Viessmann Vitocell 200 Cylinder Design, Installation, User & Servicing Instructions page 24

SERViCiNG
START
YES
Is boiler on?
YES
Is hot water programmer
in 'on' position?
YES
Is zone valve in
correct position?
YES
Is control temperature
set at 55ºC - 60ºC?
YES
Has high limit cut out?
YES
Re-set
END
NO
Switch on
NO
Set programmer
NO
Re-set, check wiring &
plumbing is correct
NO
Re-set
NO
Is all wiring to the
controls ok?
YES
NO
Replace thermostat
Fault - No Hot Water
NO
Re-wire
Page 24