Dimensions; Hydraulic Data - Ariston Benchmark System A 24 RFF Installation And Servicing Instructions

8. Dimensions

162
141
296
296 (24 kW)
360 (30 kW)
Fig. 8

9. Hydraulic data

Pump Head Graph (15/50 & 15/60)
0.45
0.4
0.35
0.3
0.25
0.2
0.15
0.1
0.05
0
0 200 400
Pf Pression à froid pour le circuit chauffage (en bar)
Central heating initial pressure when cold (in bar)
2,0
1,9
1,8
1,7
1,6
1,5
1,4
60°C
1,3
70°C
1,2
80°C
1,1
1,0
20 40 60 80 100
System capacity chart
Capacité maximale de l'installation (en litres)
12
289
4,7
I
54 54 54 54
J K L M N
30 kW
24 kW
600 800 1000 1200
flow rate (l/hr)
40°C
50°C
120 140 160 180 200 220 240
All dimensions in mm
21
172,5
I
121,5
J K L M N
32
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 :
Pressure: 0,7 bar.
1400
The volume of the expansion vessel in a pressurised
appliance varies according to:
Fig. 9
- 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.
260 280
C litre
Fig. 10
I Safety valve C/H and condensate
Heating flow
J
K Cylinder return (System Plus only)
Gas supply
L
Cold water supply
M
Heating return
N
With packaging :
24 kW : 34 kg
30 kW : 37 kg
minimum space required 450
450 mini pour entretien
440 390
6 litres