Combustion Research Omega II, Installation, Operating, Maintenance And Parts Manual

Page: 39 / 50

Omega II
®
Installation, Operation & Maintenance
Combustion Research Corporation Page 35
Does the burner ignite?
Does the burner stay on?
NO
Is the flame sensor wire
loose or sensor porcelain
damaged?
Replace or repair
damaged component.
YES
Is the ground wire from
the terminal on the
ignition control grounded
to the burner body?
NO
Replace ground wire.
NO
YES
Is the flame signal
steady
and 0.7 micro
amps or greater?
NO
Is the inlet gas pressure
during ignition correct?
NG - 7.0" / LP - 11.0"
Check gas lines and
manual valves. Is inlet
gas piping sized
correctly?
NO
Is there 24 volts on valve
terminals during ignition?
YES
Is there 24 volts at the
terminals on the ignition
control?
NO
YES
Is there gas pressure
at the manifold
pressure tap?
NG
- 3.5",
LP - 10.0"
Check gas orifice for
blockage & proper size.
YES
Replace gas valve.
NO
Adjust supply gas pressure
to proper levels. (see name
plate)
YES
Repair or replace gas
piping to correct size.
NO
YES
Does the burner shut off
when the temperature is
satisfied?
YES
NO
Replace thermostat.
END OF TROUBLE
SHOOTING
YES
Check wires and replace
as needed.
YES
Replace ignition control.
NO
Is the "ON / OFF" knob on
the valve in the open or
"ON" position
YES
Replace ignition control
if flame is not sensed.
YES
Clean spark and flame
sensor assembly. Replace
if necessary.
NO
Is there spark at the
igniter after a 30
second pre purge?
NO
Remove power from
burner and check igniter
and ignition cable. Are
they damaged?
Replace igniter or
ignition cable as needed.
YES
Is the igniter spark gap
set at 1/8"?
NO
Carefully reset gap to
1/8"
YES
YES
Replace ignition control.
1
YES