12
OperatingPrinciple(PreheatorInternalMode/bYPSRecirculationMode)
Chapter1ProductCharacteristics
Preheat or Internal Recirculation Mode may
be used without an installed recirculation
pipe. The water heater is preheated and
protected from freezing.
Preheat or Internal Recirculation Mode
Air & Gas
Mixing
Primary heat
exchanger
Burner
Secondary heat
exchanger
Recirculation
Pump
Pressure Relief Valve
Hot Water Oulet
Condensate Hose
Cold Water Inlet
Gas
Expansion Tank (Install
according to local code)
bYPS Recirculation Mode may be used with
a cross over valve assembled at the furthest
tting