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When Performance Counts!
Burner Maintenance
Fixed or Variable Speed Fan
Burner Maintenance
Oven exhaust fan Burner
Burner Maintenance
Burner Maintenance - WHY • SAFETY – Employees & Property
• Ensures proper operation
• Proper burner performance
• Lower long term operating costs – bleed a little /
bleed a lot
• Help ensure proper part heating, leading to cure
• Improves and maintains machine up-time
• Planned Maintenance vs. Forced Maintenance – “If it
ain’t broke, don’t fix it”
• Compare to your vehicle
Burner Maintenance Tools • Lock-out/Tag Out Procedures & Maintenance SOPs
• Trained maintenance staff
• Manometer
• Thermocouple calibrator
• Your eyes & ears
• Flashlight
• Screwdrivers & Hex keys
• Inch/Metric wrenches, sockets, ratchets
• Cleaning supplies
• Man-lift / Fork Lift work Basket
• Fall protection if required
Tools - Manometer Pressure is defined as a force per unit area - and the most accurate way to
measure low air pressure is to balance a column of liquid of known weight
against it and measure the height of the liquid column so balanced. The units
of measure commonly used are inches of mercury (in. Hg), using mercury as
the fluid and inches of water (in. w.c.), using water or oil as the fluid.
Tools - Manometer
Recommend using a 475-2-FM, Handheld digital manometer,
range 0-40.00" w.c. (9.96 kPa), max. pressure 10 psig. $135.00
Tools - Manometer • Used to check pressure differential – fans running & high fire
• Either gas to ambient – Maxon Ovenpak 400 series
• Or interior Burner air to gas pressure – Maxon Ovenpak LE
Tools – Temp Calibrator
Test/Calibrate oven
thermocouples, the oven over-
temp protection circuit and oven
temperature controllers for proper
operations.
Burner Maintenance
FILTER FOR OVEN BURNER FAN
• Reduce air-borne contaminants into the burner system
• Reduce maintenance on burners
• Maintain sufficient air supply to burner to provide correct
air/fuel combustion ratio
Burner Maintenance
OVEN BURNER FAN AIR INLET
Burner Maintenance
Clean burner combustion air fan
intakes, impellers to ensure proper
air flow into burner – affects
burner performance and output.
Burner Maintenance
Burner internal
mechanism needs
checked for cleanliness
and smooth operation
Burner Maintenance Burner Mixing Cone
Watch for a
warped or
cracked mixing
cone; can cause
burner output
and performance
issues
Burner Maintenance
Burner Mixing Cone
Housing
Centering Screws (4) 1/8” Air Gap For Cooling
Burner Maintenance Burner Mixing Cone
Adjustment
screws (4) – see
Maxon
documentation
for your burner
model for
procedures
Even gap
between mixing
cone OD and
burner housing
ID
Burner Maintenance Burner Mixing Cone
Example of a
new mixing cone
Burner Maintenance Burner Mixing Cone
Sign of a burner
issue;
mechanical, air
flow or gas
pressure tuning
Burner Maintenance Discharge Sleeve Check condition of gaskets, two
different types depending on
location/function.
Check condition of stainless steel
housing and ceramic core; replace if
worn, melted and heavily cracked
Burner Maintenance Discharge Sleeve
Burner Maintenance
Burner Maintenance • Electrical / Wiring terminals are tight
• Modulating motor lever arm connections – nut/bolt
check and adjustment
• Gas train connections
• Spark ignitor – condition and depth setting
• UV sensor
• Pressure proving switch tests – no jumper wires!!
• Oven exhaust Fan
• Circulation Fan
• Burner Fan
• High Pressure Gas
• Low Pressure Gas
Burner Maintenance • Modulating motor lever arm connections –
nut/bolt check and adjustment
Burner Maintenance • Gas train connections
Burner Maintenance • Spark ignitor components – condition and depth setting
Burner Maintenance
• UV sensor – have
a spare on hand
and clean lense
and bore sight
tube
• Test that burner
shuts off if sensor
removed
UV sensor & sight tube – check and clean sight tube to
ensure the UV sensor can see the UV light of the flame–
if the tube bore is dirty, can cause problems
Burner Maintenance
Burner Maintenance • Fan pressure proving switch tests
No jumper wires
Test switch
performance for
safety – shuts
down the burner
Oven Maintenance Schedule periodic
inspections for
powder build-up &
clean-outs
Inspect turning
vanes, flame tube
and burner box
interior surfaces
Fan housing,
impeller, shaft
bearings and
impeller shaft
Burner Maintenance Frequency Suggestions • Exterior Visual inspection – daily
• Gas train – daily
• Pressure switches – monthly
• UV sensor – monthly
• Mechanical connections – quarterly
• Wiring connections – quarterly
• Burner box interior/exterior and turning vanes - quarterly
• Burner, Flame Tube & Mixing Cone – annually or sooner
• Discharge sleeve – annually or sooner
• Reference OEM documentation and commercial part
documentation & mfg – ask questions as needed
• Develop and modify based on findings & issues
Burner Maintenance - WHY • SAFETY – Employees & Property
• Ensures proper operation
• Proper burner performance
• Lower long term operating costs – bleed a little /
bleed a lot
• Help ensure proper part heating, leading to cure
• Improves and maintains machine up-time
• Planned Maintenance vs. Forced Maintenance – “If it
ain’t broke, don’t fix it”
• Compare to your vehicle
Thank You