Accessing The Burner; Burner Control - Viessmann Vitocrossal 200 CM2 400 Service Instructions Manual

Burner Service

Accessing the Burner

Burner Control

34
Vitocrossal 200, CM2 400, 500, 620 and 620 TX Service
1. Close main gas supply valve.
2. Switch off main power switch. Ensure that main
power to equipment being serviced is off.
3. Remove front panel and front side panels.
Refer to the boiler Installation Instructions.
4. Remove plugs 41 and 145 from the burner control
and plug 40/156 and 40 from the burner bracket.
5. Remove plugs from electrodes.
6. Remove air intake adaptor and air flex hose.
7. Open the gas connection to the burner.
8. Loosen six M12 screws and open burner door.
1. Loosen the two programming unit screws.
2. Lift and remove the programming unit from the
burner control sub-base and disconnect the cable
connection and set aside.
3. Disconnect all cable connections from the burner
control sub-base.