BWT AQA drink 1 CAS Installations- Und Bedienungsanleitung Seite 23

The CO2 gas concentration is calculated as follows:
The following overview shows the required room volumes for common CO2 cylinder sizes (calculated on
the basis of a CO2 gas density of 2 kg/m³):
CO2 gas concentration in the room (vol. %)
CO2 cylinder
Content [m³] Content [l]
content [kg]
2 1
3 1.5
5 2.5
6 3
10 5
If the calculated gas concentration of 3 % is
exceeded, the following measures are possible:
» Use of a smaller CO2 gas cylinder
» Increase in the size of the room (e.g. by
removing doors)
» Installation of a CO2 gas warning device in
accordance with DIN 6653–2
» Installation of technical ventilation
Installing
Note!
A functional check of the gas pressure reducer
should be carried out before installing the CO2
cylinder.
The CO2 pressure should be set to approx. 1 bar
above the water pressure of approx. 2 bar, i.e.,
approx. 3 bar.
Functional check and connection
1 Check the gas pressure reducer for visible
external damage (1)
2 Screw the gas pressure reducer onto the CO2
cylinder
3 Close the shut-off valve (2)
4 Open the pressurised gas cylinder valve and
close it again (3)
5 Check for leaks
6 Open the pressurised gas cylinder valve again (3)
7 Use the adjusting screw (4) to set the working
pressure to approx. 3 bar (5) – green mark
=
Room volume required for
safety reasons [m³]
1000 35
1500 51
2500 85
3000 105
5000 170
Fig. 7: Connecting the pressurised CO2 gas cylinder
8
9
10 Use the adjusting screw (4) to increase the pres-
11 Close the pressurised gas cylinder valve (3) im-
12 Open the pressurised gas cylinder valve (3) again
13 Connect the hose to the gas pressure reducer (6)
14 Connect the hose to the CO
15 Open the shut-off valve (2)
Gas volume or cylinder content (m³)
Room volume (m³)
Room surface area required for
safety reasons [m²]
(for a room height of 2.5 m)
1 5
1
4
Use the adjusting screw (4) to increase the pres-
sure to 7 bar – red marking (5)
Use the adjusting screw (4) to slowly increase
the pressure step by step until a slight blow-off
begins
sure further until the safety valve opens fully with
a loud noise. Observe the pressure gauge (5); this
should not exceed a value of approx. 7.7 bar
mediately afterwards and turn the adjusting
screw (4) back to 0 bar to prevent icing
and set the correct working pressure of 3 bar (4)
dispenser
EN
13.5
14.4
34
41
68
1 3
2
6
inlet of the water
²
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