgc bc901h manual
Pre-heat Circulation: Activates a pre-heating function (if the heater supports it) to ensure hot water is available immediately at the tap. Safety and Troubleshooting The BC-90Q-1H (often referenced as part of the
⚠️ Note: If your TGC BC901H is a different variant (e.g., a medical device or automotive tester), some parameters may differ. Always verify the model number on the back panel. a medical device or automotive tester)