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L80-029 Rev 5 10/07 10
Follow this procedure to check proper operation of the Pitco Self-Cleaning Burner System:
WARNING
Ensure that tank is filled to the level line with oil before turning the
appliance on. Turning the appliance on with an empty or partially filled tank
could cause an unsafe condition, which could lead to damage to the
appliance, property damage or personal injury.
a. Reconnect the power supply and turn on the gas supply to the appliance.
b. Energize the unit and check the gas delivery system and Pitco Self-Cleaning Burner System for
gas leaks by applying liquid leak detector or a solution of soapy water to all gas joints and
watching for bubbles at the joints.
c. If you detect bubbles at any gas joint, turn the appliance off, disconnect the power supply and turn
off the gas supply immediately. Retighten any joints that show signs of leaking and repeat steps a,
b and c until no leakage is detected. If you do not detect any leaks, proceed to step d.
d. Turn appliance on and observe its behavior. The appliance will execute a Cleaning Cycle every
time it is energized from on “OFF” state, so you may turn the appliance off and then on again to
verify proper execution of the Cleaning Cycle. Refer to the below table to verify proper Cleaning
Cycle execution
Event Duration Indication
Turn appliance “ON” N/A
Control Illuminates, pilot sparks and ignites. Pre-Purge
pulse is initiated.
Pre-Purge Pulse 2 seconds Appliance operates briefly and stops. Pilot remains lit.
Interwaiting period 1 5 seconds Appliance does not operate. Pilot remains lit.
Cleaning Pulse 6 seconds
Main valve operates, lighting main burners. SCBS valve
operates, feeding gas to the SCBS Arm. The SCBS arm
ignites, initiating a brief burn at the main burner orifice of
each burner.
Interwaiting period 2 8 seconds
The Main and SCBS valves de-energize for this period.
The pilot remains lit.
Normal operation
resumes
N/A
The appliance operates normally and begins to heat up.
The SCBS Valve remains de-energized until power to
the appliance is recycled. There is no flame on the
SCBS Arm. There is no burn at the main burner orifices.
With the Pitco Self-Cleaning Burner System installed, the appliance should behave as outlined in the above
table. A Cleaning Cycle will execute every time the appliance is turned “ON” from an “OFF” state. The thermal
cut out switch is designed to disable the appliance if the Self Cleaning Burner System malfunctions and
remains activated for an extended period of time or if there is a downdraft into the flue or a blocked flue
situation.
Follow this procedure to adjust and verify proper operation of an appliance using flue baffles
(McDonald’s models MG2 and MG2T):
WARNING
If the appliance you are upgrading is equipped with flue baffles, it may be
necessary to adjust the baffle’s opening to restore proper operation of the
appliance.
If the model you are upgrading is an MG2 or MG2T, it may be necessary to adjust the flue baffle opening to
restore proper operation of the appliance’s combustion system. Flue baffles are used when the appliance is
direct coupled to an exhaust hood, the flue baffle balances the exhaust draw on the combustion system.
When operating properly, the burners should exhibit light blue flame and generate a mild, consistent roar. It is
possible to view the burner flame on the center two burners by peeking sideways into the opening on the air
collars near the pilot. If, during operation the burner flames appear to be lifting or pulsing, the draw of the
hood may be too powerful and the baffle will need to be adjusted to a more restrictive setting. Lifting or
pulsing burners can usually be heard when the