Navien LCB700-21RS Installation & Operation Manual page 14

Combi 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
Expansion Vessel
Heat Exchanger
DHW Heat Exchanger
Circulation Pump
14 About the Boiler
Flue Duct
Auto Air Vent
Auto Air Vent
Cold Water Inlet
DHW Outlet
CH Return
CH Supply
Storge Tank