Flowserve Pulsair III Digital - Manual (Page 4)

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Worcester Controls Pulsair III Digital Electronic Positioner FCD WCAIM2056-00 - 08/04
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Worcester Controls Pulsair III Digital Electronic Positioner FCD WCAIM2056-00 - 08/04
Storage Indoors
Store the positioner in its original packaging. The storage environment must be clean,
dry, and cool 60-80°F (15-26°C).
Storage Outdoors or for a Longer Period
If the positioner must be stored outdoors, it is important that all cover screws are
tightened and that all connections are properly sealed. The unit should be packed with a
desiccant (silica gel) in a plastic bag or similar, covered with plastic, and not exposed to
sunlight, rain, or snow.
This is also applicable for long-term storage (more than 1 month) and for long transport
by sea.
Storage in a Warm Place
When the positioner is stored in a warm place with a high relative humidity and is sub-
jected to daily temperature variations, the air inside the unit will expand and contract.
This means that air from outside the unit may be drawn into the positioner. Depending
on the temperature variations, relative humidity, and other factors, condensation and
corrosion can occur inside the unit, which in turn can give rise to functional disorders or
a failure.
3 Design
The PULSAIR III positioner contains:
• electronic board with microprocessor, HART modem, display etc.
• pneumatic valve block
• positional feedback with potentiometer
• sealed compartment for electrical connections.
The pushbuttons and display are accessible underneath the aluminum cover, which is
sealed with an O-ring.
The fi gure shows the PULSAIR III with the cover removed.
Filter
Display, control
pushbuttons
Terminal block
Processor and
motherboard
Potentiometer
Valve
block
Adjusting screws,
damping