The document outlines the key features of Rinnai's JLG series gas water heaters, including micro‑computer temperature control, low‑pressure gas adaptation, and multiple safety protections such as automatic gas cut‑off, exhaust detection, anti‑freeze and over‑heat safeguards. It also describes the system’s energy‑saving functions that automatically adjust gas flow to maintain consistent water temperature.
Detailed sections cover pre‑installation checks (gas type, power connection, water supply, valve status), installation procedures, water‑filling methods, start‑up testing, and regular maintenance. Safety symbols and warnings are explained, and a self‑diagnostic feature reports fault codes on the controller for easy troubleshooting. This manual is written in Chinese.