Compressor 2
Only RVS61..
Line no. Operating line
2860 Lock stage 2 with DHW
Off.
On.
2861 Release stage 2 below OT
2862 Locking time stage 2
2863 Release integral stage 2
2864 Reset integral stage 2
2865 Compr sequence changeover
Lock stage 2
with DHW
It can be selec
ted whether the second compressor stage shall be locked during DHW
charging.
Off
Compressor stage 2 is released during the period of time the DHW storage tank is
charged.
On
Compressor stage 2 is locked during the period of time the DHW storage tank is
charged.
If the attenuated outside temperature lies below the set release temperature, the
second compressor stage is locked.
Release stage
2 below OT
Locking time stage 2 The second stage can be released only
when the locking time has elapsed and when
the release integral has been filled. The locking time starts to run on release of the first
compressor. Calculation of the release integral begins only on completion of the locking
time.
The locking time enables compressor 1 to reach a stable operating state before
compressor 2 is switched on. It was preset by the supplier of the compressor.
When compressor 2 is released, compressor 1 is always in operation. Compressor 2
cycles if the output of both compressors together exceeds the demand.
As soon as the locking time for the second compressor stage has elapsed, the
controller starts calculating the heat deficit, if there is any.
Release integr
al stage 2
If the release integral is filled
, the anticipated actual value is calculated on completion of
a further locking time, based on the current temperature gradient.
The second stage is released only if, on completion of the second locking time, the
actual value to be anticipated lies below the required setpoint.
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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
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