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1.8
Expansion vessel
The expansion vessel installed on the boilers has the following
characteristics:
Description
U/M
Total capacity
l
kPa
Prefilling pressure
bar
Useful capacity
l
Maximum system
l
content (*)
(*) Conditions of:
Average maximum temperature of the system 85°C
Start temperature at system filling 10°C.
m
CAUTION
– For systems with water content exceeding the
maximum system content (as indicated in the
table) an additional expansion vessel must be
prearranged.
– The difference in height between the relief valve
and the highest point of the system cannot exceed
6 metres. If the difference is greater than 6 metres,
increase the prefilling pressure of the expansion
vessel and the system when cold by 0.1 bar for each
meter increase.
HE Plus
24
28
35
40
9,0
10,0
100
1,0
5,0
6,0
124
140
1.9
Circulation pump
The flow-head performance curve available for the heating
system is shown in the graph below.
RESIDUAL HEAD (mbar)
600
500
400
300
200
100
0
0
200
400
m
CAUTION
The appliance is equipped with a by-pass which
ensures water circulation in the boiler when the
thermostatic valves or cocks are used in the system.
35 40
24
28
600
800
1000
1200
FLOW (l/h)
Fig. 5
107
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