ARMY TM 9-6115-464-12
AIR FORCE TO 35C2-3-445-1
NAVY NAVFAC P-8-624-12
Heater Assembly Operational Testing. Refer to paragraph 2-22 and operate the heater assembly to determine
if heater is operational.
Regulator Valve Assembly Fuel Flow Check and Adjustment.
Service regulator valve assembly screen, sintered filter, and metering orifice assembly (paragraph
5-7b. above). Do not install burner fuel line or protective cover.
Tag and disconnect electrical lead to igniter assembly (Figure 5-4).
Remove screws and cover plate to expose brass adjusting screw.
Connect one end of burner fuel line onto metering orifice assembly and position the other end to drain
into a graduated container.
Install a jumper wire across terminals of thermostat switch (37, Figure 5-1).
With fuel inlet line connected and fuel at the valve, place heater assembly into operation (paragraph
Using a stopwatch, time the fuel flow into graduated container. Flow should measure 1/2 pint in 10
to 12 minutes.
If flow is not within specified limits, rotate adjusting screw (Figure 5-4) to obtain proper flow rate.
Rotating adjusting screw clockwise increases flow rate; rotating adjusting screw
counterclockwise decreases flow rate.
Stop heater assembly operation (paragraph 2-22).
(10) Install burner fuel line (Figure 5-4).
(11 ) Install cover plate and secure with screws.
(12) Install igniter assembly electrical lead.
(13) Install heater assembly protective cover.
(14) Remove jumper wire from thermostat switch.
Flame Switch Adjustment.
Remove protective cover (Figure 5-4).
Using a suitable screwdriver, rotate flame switch adjusting screw counterclockwise until heater mo-
Rotate adjusting screw clockwise until motor stops.
Give adjusting screw an additional 1/2 (180 degrees) turn.
Reinstall protective cover.