V
Volume of the expansion vessel
Tab.11 Volume of the expansion vessel in relation with the volume of heating circuit
Initial pressure
of the expan
sion vessel
Volume of the installation (in litres)
100
125
150
175
200
250
300 > 300
0.5 bar
(50 kPa)
4.8
6.0
7.2
8.4
9.6
12.0
14.4 Volume of the installa
tion x 0.048
1 bar
(100 kPa)
8.0
10.0
12.0
14.0
16.0
20.0
24.0 Volume of the installa
tion x 0.080
1.5 bar
(150 kPa)
13.3
16.6
20.0
23.3
26.6
33.3
39.9 Volume of the installa
tion x 0.133
Terms and conditions of validity of the table:
Safety valve calibrated to 4 bar.
Average water temperature: 70°C
Flow temperature in the heating circuit: 80°C
Return temperature in the heating circuit: 60°C
Filling pressure in the system lower than or equal to the initial pressure
in the expansion vessel.
6.3.3 Connecting the condensate discharge pipe
The condensate discharge pipe is located inside the boiler.
See
Unpacking and initial preparation, page 29
Do not block the condensate discharge pipe.
Set the discharge pipe at a gradient of at least 30 mm per metre, maxi
mum horizontal length 5 metres.
Do not drain condensation water into a roof gutter.
Connect the condensate discharge pipe in accordance with prevailing
standards.
It is preferable to use the condensate neutralisers recommended by the
manufacturer of the boiler.
1. Connect a plastic hose to the condensate discharge outlet (DN18).
2. Insert the other end of the hose into a waste water discharge outlet.
6.4 Gas connection
See
Gas supply, page 24.
Close the main gas valve before starting work on the gas pipes.
The gas pipes are not provided.
Danger
The diameters of the pipes must be defined in accordance with
the standards in force in your country.
1. Remove the anti-dust plug located on the boiler's gas inlet.
2. Mount a gas stop valve (not provided) on the boiler's gas inlet.
Fig.45 Mounting the hose on the conden
sate discharge outlet
MW
-3000032-02
1
2
6 Installation
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