Accessing The Boiler; Burner Control - Viessmann Vitocrossal 200 CM2 186 Service Instruction

Burner Service

Accessing the Boiler

Burner Control

30
Vitocrossal 200 CM2 186 to 311 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 90 from the burner control
and plug 40/156 , 40 and 53 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 four M12 bolts 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.