© Danfoss | DCS (ADAP-KOOL®) | 2018.12
RI8SP202 | 4
DGS Installation test
As DGS is a digital device with self-monitoring, all internal errors
are visible via the LED and Modbus alarm messages.
All other error sources often have their origins in other parts of the
installation.
For fast and comfortable Installation test we recommend
proceeding as follows.
Optical Check
Right cable type used.
Correct mounting height according to definition in Mounting.
LED status – see DGS trouble shooting.
Functional test (for initial operation and maintenance)
Functional test is done by pressing the test button for more than
8 sec and observing all connected outputs (Buzzer, LED, Relay
connected devices) are working properly. After deactivation all
outputs must automatically return to their initial position
Zero-point test (if prescribed by local regulations)
Zero-point test with fresh outdoor air.
A potential zero offset can be read out by use of the Service tool.
Trip test with reference gas (if prescribed by local regulations)
The sensor is gassed with reference gas (for this you need a gas
bottle with pressure regulator and a calibration adapter).
In doing so, the set alarm thresholds are exceeded, and all output
functions are activated. It is necessary to check if the connected
output functions are working correctly (e.g. the horn sounds, the
fan switches on, devices shut down). By pressing the push-button
on the horn, the horn acknowledgment must be checked. After
removal of the reference gas, all outputs must automatically return
to their initial position.
Other than the trip testing, it is also possible to perform a
functional test by means of calibration. For further information,
please refer to the User Guide.
Comparing sensor gas type with DGS specification
The replacement sensor specification must match the DGS
specification.
The DGS software automatically reads the specification of the
connected sensor and compares with the DGS specification.
This feature increases the user and operating security.
New sensors are always delivered factory-calibrated by Danfoss.
This is documented by the calibration label indicating date
and calibration gas. A re-calibration is not necessary during
commissioning if the device is still in its original packaging (is not
air-tight protection by the red protective cap) and the calibration
certificate has not expired.
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