Navien Flame Inspection Window 30028670A

The Navien flame inspection window, part 30028670A, is a sight glass assembly fitted to the combustion chamber of Navien NCB-CE and NPE-AWE/SWE appliances. It allows an engineer to observe the burner flame directly during commissioning, servicing and fault diagnosis without breaking the combustion seal. The window forms part of the combustion chamber front cover arrangement on these models.

• The glass is cracked, chipped or crazed, compromising the combustion seal
• Heavy sooting or staining on the glass obscures the burner flame
• Condensation or moisture is trapped behind the glass
• The window seal is perished, hardened or visibly damaged
• The retaining fixings or surround are corroded or distorted

• Confirm your appliance model and serial number against the fit list above
• Check the existing window, seal and retaining fixings for damage before ordering
• Verify the part number marked on the existing component matches 30028670A
• Confirm whether the seal is supplied with the window or must be ordered separately