Test the Burner Transformer
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.
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 the circuit breaker to off.
2. Remove the screws retaining the transformer (Figure 2, Item 3), and flip the transformer back.
3. Remove screw retaining burner primary control (Figure 2, Item 1) and remove burner primary control.
4. Tag and disconnect the wiring (Figure 2, Item 2).
5. Use an ohmmeter to test for 90,000 100,000 ohms resistance between the two wires (Figure 2,
6. Use and ohmmeter to test for 250,000 ohms resistance between the two spring terminals (Figure 2,
7. Replace an open or shorted transformer (Figure 2, Item 3).
8. Connect wiring to the transformer as tagged.
9. Install burner primary control (Figure 2, Item 1) and retain with screw.
10. Flip the transformer (Figure 2, Item 3) back in operating position and retain with screws.
11. Connect power, and operate IAW procedures given in TM 10-3510-226-10.
12. Monitor for normal operation.