Midco J83-DS - Manual (Page 6)

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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 stan-
dard C22.1, "Canadian Electrical Code Part 1."
„ Use copper wires and provide disconnect and fuse protection for each INCINOMITE instal-
lation. Refer to SPECIFICATIONS, page 2, for ampacity. Confirm 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 affect the flame safeguard,
causing it to malfunction.
„ 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.
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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 Orifice Fitting
and a PROPANE label and conversion instructions.
„ 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. Confirm 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 first 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 temporari-
ly 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 flame 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 accumulat-
ed 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 flame. If it is weak, screw in the Ignitor regulator adjustment to
increase the pressure. If it is excessively rich and large or floating from the ignitor tip,
back off the regulator adjustment to reduce the pressure. Set the ignitor to a stable
blue flame which burns firmly within the ignitor tip. Check flame current with a micro-
ammeter 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 specified range during adjustment, an over-fire
condition could result when pressure returns to normal, particularly if the regula-
tor adjustment screw is BOTTOMED OUT. ALWAYS confirm that at least the min-
imum rated pressure is being supplied to the ignitor during regulator adjust-
ments, and NEVER BOTTOM OUT regulator screw. Operate air shutter through
out range to confirm Ignitor stability. Try several relights. Refer to Table 3.
6
Part 1 Installation
VII Initial Start Up /
Adjustment
VI Electrical