(b) Tag and disconnect electrical lead to
(6) With fuelinlet line connected and fuel at
the valve, place heater assembly into operation
(c) Remove assembly from heater as-
(7) Using a stopwatch, time the fuel flow
into graduated container. Flow should measure 1/2
pintin 10 to 12 minutes.
(2) Cleaning, Inspection, and Testing.
(8) If flow isnotwithin specified limits, ro-
(a) Clean igniter assembly in an approved
solvent and dry thoroughly.
(b) Visually inspect igniter ass mbly for
shorted or broken coil, cracks, corrosion stripped
or damaged terminal threads or other damage.
Rotating adjusting screw clockwise in-
creases flow rate; rotating adjusting
screw counterclockwise decreases flow
tance between igniter casing and terminal. Resis-
tance shall be two ohms.
(d) Ground igniter assembly casing and
apply 24 Vdc to terminal. Igniter coil should heat to
bright red color in a few seconds.
(e) Replace igniter assembly if it fails
either inspection or test.
Install cover plate and secure with
(3) Installation. Install igniter assembly in
reverse order of removal procedures.
Install igniter assembly electrical lead.
Terminal Board Assembly.
Install heater assembly protective cover.
Remove jumper wire from thermostat
(2) Visually inspect terminal board assembly
for insecure mounting. loose electrical connections.
stripped or otherwise damaged threads, cracks,
Flame Switch Adjustment.
corrosion, and burns or other damage.
(3) Install protective cover.
(2) Using a suitable screwdriver, rotate
flame switch adjusting screw counterclockwise
until heat er motor starts.
(3) Rotate adjusting screw clockwise until
(2) Visually inspect limit switch for cracks,
corrosion and evidence of shorting or other damage.
(4) Give adjusting screw an additional 1/2
(180 degrees) turn.
(3) Tag and disconnect electrical leads to
(5) Reinstall protective cover.
(5) Reconnect electrical leads to switch.
(6) Install protective cover.