13
2.3.6 Expansion vessel
An 8 litre expansion vessel (with the vessel charge set to 1.0
bar) is fitted as standard within the boiler case and is suitable
for use in a heating system with a water content up to 100
litres, operating at a flow temperature of 80°C, a maximum
pressure of 3 bar and a maximum system static head of 5
metres above the boiler. If the system water content is greater
than 100 litres, or the system static head above the boiler is
greater than 5 m, an additional vessel must be installed in the
system to allow for the increase in expansion,
see table 01.
m
Install additional vessel according BS 5449, part1.
Boiler Safety Valve Setting
(Bar)
3.0
Vessel Charge (Bar)
0.5
1
1.5
Heating System Water Content
(Litres)
Expansion Vessel Size
(Litres)
100
4.8
8.0
13.3
125
6.0
10.0
16.6
150
7.2
12.0
20.0
175
8.4
14.0
23.3
200
9.6
16.0
26.6
250
12.0
20.0
33.3
300
14.4
24.0
39.9
For other system volumes,
multiply the system volume
by the factor across:
0.048
0.080
0.133
table 01 Expansion Vessel Size
2.3.7 Connecting DHW pipes (Combi-type only)
LT.AL.W7H.000.015
•
Fit the outlet pipe for hot water to the DHW outlet
¢
15 mm
Ø connection.
•
Fit the inlet pipe for cold water to the DHW inlet
15 mm
Ø connection.
z
•
The DHW pipes must be connected in accordance with
current
regulations.
•
For plastic pipes, follow the manufacturer’s instructions
(for
connection).
Summary of Contents for Avanta Plus 24s
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