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Siemens Switzerland Ltd
User manual RVS61.843 CE1U2355en_02
HVAC Products 6 The settings in detail 23. November 2007
Collector pump 2 Q16
For control of the circulating pump of a second solar collector circuit.
Solar pump ext exch K9
For the external heat exchanger, solar pump “Ext heat exchanger K9“ must be set at
the multifunctional relay output (QX).
If both a DHW and a buffer storage tank are available, operating line 5841 “External
solar exchanger“ must also be set.
Solar ctrl elem buffer K8
If several heat exchangers are used, the buffer storage tank must be set at the
respective relay output and, in addition, the type of solar controlling element must be
defined on operating line 5840).
Solar ctrl elem swi pool K18
If several heat exchangers are used, the swimming pool must be set at the respective
relay output and, in addition, the type of solar controlling element must be defined on
operating line 5840).
El imm heater buffer K16
The relay is used for the control of an electric immersion heater in the buffer storage
tank.
Important!
Electric immersion heaters must be fitted with a safety limit thermostat.
H1 pump Q15
Pump H1 can be used for an additional consumer. Together with an external request
for heating / cooling at input H1, the application is suited for an air heating coil / air
cooling coil, for instance. The pump’s overrun time is always 1 minute.
H2 pump Q18
Pump H1 can be used for an additional consumer. Together with an external request
for heating / cooling at input H2, the application is suited for an air heating coil / air
cooling coil, for instance. The pump’s overrun time is always 1 minute.
H3 pump Q19
Pump H1 can be used for an additional consumer. Together with an external request
for heating / cooling at input H3, the application is suited for an air heating coil / air
cooling coil, for instance. The pump’s overrun time is always 1 minute.
Heat circ pump HCP Q20
The relay is used for the control of heating circuit pump Q20.
2. Pump speed HC1 Q21 / HC2 Q22 / HCP Q23
This function facilitates the control of a 2-speed heating circuit pump, allowing the
pump’s capacity to be lowered in Reduced mode (e.g. during night setback). In that
case, after pump speed 1, pump speed 2 is switched on as follows via “Multifunctional
relay RX“:
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