Maintenance Schedules - Navien NHB-055H User's Information Manual

If hot water will not flow and you
Note
●
suspect that the boiler is frozen,
contact an authorized technician or
licensed professional.
This boiler requires very little
●
maintenance, however a qualified
technician should inspect the boiler at
the beginning of every heating season
and/or when there is a problem.

4.5 Maintenance Schedules

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