SMAR fy303, Operation, Maintenance & Instruction Manual

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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 measurement and control depends on several variables. Although the
converter has an outstanding performance, proper installation is essential, in order to maximize its
performance.
Among all factors, which may affect converter accuracy environmental conditions are the most
difficult to control. There are, however, ways to reduce the effects of temperature, humidity and
vibration.
The FY303 has a built-in temperature sensor to compensate for temperature variations. At the field,
this feature minimizes the temperature variation effect.
Locating 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 avoided.
Use of sunshades or heat shields to protect the positioner from external heat sources should be
considered, if necessary.
Humidity is fatal to electronic circuits. In areas subjected to high relative humidity, the O-rings for the
electronics cover must be correctly placed. 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
humidity. The electronic circuit is protected by a humidity proof coating, but frequent exposures to
humidity may affect the provided protection. 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. Code approved sealing methods on conduit entering the positioner should be
employed.
Although the positioner is virtually insensitive to vibration, installation close to pumps, turbines or
other vibrating equipment should be avoided.
Mounting
The mounting of positioner FY303 will depend on actuator type, single (spring return) action or
double action and on actuator movement, if it is linear or rotary. Two supports are required for
mounting, one for the magnet and the other for the positioner itself. Smar may supply them both
since they are specified in the order code.
Rotary Movement
Install the magnet on the valve stem using the magnet support (See Figure 1.2).
Install the positioner support on the actuator. The actuator should be in accordance with standard
VDI/VDE 5845, all you have to do is tighten the four screws with the lock washers on the standard
support.
For special supports, refer to specify instructions. After installing the support on the actuator, it is
possible to mount the positioner
FY303 on the support by means of the four screws with lock
washers.
Make sure that the arrow engraved on the magnet coincides with the arrow engraved on the
positioner when the valve is in mid travel.
If the installation of the positioner or magnet should be altered, or if there should be any other
modification, the positioner will require a recalibration.
As to the type of valve action, refer to paragraph "Pneumatic Connections".