VSA24-Sx -Dx
1 Introduction
This quick guide will assist you in starting up the unit. Follow
the safety notices or injury to health or property damage may
occur. Carefully read the original operating instructions in-
cluding information on maintenance and troubleshooting
prior to startup. These are located on the included CD and on-
line at
Please direct any questions to:
Bühler Technologies GmbH
Harkortstraße 29
40880 Ratingen
Germany
Tel.: +49 (0) 21 02 / 49 89-0
Fax: +49 (0) 21 02 / 49 89-20
These operating instructions are a part of the equipment. The
manufacturer reserves the right to change performance-, spe-
cification- or technical data without prior notice. Please keep
these instructions for future reference.
1.1 Intended Use
The capacity sensor VSA 24 is used to monitor the filter capa-
city in oil circuits. A microprocessor-controlled pressure sensor
monitors the dynamic pressure upstream from the filter ele-
ment which increases as the filter contamination increases, or
the pressure drop above the filter element. The device is
equipped with a temperature monitor and delay to prevent
false alarms due to high viscosity during the cold start phase.
WARNING
All device models are solely intended for industrial applica-
tions. They are not safety components. The devices must not
be used if failure or malfunction thereof jeopardises the
safety and health of persons.
Use in explosive areas is prohibited.
1.2 Contents
• Capacity sensor VSA 24-S
• Product documentation
2 Safety instructions
The equipment must be installed by a professional familiar
with the safety requirements and risks.
Be sure to observe the safety regulations and generally applic-
able rules of technology relevant for the installation site. Pre-
vent malfunctions and avoid personal injuries and property
damage.
The operator of the system must ensure:
• Safety notices and operating instructions are available
and observed,
• The respective national accident prevention regulations
are observed,
• The permissible data and operational conditions are
maintained,
• Safety guards are used and mandatory maintenance is
performed,
• Legal regulations are observed during disposal,
• compliance with national installation regulations.
3 Transport and storage
Only transport the product inside the original packaging or a
suitable alternative.
The equipment must be protected from moisture and heat
when not in use. It must be stored in a covered, dry, dust-free
room at room temperature.
4 Installation and connection
4.1 Installation
The equipment must be installed by a professional familiar
with the safety requirements and risks.
WARNING
System pressurised
De-pressurize the system prior to assembly.
4.1.1 VSA 24-SM and VSA 24-SH
The capacity sensor VSA 24-SM/-SH screws directly onto the
return filter, resp. the designated connection bore "D" (multi-
terminal). Only hand tighten the VSA 24. Be sure the O-ring is
not damaged.
4.1.2 VSA 24-DM and VSA 24-DH
The capacity sensor VSA 24-DM/-DH screws directly onto the
line filter. Tighten the VSA 24-DM/-DH to a torque of approx.
25 Nm. Be sure the copper ring is not damaged.
The top of the VSA 24-DM/-DH can be turned after loosening a
grub screw to adjust the cable outlet.
NOTICE
The top and bottom of the VSA 24-DM/-DH match. Therefore
do not use a different top. The system could otherwise be
damage.
4
Bühler Technologies GmbH
BX130002 ◦ 08/2020