1. Detach the precut attachment in the top panel.
2. Secure the attachment against the wall using the screw and plug
provided in the accessories bag.
5.6
Hydraulic connections
5.6.1
Special precautions for the connection of the heating
circuit
When making the connection, it is imperative that the standards and
corresponding local directives be respected.
If components made from composite materials are used (polyethylene
connection pipes or flexible hose), we recommend components with an
anti-oxygen barrier.
Install an automatic air vent at the highest point on the heating circuit.
If the direct circuit is connected to radiators fitted with thermostatic
valves, install a differential valve to ensure flow.
If the heating circuit is connected to underfloor heating, connect a safety
thermostat (option HA255).
If the underfloor heating also includes a cooling function, connect a
condensation detection sensor (option HK27).
Check that the volume of the expansion vessel is appropriate for the
volume of water in the heating circuit. To do this, refer to the DTU 65–11
and use the maximum circuit temperature in heating mode or, failing
this, at a minimum of 55 °C.
If the volume of the integrated expansion vessel (12 l) is not sufficient,
add an external expansion vessel on the heating circuit.
Volume of the expansion vessel
Tab.20 Underfloor heating type installation: maximum temperature of 40 °C
Static height
Expansion vessel
inflation valve pres
sure
Volume of the expansion vessel depending on the volume of the installation (in li
tres)
75
100
125
150
175
200
225
250
5 m
1 bar
7
7
8
8
8
9
9
9
10 m
1.3 bar
7
8
8
9
9
10
10
11
15 m
1.8 bar
10
10
11
11
12
13
13
14
Tab.21 Radiator type installation: maximum temperature of 70 °C
Static height
Expansion vessel
inflation valve pres
sure
Volume of the expansion vessel depending on the volume of the installation (in li
tres)
75
100
125
150
175
200
225
250
5 m
1 bar
8
9
10
11
12
13
14
15
10 m
1.3 bar
9
11
12
13
14
15
16
17
15 m
1.8 bar
12
13
15
16
18
19
21
22
5.6.2
Special precautions for the connection of the domestic
hot water circuit
Connecting the domestic water
All the components required for connection of the domestic water circuit
are built into the indoor module:
A non-return valve in the domestic cold water circuit
Fig.42
MW
-1
0
0
1
5
7
6
-1
1
2
5 Installation
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