Boilers In Cascade + One Underfloor Heating Circuit + One Direct Circuit + One Domestic Hot Water Tank; Hydraulic Connection - DeDietrich IX 245-130 Installation, User And Service Manual

6 Connecting diagrams
6.3 Boilers in cascade + one underfloor heating circuit + one direct circuit + one domestic hot water
tank
Fig.57 Boilers in cascade + 1 underfloor heating circuit + 1 direct circuit + 1 domestic hot water tank
7
9
34
3
27
3
167
201 200
2 Heating pump direct circuit
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 (primary pump)
35 Low-loss header
38 Remote control with or without room temperature
sensor
50 IX
38
9
124
34
27
7
167
T
123
30e
6.3.1

Hydraulic connection

64
61
T
27
2
117
T 9
27
35
9
16
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 Mixed circuit flow sensor
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
167 Boiler control panel
200 Lead boiler
201 Slave boiler
44
38
65
S
27
33
93
T
24
9
26
18 9 27
25
9
30
7702684 - v04 - 05092019
31
MW-3000020-06