Checking The Burner; Checking The Non-Return Valve In The Mixing Device - Bosch Condens 8300i W Installation And Maintenance Instructions Manual

Inspection and maintenance
9.9

Checking the burner

1. Remove the nut and screw [1] on the burner cover.
2. Remove the burner cover.
1.
1
Fig. 45 Removing the burner cover
▶ Remove the burner and clean its components.
Fig. 46 Burner
▶ Reinstall the burner in reverse order, including a new gasket if
required.
▶ Install the burner and the burner cover.
▶ Tighten the screw ([1], Fig. 45) on the burner cover with
5.5+0.5 Nm.
40
▶ Tighten the nut on the burner cover with 15+4 Nm.
0 mm
2.
1. 1. 1.
2.
3.
0010040962-001
Fig. 47 Tighten the nut on the burner cover
▶ Check the gas/air ratio.
9.10

Checking the non-return valve in the mixing device

1. Disconnect the transformer.
2. Loosen the screw [1] and nut [2] on the mixing device.
3. Remove the mixing device.
2.
1
0010023603-002
Fig. 48 Removing the mixing device
1. Remove the non-return valve.
1.
0 mm
2.
+
15+4 Nm (min. 90°)
2.
3.
1.
3.
Condens 8300i W – 6721841533 (2022/12)
1.
+
15+4 Nm (min. 90°)
0010033960-003
2
0010040965-001