Sheet 4725-1 Page 2
Note: The 30% primary air adjustment as described in step 2 is most common. For conditions requiring different amounts, turn adjusting screw in fully for 20% (87.5% of rated burner capacity) or all the way out for 40% (117% of rated burner capacity).
12. Set gas adjusting valve for correct air/gas ratio as indica-ted by either an 8697 gas metering orifice or a flue gas analyzer. (See Bulletin 8108).
13. Return control motor/air valve to low fire position. Adjust 7219 Regulator for correct air/gas ratio.
14. Repeat step 12 if necessary.
15. Repeat steps 7-14 for each burner.
Figure 2. Linkage of an 1126 Butterfly Valve with a Honeywell Motor at "off" position. This arrangement provides slow opening.
Figure 3. When viewed through rear observation port, electrode wires should appear side-by-side for most reliable ignition .
WARNING: Situations dangerous to personnel and property may exist with the operation and maintenance of any combustion equipment. The presence of fuels, oxidants, hot and cold combustion products, hot surfaces, electrical power in control and ignition circuits, etc., are inherent with any combustion application. Components in combustion systems may exceed 160°F (71°C) surface temperatures and present hot surface contact hazard. Fives North American Combustion, Inc. suggests the use of combustion systems that are in compliance with all Safety Codes, Standards, Regulations and Directives; and care in operation.
CONTACT fna.sales@fivesgroup.com T +1 800 626 3477 - F +1 216 373 4237
Fives North American Combustion, Inc. 4455 East 71st Street - Cleveland, OH 44105 - USA www.fivesgroup.com
Made with FlippingBook flipbook maker