For more information, see
Electrical connection: 1 1 direct c 1 underfloor
heating c 1 domestic hot water tank, page 51
5.6.3
Connection diagram: Boilers in c 1 direct circuit
+ 1 underfloor heating c 1 domestic hot water tank
Fig.32
Boilers in c 1 direct c 1 underfloor heating c 1 domestic hot water tank
MW-3000020-04
T
30
38
38
31
124
9
16
24
25
T
T
S
9
9
123
27
26
33
44
61
9
9
93
2
35
30e
27
27
9
117
27
34
27
34
65
64
7
3
7
18
27
9
3
T
2 Heating pump direct circuit
3 4 bar (0.4 MPa) safety valve
7 Automatic air vent
9 Isolation valve
16 Closed expansion vessel
18 Heating circuit fill point
24 Domestic hot water tank exchanger primary inlet
25 Domestic hot water tank exchanger primary outlet
26 DHW load pump
27 Non-return valve
30 Calibrated and sealed safety unit
30e Drain valve
31 Independent domestic hot water tank
33 Domestic hot water temperature sensor
34 Modulating boiler pump
35 Low-loss header
38 Remote control with or without room temperature
sensor
44 Safety device to safeguard against overheating of
the underfloor heating system, in accordance with
prevailing regulations
61 Thermometer
64 Direct heating circuit (example: radiators)
65 Heating circuit with mixing valve, may be low
temperature heating circuit (underfloor heating or
radiators)
93 Heating pump for underfloor heating circuit
117 Three-way mixing valve
123 Cascade return sensor
124 Cascade flow sensor
For more information, see
Electrical connection: Boilers in c 1 direct c 1
underfloor heating c 1 domestic hot water tank, page 53
5 Before installation
34
7609493 - v08 - 24072018