12
8. Dimensions
9. Hydraulic data
440
450 mini pour entretien
Fig. 8
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
I
Safety valve C/H and condensate
J
Heating flow
K
Cylinder return (System Plus only)
L
Gas supply
M
Cold water supply
N
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)
Pump Head Graph (15/50 & 15/60)
Fig. 9
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
C litre
Central heating initial pressure when cold (in bar)
System capacity chart
Fig. 10
162
Содержание Benchmark System A 24 RFF
Страница 18: ...18 1 2 A A Fig 13 Fig 15 Fig 12 11 Installing the Boiler continued Fig 14 P P ...
Страница 21: ...21 Fig 20 Fig 21 Fig 22 162 ...
Страница 30: ...30 WIRING DIAGRAM FOR CONNECTION TO AN OPEN VENTED CYLINDER DIAGRAM B ...
Страница 31: ...31 WIRING DIAGRAM FOR CONNECTION TO AN MTS UNVENTED CYLINDER DIAGRAM A ...
Страница 60: ...60 ...