Replace the Fuel Pump
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.
1. Disconnect power by switching circuit breaker No. 22 to OFF.
2. Tag and disconnect fuel pump supply and return hoses (Figure 6, Item 12).
3. Loosen the compression nut retaining the copper fuel pipe (Figure 6, Item 13) to the fuel pump
(Figure 6, Item 13).
4. Remove the screws retaining the fuel pump (Figure 6, Item 14) to the burner and remove the fuel
5. Ensure the fuel pump coupling is in place and install the replacement fuel pump (Figure 6, Item 14).
Retain with screws.
6. Install the copper fuel pipe (Figure 6, Item 13) to the fuel pump (Figure 6, Item 14) and tighten
7. Install the fuel supply and return hoses (Figure 6, Item 12) as tagged and tighten.
8. Connect power, bleed fuel pump, and monitor for normal operation.