MODERN BURNER UNIT (MBU)
UNIT MAINTENANCE PROCEDURES
Replace Ignitor. Replace the ignitor every 2000 Hrs of operation or whenever recommended as part of a
Do not attempt service procedures on a burner that has recently been in operation. Let
the burner cool down before performing these procedures to avoid the possibility of
Remove Fuel Delivery Block (1) from burner tube mounting shafts as described earlier.
Disconnect ignitor power lead (2).
Loosen ignitor retainer screw (3) and remove ignitor (4) and bracket from the fuel delivery block (1).
When replacing the nozzle, be careful not to damage the ignitor.
Install new ignitor assembly (4), and tighten the retainer screw (3).
Connect the ignitor power lead (2).