Sheet 4979-1 Page 4
INSTRUCTIONS (Burner with Gas Pilot)
4. Open the 1518 or 1519 Valve. With the control valve wide open, use a metering orifice and manometer to adjust the gas pressure regulator to obtain 1 000 000 Btu/hr for each lineal foot of burner. The flame should then be mostly blue with some yellow tinges and about 24" long with 1"w.c. duct differential pressure; 30" long with 0.5"w.c. 5. Adjust and test all burner safety devices--manual reset fuel shutoff valve, purge timer, low fire start, air flow switch, flame safety relay, high and low gas pressure switches, over-temperature control, block and vent valves, etc.
1. Adjust the profile plates until a differential pressure of 1.0"w.c. can be read across the duct air pressure taps on the feed end- plate (FEP). The burner will operate with any duct differential pressure between 0.30 and 1.50"w.c. Air flow at the profile plate must be of uniform velocity and not spinning. 2. Ignite the gas pilot and adjust the gas flow (usually by screwdriver adjustment in the gas cock) until flame is about 6" long and a good flame detector signal is obtained.
3. Adjust the main gas control valve linkage for desired valve travel.
12 " for - 12 or - 12 -B
DIMENSIONS inches
6
109⁄16
-12 (wt. 21 lb)
129⁄16
-12-B (wt. 22 lb)
6 (- 12 , - 12 -B)
2 ½ fpt gas conn.
hole must be positioned so it faces upstream
LI or LO (wt. 20 lb)
9
3⁄8 tubing or 1/8 pipe
4-5257-1 Pilot Assembly
1⁄8 fpt duct pressure taps
6 ¼ FEP
6 ¼
7⁄8 bore UV or flame rod location
SEP
FEP Feed Endplate (left ) (wt. 3 lb)
7⁄8 bore UV or flame rod location
hole for pilot or igniter
109⁄16
109⁄16
Igniter
SEP Support Endplate (right) (wt. 3 lb)
¾ fpt pipe support
2 " fpt gas conn.
1 ¾
17⁄16
21⁄8
21⁄8
DIMENSIONS SHOWN ARE SUBJECT TO CHANGE. PLEASE OBTAIN CERTIFIED PRINTS FROM FIVES NORTH AMERICAN COMBUSTION, INC. IF SPACE LIMITATIONS OR OTHER CONSIDERATIONS MAKE EXACT DIMENSION(S) CRITICAL .
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
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