Navien NHB-055 Installation & Operation Manual page 72

PCB DIP switch setting (DIP SW 2, set of 8)
Is switch #1 set correctly for Return Water Control (ON) or Supply Water Control (OFF)?
If continuous boiler operation is required, is switch #7 in the up (ON) position?
If high temperature venting has been installed (CPVC or polypropylene), is switch #8 in the up (ON) position?
Front Panel DIP switch setting (DIP SW 1, set of 10)
Is switch #2 set correctly for Celsius (ON) or Fahrenheit (OFF)?
Is switch #4 and #5 are set correctly for the installation altitude?
Front Panel DIP switch setting (DIP SW 2, set of 2)
Is switch #2 set correctly for natural gas (OFF) or propane gas (ON)?
Operating the boiler
Have you given the Installation & Operation Manual and User's Information Manual to the owner for future reference?
Have you shown the owner how to shut off the gas in case of an emergency?
72 Installation Checklist
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