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Siemens Building Technologies
Basic Documentation RVP540 / RVP550
CE1P2488en
HVAC Products
Handling
18.10.2002
Designation of relays and sensors
Relays
Function (use)
K1
Heat pump stage 1
K2
Heat pump stage 2
K3
Release of external wood-fired boiler
K4
Oil- / gas-fired boiler stage 1
K5
Oil- / gas-fired boiler stage 2
K6
Electric immersion heater for d.h.w.
K8
Solar collector pump or diverting valve heat exchanger 2
K¯8
Inverted K8 signal
K9
Solar bypass valve or heat exchanger pump
K¯9
Inverted K9 signal
K10 Alarm
output
K11 Overtemperature
protection
K¯11
Inverted K11 signal
K12
Solar collector pump or diverting valve heat exchanger 1
K13
Output K13 for free time switch program
K14
Release for external oil- / gas-fired boiler
K15
Release of external heat pump
K16
Electric immersion heater of buffer storage tank
K17
Flue gas temperature sensor function
K18
Output for solar swimming pool heating
K¯18
Inverted K18 signal
Y1
Mixing valve heating circuit OPEN
Y2
Mixing valve heating circuit CLOSED
Y4
Heat generation lock
Y¯4
Inverted Y4 signal
Y7
Maintained return temperature oil / gas OPEN
Y8
Maintained return temperature oil / gas CLOSED
Y9
Maintained return temperature wood OPEN
Y10
Maintained return temperature wood CLOSED
Y14
Diverting valve partial storage tank charging
Y¯14
Inverted Y14 signal
Y15
Diverting valve return diversion
Y¯15
Inverted Y15 signal
Q1
Pump of oil- / gas-fired boiler
Q2
Heating circuit pump
Q3
D.h.w. charging pump
Q¯3 Inverted
Q3
signal
Q4 D.h.w.
circulating
pump
Q5
Solar collector pump 1
Q8
Water / brine pump
Q9
Heat pump circulator
Q10
Pump of the wood-fired boiler
Q11
Storage tank transfer pump
Q12
Oil / gas bypass pump
Q13
D.h.w. storage tank transfer pump
Q14 System
pump
Q15 Pump
H1
Q16
Solar collector pump 2
Q17
Additional pump Q17 for heat pump stage 1
E1
Multifunctional mains input
L
Mains live conductor
N Mains
neutral
conductor
Relay designations