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Siemens
Standard application AHU
CE1P3977en_02
Building Technologies
Functions
01.02.2010
Parameter
Range
Function
External control
– Auto
– Off
– Stage 1
–
– Stage 2
– Stage 3
Displays current plant command from hardware
plant switch.
– Auto mode: Time switch catalog, night cooling,
etc., can switch on the plant.
– Plant off.
– Plant operating in stage 1 (using setpoint stage 1
for analog controlled plants).
– Plant operating in stage 2 (using setpoint stage 2
for analog controlled plants).
– Plant operating in stage 3 (using setpoint stage 3
for analog controlled plants).
Roomunit op mode
– Auto
– Comfort
– Standby
– Economy.
Displays present plant command from room unit
– Auto mode: Time switch catalog, night cooling,
etc., can switch on the plant.
– Plant operating in Comfort Mode.
– Plant is in standby.
– Plant operating in Economy Mode.
Night kick exh tmp
---
Starts plant to update sensor values for return-air
controlled plant and activated night cooling or Unit-
Start TmpDelta.
(Temperature difference start). Jumps to page to
parameterize night kick.
Night cooling
---
Night cooling (free cooling). Jumps to page to pa-
rameterize night cooling.
Tmp start
---
Starts plant at night based on temperature differ-
ence. Jumps to page to parameterize temperature
difference start.
Boost
---
Boost plant start. Jumps to page to parameterize
boost plant start.
Power up delay
0…36000 [s]
Delayed plant start after controller restart.
Basis Document Siemens Climatix Control System
BDCX.100820.01GB
Page 37
