6
Midco
International
Inc.
8470 23
Installation
Installation wiring to the burner must conform to local codes, or, in their absence in the United States
the National Electric Code ANSI/NFPA No. 70- latest edition; in Canada, to CSA standard C22.1,
“Canadian Electrical Code Part 1.”
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Use copper wires and provide disconnect and fuse protection for each INCINOMITE installation
Refer to SPECIFICATIONS, page 2, for ampacity. Confi rm that the polarity is correct— hot wire to
strip terminal
L1
, neutral
L2
and that the neutral line is not subject to induced low voltage (check
L2
to ground) from other equipment as that can aff ect the fl ame safeguard, causing it to malfunction.
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The frame of the burner should be well grounded. A terminal is provided in the control box for
positive grounding.
CAUTION: In order for the automatic cooling system to function, power must be
maintained to burner strip terminal L1. Do not install any safety or on-off controls in the
circuit between the fused disconnect switch and strip terminal L1. Optional remote control
devices should be connected in place of, or in addition to, the switch or timer as indicted in
Figure 3 Wiring Diagram.
NOTE:
Optional 0-6 hour Timer may be substituted for the burner On-Off Switch.
__________________________________________
Burners are suitable for use with NATURAL or PROPANE gas only.
-
If a standard NATURAL gas model is to be used with PROPANE gas, a conversion kit is
available, which contains a PROPANE Main Gas Port, a PROPANE Ignitor Tee Orifi ce Fitting and a
PROPANE label and conversion instructions.
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As shipped, the Air Shutter is in the full open position and the Main Gas Input Adjuster 5 to 6
turns from full closed. Ignitor regulator is factory set for recommended outlet pressure of 3.5″ W.C.
suitable for most applications.
1. Check the burner piping and valves for gas leaks by applying a weak liquid soap solution
to unions and joints with the gas supply on. Leakage will be indicated by the appearance of
soap bubbles. Locate and correct all gas leaks before proceeding.
WARNING: DO NOT USE OPEN FLAME.
2. Confi rm that the main gas Input Adjuster is 5 to 6 turns from full closed and that the Blower
Air Shutter is fully open.
3. Close the Main Manual Shut-Off Valve.
4. Purging the air from the gas supply line at this step will expedite the fi rst light-off .
CAUTION: Purge outside the building. Do not purge into the incineration chamber.
5. Turn on the Fused Disconnect, Burner Switch or Timer. Let motor run long enough to
accomplish four air changes. Note that motor will continue to run after Electronic Control lockout
occurs.
6. Open the incinerator charging door making sure any Door Open interlock is temporarily
bypassed.
7. Turn off the Burner Switch or Timer for at least 30 seconds to reset Electronic Control (see
Section XII Electronic Control System. Open the Main Manual Shut Off Valve.
8. Turn on the Burner Switch or Timer. Burner Ignitor and main fl ame should light during the 6
second trial for ignition after the motor reaches operating speed. If the Ignitor and Main Flame
fails to light during the 6 second trial for ignition, it is probably due to air in ignitor gas line.
Repeat from step 7. Then, if necessary, refer to the Trouble Chart to isolate the problem.
WARNING: Repeated unsuccessful attempts to light will result in accumulated gases
in incineration chamber. To prevent these gases from reaching an explosive level,
periodically purge the incineration chamber as described in Step 5.
9. Observe the ignitor fl ame. If it is weak, screw in the Ignitor regulator adjustment to increase
the pressure. If it is excessively rich and large or fl oating from the ignitor tip, back off the
regulator adjustment to reduce the pressure. Set the ignitor to a stable blue fl ame which burns
fi rmly within the ignitor tip. Check fl ame current with a microammeter and adjust Ignitor
Regulator slowly for highest steady 2 or more microamps.
CAUTION: When adjusting the regulator, take note of the supply pressure. If gas
supply pressure is below its specifi ed range during adjustment, an over-fi re condition
could result when pressure returns to normal, particularly if the regulator adjustment screw
is BOTTOMED OUT. ALWAYS confi rm that at least the minimum rated pressure is being
supplied to the ignitor during regulator adjustments, and NEVER BOTTOM OUT regulator
screw. Operate air shutter through out range to confi rm Ignitor stability. Try several relights.
Refer to Table 3.
10. Remove the input adjuster cap (see Figure 4) and, with the Ignitor and Main Flame on, turn
the Main Gas Input Adjusting Screw (see Figure 4) until the desired input rating is reached
(refer to Table 2). Turning of adjustment screw counterclockwise increases gas fl ow; clockwise
reduces fl ow. If Main Flame gas pressure requires adjustment, refer to Section V Piping Supply.
Electrical
Continued
VII Initial Start
Up / Adjustment
