Installation Procedure 8; Primary Pipework - Vaillant Vantage 120 Installation Instructions Manual

´B´ Port
to
cylinder
Fig. 9
Vaillant Vantage 120/150/200
W H
M
´AB´ Port
boiler flow
8 Installation procedure
•
Unpack the VANTAGE cylinder and check the contents
(detailed in section 1: notes to installers).
•
Position the VANTAGE in accordance with section 7.1:
Siting
Note:
For VANTAGE 150 and 200 cylinders, remove
the blanking plug from the DHW thermostat
pocket located centrally at the top of the cylin-
´A´ Port
heating
der. Uncoil the sensing probe of the operating
flow
thermostat and insert it FULLY into the pocket.
Secure the probe in position by fitting the retai-
ning clip supplied (the VANTAGE 120 thermostat
probe is factory fitted).

8.1 Primary pipework

The 3 port valve is supplied prefitted to the VANTAGE
cylinder. The three ports of the valve are marked "A",
"B" and "AB" (see fig. 9).
•
Connect the flow pipe from the Vaillant boiler to the
"AB" port of the three port valve.
•
Connect the radiator system flow pipe to the "A" port
of the three port valve.
(The "B" port of the 3 port valve is already connected to
the VANTAGE cylinder primary flow connection).
•
Install a return pipe from the cylinder return connec-
tion to the boiler return connection.
Note:
The primary return connection of the VANTAGE
cylinder must be joined into the return pipe from
the radiator circuit, and should be the last
connection before the boiler.
A balancing valve should be fitted between the
cylinder return connection and the return pipe
from the radiator circuit (see fig. 10). This valve
should be set to ensure correct primary flow
through the radiators and cylinder during simul-
taneous heating and hot water demand.

Installation procedure 8

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