Motorized Burner Inlet Damper; Inlet Damper Servomotor - Viessmann Vitocrossal 200 CM2 500 Service Instructions Manual

Burner Service

Motorized Burner Inlet Damper

Note: CM2 models are equipped with a motorized burner
inlet damper.

Inlet Damper Servomotor

Note: CM2 models are equipped with a inlet damper
servomotor.
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Vitocrossal 200, CM2 400, 500 and 620 Service
1. Remove the four M6 (5 mm hex) bolts and nuts from
the burner inlet damper and set aside.
2. Remove the burner inlet damper from the burner along
with the servomotor and linkage.
3. Remove the servomotor cover and screw and set aside.
4. Disconnect the servomotor electrical connection from
the servomotor.
5. Remove the linkage and servomotor and set aside.
6. Reinstall the servomotor and linkage to the new burner
inlet damper.
Note: Ensure the burner inlet damper vents are in the
fully open position when reconnected. Adjust
linkage if necessary.
CAUTION
If burner inlet damper is not opened completely it may
lead to malfunctions or indicates a wrong setup of the
servomotor.
7. Reinstall in reverse order.
Note: Torque the M6 (5 mm hex) screws to 35 lb.in (4 Nm).
Note: Torque the linkage parts to 13 lb.in (1.5 Nm).
1. Remove the two M4 (3 mm hex key) screws and
washers connecting the servomotor and set aside.
2. Loosen the M5 (4 mm hex key) set screw connecting
the linkage to the servomotor.
3. Remove the servomotor screw and cover and set aside.
4. Disconnect the servomotor electrical connection from
the servomotor.
5. Remove the servomotor and replace.
Note: Ensure the burner inlet damper vents are in the
fully open position when reconnected. Adjust
linkage if necessary.
CAUTION
If burner inlet damper is not opened completely it may
lead to malfunctions or indicates a wrong setup of the
servomotor.
6. Reinstall in reverse order.
Note: Torque the M4 (3 mm hex) screws to 8.8 lb.in (1 Nm).
Note: Torque the M5 (4 mm hex) set screw to 13.2 lb.in
(1.5 Nm).