Greenheck El-O-Matic E and P Series - Manual (Page 6)

Pneumatic Connections
Single acting
1
A
2
4.
Pneumatic Connections - Single acting
This assumes a standard installation, direct acting
with an increasing signal to open the valve in a
CCW (counterclockwise) direction.
Before connecting any air supply make sure
that the air available is clean dry instrument air
filtered to at least 25 microns - see below.
1. Connect an appropriate piece of air tubing
between the port 1. on the positioner to the “A”
port on the actuator. (The “A” port is the one
that, when air is applied to it, rotates the actua-
tor in a counter clockwise direction).
2. Connect an air supply to the positioner port
marked “Supply”.
3. The unused positioner port 2, should be
plugged using the pipe plug supplied with your
positioner.
Connect port "Exhaust" with elements, which
guarantee IP54.
4. If the positioner is required to meet enclosure
rating IP54, be sure that the "Exhaust" port is
connected with elements which prevent the
input of water and give no pressure rising inside
the housing because of throttling of exhaust flow
(no sintered filters, but a piece of tube or a
special IP65 Exhaust plug with diaphragm.
5. Connect the instrument air to the port marked
"INSTR".
Installation Rotary Actuators
Supply
Exhaust
Instrument
Note: For a reverse acting assembly, use the
same procedure but remember that a re-
verse acting actuator must be used - see
page 7.
Air Supply Requirements
CAUTION: Pressure in excess of 8.6 bar (125 psi)
will cause damage to the Positioner.
Positioner supply air must be clean, dry
and oil free.
The air should be filtered to at least 25 microns
(as defined in the Instrument Society of America
standard ISA S7.3 specifications). The filter should
be installed as close to the positioner as possible
to ensure maximum efficiency.