Webster SC Series Installation, Startup, Operation And Maintenance Manual page 29

i. Check safety limits, including pressure and
temperature switches.
6. Combustion Air Fan
If the fan and motor are ever removed, the following
should be observed in re-assembly.
a. There should be 1/16" overlap of inlet cone and fan.
b. Never re-use the fan to motor shaft set screws,
always use new screws of the same type and style
to maintain balance and fan retention.
c. When tightening the fan hub set screws, rotate the
fan to place the screws on the bottom. This way the
screw is not lifting the fan.
d. The motor shaft and fan hub must be clean and free
of burrs.
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SC Manual
6 - Inspection and Maintenance Schedule
Component / Item
Burner Flame Visual inspection of burner flame.
Air Damper Visual inspection for smooth and free travel.
Fuel Metering Valves Visual inspection for smooth and free travel.
Draft Controls (Stack) Visual inspection for smooth and free travel.
Gas Fuel Pressure Record in log book, compare trends.
Oil Pressure Record in log book, compare trends.
Atomizing Air Pressure Record in log book, compare trends.
Pilot Visually inspect pilot flame, check and record flame signal strength if metered.
Flame SafeGuard - Pilot Close manual fuel valve on pilot during cycle and check for safety shutdown,
Test recording time.
Flame SafeGuard - Main Close manual fuel valve on pilot during cycle and check for safety shutdown,
Flame recording time.
Flame SafeGuard Check flame safeguard components, including scanner.
Flame SafeGuard Replace flame safeguard components in accordance with manufacturers
instructions.
Pilot Turndown Test Conduct pilot turndown test annually or after any component change.
Hot Refractory Test Conduct hot refractory hold in test. This test is required annually or after any
component change.
Oil Pressure and Tem- Check oil pressure and temperature switch for smooth operation and correct
perature Interlocks action.
Atomizing Air Pressure Check air atomizing pressure interlock switch for smooth operation and cor-
rect action.
Interlock Controls Check other interlocks that may be used on the burner for smooth operation
and correct action.
Firing Rate Control Check firing rate control and verify settings.
Combustion Tuning Conduct a combustion test, verify setting and NOx emission levels.
Pilot and Main Fuel Valves Make visual and manual check for proper sequencing of valves.
Pilot and Main Fuel Valves Check all coils, diaphragms, interlock switch & other parts of all safety shutoff
valves.
Pilot and Main Fuel Valves Perform leak tests on all safety shutdown control valves.
Low Pressure Air Switch Test low air pressure switch for proper operation and adjustment.
Mod Damper Switch Check damper low fire proving switch per manufacturers instructions.
Combustion Air Fan Clean combustion air fan and housing
Burner Components Visually check the burner components for signs of cracks, deformation, slip-
page or other unusual indication.
Burner Mounting Check burner mounting clamps and brackets for tightness.
Refractory and Seals Check burner refractory for cracks or signs of leakage.
Oil Nozzle Check and clean oil nozzle.
Air Compressor Check air compressor for lubrication oil and air filter.
Air Compressor Check air compressor relief valve operation.
7. Ignitor Replacement
To remove the ignitor on the SC series from the
combustion head start by removing the housing cover
plate. Then use a 7/16" crowfoot wrench on a 24" (or
longer) extension to remove the ignition shoe from the
ignitor. Change the crowfoot out for a 9/16" socket and
unscrew the ignitor. Use a 3/8" baby crowfoot wrench to
guide the spark plug from the ignitor collar.
In order to put the spark plug back in place, place the
ignitor in the 7/16" socket and then put the ignitor in place
by pushing it all the way in. Secure the position of the
spark plug by tightening the compression fitting with the
7/16" socket. Use the crowfoot wrench to put the ignition
shoe back onto the spark plug.
Recommended Action or Test
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General Maintenance And Care