Navien NPE-180A2 Installation Manual page 26

After installing the water heater, clean the inlet
●
water filter that is located inside the cold water
inlet, and then test the water heater for proper
flow and inspect for leaks. Instruct the water
heater owner that the filter must be cleaned
periodically to maintain proper water flow.
The following is a typical water piping example
●
for NPE-180A2/210A2/240A2 models.
Union
Full port
Gas Valve
Gas Supply
Hot Water Supply
Recirculation Line
[NPE-180A2/ 210A2/ 240A2]
The following is a typical water piping example
●
for NPE-150S2/180S2/210S2/240S2 models.
Full port
Gas Valve
Pressure
Gas Supply
Relief Valve
Shutoff Valve
Cold Water
Supply
Condensate
Drain
Cold Water
Supply
Check Valve
Expansion
Tank
Union
Condensate Drain
[NPE-150S2/180S2/ 210S2/ 240S2]
Installing the Water Heater
Pressure
Relief Valve
Shutoff
Valve
Hot
Water
Supply
25