Burner Fan; Burner Tube - Viessmann Vitocrossal 200 CM2 186 Service Instruction

Vitocrossal 200 CM2 186 to 311 Service

Burner Fan

Burner Tube

Not in CM2-186
1. Loosen the retaining clamp and disconnect the
combustion air flex hose and set aside.
2. Disconnect the gas line.
3. Disconnect electrical plugs 100 and 100A from the fan.
4. Disconnect the APS1 pressure switch tube from
the venturi.
5. 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).
6. Remove the four M8 (13 mm hex) nuts connecting
the fan to the burner door and set aside.
7. Remove the six M8 (13 mm hex) bolts and washers
connecting the fan to the venturi and set aside.
8. Replace the two fan/burner door gaskets as required.
Note: Replace the gaskets in the original
order and orientation.
9. When installing the fan to the venturi torque the M8
(13 mm hex) bolts to 53 lb.in (6 Nm).
Note: Install the fan in the original orientation.
10.When installing the fan assembly to the burner door
torque the M8 (13 mm hex) bolts nuts to 53 lb.in (6 Nm).
11. Reinstall in reverse order.
WARNING
Leak test the reconnected gas line.
1. Loosen the retaining clamp and disconnect the
combustion air flex hose and set aside.
2. Disconnect the gas line.
3. 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 , 53 and 40 from the burner
control bracket and plugs 90 and 41 from the
burner control.
4. Remove the four burner tube M8 (13 mm hex) nuts
from the burner door.
5. Remove the burner tube with retaining ring and gasket A.
Note: When reinstalling the burner tube, rotate the
burner tube until the mounting studs align with
the holes in the burner door.
6. Torque the M8 (13 mm hex) burner tube nuts to
88 lb.in (10 Nm).
7. Torque the M12 (19 mm hex) door bolts to 13 lb.ft
(18 Nm).
8. Reinstall in reverse order.
WARNING
Leak test the reconnected gas line.
Burner Service
39