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24 Vdc SDC Burner Manual
Section: Nozzle Assembly Maintenance
Correct Nozzle and Flow
Rate Required
Incorrect nozzles and fl ow rates could
result in impaired combustion, under-
fi ring, over-fi ring, sooting, puff-back of
hot gases, smoke and potential fi re or
asphyxiation hazards.
Use only nozzles having the brand, fl ow rate (gph),
spray angle and pattern specifi ed by the appliance
manufacturer.
Follow the appliance manufacturer’s specifi cations for the
required pump outlet pressure for the nozzle, since this
affects the fl ow rate.
Nozzle manufacturers calibrate nozzle fl ow rates at
100 psig.
When pump pressures are higher than 100 psig, the
actual nozzle fl ow rate will be greater than the gph
stamped on the nozzle body. (Example: A 1.00 gph
nozzle at 140 psig = 1.18 gph)
Securely tighten the nozzle (90 torque inch pounds). For typical
nozzle fl ow rates at various pressures refer to Table 2.
y
y
Use care when removing or
installing an oil nozzle
A damaged nozzle could cause impaired combustion,
sooting, puffback of hot gases, oil leakage and
potential fi re or asphyxiation hazards.
Inspect the nozzle adapter to insure that the sealing
surface is not grooved or scratched.
To insure that the nozzle functions properly, check the
orifi ce and strainer for dirt, scratches or other damage
before installation.
Do NOT attempt to install or remove a nozzle without
securing the adapter to prevent seriously damaging
the alignment.
Use care when handling the nozzle line assembly
to prevent changing the electrode tip settings or
damaging the ceramic electrode insulators.
Ensure the electrode settings match the values shown
in Figure 3.
y
y
y
y
y
B. Check/Adjust Electrodes
Check the electrode tip settings. Adjust if necessary
to comply with the dimensions shown in Figure 3. To
adjust, loosen the electrode clamp screw and slide/rotate
electrodes as necessary. Securely tighten the clamp
screw when fi nished.
If the nozzle is already installed, remove the nozzle
line assembly to verify that the nozzle size and spray
pattern are correct for the application (per equipment
manufacturer’s information). Verify that the electrode
tip settings comply with Figure 3.
3.
Item # Description
1 Electrode Contact (3” ATC or extension over 3”)
2 Nozzle Line
3 Spider spacer assembly
4 Static Plate
5 Electrode clamp
6 Electrode clamp retaining screws
7 Nozzle line setscrew
8 Electrode Insulator
9 Nozzle adapter
10 Nozzle tip
11 Electrode tip
Figure 2. Nozzle, Line & Electrode Assembly
Air Tube Length Dimension ‘S’
2-5/8” to 3” 1-3/8”
3-5/8” to 4-1/2” 1-5/8”
over 4-7/8” 2-13/32”
Figure 3. Electrode Tip Setting
1/4” ABOVE
CENTER
5/32” GAP
1/8” NOZZLE-TO-TIP
SPACING
10
11
6
8
1
2
7
4
9
3
5
4
90°
Contacts to be parallel with
horizontal center line within 2°.
Electrode gap to be centered
with nozzle center.