5.If true yellow tipping is observed, follow instructions TO TURN OFF GAS TO APPLIANCE (see Figure 2) and contact your installer or qualified service agency.
6.If burner flames look satisfactory, adjust thermostat to the normal setting to stop boiler firing.
D.Schedule Inspection by Your Installer or Qualified
Service Agency (Annually or at Beginning of Heating Season).
For continued safe operation either your installer, or a qualified service agency must provide a more detailed inspection of burner, heat exchanger, controls and vent system and provide maintenance as specified in Installation, Operating and Service Instructions.