Functional Description 6; Temperature Control; Control; Primary Circuit - Vaillant Vantage 120 Installation Instructions Manual

Functional description 6

6 Functional description
6.1 D.H.W. Temperature Control
The VANTAGE is supplied fitted with a user adjustable
domestic hot water (DHW) thermostat and also a 3 port
mid position diverter valve.
6.2 C.H. Control
Central heating is controlled by the fitted 3 port mid
position diverter valve in conjunction with suitable
external controls, such as a programmer, room ther-
mostat or thermostatic radiator valves. The external
electrical controls should be wired to the 3 port valve
and cylinder thermostat in the normal way, as shown in
section 8.4.2, VANTAGE Electrical Connections and
Controls. No additional motorised valves are necessary.

6.3 Primary Circuit

The VANTAGE cylinder is provided for connection to the
flow and return of any Vaillant wall hung system boiler.
All Vaillant wall hung system boilers have the following
components built-in:
– Sealed primary system equipment (expansion vessel,
pressure relief valve and pressure gauge)
– Circulating pump
– Automatic primary system by-pass
– Boiler overheat thermostat
The 3 port valve is supplied fitted to the cylinder for
easy connection to the primary flow from the Vaillant
boiler, and the heating flow. No additional motorised val-
ves are required.
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Vaillant Vantage 120/150/200