Parts List & Instructions 4831 Page 2
suggested piping
Zone A (1 Burner)
Zone B (2 Burners)
Impulse tap should enter air line parallel to valve shaft to minimize turbulence effects.
Air
Motor Operated Valve
5 pipe dia.
3 pipe dia. min.
Nozzle-Mix Burners
Manual Air Valve
5pipe dia. min.
3 pipe dia. min.
Manual Air Valve
Flexible Nipples
Impulse Line 8 " OD minimum
Metering Orifice Limiting Orifice Gas Valve
3 /
10D min.
4D min.
Shutoff Valve
4D min.
10D min.
10D min. Shutoff Valve
4D min.
Gas
Air/Gas Ratio Regulator
2 psi max.
Tee for checking impulse pressure
* Limiting orifice gas valves must be mounted as close to the burner as possible.
INSTALLATION To minimize leaks around tile and to prevent cracking of tile by thermal expansion in the wall, see Supplements DF-M1 (for hard refractory lined fur- naces) and DF-M2 (for fiber lined furnaces) for installation recommendations.
LIGHTING AND ADJUSTMENT
b) Open gas shutoff valve(s). If burner dœs not light within a few seconds, close gas shutoff valve and open limiting orifice valve one more turn; then open gas shutoff valve. Repeat purge/ignition attempts as necessary until burner lights. c) Slowly open main air valve to high fire position, adjusting limiting orifice valve as necessary. d) Return control valve to low fire position. Adjust air/gas ratio regulator for desired flame. e) Repeat Steps (c) and (d) if necessary. Replace cover on limiting orifice valve. f) For multiple burner zones, approximate limiting orifice valve settings can be made by counting the number of turns open on the first valve. 4. Trouble-shooting: a) Gas supply pressure too high or too low (see appropriate regulator literature.) b) Impulse pressure too low to ratio regulator--check for dirt in line or connections; check method of connecting impulse line to air pipe (see regulator literature). c) Regulator not controlling--check method of connecting impulse line to air pipe; check regulator diaphragms (see regulator literature); if bleeder is used, check orifices for dirt.
Warning: Startup and adjustment of combustion equipment should only be done by trained personnel familiar with combustion technology, combustion equipment, and with the particular burner system, equipment, and controls.
1. Basic: a) All manual and automatic fuel valves (gas and oil) must be closed. b) Open all furnace doors and flue dampers. Lock all burner air valves in full open position. c) Start combustion air blower and check rotation. d) Adjust control motor/air valve linkage(s) for low and high fire. e) Set control motor(s) at high fire allowing furnace to purge for several minutes prior to lighting. Check motor amps with all burners at high fire. If in overload, adjust linkage to reduce the high fire air flow. f) Return the control motor to low fire. Linkage must not bind.
2. Pilots: Light the pilots in accordance with the pilot instruction sheet.
3. Main Burner: a) Open limiting orifice valve five turns (CCW) from full closed position.
Note: Prior to the first, and each subsequent lighting attempt, the main air valve must be fully opened for a period of time sufficient to provide for a minimum of (4) changes of atmosphere in the combustion chamber and flue. Failure to do so can result in the ignition of residual gas from previous lighting attempts, resulting in an uncontrolled fire or explosion and causing property damage and/or personal injury.
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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