6.2
One one underfloor heating c one direct c one domestic hot water tank
6.2.1
Hydraulic connection
Fig.55
1 underfloor heating c 1 direct c 1 domestic hot water tank
MW-3000019-05
30
T
7
7
31
24
25
33
9
9
1a
35
2a
119
30e
7
16
27
18
38
38
9
T
S
44
61
93
2
27
27
9
117
65
64
9
9
26
27
2c
27
34
1
3
1 Boiler flow
1a Heating flow
2 Heating pump
2a Heating return
2c Three-way valve bypass
3 6 bar (0.6 MPa) safety valve
7 Automatic air vent
9 Isolation valve
16 Closed expansion vessel
18 Heating circuit fill point
(France: with disconnector according to prevailing
regulations)
24 Domestic hot water tank exchanger primary inlet
25 Domestic hot water tank exchanger primary outlet
26 DHW booster pump
27 Non-return valve
30 Calibrated and sealed safety unit
France: (7 bar (0.7 MPa) - with opening on the
discharge pipe)
30e Drain valve
31 Independent domestic hot water tank
33 Domestic hot water temperature sensor
34 Modulating boiler pump
35 Low-loss header (optional)
38 Remote control with or without room temperature
sensor
44
France: 65 °C safety thermostat with manual reset
for underfloor heating (DTU 65.8, NF P52-303-1)
Austria: safety device to safeguard against
overheating: according to the type of underfloor
heating
Other countries: safety device to safeguard
against overheating of the underfloor heating, 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
119 Boiler return
6 Connecting diagrams and configuration
48
7702639 - v03 - 10072018