Technical Information

 Manifold pressure at gauge #1, figure 1) above, measures the pressure delivered to the burner and this is specified in the AGF catalog for the burner in question. For gas air burners 8” W.C. at this point is common and 10”W.C. is usually the maximum. This gauge point should be at least 6” from the mixer. No valves should be used between the mixer and the burner. The use of valves in this area can cause air to be backed up into the gas line and could result in an explosion.

  In some cases where a mixture is split so that one mixer feeds more than one burner by means of a manifold you should go at least 6” from the mixer before splitting the flow and the split should be made with equal runs to each burner so that they will be balanced. A balancing plug or screw is sometimes used in one leg to permit some adjustment, but it must be made so that it cannot be used as a complete shut-off and cause back pressure into the gas line.

 When setting up your gas train, please use the pipe manifolding calculator as a rule of thumb to help reduce pressure loss when going from one pipe size to another(or multiple outlets). 

Air-Gas Burner Operational Instructions - Manual

1) Inspect to make sure of proper installation of the burner, Venturi mixer, needle valves, Air filter regulators, zero gas governors or gas      regulators and other equipment. Insure that gas and air lines do not leak. After inspection you are ready to begin.
              a. Needle valves on Venturi mixer should be closed
              b. Set Air Filter Regulator to 20-30 PSIG
              c. If solenoids are in line, the will need to be energized or manually opened.
2) Turn gas on using the needle valves (or another flow controller for gas) and spark ignitor until you have a gas rich lazy flame.
      Turn gas needle valve open and light. Gas only.3) Start the addition of compressed air 
4) Adjust Air and Gas unit Sharp Blue Flame Cones are obtained 
5) At This point you can lock the Needle valves in place (optional)
6) Set up Spark Ignition (see circuit schematic for proper installation of solenoids,      spark ignitors, flame sensors, etc.)

1748ZN: 3" Flame. Fig. 11-55 Insert. Center Feed Connection. Style "X" manifold. 1/2" NPT pipe inlet, gas on only.

1748ZN, adding air to the gas mixture. You should obtain a blue flame when adding air.

1748ZN with air and gas adjusted to obtain a sharp blue cone flame. The cone height on a figure 11-55 insert should be about 7/8” (.875”) inches from the face of the burner insert.