Rheem RTGH-RH10DV Service Manual page 12

12
Operating Principle (Preheat or Internal Mode/ bYPS Recirculation Mode )
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.
bYPS Recirculation Mode with Cross
Over Valve
bYPS Recirculation Mode may be used with
a cross over valve assembled at the furthest
fitting
Chapter 1 Product Characteristics
Recirculation
Pump
Pressure Relief Valve
Recirculation
Recirculation
Pump
Pump
Pressure Relief Valve
Pressure Relief Valve
Cross Over Valve
Cross Over Valve
Recirculation Line
Air & Gas
Mixing
Burner
Primary heat
exchanger
Secondary heat
exchanger
Gas
Expansion Tank (Install
according to local code)
Air & Gas
Air & Gas
Mixing
Mixing
Burner
Burner
Primary heat
Primary heat
exchanger exchanger
Secondary heat
Secondary heat
exchanger
exchanger
Recirculation Line
Expansion Tank
Expansion Tank (Install
(Install according to local
according to local code)
code)
Gas
Gas