Viessmann VITODENS 111-W Installation And Service Instructions Manual page 10

Information
Product information
The appliance is equipped with a sealed
unvented hydraulic system with 2 con-
nections for heating flow and return and
2 connections for DHW heating.
The following components are integra-
ted into the hydraulic system:
■ Circulation pump
■ 3-way diverter valve
■ Safety valve
10
(cont.)
■ Heating water expansion vessel and
DHW expansion vessel
■ Cylinder and plate heat exchanger for
DHW heating
Connecting accessories
Outside temperature sensor and time
switch are connected with low voltage to
the control unit.