Inspection And Maintenance Schedule; Annual Servicing; Maintenance Report; Maintenance Schedules - Navien NHB-055 Service Manual

8. Inspection and Maintenance Schedule

8.1 Annual Servicing

In order to maintain its safe and efficient operation, it is
recommended that the boiler is serviced annually.
CAUTION
Servicing must be performed by a qualified service agency or
gas supplier.
Inspection
Visual inspection for general signs of corrosion
●
Checking and adjusting the gas/air ratio
●
Checking Flue Gas
●
Carrying out a Water Leak Test in Operation
●
Carrying out a gas leak test in operation
●
Checking Hot Water Temperature and Flow
●
Checking Noise
●
Checking venting systems
●
Checking the PCB and Panel
●
Maintenance
Draining the boiler and cleaning the inlet water filter
●
Cleaning the Return Filter
●
Cleaning the intake air filter
●
Flushing the heat exchanger
●
Replacement of parts
●

8.2 Maintenance Report

Inspection Items
Draining the Boiler
and Cleaning the
Inlet Water Filter
Cleaning the Return
Filter
Checking the Intake
Air Filter
Flushing the Heat
Exchanger
Replacement of
Parts

Version 1.0

References Date:
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8.3 Maintenance Schedules

Daily
Monthly
Periodically
Every 6 months
End of season
months

8.4 Inspection Report

Inspection Items
Visual Inspection
for General Signs of
Corrosion
Checking &
Adjusting the Gas /
Air Ratio
Checking Flue Gas
Carrying Out a
Water Leak Test in
Date:
Operation
Carrying Out a
Gas Leak Test in
Operation
Checking Hot Water
Temperature and
Flow
Checking Noise
Checking Venting
Systems
Checking the front
panel.
Owner maintenance
Check boiler area
●
Check pressure / temperature gauge
●
Check vent piping
●
Check air piping (if installed)
●
Check air and vent termination
●
screens
Check relief valve
●
Check condensate drain
●
Check air vents
●
Test low water cut-off (if used)
●
Reset button (low water cut-off)
●
Check boiler piping (gas and water)
●
for leaks Operate relief valve
Shut boiler down (unless boiler used
●
for domestic hot water)
References Date:
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NHB Service Manual
Date:
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