Siemens RVL471 - Plant Type 3 - Storage Tank with Diverting Valve; Plant Type 4 - Instantaneous D.h.w. Heating Via Heat Exchanger; Plant Type 5 - Only Electric Immersion Heater

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Siemens Building Technologies Basic Documentation RVL471 CE1P2524E
HVAC Products 3 Fundamentals 23.10.2002
3.2.11 D.h.w. plant type 3 – storage tank with diverting valve
2524S09
Y3
B31
B32
M4
K6
Charging of the d.h.w. storage tank through control of the diverting valve. Acquisition of
the d.h.w. temperature with one or 2 sensors or thermostats. Circulating pump and
electric immersion heater are optional.
3.2.12 D.h.w. plant type 4 – instantaneous d.h.w. heating via
heat exchanger
M4
2524S10
B3
Y7
N1
D.h.w. heating via heat exchanger (instantaneous d.h.w. heating) through control of the
2-port valve in the heat exchanger’s primary return. Acquisition of the d.h.w. tempera-
ture in the heat exchanger’s secondary flow. Circulating pump is optional, but strongly
recommended.
3.2.13 D.h.w. plant type 5 – only electric immersion heater
M4
2524S11
K6
Charging of d.h.w. storage tank only through release of the electric immersion heater.
No control of d.h.w. heating by the controller. Circulating pump is optional.
A6 Room unit QAW50 or QAW70 E2 Consumer (space)
B1 Flow / boiler sensor LPB Data bus
B3 D.h.w. flow sensor K6 Electric immersion heater
B31 Storage tank sensor / thermostat 1 M1 Heating circuit pump / circulating pump
B32 Storage tank sensor / thermostat 2 M3 Charging pump
B5 Room sensor M4 Circulating pump
B7 Return sensor (primary circuit) N1 Controller RVL471
B71 Return sensor (secondary circuit) Y1 Heating circuit mixing valve
B9 Outside sensor Y3 Diverting valve
E1 Heat source (boiler / heat converter) Y7 D.h.w. mixing valve