Navien NPE-180A2 Installation Manual page 10

Exhaust Duct
Vent Installation
Detector (VID)
Intake Air Duct
Exhaust Limit
Temperature Sensor
Intake Air Filter
Fan Motor
Exhaust Body
Burner High Limit Fuse
Ignition Transformer
Burner
Single Venturi
Igniter/Flame Rod
Primary Heat
Exchanger
Gas Pipe
Secondary Heat
Exchanger
Air Pressure Sensor
(APS)
Front Panel
Condensate Trap
PCB Box
Gas Valve
Water Adjust Valve
(Built in Flow Sensor)
Mixing Valve
DHW Supply Fitting
Water Inlet Filter
Cold Water Inlet
Gas Inlet Fitting
Fitting
Condensate Drain
Cap
[NPE-150S2]
10 About the Water Heater