Navien NP-180, Service Manual

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For reasons of safety and economy, it is recommended that the water heater
is serviced annually.
Services performed once a year are shown below.
- 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 remote controller
CAUTION
Servicing must be performed by a qualified service agency or gas supplier.
10. Inspection and maintenance Schedule
10.1. Inspection Report
Inspection
- Draining the water heater and cleaning the inlet water filter
- Cleaning the Return Filter
- Cleaning the intake air filter
- Flushing the heat exchanger
- Replacement of parts
Maintenance