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Hersteller: Empire Comfort Systems Dateigröße: 3 mb Dateiname: Unterrichtssprache:

e. Bottom pan. f. Fan blade. 3. Check wiring for possible loose connections. 4. Controls – See control instruction sheets furnished separately with the unit heater. To Remove Main Burner 1. Turn off all electricity and gas to unit. 2. Lower bottom pan to expose burner and manifold. See Figure 1, Page 2. 3. Disconnect pilot tubing and thermocouple lead (or ignition cable) at the combination gas control (and ignition control.) 4. Remove the two burner retaining pins holding the burner in place. The burner can then be easily lowered from the unit. In replacing the burner, be certain that the slots at the front of the burner are located properly on their shoulder rivets and that the burner retaining pins are put back into their proper locations. MANIFOLD MANIFOLD MIXER TUBES MIXER BURNER TUBES RETAINING PIN MAIN BURNER ORIFICES MAIN BURNER ORIFICES AIR SHUTTER MANIFOLD MOUNTING SCREW AND PIN Heater Parts from ACF Greenhouses 23 2. Yellow Tipping Yellow tipping of a normally blue flame is caused by insufficient primary air, and indicated incomplete combustion producing carbon monoxide, aldehydes, and free carbon (soot). A dirty orifice or one that is out of line, can also reduce primary air and cause yellow tipping. Check orifice, clean realign, or replace if necessary.With propane gas, some yellow tipping is always present, but is not objectionable. 3. Flashback Flashback occurs when air-gas mixture ignites inside the burner to burn near the orifice. Flashback on ignition or during burner operation usually can be eliminated by reducing primary air. The burner may also be operating below its rated capacity. Check input rate and adjust to correct value by increasing orifice size or manifold gas pressure. 4. Wavering Flames Drafts across burners may cause flames to waver or appear unstable.Wavering flames can lead to incomplete combustion if flames impinge on cool surfaces.Wavering can be caused by air drafts into the burner compartment or by misalignment of the burner. Draft-blown flames may indicate a cracked heat exchanger. 5. Floating Flames Floating flames are long – do not have well-defined cones, roll around in the combustion chamber, sometimes completely off the ports. Usually an aldehyde odor is present to indicate incomplete combustion. If combustion air supply is reduced too far, burner flames will float. Often the pilot flame near the port smothers and goes out. Lack of combustion air causes burner flames to float. The unit may be overfired so its flue outlet area may be too small for the increased firing rate. Check input rate and reduce if necessary. Soot or dust may be blocking the flue. Check flue and clear any blockage. Adjust primary air to get rid of yellow tipping that may produce soot to block flueways. Make sure combustion air inlets are not blocked. 6. Flame Rollout Flames rolling out of the combustion air inlets when the burner is turned on can create a fire hazard, scorch unit finish, burn wires, or damag...

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