TM 9-4520-272-14&P
0054 00
SERVICE - CLEAN THE HEAT EXCHANGER
1. Remove burner back plate as described in WP 0050 00.
2. Remove burner cone as described in WP 0051 00.
3. Vacuum large cone deposits from bottom of heat exchanger.
4. Use a long, thin brush to brush the inside surfaces of the heat exchanger.
5. Vacuum carbon brushed from heat exchanger surfaces that will fall to the bottom of the heat
exchanger.
6. Install burner cone as described in WP 0051 00.
7. Install burner back plate as described in WP 0050 00.
NOTE
After cleaning heat exchanger it is not unusual to see a small amount of light smoke
when unit is started. The smoke should clear within 30 minutes. If smoke is heavy and
black after cleaning heat exchanger, shut unit off and troubleshoot for excessive fuel or
low combustion airflow.
0054 00-5
