15
Alpha CD50 - Installation
Fig. 14
4.5 CONNECT THE PIPEWORK - Fig. 15
1. Thoroughly flush out all the water pipework. Refer to Section 3.9.
2. The valves/fittings have been factory fitted, however, check that all the connections underneath the boiler have been
tightened, especially the union bends.
Note: When soldering to the boiler union bends, ensure the bends are not connected to the valves, otherwise the internal
seals may be damaged.
3. Connect the cold water supply pipework to the pressure reducing valve (supplied) and then to the boiler.
Refer to Domestic Hot Water System, Section 3.11.
Note: Ensure that the pressure reducing valve is connected correctly, i.e. flow is in the direction of the arrow on the valve body.
4. Connect the system pipework to the boiler.
Note: Do not forget that the pressure relief valve discharge pipe must be routed clear of the boiler to a drain in such a
manner that it may be seen, but cannot cause injury to persons or property.
5. Connect the 22 mm condensate trap drain pipe to the condensate discharge pipe.
Ensure that the condensate discharge pipe is as required in Section 3.12.
Pour at least 0.5 litre of water into the flue duct, as shown in Fig. 14, and check the condensate discharge pipe for soundness.
6. Ensure that all the valves are closed (spindle flats at right angles to valve) and do not turn on the water or gas supplies at this stage.
7. Connect the discharge pipework to the temperature/pressure relief and expansion relief valves via the tundish supplied.
This pipework must be installed as recommended in Unvented Hot Water Storage System, Section 3.12.
A - Hot water outlet (15 mm)
B - Cold water inlet (15 mm)
C - Heating return (22 mm)
D - Heating flow (22 mm)
E - Gas inlet (22 mm)
F - Heating pressure relief valve (15 mm)
G - Heating drain point
H - DHW expansion relief valve (15 mm)
I - Drain point for DHW store
J - Cold water inlet filter
K - Check valve
L - Automatic flow regulator valve
M - Temperature/pressure relief valve discharge pipe
N - Condensate discharge pipe
O - Condensate trap
P - Cyclone
Fig. 15
Pour water into flue duct
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