User Manual

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Building Technologies Integration von DESIGO™ RXC in VISONIK CM2Z8338en_01
Building Automation Integration functions 12.06.2006
3.2.5 Night purge
All VAV applications, FPB05
VISONIK BPS NIDES.RX RXC controller
DP.Parameter Function/Range NV name / element Function/Range
BT
User designation NV name NV element
@TCRn.SOPST → nvoUseSchedule See table of bindings → 1 Building Use Scheduler nviUseSchedule Current state
@TCRn..RRTP → nvoOccSchedule See table of bindings → 1 Occup Scheduler nviOccSchedule Current state
@TCRn.SPRH
See table of bindings
→ nvoApplicMode See table of bindings →
1
Application Mode nviApplicMode
Table of bindings
@TCRn.SOPST=4 @TCRn.RRTP > (@TCRn.SPRH-1)
SOPST remains at 4
@TCRn.RRTP ≤ (@TCRn.SPRH-1)
SOPST goes to 3 (Standby)
Building Use Scheduler
OCC_OCCUPIED OCC_UNOCCUPIED
Occup Scheduler
OCC_UNOCCUPIED OCC_UNOCCUPIED
Application Mode
HVAC_NIGHT_PURGE HVAC_AUTO
The night purge function is activated by the operating state command @TCRn.SOPST=4. The mode is canceled when the current room temperature @TCRn.RRTP falls to 1K
below the reduced heating setpoint @TCRn.SPRH.
Caution If the room is subject to a time scheduler @DSTy , and if the Night Purge function is not activated by this function, it is important to ensure that the parameter
@DSTy.MODE is set to 0, as otherwise, the parameter @TCRn.SOPST will immediately be overwritten with another value.
Caution The NV “Application Mode” is also used to specify the controller operating mode (e.g. changeover). Since the last-received value is always valid in the RXC
controller, the functions can influence each other mutually.