IBC Technologies Inc.
1-844-432-8422
|
www.ibcboiler.com
120-388E1
-
April 24, 2024
- Released Document
4 of 6
6. Remove the top service panel by removing the three yellow thumbscrews at the top corners of the
boiler.
Removing the fan and gas valve assembly
1. Disconnect the two electrical connectors from the fan (A).
2. Disconnect the electrical connector from the gas valve (B).
3. Position the wiring harnesses out of the way of the heat exchanger lid (F).
4. Disconnect the flare-fitting nut on the gas supply line (C).
5. Remove the four 8 mm hex bolts attaching the fan to the heat exchanger lid.
6. Remove the fan and gas valve assembly. Retain the fan gasket (D)
(and fan coupler and coupler
gasket for the G1)
for reinstallation.
Note
SL 20-115 G2 only
: The fan and venturi are one unit and must not be separated.
If necessary, the gas valve can be removed from the fan/venturi assembly by removing the two
Torx 25 screws. Retain the gasket between the gas valve and venturi for reinstallation, and
ensure that it is intact and free from debris. For LP models there will be a brass orifice installed in
the gasket. There is no orifice required for NG models.
Removing the heat exchanger lid
1. Disconnect the ignitor cable (E) and move it out of the way.
2. Remove the two #2 Phillips screws securing the ignitor to the heat exchanger lid.
3. Carefully remove the ignitor by sliding it straight up.
4. Remove the ignitor gasket.
5. Place the ignitor parts on a clean, dry area for reinstallation.
6. Remove the nuts attaching heat exchanger lid to the heat exchanger (K) with a 10 mm wrench or
socket.
7. Mark the alignment between the lid, lid gasket (H) and heat exchanger with a permanent marker or
equivalent.
Caution
Position yourself directly above the heat exchanger lid before removal to ensure a
straight, vertical extraction. Failure to do so may result in refractory damage.
8. Slowly lift the lid-burner assembly (F, I) off the heat exchanger. The refractory (J) should remain in
place in the heat exchanger's combustion chamber shoulder. There is less than 1/8” (3 mm) of
clearance between the burner walls and the refractory; ensure that there is minimal contact between
them to prevent the refractory from cracking.
9. Place the lid with the burner attached on a clean, dry surface.