Navien NBH Series, User'S Information Manual

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16 Maintaining the Boiler
Service technician (See the following instructions)
Annual Start-up
General:
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Address reported problems.
Ɣ
Inspect interior; clean and vacuum if
necessary.
Ɣ
Clean condensate trap and fill with
fresh water.
Ɣ
Check for leaks (water, gas, flue,
condensate).
Ɣ
Verify flue and air lines in good
condition and sealed tight.
Ɣ
Check system water pressure/system
piping/expansion tank.
Ɣ
Check control settings.
Ɣ
Check ignition and flame rod (clean and
reposition).
Ɣ
Check wiring and connections.
Ɣ
Inspect flame (stable, uniform).
Ɣ
Inspect flame signal.
If combustion or performance indicate
need:
Ɣ
Flush heat exchanger.
Ɣ
Remove and clean air intake filter.
Ɣ
Remove and clean space heating
strainer.
Ɣ
Remove and clean inlet water filter.
4.5 Maintenance Schedules
Regular maintenance is required to operate the boiler safely. Refer
to the maintenance schedules below for proper maintenance of
the boiler.
Owner maintenance
Daily
Ɣ
Check the boiler area is free of
combustible/flammable materials and
air contaminants.
Ɣ
Check the pressure/temperature
gauge for signs of higher than normal
pressure.
Monthly
Ɣ
Visually inspect the vent piping for
signs of leakage and blockage.
Ɣ
Visually inspect the burner flames.
Ɣ
Inspect the condensate trap and the
PVC fittings.
Periodically
Ɣ
Test the LWCO for proper operation.
Every 6 months
Ɣ
Inspect boiler piping (gas and water)
for leaks.
Ɣ
Test to make sure the relief valve is
operating normally.
Non-heating
season
Ɣ
Shut boiler down (unless boiler is used
for domestic hot water).