Navien LCB700-21RS Installation & Operation Manual page 13

External Model
The following diagram shows the key components of the boiler. Component assembly diagrams and particular parts lists are included in
the Appendixes.
Oil Burner
Main Controller
Front Panel
Heating Supply
Temperature
Sensor
Heat Exchanger
Expansion Vessel*
Condensate Trap
Key Hole
* The expansion vessel and circulation pump are not included in the regular model.
Flue Duct
Auto Air Vent
Heating Supply
Heating Return
Flue Temperature Sensor
Air Pressure Sensor
Pressure Sensor
Pressure Relief Valve
Circulation Pump*
About the Boiler 13