SERVICING THE BURNER ASSEMBLY
Checking the Transformer:
To check the transformer it is necessary to operate the cleaner in a normal manner with water pump
operating, Burner Switch `off' and Fuel Filter Valve closed as follows:
Hinge transformer, back on its side.
Loosen Transformer locking clip enough to free transformer,
Place a small insulated handle screw drived blade across the transformer's exposed terminals
(CAUTION - Be sure to use an insulated handled screw driver to avoid shock)
Turn on Burner Switch and raise one end of screw driver blade from one terminal. A spark arc
gap of 1/2 inch indicates good transformer condition. Weak or no spark indicates loose or
broken primary connections or a replacement transformer is required.
There is only a forty-five (45) seconds interval from the time the Burner
Switch is turned "on" and the Flame Detector Control automatically termi-
nates power to the transformer.The above test must be made during this
forty-five (45) second period.The Flame Detector Control reset button
must be activated after this test, and Fuel Filter Valve opened.
Fuel Pump Pressure Adjustment:
The Fuel Pump is factory preset at 125 to 135 p.s.i. and should require no further adjustment. If,
for any reason, adjustment is necessary proceed as follows:
The slotted Adjusting Screw is located on the upper right side of the Fuel Pump when viewed
from the rear of the Burner Assembly.
Using a smell screw driver, turning adjusting screw clockwise (tightening) increases pump
pressure, counter-clockwise (loosening) decreases pump pressure.
Burner Air Adjustment:
The proper supply of air is necessary for proper and efficient burner combustion. D0 NOT attempt
to operate this equipment in a completely closed room. f used indoors, or within an enclosure,
provide an opening of at 1 east two (2) square feet for make-up air and vent cleaner exhaust to the
outside. FAILURE TO D0 SO COULD RESULT IN SEVERE OR POSSIBLE FATAL INJURY TO PERSONNEL. Adjust
air intake as follows:
The Burner is equipped with adjustable Air Gates (Bands) located on the left side of the blower
housing with a clamp type locking screw on the outer gate (band). To adjust, loosen locking
screw so outer gate may be hand rotated.
Opening the air ports increases air supply, closing ports decreases air supply. With cleaner
operating normally, fire on, close air ports until dark smoke emerges from Coil Vent Port,
SlOWly open air ports until smoke clears.
Tighten air gate locking screws to secure adjust-
See High Altitude Burner Adjustment, Page 22. .
Checking the Cad Cell:
The Cad Cell is a device that "sights" the flame; in the event of flame failure the Cad Cell will signal
the Flame Detector Control to shut down the Burner System. Nuisance shutdown of Burner System will occur
if Cad Cell face is dirty or is misaligned with sight hole in the Baffle Plate located within the air
tube assembly. These two possibilities should be checked out prior to the following procedures:
Remove Cad Cell leadwires to Flame Detector control, start Cleaner and burner in normal manner.
After Burner fires, place a temporary jumper between terminals F-F. Now connect ohmmeter across Cad
Cell leadwires, resistance should read under 1600 ohms.
Stop burner at burner switch and remove temporary jumper and check 'dark' (fire off) Cad Cell
resistance across leadwires, resistance should be greater than 20,000 ohms.