Section 1
1.1
INSTALLATION
General
NOTE
The installation carried out in hazardous areas should follow the recommendations of the IEC60079-14 standard.
The overall accuracy of measuring and control depends on several factors. In spite of the excellent
performance, the positioner must be adequately installed so that it may work well.
Among all factors that may affect the positioner accuracy, environmental conditions are the most
difficult to control. But there are ways to reduce the effects of temperature, humidity and vibration.
Installing the positioner in areas protected from extreme environmental changes can minimize
temperature fluctuation effects. In warm environments, the positioner should be installed to avoid, as
much as possible, direct exposure to the sun. Installation close to lines and vessels subjected to
high temperatures should also be av oided. If not possible to avoid it, consider using the remote
position sensor version.
Use thermal isolation to protect the positioner from external heart sources, if necessary.
Humidity is fatal to electronic circuits. In areas subjected to high relative humidity, the O-rings for the
electronic housing covers must be correctly placed and the covers must be completely closed by
tighten them by hand until you feel the O-rings being compressed. Do not use tools to tight the
covers. Removal of the electronics cover in the field should be reduced to the minimum necessary,
since each time it is removed; the circuits are exposed to the humidity.
The electronic circuit is protected by a humidity proof coating, but frequent exposures to humidity
may affect the protection provided. It is also important to keep the covers tightened in place. Every
time they are removed, the threads are exposed to corrosion, since painting cannot protect these
parts. Sealing methods should be employed on conduit entering of the positioner.
IMPORTANT
Avoid to use thread sealant tapes
on the air input and outputs connections, since small pieces of this type of
sealant may block the air flow inside the positioner, affecting the overall equipment performance.
Although the positioner is practically vibration resistant, it is not recommended to install it near
pumps, turbines or other equipment producing too much vibration. If not possible to avoid it,
consider using of remote position sensor version.
Mounting
The FY301 mounting depends on the type of actuator, its actions, single (with spring return) or
double, and the movement characteristic (linear or rotary). It requires two mounting brackets: one for
the magnet and another for the positioner. Smar supplies both according to the specified ordering
code (see Page 6.4 for mounting bracket ordering code)
Additionally, a great variety of customized mounting brackets is available, covering several control
valves models from different manufacturers.
Check the availability and select the most adequate mounting bracket to your need, by visiting our
web page on the Internet: http://www.smar.com. Select "Valve Positioner" option to access the
product specific page. After enter your login and password, click on the
Bracket for FY
link and
choose the most appropriate mounting bracket to your application.
See below an example showing the Positioner with rotary and linear magnets.
IMPORTANT
Smar web site (www.smar.com) has options of mounting brackets available for several actuators of several
manufacturers and models and the related dimensional drawings.
Summary of Contents for FY301
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