Installation requirements 7
Vaillant Vantage 120/150/200
17
7.3 Secondary System
To achieve optimum distribution of the water supply it is
important that the water system pipework and
terminal fittings are correctly sized and balanced. The
teed-off supply to the bath outlet should be in 15 mm
pipework. The tee-offs to sinks and basins should be in
10 mm pipework. Terminal fittings should be suitable for
mains pressure operation and taps should be of the
aerated type to prevent splashing.
Some designs of terminal fittings may allow excessive
flow rates resulting in user inconvenience and starvation
of other outlets. In these circumstances provide a valve
in the supply to that terminal fitting in order that the
flow rate can be regulated.
If the VANTAGE is being installed to existing pipework
with a 22 mm run to the bath terminal fittings and/or 15
mm to sinks/basins, an adjustable valve should be fitted
in the supply to each outlet: By adjustment of these val-
ves, flow rates to fittings can be regulated to achieve
correct system balancing.
If the water capacity of the additional secondary pipe-
work exceeds
20 litres (VANTAGE 120 or 200) or
10 litres (VANTAGE 150) an
additional expansion vessel may be required.
Pipe capacities for copper tube are:
15 mm
0.13 l/m
22 mm
0.38 l/m
28 mm
0.55 l/m
The cylinder may be drained completely for maintenan-
ce works via the drain valve (E, fig. 6) after first turning
off the water supply to the cylinder and opening the hot
draw off taps. Adequate access to the drain valve must
therefore be available.
Fig. 7
40
40
8 bar*
4 bar*
3 bar*
2 bar*
1 bar*
8 bar*
4 bar*
3 bar*
2 bar*
1 bar*
30
30
20
20
flow available (litres/min) at entry to system
Mixed water @ 40
°
C, mixed from
60 % hot water @ 60
°
C and
40 % cold water @ 10
°
C
Notes:
1) flow rates shown apply to situations where the supply is capable of supplying an adequate dynamic pressure.
2) the graph represents the results of tests carried out by the BBA and Vaillant.
3) where static water pressures are less than 1 bar, consult Vaillant Ltd.
* static supply pressure of incoming water supply.
flow out (litres/min) of the system
10
10
0
40
40
30
30
20
20
flow available (litres/min) at entry to system
flow out (litres/min) of the system
10
10
0
Flow rates from VANTAGE, hot 60
°
C.
Flow rates from VANTAGE, hot cold mixed.
VIH 3
6
4
/1
