System Boiler - Y & S Plan Systems (2 Pipes); System Boiler - Heating Only (2 Pipes) - Viessmann VITODENS 200-W Installation Instructions Manual

Vitoden 200-W pages 44 -
Y & S Plan system (2 pipes) (Hydraulic cylinder Flow and Return connections
capped off at the boiler)
• Connect the required permanent live
supply to plug 40 as combination boiler.
• An external independent twin channel
remote timer is used.
• The Vitotronic HC2 integral timer must
be set to constant operation.
• The switched live supply from Y & S
plan electrical configurations (that con-
trols the pump and boiler) is connected
to plug 96 terminal 1.
Heating only system (2 pipes)
• Connect the required permanent live
supply to plug 40 as previous page.
• Connect room thermostat to plug 96 as
combination boiler.
• The Viessmann low voltage DHW
sensor must not be fitted, this means
the 3 port valve integral to the boiler
will remain open correctly.
• Time heating via integral Vitotronic HC2
control.
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• The Viessmann low voltage DHW
• Vitotrol 100 UTA/D external controls are
• Control heating & DHW via external
• A Vitotrol 100 UTA/D can be connected
sensor must not be fitted, this means
the 3 port valve integral to the boiler
will remain open correctly.
not compatible.
independent timer.
to plug 96, however the integral
Vitotronic HC2 7 day controller would
require the central heating to be set to
permanently on, please refer to user
guide.