Operating The Boiler; Measuring The Inlet Gas Pressure - Navien NCB-150E Quick Installation Manual

STEP 3 After Installing
Opening All the Valves
Gas Valve

Operating the Boiler

Power ON Adjust Temperatures
Space Heating Temperature
MODE
When the power is on, the water 1. Press the Mode button once. The
temperature of the space heating
supply will appear with the water
2. Press the + (Up) or – (Down)
pressure on the front panel display
in 5 second intervals.

Measuring the Inlet Gas Pressure

1
Open Closed
Shut off the manual gas valve.
Re-open the manual
5
gas valve and check
for leaks.
Open multiple
fixtures that have
high flow rates, such
as bathtub and
shower faucets, to
ramp the boiler up to
Открыть
its maximum firing
rate.
CAUTION
The boiler cannot function properly without sufficient inlet gas pressure. Measuring the inlet gas pressure should be performed by a licensed
professional only.
Installing the Front Cover
1
Space Heating System Valves DHW System Valves
Shut-off
valves
DHW Temperature
1. Make sure that all hot water faucets
are closed, and ensure that the
internal circulator and any external
circulating pumps are off.
MODE
2. Press the Mode button twice. The
DHW mode icon turns on.
3. Press + (Up) or – (Down) buttons
until the desired temperature
appears on the display.
Note
space heating icon turns on.
buttons until the desired
temperature appears on the
display.
2
Open a hot water
faucet. The boiler
should turn on and
the gas in the gas
supply line will be
purged.
Leave the faucet on until the boiler shuts down
due to a lack of gas supply, and then turn off the
hot water faucet.
6
Check the inlet gas pressure reading on the manometer.
2
2
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Navien, Inc.
20 Goodyear, Irvine, CA 92618
Tel: 1-800-519-8794, Fax: 1-949-420-0430
Shut-off valves
www.navien.com
View Basic Information
DHW temperature higher
than 125°F can cause 1. Press the Mode button three
scalding.
times. "INFO" will appear on the
display.
2. Press the + or – buttons to
switch between the information
types.
3
1
1
Remove the front cover by
loosening the 4 screws.
Recommended Gas Pressure Settings:
NG: 3.5"–10.5" WC
LP: 8.0"–13.5" WC
Ensure Maximum Water Flow
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After running the boiler for the first 10 minutes, turn it off and clean the cold water filter
and the space heating return strainer to remove any trapped debris.
Final Check
A trial run should be performed in accordance with the Installation checklist listed in
the boiler's Installation & Operation Manual.
4
Resetting the Boiler
MODE
If an error message appears, you can
try resetting the boiler to resolve the
problem.
If resetting does not
Note
solve the problem, refer
to the troubleshooting
section of the User's
Information Manual or
contact the service
center.
4
2
3
Loosen the screw indicated in the figure and
connect a manometer to the pressure port.
Reset the manometer to zero before use.
If not,
Gas supply
Adjust the inlet gas pressure with gas
regulator.
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MODE
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