3-37. FLAME DETECTOR MAINTENANCE.
This Task Covers:
Tool Kit, General Mechanics
Cleaning Solvent (Item 11, Appendix E)
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.
Heater unit shut down and cool.
Power cable disconnected from power source.
Air filters and access door removed (para 3-10a).
Supply and return air ducts removed.
(1) Remove eight nuts (5), eight lockwashers (4), eight flat washers (3), cover (2), and gasket (2A) from
heat exchanger (1).
(2) Pull flame detector (7) from sight tube (6).
(3) Disconnect flame detector leads (8) from TB1-11 and TB1-12.
Change 7 3-116