Key facts
- Manuals
- 3
- Languages
- EN · ZH
- Last added
- 2026-10-03
Featured Rheem manuals

Rheem GHE80ES/THE80ES GHE100ES/THE100ES Commercial High Efficiency Water Heater Use & Care Manual
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.
Covers: Safety Information · Installation Instructions · Water Supply Connections · Gas Supply · Wiring · Venting Installation
Rheem Vulcan 661/662/671 Electric Water Heater Owner's Guide
The guide is intended for both the householder and the installer of the Vulcan electric water heater. It explains safety precautions, warranty terms, and how to operate and maintain the unit.
Key sections cover safety warnings, electrical and plumbing connections, commissioning, regular maintenance, draining procedures, and the steps required to make a warranty claim. The document also includes contact information for Rheem service support.
Covers: Householder Information · Safety and Warnings · Installation Instructions · Electrical Connections · Plumbing Connections · Commissioning

Rheem KKB 50Hz 15/20/25 TON Gas Heating/Electric Cooling All‑in‑One Installation Manual
This manual provides step‑by‑step instructions for qualified service personnel to install, adjust and operate the Rheem KKB gas heating/electric cooling all‑in‑one units. It covers safety warnings, required clearances, mechanical layout, gas supply, electrical wiring, control setup, and start‑up procedures.
The document also includes system performance data, refrigerant charging curves, fault diagnostics, and recommended maintenance practices to ensure reliable operation and compliance with national codes such as NFPA‑90A/90B and the National Fuel Gas Code. This manual is written in Chinese.
Covers: Machine Parameters · Installation Overview · Installation Location · Exhaust and Combustion Air Hood · Panel Installation · Installation Clearances
Latest Rheem manuals
Rheem GHE80ES/THE80ES GHE100ES/THE100ES Commercial High Efficiency Water Heater Use & Care Manual
User Manual 36 pages · 2.7 MB · ENThe Rheem GHE80ES/THE80ES and GHE100ES/THE100ES commercial high‑efficiency water heater user and care manual provides safety, installation, operation, and…
Rheem Vulcan 661/662/671 Electric Water Heater Owner's Guide
User Manual 44 pages · 1.1 MB · ENThis Rheem Vulcan Owner's Guide provides safety, installation, warranty and maintenance information for the 661/662/671 electric water heater series.
Rheem KKB 50Hz 15/20/25 TON Gas Heating/Electric Cooling All‑in‑One Installation Manual
Installation Guide 32 pages · 8.7 MB · ZHInstallation guide for Rheem KKB series gas heating/electric cooling units (15‑25 TON, 50 Hz) with safety, wiring and commissioning instructions.
Which document do I need?
User Manual
Day-to-day operation, settings and troubleshooting. Start here if the product is already set up.
Installation Guide
Mounting, wiring and first power-up. Read it before the hardware goes in.
Questions answered in Rheem manuals
How can a gas leak be detected during installation?
Apply a soapy water solution to gas fittings; bubbling indicates a leak. Also smell near the floor for gas odor.
What pressure should the natural‑gas inlet not exceed?
The inlet pressure must not exceed 10.5 in. w.c. (2.6 kPa) for natural gas.
What voltage does the Vulcan electric water heater use?
It operates on 220 V to 240 V AC power.
From: Rheem Vulcan 661/662/671 Electric Water Heater Owner's Guide
How often should the temperature‑pressure relief valve be operated?
The valve should be operated every six months to clear deposits.
From: Rheem Vulcan 661/662/671 Electric Water Heater Owner's Guide
What safety warnings are emphasized before starting the unit?
The manual warns that ignoring the instructions can cause fire, explosion, electric shock, carbon monoxide poisoning, or personal injury, and that the unit must be installed and serviced by authorized personnel.
From: Rheem KKB 50Hz 15/20/25 TON Gas Heating/Electric Cooling All‑in‑One Installation Manual
