NOZZLE MIX SYSTEMS
0.6 osi
If the spring plug is screwed in the equivalent of 0.1 osi, the outlet gas pressure (vertical force) required to balance the spring will be the 0.5 osi impulse plus 0.1 or 0.6 osi.
0.5 osi
0.5 osi
0.1 osi
If the spring plug is screwed out until the weight of the internals is equivalent to 0.1 osi, the outlet gas pressure (vertical force) required to balance the spring will be the 0.5 osi impulse minus 0.1 equals 0.4 osi.
0.4 osi
0.5 osi
0.5 osi
0.1 osi
ADJUSTMENT OF AIR/FUEL RATIO AT LOW FIRE RATE, (cont.)
This example adds or subtracts 20% of the gas pressure at low fire, but at a high fire of 16 osi, adds or subtracts only 0.1 osi รท 16 osi = 0.6%. This affects low fire ratio considerably, but has practically no effect on the high fire ratio. The spring is adjustable up to about 1"w.c. positive or negative. If a large amount of adjustment is made, it may be necessary to return to high fire and correct the high fire ratio.
22
Made with FlippingBook - Online catalogs