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e boiler contains ceramic ber materials. Use
care when handling these materials per instructions
on page94 of this manual. Failure to comply could
result in severe personal injury.
1. Allen wrench, 3mm (T-wrench preferred).
2. 8mm socket with 8-inch extension.
3. Metric wrench or socket, 10mm.
4. T20 Torx.
5. 5/16” socket or nut driver.
6. Torque wrench.
7. Putty knife.
1. Shut down the boiler:
a. Follow “To Turn O Gas to Appliance” instructions on
boiler and Operating instructions.
b. Close the boiler manual gas valve.
2. Allow time for the boiler to cool to room temperature if it
has been ring.
3. Remove jacket front door by removing the two (2) latches at
the top of the jacket door.
4. Rotate and li the jacket door away from the boiler to remove.
5. See Figure106 (EVG220 shown).
a. Remove the burner access panel (item1) located on the
top of the boiler jacket by removing the screws (item3).
b. Remove the air bae (item2) and screws (item4) from
the jacket top as shown.
1. Carefully remove the ignition electrode assembly, following
the instructions in “Remove and inspect ignition electrode
assembly and wiring” on page97.
2. Set ignition electrode assembly and new gasket aside for
later re-insertion.
1. Carefully remove the ame sense rod assembly, following the
instructions in See instructions on page97 under “ Inspect
Flame Sense Rod”.
2. Set the ame sense rod with new gasket aside for later re-
insertion.
1. See Figure109,page115 (EVG220 shown).
2. Use a T20 Torx to remove the four (4) M4 screws (item10)
that secure the burner access cover (item4) to the heat ex-
changer cover plate (item6).
3. Remove the burner access cover (item4) and the burner
(item11).
Use caution when removing the burner to pull it
directly up and out. DO NOT angle the burner as
you remove it. Angling the burner could cause it to
strike the refractory, damaging the refractory and
causing fragments to fall into the heat exchanger.
Should this happen, a heat exchanger refractory
replacement kit must be installed and the heat ex-
changer must be thoroughly cleaned following the
procedures given in this manual and the refractory
replacement instructions.
4. Remove and discard the burner gasket (item12). is gasket
is graphite and may pull apartor stick to the burner on re-
moval. Use a so brush if necessary to remove residue. DO
NOT allow debris to drop into the heat exchanger. A new
gasket must be installed later when the burner is re-inserted.
5. Inspect the burner access cover seal (item13). Discard and
use a new seal during re-assembly if the seal is damaged in
any way.
6. Inspect the interior of the burner. Brush and vacuum the
interior if needed to remove lint or sediment. Alternative
cleaning methods:
a. Blow air or nitrogen from the inside out.
b. Clean with a water spray from inside the burner.
7. Inspect the burner exterior. It must be in good condition,
with no visible damage.
8. Clean the under side of the burner ange (see item15) with
a so brush to remove any gasket fragments remaining.
9. Set the burner aside for re-insertion later.
Figure106 Remove the burner access panel and screws
(1 and 3) and air bafe and screws (2 and 4)
from the jacket top as shown
Part number 550-100-211/0122
– 111 –
220 /29 9/3 00 /39 9
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