Compressor 2 - Siemens Albatros2 User Manual

LP delay on startup

Compressor 2

Lock stage 2 with DHW
Release stage 2 below OT
Locking time stage 2
Release integral stage 2
Siemens Switzerland Ltd
HVAC Products
When starting the compressor, no consideration is given to the low-pressure switch
(E9) during the period of time set here.
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
It can be selected 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.
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 compressor supplier.
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.
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.
User manual RVS61.843
6 The settings in detail
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CE1U2355en_02
23. November 2007