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MAINTENANCE
!
WARNING
All information in this manual is for
reference and guidance purposes,
and does not substitute for required
professional training, conduct,
and strict adherence to applicable
jurisdictional/professional codes and
regulations.
Never use open ame or other sources
of ignition to check for gas leaks.
Ensure boiler is o and cooled,
with proper lockout - tagout per
local codes prior to service and
maintenance.
4
CAUTION
Use caution when using any cleaning
solutions. Refer to local regulations for
proper cleaning solution disposal.
Do not allow dust or dirt to accumulate
around the boiler.
4-8
Verification of Ignition Gap
–
NOTE:
Fulton recommends annual replacement of the ignition electrode
assembly: EDR-750/1000: P/N 5-20-071003. EDR-1500/2000 P/N: 5-20-072000.
1. Remove ignition electrode assembly (ignitor). Visually check that the
insulators are clean.
2. For re-installation or installation of a new ignitor, verify with calibrated
calipers that there is a gap between electrodes greater than 0.100" (2.54
mm) and less than 0.125" (3.175 mm). See Figure 28.
GAP BETWEEN
ELECTRODE
AND MESH BURNER
MESH BURNER
(
1/16
"-1/8")
(0.0625"-0.125")
FIGURE 28 IGNITOR GAP TOLERANCES
3. Install the ignitor on the burner ange: Apply anti-seize compound to
ignitor screws and tighten in place using a torque-rated screwdriver to 8
inch-pounds. Use only a new gasket assembly, Fulton P/N 2-12-001261.
4. Remove the sight glass, ame scanner, and heat block. Position a light to
shine into the combustion chamber through the sight glass as required.
5. Verify the burner head to ignitor gap with the use of a borescope. For
borescopes equipped with a mirror, insert the end straight down into the
combustion chamber at least 6" (152 mm) to view the ignitor from the side
and bottom. For borescopes not equipped with a mirror, bend and angle
the camera to obtain a necessary view.
6. Visually verify the ignition position relative to the burner head.
ƒ The negative electrode must not be touching or resting on the burner
head.
ƒ The two electrodes must not be touching. See Figure 76.
ƒ The burner to ignition gap tolerance is 0.0625" (1.588 mm) to 0.125"
(3.175 mm), it should appear visually similar to the electrode gap. See
Figure 76.
7. Remove the borescope and reinstall the heat block, ame scanner, and
sight glass. Apply new thread sealant to all applicable connections.
SECTION 4
EDR-PURE-IOM-230608
GAP BETWEEN
THE ELECTRODES
NEGATIVE
ELECTRODE
(3/32"-
1/8
")
(0.1" - 0.125")
© Fulton Group N.A., Inc. 2023
POSITIVE
ELECTRODE
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