CSA RA 350 - System Does Not Attempt to Ignite

Form I-RA/D 350/500, P/N 131090R12, Page 43
Chart No. 3 - Thermostat is calling for heat. Burner motor runs for
about 30-45 seconds. System does not attempt to ignite.
First, check combustion chamber for excess oil.
NOTE: After ignition control is reset, you will have
30 SECONDS to perform the tests shown below
before the controller locks out.
Reset ignition control:
Press the BUTTON and hold
for four seconds. DO NOT RESET MORE THAN
ONE TIME.
Transformer and Electrode Checks:
Measure voltage between transformer/primary
lead and neutral connection. Check transformer,
insulators, and electrodes.
The secondary terminals of a good transformer
deliver 5000 volts arc to ground, for a total of
10,000 volts between terminals. Measure this
with a transformer tester or use a well insulated
screwdriver to draw an arc across the two
springs. This should be at least 3/4” in length.
Check each secondary output terminal by draw-
ing a strong arc between the spring and base. If
the arc is erratic, weak, or unbalanced between
the two terminals, replace the transformer.
Replace electrodes when the tips become worn
or eroded.
Replace any insulators that are questionable.
Transformer failures and ignition problem can
be caused by the following:
• Excessive gap on the ignition electrodes.
Gap should be 3/32”.
• High ambient temperatures
• High humidity
• Carbon residue on the porcelain
bushings
• Low input line voltage
• Arcing between the ignition electrodes
and the transformer springs. They must
have good contact.
• Carbon residue, moisture, crazing or pin
holes on the insulators
• Improper positioning of nozzle in relation
to the radius of the end cone
• Carbon residue on electrode parts
Is ignition
transformer producing
spark?
Is
electrode position
correct?
Check oil delivery
system.
Is pressure of
compressed air as
required?
Replace air pressure
switch located in the
main junction box.
Remove air
filter and
operate the
burner motor.
Install new
air filter.
Are there
leaks in the air
connections or
lines?
Replace air tubing
and tighten
connections.
Rebuild
compressor.
Adjust
electrodes.
Are
electrodes and
insulators OK?
Replace ignition
transformer.
Replace electrode
assembly.
Replace ignition
controller.
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES NO
YES
NO
Check for 115V
across Terminals 8 and 11.
Is voltage read?
(Above applies to Size 500 mfgd beginning 1/2005.
For a Size 500 mfgd before 1/2005,
check for 230V across
Terminals 15 and 11.)
Check for 115V
across Terminals 12 and 11.
Is voltage read?
(Above applies to Size 500 mfgd beginning 1/2005.
For a Size 500 mfgd before 1/2005,
check for 115V across
Terminals
R and S.)
Check for 115V
across Terminals 12 and 11.
Is voltage read?
(Above applies to Size 500 mfgd beginning 1/2005.
For a Size 500 mfgd before 1/2005,
check for 115V across
Terminals
R and S.)