Water Tank - Baxi POWER HT+ Series Installation And Service Manual

Fig.33 Boilers in cascade + 1 direct circuit + 1 underfloor heating circuit + 1 domestic hot water tank
7
9
34
3 27 3
2 Heating pump direct circuit
3 4 bar safety valve (0.4 MPa)
7 Automatic air vent
9 Isolation valve
16 Closed expansion vessel
18 Filling the heating circuit
24 Domestic hot water tank exchanger primary inlet
25 Primary exchanger outlet domestic hot water tank
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
35 Low-loss header
7609474 - v02 - 04092014
38
9
34
27
7
T
123
30e
5 5 .7.3 Connection diagram: Boilers in cascade + 1 direct circuit + 1
underfloor heating circuit + 1 domestic hot water tank
64
61
T
27
2
117
9
T
27
35
9
16
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 tem­
perature heating circuit (underfloor heating or radia­
tors)
85 Modulating boiler pump
93 Underfloor heating circuit heating pump
117 3-way mixing valve
123 Cascade return sensor
124 Cascade flow sensor
44
38
65
S
33
27
93
T
24
9
26
9 27
18
25
30
5 Before installation
31
MW-3000020-01
35