MODEL 200-AO
(continued)
Checking the Cad Cell:
c)
If Cad Cell resistances differ from above. recheck wiring, sight alignment, or for dirty Cad Cell,
Part No. 1175-42-05. Reconnect Cad Cell leadwires.
Checking the Flame Detector Control:
If the Cad Cell tests Indicate a properly functioning Cad Cell, check the Flame Detector Control as
1.
follows:
Turn Burner Switch to off position, depress reset button on Flame Detector Control and remove the
a)
Cad Cell leadwires from the terminals F-F.
b)
Attach one lead of a 2000 ohm resistor (of any wattage value) to one `F' terminal. Start cleaner
in normal manner and turn on burner switch. As soon as flame is established, attach the other lead
of the 2000 ohm resistor to the other ` F' terminal.
NOTE:
The 2000 ohm resistor must be attached to the `F' - `F' terminals within 8 seconds
after flame has been established or Flame Detector Control will lock out on safety
and shut down burner operation.
c)
If the Flame Detector Control still locks out on safety and terminates burner operation, the Flame
Detector Control must be replaced, Part No. 1175-41-05.
To verify above test results, wait at least 10 minutes and repeat step (b) above.
NOTE:
After above tests, and repairs or replacement are completed, remove the 20O0 ohm resistor. The
d)
Flame Detector Control will not allow the burner to start if the Cad Cell terminals (F-F) are
jumpered.
NOTE:
If Cad Cell and Flame Detector Control prove functional, and burner still fails to operate
properly. check "Trouble Shooting Information" for other possible causes, paragraphs 10.5,
1O.6, l0.ll, 10.12 and 10.13.
High Altitude Burner Adjustment:
The air Adjusting Bands on, the burner have been factory adjusted for proper operation between sea level and
1000-foot elevation at standard conditions (60 ambient water and air temperature) with sufficient excess
fuel pressure (before modulation) to assure satisfactory operation with as low as 45 F, ambient water and
air temperatures.
For each additional 1000 feet of elevation it will be necessary to increase the air supply to the burner
compartment approximately 5% to assure proper and efficient combustion of the fuel.
In the event the cleaner is operated with ambient water and air temperatures below 45 F., it may be necessary
to increase the burner's fuel pressure which will also require more air supply for the increased fuel supply.
To avoid inefficient operation and possible excessive sooting at higher elevations or in extreme cold weather
operation It will become necessary to read just the burner's air supply and it is recommended the air adjust-
ment be set with the use of a
Smoke Analyzer kit. A reading of #3 smoke spot or less is
acceptable during full burner (before modulation of fuel pressure) operation.
