Viessmann VITODENS 222-F Technical Manual page 29

Installation accessories
Connection set DHW expansion vessel
Part no. 7351 854
For installation in the appliance
Max. operating pressure in the cold water line: 3 bar (0.3 MPa)
Note
The DHW expansion vessel is approved for up to 10 bar. Due to the
cylinder size, however, it can only be used with a maximum operat-
ing pressure of 3 bar. Install an external DHW expansion vessel in
the event of higher pressures.
Components:
■ DHW expansion vessel, 4 l capacity, 3 bar (0.3 MPa) pre-charge
pressure
■ Connection pipes
Safety assembly to DIN 1988
DN15
Components:
■ Shut-off valve
■ Non-return valve and test connector
■ Pressure gauge
■ Diaphragm safety valve
For on-site installation on finished walls
■ 10 bar (1.0 MPa)
Part no. 7219 722
■ a 6 bar (0.6 MPa)
Part no. 7265 023
For installation on unfinished walls in conjunction with the con-
nection set
■ 10 bar (1.0 MPa)
Part no. 7351 842
■ a 6 bar (0.6 MPa)
Part no. 7351 840
Valve/fittings cover
Part no. 7352 257
For connection set for installation on unfinished walls
VITODENS
(cont.)
Not for use in conjunction with filling facility
Filling device with pipe separator
For fitting to the connection sets
■ For installation on finished walls (not for downward connection on
finished walls)
Part no. 7356 492
■ For downward connection on unfinished and finished walls
Part no. 7356 902
Connection set for external heating water expansion vessel
Part no. 7301 709
Expansion vessel connection: R ½
Only for use with Vitodens 333-F
Connection bend for condensate drain
Part no. 7461 025
Connection line from the appliance: DN 20
Drain connection: DN 40
Neutralising system
Part no. 7252 666
With neutralising granulate
4
VIESMANN
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