4
STEP 3 After Installing
Opening All the Valves
Operating the Boiler
Measuring the Inlet Gas Pressure
Installing the Front Cover
Final Check
A trial run should be performed in accordance with the Installation checklist listed in
the boiler’s Installation & Operation Manual.
Shut off the manual gas
valve.
Closed
Remove the front cover by
loosening the 4 screws.
Loosen the screw indicated in the
figure and connect a manometer
to the pressure port. Reset the
manometer to zero before use.
Open
Check the inlet gas pressure reading on the manometer.
Re-open the manual gas valve
and check for leaks.
Operate multiple zones that to
ramp the boiler up to its
maximum firing rate.
Adjust the inlet gas pressure
with gas regulator.
Gas supply
If it is out of
the range,
NG:3.5
”
~10.5
”
WC
L P: 8 . 0
”
~ 1 3 . 5
”
W C
Recommended Gas Pressure Settings:
1.
Turn on the boiler. On the Front
Panel press the Diagnostics
button for over 5 seconds until
“
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.
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.
Power ON
Adjust Temperatures
View Basic Information
Resetting the Boiler
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.
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.
If an error message appears, you
can try resetting the boiler to
resolve the problem.
Note
Space Heating Temperature
1.
Press the Mode button
once. The space heating
icon turns on.
2.
Press the + (Up) or – (Down)
buttons until the desired
temperature appears on
the display.
If resetting does not solve
the problem, refer to the
troubleshooting section of
the User’s Information
Manual or contact the
service center.
DHW Indirect Supply Temperature
3.
Press the Mode button
twice. The DHW heating
icon turns on.
4.
Press the + (Up) or – (Down)
buttons until the desired
temperature appears on the
display.
Shut-off Valves
Navien, Inc.
20 Goodyear, Irvine, CA 92618
Tel: (949) 420-0420, Fax: (949) 420-0430
www.navien.com
Gas Valve
Space Heating System Valves
Drip rig
Closed Open
Open
