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