Annual Tune Up
and Inspection
Accel CS Boiler
Page 1 of 3
Step 1 Open Front Cover
Turn off power to system and close main manual gas valve when servicing.
1.
Loosen the (4) screws holding the upper front boiler jacket access panel and set the
panel aside.
2.
Remove the (2) screws holding the jacket top cover on, tilt up and slide forward to
remove.
Step 2 Disconnect Gas Line and Burner Fan Electrical Connections
1.
Shut off gas supply. Remove the direct air intake and the associated gas valve
reference hose.
2.
Using two wrenches disconnect the flexible gas line below at the flare fitting.
3.
Disconnect electrical wiring from burner head. Models may have a single large
connector or individual connectors for fan, ignitor, and flame rod. Disconnect the
two electrical wiring connectors at the fan housing. The connector holding clips are
on the sides of the three pin connector and on the back of the four pin connector.
They are both press-to-release type. Disconnect the electrical wiring connector
connecting the wires to the top of the burner.
4.
Remove the (6) burner flange nuts holding the burner flange to the top of the heat
exchanger.
5.
Lift the burner and flange straight up about 2 inches and rotate the fan toward you.
Tilt the fan down while picking up on the burner. Lift it high enough to remove it
from the boiler. Gently loosen the refractory if it adheres to the pressure vessel.
6.
Place the burner on a flat surface with the nozzle pointing upward. Do not touch the
mesh burner head and be careful not to damage the igniter or sense rod.
Please refer to owner and installation manual for complete details.
Step 3 Clean Turbulators, Flame Rod and Burner Sight Glass
1.
Remove (6) turbulators. If they all look clean, you’re done. Otherwise twist and
clean all turbulators. Never operate the boiler without all turbulators installed.
2.
If it looks like the boiler needs to be flushed, remove the condensate trap and place
a bucket or tray below the condensate outlet and spray the furnace area with a
citric acid based cleaner and a soft brush. Then rinse thoroughly with clean water
and push back down into the tube.
3.
If the condensate trap was removed, then reinstall the trap.
4.
When using the citrus cleaner, wear eye protection and rubber gloves. Use of
cleaners containing chlorine, sodium or other acids will void the warranty.
5.
Clean the burner sight glass and double check insulation around igniter.
6.
Thoroughly clean the flame rod with scotch brite or similar cleaning pad.
Hot Surface Ignitor
Flame rod
Burner flange nuts
