Burner - Navien NCB300-28K Service Manual

4.7.8 Burner

Item
Function
Fault
Symptoms
Error codes
Diagnostics
44 System Details
1. Pre-mixes air and gas to reduce emissions and increase efficiency.
2. The burner produces the optimum air/gas mixture required to produce the correct level of heat during
combustion.
1. Unable to initiate or sustain combustion.
2. Dust or soot deposits form on the burner's surface.
3. Gas leakage from the burner.
1. Abnormal combustion.
2. Unstable flame conditions and / or flame loss.
3. Ignition failure.
E003, E004, E012
Visual inspection: Check for deposits forming on the burner surface and / or unstable flame conditions
during operation.
Fuel gas supply
Description
Burner Body
(Gas/air mixture and combustion zone)
Combustion air supply