Midco International Inc.
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11. Reset the Blower Air Shutter to match the intended input, i.e.; full open for maximum, closed
for minimum or partially open for midrange. The Blower Air Shutter is factory set wide open.
Adjust as necessary when, with combustion air available in the incineration chamber, it is
desirable to increase the fl ame length, or to restrict the amount of excess air discharged into the
incineration chamber when the burner input is below 450 MBH.
12. The actual NATURAL gas fi ring rate in BTU per hour can be determined by timing the gas
meter. Accurately time the meter test dial for one revolution, convert to hourly cubic feet and
multiply by the BTU per cubic foot value of your gas per formula:
3600 x test dial size x BTU value
= BTU/Hr.
No. of seconds for one rev. test dial
Then divide by 1,000 for MBH value.
Example: 3600 x 1 x 1000* = 360,000 BTU/HR = 360 MBH
10
*Approximate BTU value
13. Start and stop the burner several times to check its operation with the charging door open,
and then with it closed. Remove any temporary Door Open bypasses installed in Step 6.
14. Test operation of any auxiliary operating and/or limit controls.
15. Load incinerator and make trial run. Confi rm that the incineration chamber pressure stays
within the range of 0 to minus 0.5″ W.C.
16.
WARNING: When the incinerator is located inside a building and a draft control
is used, check that there is no spillage of fl ue products from the draft control.
17. To shut off : Turn Burner Switch or Timer off and close Main Manual Shut -Off Valve
WARNING: BE SURE THAT THE MANUAL VALVE AND BURNER DISCONNECT
SWITCH ARE TURNED OFF BEFORE ANY PARTS ARE REMOVED FOR SERVICE.
__________________________________________
The Ignitor and Regulator Assembly is removed as a unit. Disconnect the ignitor gas line and
electrode wires, remove the two mounting screws and pull out the assembly.
-
When the ignitor gas pressure is in the proper range (see Table 3) and the electrodes are
adjusted to the dimensions shown in Figure 5, any ignition problems are usually caused by lint, dust,
corrosion, cracked electrode insulators, foreign matter in the blast tube or deterioration of ignitor
ports in Retention Plate.
-
Ignitor trouble will be evidenced by failure of main burner ignition. It may cause frequent
Electronic Control lockout. Check for dirt in the ignitor air and mixture passageways and check for
obstructions in the ignitor ports. Also check electrode adjustments (see Figure 5). Replace any
severely burned parts.
Initial Start Up /
Adjustment
Continued
Service
VIII Ignitor &
Regulator
Assembly
Figure 4 -
General Burner Head Assembly
Installation and Service
