TM 5-4520-256-14
5-4. HEAT EXCHANGER MAINTENANCE.
This task covers:
a.
Removal
b.
Cleaning
c.
Inspection
INITIAL SETUP:
Tools Required:
Tool Kit, General Mechanics
Materials Required:
Cleaning Solvent (Item 11, Appendix E)
WARNING
Cleaning solvent, Federal Specification P-D-680, is toxic and flammable. Use only in a well-
ventilated area. Avoid prolonged breathing of fumes. Keep solvent away from flames. Do not
use-in excessive amounts. Avoid skin contact.
Equipment Conditions:
Heater unit shut down and cool.
Power cable disconnected from power source.
Air filters removed (para 3-10a).
Exhaust pipe removed (para 3-11a).
Duct assemblies removed (para 3-12a).
High temperature safety thermostat removed (para 3-27a).
Discharge temperature thermostat removed (para 3-31a).
Sightglass removed (para 3-36a).
Flame detector removed (para 3-37a).
Burner assembly removed (para 3-38a).
Combustion air hose removed (para 3-41a).
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