Installation Aids; Open Fluid Combi Boiler; Room Sealed Combi Boiler; Domestic Cold And Hot Water Connection - Vaillant VCW 2O Instructions For Installation And Servicing

4.3.1 lnstallation aids
4.3.1.1 Open flued combi boiler
After fixing the connecting group to thewall put
the template in position ancl mark posltlons oI
fixing holes.
The type of fixing used will depend on the type
of wall.
4.3.1.2 Room sealed combi boiler
After installinq the terminal/duct assembly,
hano the tempi-ate on the fixing bolts (1 ) and drill
the 5 holes with 8 mm (5/16 inches) diameterto
fit the connecting group. Use the alternative
fixing holes where necessary.
4.3.2 Domestic cold and hot watel
connection
- Flush out all loreign matter from the
supply pipe before connecting to the
connecting grouP.
- Fit the domestic mains water pipe to the
riqht hand compression union (2) and the
h5t water pipe to the left hand compression
union (3).
ln hard water area the mains supply to union
(2) should be via a scale reducer'
- bhect domestic water system for sound-
ness.
N.B. Thecombi boilerhas amaximumworking
oressure of 10 bar. lf water pressure
bxceeds this a pressure reducing valve
will have to be fitted to cold water inlet.
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