4
STEP 3 After Installing
Opening All the Valves
Operating the Water Heater
Measuring the Inlet Gas Pressure
Installing the Front Cover
Ensure maximum water flow
After using the first 10 minutes, please stop using it and clean the cold water filter and
recirculation water filter of any trapped debris.
Final Check
A trial run should be performed in accordance with the Installation checklist found in
the Installation Manual.
Shut off the manual gas
valve.
Opened
Closed
Open a hot water faucet to
turn on the unit.
Shut off the hot water
faucet.
Remove 4 screws of the
front cover assembly.
Loosen a screw two or three turns
and connect a manometer to the
pressure port.
Open
Open several fixtures that
have high flow rates.
Check the inlet gas pressure reading on the
manometer.
Re-open the manual
gas valve.
Adjust the inlet gas pressure with
gas regulator.
Gas supply
If not
NG : 3.5
”
~10.5
”
WC
LP : 8.0
”
~13.5
”
WC
Recommend Gas Pressure Settings:
CAUTION
The Navien water heater cannot operate properly without sufficient inlet gas pressure and volume.
The instructions on how to check the inlet gas pressure are stated above.
THIS IS ONLY TO BE DONE BY A LICENSED PROFESSIONAL.
Power ON
Adjust water Temperature
View Basic Information
Resetting the Water Heater
Temperature will appear on the
Front Panel when the power is on.
Press (+) or (-) to set the desired
temperature
Press (+) or (-) to switch the
information type.
Press Reset to solve the problem.
Setting over 125
°
F can
cause scalding
Note
If resetting does not solve the
problem, refer to the
troubleshooting section of the
Operation or contact the service
center.
Note
Pressure relief
valve
Shutoff valves
Open all the valves.
Gas shutoff valve
Navien America, Inc.
20 Goodyear, Irvine, CA 92618
Tel: (949) 420-0420, Fax: (949) 420-0430
www.navienamerica.com
