The Rheem GHE80ES/THE80ES and GHE100ES/THE100ES commercial high‑efficiency water heater user and care manual provides safety, installation, operation, and…
This manual covers important safety information for the commercial high‑efficiency water heater, including warnings about gas leaks, flammable vapors, and proper venting to prevent fire or explosion. It emphasizes that installation, service, and maintenance must be performed by qualified personnel and outlines the required safety precautions.
The guide details installation steps such as water and gas supply connections, wiring, venting configurations, and thermal‑expansion control. It also explains how to set and adjust water temperature, operate the unit, perform routine maintenance, troubleshoot common issues, and obtain service assistance.
| Maximum water temperature setting | 185 °F (85 °C) |
|---|---|
| Factory‑set water temperature | 120 °F (49 °C) |
| Maximum natural‑gas inlet pressure | 10.5 in. w.c. (2.6 kPa) |
| Relief valve pressure rating | 150 psi (1034 kPa) |
Apply a soapy water solution to gas fittings; bubbling indicates a leak. Also smell near the floor for gas odor.
The inlet pressure must not exceed 10.5 in. w.c. (2.6 kPa) for natural gas.
A top and front clearance of 24 inches (61 cm) is recommended for inspection and servicing.
This manual explains 13 error codes. Open a code for its meaning, causes and what to do: