Chapter 6 — Adjustment Procedures
Part No. 750-184 6-25
Figure 6-10 Burner Drawer with Gas Pilot
Check the setting of the ignition electrode(s) for proper gap and
position. See Figure 6-10 for the gas pilot electrode and Figure 6-
11 for the light oil pilot. Be sure that the porcelain insulator is not
cracked and that ignition cable connections are tight.
The oil nozzle tip should be seated tightly in the body with the
swirler and the seating spring in place. See Section G in Chapter 8
for additional nozzle tip information.
Check to see that the flame detector sight tube and the gas pilot
tube extend through their respective openings in the diffuser face.
W. OIL DRAWER SWITCH
The integral contacts of the control are closed by proper positioning
and latching of the oil drawer in its forward position (Figure 6-17).
Adjustment of the switch must be such that its contacts open if the
oil drawer is not properly positioned for oil firing. The switch is
BURNER
BACKPLATE
ASSEMBLY
NOZZLE
AIR
PRESSURE
GAUGE
NEOPRENE
“O” RING
OIL
INLET
ATOMIZING
AIR
INLET
IGNITION
ELECTRODE
GAS PILOT
ADJUSTING
COCK
BURNER DRAWER
TUBE
IGNITION
ELECTRODE
ELECTRODE
HOLDER
GAS PILOT PIPE
1
/
4
”
3
/
16
” MAX.
3
/
32
” MIN.
ROTARY
DAMPER
SEAL
RING
STABILIZER
BURNER GUN
OIL NOZZLE BODY
SPIDER
FRONT EDGE OF
DIFFUSER SKIRT
DIFFUSER
OIL NOZZLE
7/16"
GAS
RETAINING
SCREW
ACCESS PLUG
SECONDARY PLUG
GAS PILOT ASPIRATOR
GAS AND AIR
MIXTURE TO PILOT
IGNITION
ELECTRODE
GLAND
GAS PILOT
ADJUSTING
COCK
AIR
GAS
Figure 6-11 Electrode spacing - oil
pilot
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