17
CONDITION #2 continued …
POSSIBLE CAUSE
VERIFICATION
SOLUTION
Ignition Lead
Turn Rocker Switch “OFF.” Remove
If no continuity or damaged lead -
cover from ACC. Remove the fan
then replace wire harness assembly.
assembly on the AM-100 & -150.
(See “Procedures” section).
With an ohmmeter, check lead for
Reseal “ACC” chamber opening.
continuity. Visually check lead wire
and boot for tears, abrasions or
If continuity & lead checks
“burn spots” indicating a short circuit.
satisfactorily - proceed with
verification.
NOTE: Hi-voltage ignition lead
wiring must not contact regular
If visual check is ok perform ignition
wiring on boiler.
wire check (“Procedures”
section).
If ok proceed with verificaiton.
Spark Plug
Turn Rocker Switch & Gas Valve
If plug is ok - check gap (.100" to
Top Knob “OFF”. Remove spark
.125") and reassemble in boiler.
Use only resistive-type
plug from combustion chamber and
spark plug (Champion
visually check for ceramic cracks,
If plug is worn or ceramic cracked -
FI-21503): Replace any
carbon tracks, and wear. Attach the
replace plug.
non-resistive type plugs
ignition lead to spark plug & place
(WR-18/etc.)
plug on head of boiler. Jumper Fan
If plug shows carbon tracks or
Prove Switch (PS2). Turn Rocker
excessive carbon deposits, clean
Switch “ON” and observe the spark
plug and proceed with check.
during the ignition sequence.
Input Rate
Reassemble boiler.Turn Rocker
If boiler won’t run & you suspect
Switch “OFF” & Gas Valve Top Knob
“overfire”; check if pressure
“ON.”Turn Rocker switch “ON”
regulator adjusting screw is
(start boiler).
bottomed out. Turn screw
counterclockwise (in 1/4 turn
After boiler runs for at least 10 min. -
intervals) to decease flow rate.
check input rate according to one
After each adjustment replace
of two methods described under
pressure regulator cap before
“Procedures” section of this
turning “ON” boiler.
manual. Adjust gas valve regulator
as necessary to deliver desired
If boiler won’t run & you suspect
input rate.
“underfire”, check if adjusting screw
is topped out. Turn screw clockwise
To adjust pressure - turn OFF
in 1/4 turn intervals to increase
boiler/remove regulator cap on
flow rate. After each adjustment
gas valve. Replace regulator cap
replace pressure regulator cap
(secure) before re-starting unit and
before turning “ON” boiler.
determining effects of adjustment.
“O-Ring” seal on regulator cap must
fit securely against valve when
operating boiler. Replace old/worn
O-Ring if necessary.
