Viessmann VITODENS 050-W Installation And Service Instructions Manual page 89

Control unit assembly
Pos. Part
0001 Programming unit
0002 Burner control unit
0003 Cable harness X1/X17/stepper motor
0004 Cable harness 100/35/54/ion
0005 Cable harness, connecting cable X21/GFA/programming unit
0006 OT/ATS (outside temperature sensor) lead
0007 Heating circuit pump connecting cable 20
0008 PWM bus cable
0009 Power cable
0010 Fuse 2.5 A (slow) 250 V
(cont.)
Parts lists
89