TM 9-2320-260-34-2
17-15. PERSONNEL HEATER FLAME DETECTOR SWITCH MAINTENANCE (Contd)
b. Diassembly
1. Remove adjusting screw (2), washer (3), and spring (9) from microswitch (4) and mount (8).
CAUTION
Ceramic rod is very brittle and is easily broken; handle carefully,
2. Tilt microswitch (4) back on mount (8).
3. Invert microswitch (4) and remove.ceramic rod (1) from probe (5).
4. Remove sleeve (7) and nut (6) from probe (5). Discard sleeve (7).
c. Cleaning and Inspection
1. Inspect probe (5) of flame detector switch (17) for bends and corrosion. Remove corrosion from
probe (5). Replace flame detector switch (17) if probe (5) is bent.
2. Inspect ceramic rod (1) for chips, cracks, and breaks. Replace ceramic rod (1) if chipped, cracked,
or broken.
d. Assembly
CAUTION
Ceramic rod is very brittle and is easily broken; handle carefully.
1. Tilt microswitch (4) back on mount (8) and insert ceramic rod (1) in probe (5).
2. Position spring (9) in place and tilt microswitch (4) back into position.
3. Install washer (3) and adjusting screw (2) on microswitch (4) and mount (8). Tighten microswitch (4)
until it clicks, then continue an additional three-quarter turn.
4. Install new sleeve (7) and nut (6) on probe (5).
e. Installation
1. Install flame detector switch (17) on heater housing (16). Tighten nut (6).
2. Install two receptacle leads (12), ignition control leads (13), and blower motor lead (11) on flame
detector switch (17) with five new screw-assembled lockwashers (10).
3. Position guard (14) on heater housing (16) and install with two dzus fasteners (15).
17-38
