Operating The Boiler; Measuring The Inlet Gas Pressure - Navien NHB-055 Quick Installation Manual

STEP 3 After Installing
Opening All the Valves
Gas Valve
Closed Open
Drip rig

Operating the Boiler

Power ON
When the power is on, the boiler
supply water temperature will
appear with the water pressure
on the front panel display at
5 second intervals.

Measuring the Inlet Gas Pressure

Open Closed
1. Turn on the boiler. On the Front
Panel press the Diagnostics
Shut off the manual gas
button for over 5 seconds until
valve.
"1.PAR" is displayed.
2. Press the + (Up) button two times
to change the display to"3.OPR".
3. Press the + (Up) button until
"MAX2" is displayed.
Re-open the manual gas valve
and check for leaks.
Operate multiple zones that to
ramp the boiler up to its
maximum firing rate.
Open
Installing the Front Cover
Space Heating System Valves
Adjust Temperatures
Space Heating Temperature DHW Indirect Supply Temperature
1. Press the Mode button
once. The space heating
icon turns on.
3. Press the Mode button
2. Press the + (Up) or – (Down)
twice. The DHW heating
buttons until the desired
icon turns on.
temperature appears on
4. Press the + (Up) or – (Down)
the display.
buttons until the desired
temperature appears on the
display.
4. Press the Reset button twice
to return to normal operation
mode.
5. Run space heating. The gas in
the gas supply line will be
purged.
6. Leave the boiler on until the
boiler shuts down due to a
lack of gas supply, and then
turn off the boiler.
Check the inlet gas pressure reading on the manometer.
Shut-off Valves
View Basic Information
1. Press the Mode button three
times. "INFO" will appear on
the display.
2. Press the + (Up) or – (Down)
buttons to switch between
the information types.
Remove the front cover by
loosening the 4 screws.
Recommended Gas Pressure Settings:
N G : 3 . 5 " ~ 1 0 . 5 " WC
L P : 8 . 0 " ~ 1 3 . 5 " W C
Final Check
A trial run should be performed in accordance with the Installation checklist listed in
the boiler's Installation & Operation Manual.
4
Navien, Inc.
20 Goodyear, Irvine, CA 92618
Tel: (949) 420-0420, Fax: (949) 420-0430
www.navien.com
Resetting the Boiler
If an error message appears, you
can try resetting the boiler to
resolve the problem.
If resetting does not solve
Note
the problem, refer to the
troubleshooting section of
the User's Information
Manual or contact the
service center.
Loosen the screw indicated in the
figure and connect a manometer
to the pressure port. Reset the
manometer to zero before use.
Gas supply
If it is out of
the range,
Adjust the inlet gas pressure
with gas regulator.