Burner Fan; Burner Tube - Viessmann Vitocrossal 200 CM2 400 Service Instructions Manual

Burner Service

Burner Fan

Burner Tube

40
Vitocrossal 200, CM2 400, 500, 620 and 620 TX Service
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 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 31).
5. Remove the four M8 (13 mm hex) nuts connecting
the fan to the burner door and set aside.
6. Remove the six M8 (13 mm hex) bolts and washers
connecting the fan to the venturi and set aside.
7. Replace the fan/burner door gaskets as required.
Note: Replace the gasket in the original
order and orientation.
8. 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.
9. When installing the fan assembly to the burner door
torque the M8 (13 mm hex) bolts nuts to 53 lb/in (6 Nm).
10. Reinstall in reverse order.
WARNING
Leak test the reconnected gas line.
Removing the burner
WARNING
Disconnect the gas line and power connections and
safeguard against reconnection prior to this procedure.
1. Remove the six M12 nuts and washers and set aside.
2. Remove the burner and frame from the boiler door.
IMPORTANT
Use care when removing the burner as not to damage the
burner cylinder (e.g. passing through the door refractory).