Pressure Switch; Expansion Vessel; Connecting Dhw Pipes - REMEHA Avanta 24c Installation And Service Manual

Remeha Avanta Plus
fig. 10

Connecting DHW pipes

LT.AL.W7H.000.015
127768-271011
2.3.6

Pressure switch

A pressure switch is fitted in the boiler set to minimum operat-
ing pressure of the boiler of 0.6 bar. If the water pressure in
the boiler drops below 0.6 bar, the pressure switch wil lock the
boiler and error code e9 appears in the display. When the
central heating system has been refilled, the boiler has to be
reset manually.
2.3.7

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.

Install additional vessel according BS 5449, part1.
boiler Safety Valve Setting
(bar)
Vessel Charge (Bar)
Heating System Water Content
(Litres)
100
125
150
175
200
250
300
For other system volumes, mul-
tiply the system volume by the
factor across:
table 01 Expansion Vessel Size
2.3.8 Connecting DHW pipes
(For combi type only)
• F it the outlet pipe for hot water to the DHW outlet  15
mm Ø connection.
• F it the inlet pipe for cold water to the DHW inlet  15 mm
Ø connection.

• The DHW pipes must be connected in accordance with
current regulations.
• For plastic pipes, follow the manufacturer's instructions
(for connection).
LTALW7H000015b
2. Installation
3.0
0.5 1 1.5
Expansion Vessel Size
(Litres)
4.8 8.0 13.3
6.0 10.0 16.6
7.2 12.0 20.0
8.4 14.0 23.3
9.6 16.0 26.6
12.0 20.0 33.3
14.4 24.0 39.9
0.048 0.080 0.133
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