Basic Documentation

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Siemens VAV compact controller G..B181.1E/3 | VAV modular controller ASV181.1E/3 CE1P3544en
Smart Infrastructure 2021-10-26
6 Commissioning
6.1 Documentation of engineering and
commissioning
It is highly recommended to document all planning data and settings in a way that
is easily accessible after a long interval. Especially if special calculated parameters
or plant-specific adaptations had to be made during engineering and
commissioning, these should be clearly noted.
6.2 Commissioning
The type field on the VAV box usually provides information about the configuration
made in the factory.
The following notes are intended to help in the case of malfunctioning of VAV
compact controller or if parameters were changed on site:
• Check mechanical settings according to the data specified for the plant in
question, especially whether the dampers are airtight in their fully closed position
• Check direction of rotation (opening direction).
• Dampers or actuator can be manually overridden by moving the red slider for
disengaging the gear train, but only when power is turned off.
• Make certain the actuator cannot be twisted and that it cannot jam.
• Check to ensure that the tubes for measuring the differential pressure are
correctly connected.
• To check the setting values of

V
n
,

max
V
,

min
V
, the operating mode (“con”, “3P” or
“STP”) and the actuator’s opening direction (counterclockwise or clockwise), the
AST20 setting unit or ACS941 software with AST22 interface converter is
required.
If digital setpoints or control command (on, stop, off) are predefined via AST20 or
ACS941, wait one minute after disconnecting the AST20 or AST22 from the VAV
compact controller for YC, Y1 and Y2 to work as specified.
• If the “Operating mode” parameter is changed, the supply of power (AC 24 V) to
the VAV compact controller must be disconnected for a short moment, enabling
the change to become effective.
• The sensor output signal only becomes valid 2 minutes after supplying power
(AC 24 V) or after a power cut. During this time, the VAV compact controller
performs a zero-point calibration of the differential pressure sensor .
• If communication with the AST20 / AST22 is made via the YC core, the relevant
cores of parallel wired VAV compact controllers must be disconnected for the
period of time communication is active!
• For more detailed information, please refer also to AST20 datasheet [5].
Use of planning and
commissioning protocol
recommended
Devices series A and B
(as of series C,
disconnection is no longer
required)
Devices until index D