Ariston System A 30 RFF Manual Do Utilizador

440

450 mini pour entretien

54 54 54 54

JK L M N

I

JK L M N

32

296

141

289

21

7

2

0

6

9

1

,5

121,5

I

172,5

4,7

All dimensions in mm

With packaging :

24 kW : 34 kg
30 kW : 37 kg

390

minimum space required 450

Safety valve C/H and condensate

Heating flow

Cylinder return (System Plus only)

Gas supply

Cold water supply

Heating return

296 (24 kW)
360 (30 kW)

The boiler is fitted with an automatic by-pass as standard.

The graph (Fig. 9) shows the development of the pressure
available in relation to flow (on exit from the boiler 

∆

T

20°C).

To ensure correct operation, the minimum flow of the
appliance must be 300 l/h. (Thermostatic taps closed).

Capacity of the installation.

The water heater is fitted with a pressurised expansion
vessel.

Volumes : 

6 litres

Pressure: 0,7 bar.

The volume of the expansion vessel in a pressurised
appliance varies according to:

- the average operating temperature in °C

- the static height, which is the difference in metres
between the highest point of the appliance and the
expansion vessel axis).

The minimum cold filling pressure of the appliance is 1 bar
(recommended pressure between 1.2 and 1.7 bar).

The pressure of the expansion vessel should always be
greater than the static height (in metres) divided by 10.

0

0.05

0.1

0.15

0.2

0.25

0.3

0.35

0.4

0.45

0

200

400

600

800

1000

1200

1400

24 kW

30 kW

P

re

s

s

u

re

 (

b

a

r)

flow rate (l/hr)

20

40

60

80

100

120

Pf

140

160

180

200

220

240

1,0

1,1

1,2

1,3

1,4

1,5

1,6

1,7

1,8

1,9

2,0

Capacité maximale de l'installation (en litres)

260

Pression à froid pour le circuit chauffage (en bar)

280

40

°

C

50

°

C

60

°

C

70

°

C

80

°

C

Central heating initial pressure when cold (in bar)

162