Burner Door - Viessmann Vitocrossal 200 CM2 186 Service Instruction

Burner Service

Burner Door

40
Vitocrossal 200 CM2 186 to 311 Service
Replacing the burner door
Loosen the retaining clamp and disconnect the
combustion air flex hose and set aside.
Disconnect the gas line.
Disconnect electrical plugs 35, 36, 87, 111 and 122
from the burner control.
Note: To disconnect electrical plugs 87 and 111 remove
the burner control cover (see page 30).
1. Remove the four M8 nuts connecting the fan to the
burner door. Remove the fan with venturi and gas
train and set aside.
Note:Disconnect electrical plugs 100 and 100A from
the fan. Disconnect pressure switch tubes APS1
from the venturi and APS2 from the burner door.
Remove the four M8 (13 mm hex) nuts connecting
the fan to the burner door and set aside. Remove
fan/venturi assembly (see page 39 for additional
information).
2. Remove the two M6 bolts and remove the burner
control assembly.
3. Remove the ignition and ionization electrode block
(see page 36).
4. Remove the cotter pins and hinge pins from burner door
and set aside.
5. Remove the four M12 (19 mm hex) burner door bolts
and washers and set aside.
Note: To access the burner door, disconnect gas line
and plugs 40/156 and 40 from the burner
control bracket and plugs 90 and 41 from the
burner control.
Note: Replace barb fitting washer as required.
6. Remove burner tube (see page 39).
7. Install new burner door.
Note: Install burner door studs to new door for
connection to fan/venturi assembly.
Note: When installing the fan/venturi assembly to the
burner door torque nuts to 53 lb.in (6 Nm).
Torque M12 (19 mm hex) door bolts to 13 lb.ft
(18Nm).
Torque the M8 (13 mm hex) nuts to 53 lb.in (6 Nm).
WARNING
Leak test the reconnected gas line.
8. Reinstall in reverse order.