Replace the Burner Assembly
Ensure that all electrical power to the boiler is shut off and disconnected before
proceeding. The circuit breaker box or individual circuit breaker should be locked and
tagged out by personnel following this procedure. Remember that the CBL is a wet
environment. Serious injury or death to personnel can result from electrocution if proper
safety precautions are not observed.
Ensure fuel is contained and not allowed to spill or spray into the CBL. Failure to observe
safety precautions may result in a fire, with the possibility of serious injury or death to
Allow the boiler and any associated hot water pipe, tubing or fixtures to cool at least 30
minutes before attempting any repairs. Failure to observe safety precautions may result
in serious injury or death to personnel.
Use eye protection, gloves, and a dust mask when performing this procedure. The
burner insulating amulet is fiberglass and can cause eye, skin, and respiratory system
injury to personnel if adequate precautions are not observed.
1. Disconnect power by switching circuit breaker No. 22 to OFF.
2. Remove screw retaining the burner primary control (Figure 13, Item 1) and remove primary control.
3. Tag and disconnect motor wiring.
4. Remove conduit locknut, and remove conduit (Figure 13, Item 24) from junction box.
5. Tag and disconnect fuel supply and return hoses (Figure 13, Item 12).
6. Remove the nuts retaining the burner assembly (Figure 13, Item 25) to the boiler (Figure 13, Item
26), and remove the burner assembly.
7. Ensure the insulating amulet (Figure 14, Item 27) is in place.
8. Install the replacement burner assembly (Figure 13, Item 25), and secure in place with nuts.
9. Connect the fuel supply and return hoses (Figure 13, Item 12) as tagged.