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Siemens Building Technologies Basic Documentation RVA63.242, RVA53.242 CE1P2373E
Landis & Staefa Division Application examples 26.03.2001
7.5 Legend to plant types
A6 Room unit bus (PPS)
B1 Flow sensor mixing valve
B2 Boiler sensor
B3 D.h.w. sensor / control thermostat
B31/H2 D.h.w. sensor 2 / contact H2 / buffer storage tank sensor 2
B4 Buffer storage tank sensor
B7 Return sensor
B8/B6 Flue gas sensor / collector sensor
B9 Outside sensor
DB Data bus (LPB)
H1 Changeover contact
MB Ground bus (LPB)
MD Ground room unit bus (PPS)
M Ground sensors
E1 Hours run burner stage 1
F1 Phases K6 and Q3/Y3
F2 Phase Y1 and Y2
F4 Phase burner stage 1
F5 Phase burner stage 2
F6 Phases Q2 and K7
K4 Burner stage 1
K5 Burner stage 2
K6 Multi-functional output
K7 Multi-functional output
L Live AC 230 V (mains connection)
N Neutral (mains connection)
Q2 Heating circuit pump
Q3/Y3 D.h.w. charging pump / d.h.w. diverting valve
Y1 Mixing valve OPEN
Y2 Mixing valve CLOSED
Low voltage side
Mains voltage side
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