Siemens RVS41.813 User Manual page 129

Delay 3-ph current error
Delay flow switch
source / consumers
Release above OT
For forced buffer storage
tank charging
Full charging of buffer
storage tank
Siemens Switzerland Ltd
HVAC Products
The compressor is switched off if the 3-phase current error is constantly present for the
period of time set here. On completion of "Min off time", the heat pump is switched on
again. If, within "Duration error repetition", the 3-phase current error occurs again for at
least the delay time, the heat pump will initiate lockout, if the permitted preset number
of faults has been exceeded.
The compressor is switched off if the flow switch signal is constantly present during the
period of time set here. On completion of "Min off time", the heat pump is switched on
again. If, within "Duration error repetition", the flow switch trips again, the heat pump
initiates lockout, if the permitted preset number of faults has been exceeded.
If the relevant input EX1 – EX7 is configured for use with a pressure switch, a fixed
delay of 3 seconds applies.
The heat pump is released only when the composite outside temperature lies above the
value set here. Below this outside temperature level, the amount of heat required must
be delivered by some other heat source (bivalent operation). This prevents poor
efficiency and thus uneconomical operation of the heat pump.
Forced storage tank buffer charge is used to required a forced charge of the storage
tank independent of demand (e.g. during low tariff period).
The heat pump switches on for a pending storage tank forced charge if the heat pump
is released via the parameter for forced storage tank buffer charge . It maintains the
minimum off time as well as any active minimum runtime for the heat pump.
Locked
The heat pump is not put into operation for forced buffer storage tank charging.
Released
The heat pump can be put into operation for forced buffer storage tank charging.
The buffer full charge applies to heating only. It triggers when the storage requirement
is missing to an automatic heat generation lock . The full charge extends the runtime of
the heat pump.
User manual RVS61.843, RVS41.813
6 The settings in detail
129/258
CE1U2355en_02
28. September 2009