Check Operation Of Heating System - Vaillant VCW 2O Instructions For Installation And Servicing

9.3. Sheet 3: Check Operation of Heating System
(Do not use domestic hot Water, switch for domestic hot water remains in Position Zl)
Push Heating Switch
into position l.
' ls voltage \
240 V AC trom
Switch give
. light? /
Can Pilot be Iit?
ls Overheal
CufOfi
Device
of Overheat-
Cut-Off-Device
@ o n P . C B
t a t ' f
50