Rheem RTGH-RH11DV Use And Care Manual page 48

Preheat or Internal Recirculation Mode
Preheat or Internal Recirculation Mode may
be used without an installed recirculation
pipe. The water heater is preheated and
protected from freezing.
Figure 27 – Preheat or Internal Recirculation Mode
bYPS Recirculation Mode with Cross
Over Valve
Cross Over Valve
NOTE: These drawings are meant to show system piping concept only. Installer is responsible for all equipment and detailing
required by local codes.
Air & Gas
Mixing
Burner
Primary heat
exchanger
Secondary heat
exchanger
Recirculation
Pump
Pressure Relief Valve
Recirculation Line
Air & Gas
Mixing
Burner
Primary heat
exchanger
Secondary heat
exchanger
Recirculation
Pump
Pressure Relief Valve
bYPS Recirculation Mode may be used with
a cross over valve assembled at the furthest
fitting
Gas
Expansion Tank
(Install according to local code)
Figure 28 – Other Piping Configuration
Gas
Expansion Tank (Install
according to local code)
AP18733 REV. 3.2.17
48