continues to operate if demand from room heating exists. The flow temperature is not
monitored during the stabilization period. The compressor switches off after reaching
the maximum switch off temperature after the stabilization period expires.
Maximum switch off temperature with negative reduction
Temperature demand
consumer
Stufe1
Reduction max.
switch off temperature
0°C
max. switch off temperature
DHW
charge
SD
Komp
Stabilization period
Behavior with 2 compressors
If the flow or return temperature approaches the maximum switch-off temperature,
compressor 2 should be switched off before compressor 1 reaches its limitation. For
this reason, compressor 2 always switches off at the maximum switch-off temperature
minus the reduction and no status message will appear.
Only the second stage is initially switched off if a negative reduction is parameterized
and both compressor stages are operating for one DHW charge. The flow temperature
is not monitored during the stabilization period. The DHW charge is cancelled with the
flow temperature once again exceed the switch-off temperature after the stabilization
period expires.
Only the second stage is initially switched off if a negative reduction is parameterized
and both compressor stages are operating for room heating. The flow temperature is
not monitored during the stabilization period. The first stage is also switched off if the
flow temperature once again exceeds the switch-off temperature after the stabilization
period expires.
Note:
The flow temperature under the circumstances described above is not monitored
during the stabilization period if a negative value is entered for parameter 2845 "Red
switch-off temp max"! (Other monitoring functions such as hot gas, high-pressure, etc.
are not effected).
LP delay on startup
When starting the compressor, no consideration is given to the low-pressure switch
(E9) during the period of time set here.
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Siemens Switzerland Ltd
User manual RVS61.843, RVS41.813
CE1U2355en_02
HVAC Products
6 The settings in detail
28. September 2009