sauter ASV 52 Series User manual

ASV VAV compact
controller
Maintenance manual
52 ASVxxx

Contents
52 ASVxxx
3
Contents
Contents 3
List of changes.............................................................................................4
List of figures ...............................................................................................5
List of symbols.............................................................................................6
1Preface....................................................................................................7
2Safety instructions.................................................................................8
3Procedure...............................................................................................9
3.1 Visual inspection of the VAV box and the ASV compact controller9
3.2 Mechanical inspection of the VAV compact controller.................10
3.3 Testing the damper using the CASE VAV parameterising software11
3.4 Measurement of the duct pressure..............................................11
3.5 Zero adjustment of the differential pressure transmitter in the ASV
and comparison of the measured value .................................................12
3.6 Measuring the volume flow at max and min ..................................12
4Completion of service..........................................................................13
4.1 Service report .............................................................................13
5Procedure diagram ..............................................................................14

List of changes
452 ASVxxx
List of changes
Date
Rev./Ver. issue
Change
Section
Page

List of figures
52 ASVxxx
5
List of figures
Fig. 1: Checking the ASV supply lines............................................................9
Fig. 2: Mounting the ASV on the VAV box....................................................10
Fig. 3: Releasing the lock.............................................................................11
Fig. 4: Procedure diagram............................................................................14

List of symbols
652 ASVxxx
List of symbols
Information
Information relevant to handling the product.
Internet link
Reference to links or applications on the internet.
Warning instruction
Warning instructions are written in front of the action.

Preface
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1Preface
These instructions are a guide to carrying out maintenance on the ASV VAV
compact controller. They contain information on the individual maintenance
operations and help on filling in the service report. As before, the VAV boxes
must also be included in the maintenance.
These maintenance instructions cover the following products: ASVxxx VAV
compact controllers.
Required information and materials
1) Access to the device/cabinet
2) Commissioning certificates of the installed and operated ASVs
3) Room specifications (if available)
4) Latest CASE VAV software
5) Laptop
6) USB to RS-485 converter
7) 2 x T-hose 8x1
8) Hose
9) Calibrated differential pressure measuring device

Safety instructions
852 ASVxxx
2Safety instructions
All work must be done by trained specialist staff.
Work on electrical systems or equipment may only be carried out by a
qualified electrician or by instructed persons under the guidance and
supervision of a qualified electrician, in accordance with the regulations of
electrical engineering.
All local regulations and safety precautions must be strictly observed during
maintenance.
WARNING: moving parts can cause hand injuries.

Procedure
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3Procedure
3.1 Visual inspection of the VAV box and the ASV compact controller
Carry out a visual inspection of the VAV box and the VAV controller. Look
out for damage, dents and leaks on the VAV box and compact controller.
Check that the supply lines to theASV and the VAV box are correctly laid
(see the ASV fitting instructions, Fig. 4.2). There must not be any kinks in
the power cable or hoses. Note down any damage, anomalies or improper
modifications.
Fig. 1: Checking the ASV supply lines

Procedure
10 52 ASVxxx
3.2 Mechanical inspection of the VAV compact controller
Check the VAV box and the VAV controller. Make sure the ASV is firmly
mounted on the VAV box and damper adapter is correctly seated. Tighten
the screw fittings and check the tightening torque of the fixing screw (see
ASV fitting instructions, Fig. 4.1 steps 7, 8 and 9). Remove any dirt, dust
and accumulated deposits.
Fig. 2: Mounting the ASV on the VAV box
Check the electric contact terminals at the end of the power cable and
tighten them.

List of symbols
52 ASVxxx
11
The next step is to check that the damper moves easily. Release the
damper lock on theASV and move the damper in both directions as far as
it will go. You should be able to move the damper without much effort. If
not, try to unjam the damper by moving it back and forth. If the damper will
not move, repair it.
Fig. 3: Releasing the lock
Note: Most VAV boxes (e.g. Trox) do not need any maintenance.
Note down any improper modifications and eliminate them.
3.3 Testing the damper using the CASE VAV parameterising software
Connect the ASV unit to the PC with the USB-RS-485 adapter and start up
the latest CASE VAV software. Use the SLC protocol to connect to the
VAV compact controller. The current SLC address of the device can be
found in the commissioning protocol. First adjust the angle of rotation on
the ASV and note down the working range. Then use the “Manual
operation” function and set the damper to “Open” and “Closed”. You can
see the position of the damper blade from outside using a marking on the
damper spindle. If not, you can derive the position of the damper blade
using the actual values of the volume flow. The maximum volume flow
must be reached when the damper is open. If the function is not
completely working, you can use the “Angle of rotation” and “Adjust angle
of rotation” functions to move to the two limit switches of the actuator and
calculate the angle of rotation again. Test the damper again.
If the end positions (open, closed) are still not reached, release the lock of
the ASV 115 and check the alignment of the damper adapter to the
damper blade (see Fig. 2).
Note down the results.
3.4 Measurement of the duct pressure
In manual mode, completely close the damper of the VAV box and use the
T-hoses to connect the pressure gauge on the (+) hose to the differential
pressure outlet of the VAV box. Measure in relation to atmospheric

Procedure
12 52 ASVxxx
pressure, i.e. do not connect the (–) hose. Note down the measured duct
pressure in the service report. If the pressure is too low, check whether the
damper is properly closed.
If the damper is completely closed but the duct pressure is still too low,
check the current operating status of the ventilation system.
3.5 Zero adjustment of the differential pressure transmitter in the ASV and comparison of the
measured value
Loosen the supply hoses on the compact controller and make sure the
ends of the hoses or the connectors are not exposed to air flow. Then
select the “Zero adjustment” function in the CASE VAV software.
After that, reconnect the hoses, the ASV and the pressure gauge to the T-
hose. To do this, make a branch of the (+) hose and the (–) hose to the
external measuring device. At 50% damper position, carry out calibration
measurement using the angle of rotation identified in step 3. Compare the
value measured by the external pressure gauge to that of the ASV and
note them down.
Only use certified measuring equipment.
Observe the stated error of the measuring instrument and note it down
along with the recorded measured value.
If there are still measured values outside the tolerance range, make a
control measurement at local atmospheric pressure. To do this, remove
the hoses again and select the “Online values” option in CASE VAV.
Compare the measured value with the calibration device. Note down the
results in the service report.
Leave the external testing equipment connected to the T-hose and the
VAV for step 6.
3.6 Measuring the volume flow at max and min
In manual CASE VAV mode, set the maximum and then the minimum
volume flow via the VAV box. Compare the online values and those of the
external test equipment to the values stated in the commissioning
certificate. If the values are outside the specified tolerance range, check
the direction of operation of the actuator. Then repeat the measurement.
Another action is to compare the c-factor of the VAV box to the value set in
CASE VAV. If there is a change, note it down. Then remove the external
pressure gauge and return the VAV to operating status and check the
measured values at max and min again.

List of symbols
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4Completion of service
4.1 Service report
To complete the service, print out the configuration certificate by selecting
File > Print configuration certificate, and attach it to the service report.
Update the XML backup file and the commissioning/configuration
certificate of the compact VAV controller.

Procedure diagram
14 52 ASVxxx
5Procedure diagram
Fig. 4: Procedure diagram