Flowserve 10 ACCESS I 39 Actuator with AS Interface - Manual (Page 5)

WCAIM2041 10, 15, 20 Access I 39 Acutators with AS Interface 5
position. The green LED will shut off and the yellow and
orange LEDs should be lit indicating power to the coil,
and coil continuity, respectively.
Adjust the closed position switch/sensor SW-1 in the
same manner as the open position switch/sensor until the
red LED turns on. Then tighten the adjustment screw one
additional turn.
When the solenoid is de-energized, the actuator will
return to its full open position. The yellow and red LEDs
will turn off indicating that the solenoid is de-energized
and that the actuator is no longer in the full closed
position and then green LED will turn on indicating that
the actuator is now in the full open position.
4. Wiring instructions for solenoid and/or limit switches
(proximity sensors).
Make electrical connections in accordance with the appropriate
wiring diagram on inside of cover or figure 2 below.
5. Place the lubricated O-Ring down over the threaded section of
the housing onto the machined shoulder. The cover must be
threaded onto housing tightly for proper performance. The
assembly is now complete.
NOTE: For units with a metal cover, a light coat of grease
(such as a #1 grease) shall be applied to the cover threads.
A minimum of
1 /
3
the circumference of the threads to be
lubricated.
OPERATION
A. Double-Acting with Control Block – Air is supplied to the 1 /
4
" NPT
port on the block. When the solenoid is energized, the spring-
loaded plunger is withdrawn, allowing the supply air to shift the
spring-loaded spool within the block, which opens the supply
path to the center chamber of the actuator. Air from the end
chambers of the actuator is allowed to pass through the block
and exhaust to atmosphere.
When the solenoid is de-energized, the spring-loaded plunger
blocks the flow of air to the spool seal within the block and the
spool spring shifts the spool within the block to a position which
opens the supply path to the end chambers of the actuator. Air
from the center chamber of the actuator is allowed to pass
through the block and exhaust to atmosphere.
The actuator is electrically fail-safe. That is, it will return to its de-
energized position upon electrical failure.
The unit has two independently-adjustable speed control screws
which can be used to adjust the speed of operation for the
opening and/or closing stroke (see figure 3 on page 6). If the
speed control screws are too tight, the unit will fail to operate.
NOTE: Speed control screws are shipped from the factory in the
full-open position.
B. Spring-Return with Control Block – Air is supplied to the 1 /
4
" NPT
port on the block. When the solenoid is energized, the spring-
loaded plunger is withdrawn, allowing the supply air to shift the
spring-loaded spool within the block, which opens the supply
path to the center chamber of the actuator. Air from the end
chambers of the actuator is allowed to pass through the block
and exhaust to atmosphere.
When the solenoid is de-energized, the spring-loaded plunger
blocks the flow of air to the spool within the block and the spring-
loaded spool returns to a position which allows air from the
center chamber of the actuator to pass through the block and
exhaust to atmosphere as the actuator is cycled by the springs in
the end chambers of the actuator. The end chambers are
exhausted to atmosphere at all times.
The actuator is fail-safe. That is, it will return to its de-energized
position upon electrical or pneumatic failure.
The unit has one speed control screw, which can be used to
adjust the speed of operation for the closing stroke (on a fail-
closed unit) or opening stroke on a fail-open unit, and one port
plugged with a red plastic plug (see figure 3 on page 6). If the
speed control screw is too tight, the unit will fail to operate.
NOTE: Speed control screws are shipped from factory in the full-
open position.
CAUTIONS: If converting a double-acting actuator to a spring-
return actuator or vice-versa, be sure the correct control block
gasket is used. Also, be sure that all gaskets are properly
installed (see figure 3 on page 6 and actuator exploded view).
Do not apply any grease to gasket, it must be installed dry.
Be sure red plastic plug is installed in plugged port (see figure
3 on page 6) for spring-return actuators.
Flow Control
Worcester Controls
Figure 2
Fail-Closed
(In-line Operation)
Fail-Closed
(Cross-line, Inverted Operation)
Fail-Open
(In-Line, Inverted Operation)
Fail-Open
(Cross-line Operation,
or with In-line Coupling)
Note: Wire colors in parenthesis are for proximity sensors only. For units without switches/sensors, disregard
switch/sensor wiring, and also their instructions in section C.3.
Red = Closed
Green = Open
Yellow = Solenoid Energized
Orange = Coil Continuity
LEDs
{