Viessmann VITOPEND 200, Installation And Service Instructions For Contractors

Page: 31 / 132

1. Switch ON the control unit and call
up the relay test:
Constant temperature control
unit:
K + d press simultaneously for
at least 2 s.
a / b press, until " 5 " is dis-
played.
Weather-compensated control
unit:
K + d press simultaneously for
at least 2 s.
a / b press, until " Valve in mid-
dle pos. " is displayed.
2. Wait until the valve has moved into
its central position (approx. 5 s),
then switch OFF the main ON/OFF
switch "
8 " at the control unit.
3. Drain the heating system via the
boiler fill & drain valve
A .
Further details regarding the individual steps
(cont.)
31
Commissioning, inspection, maintenance
5592
817
GB
Service