Flowserve 36 Series Electric Actuator - Manual (Page 7)

Flow Control
Worcester Actuation Systems
E. INSTALLATION
Install the 36 actuator per Sections I and II of this manual. Verify that
the 36 actuator limit switch is properly secured.
Valve opening time (“on” time) is powered through the circuit board’s
red wire and is connected to the limit switch’s (NC) normally-closed
contact. Valve closed time is powered through the circuit board’s
black wire and is connected to the limit switch’s (NO) normally-open
contact. (See Figures 3 and 4.)
When the actuator, with its timer, is properly installed and wired,
simply apply power to the actuator to begin operation.
After power is turned on, the valve will open for the required short
time period and then close and stay closed for required long period.
F. TROUBLESHOOTING
Proper limit switch action in the 36 actuator is very important for
proper timer operation.
If erratic operation is noted, do the following:
1. Verify that valve operates easily and is not sticking. Verify that
proper AC voltage is available at terminals 1 and 2.
2. Verify that the timer board is cycling properly by observing the
operation of the LED cycle indicators and/or the operation of the
reset switch to force the timer board into the open cycle. (Note: If
timer is already in the open part of the cycle, lower LED is lighted for
current boards or upper LED for older boards. Operation of the reset
switch will have no effect.) It is suggested that, for checking
purposes, the shortest time periods be set into each cycle to
minimize testing time. (Only switches 1 and 5 should be in the ON
position.)
3. Verify proper actuator and actuator limit switch operation.
Remove supply power from the actuator. Disconnect the supply
power at the circuit board terminal strip and remove the circuit
board’s red and black wires at the limit switch. Tape these leads’
ends and fold them back away from the limit switch contacts.
Apply power between the motor common lead and the limit
switch’s NO and then NC switch contacts. The actuator should
open and then close as power is alternately applied between the
motor common lead and these switch contacts. If problems are
noted, either the limit switch or motor is defective.
4. If in Step 2 above, the motor operates properly but actuator
does not stop at correct position, check the limit switch for
proper adjustment. Adjust the limit switch as noted in Section II,
Parts C and D. If the limit switch is defective, remove and
replace the switch.
5. If the actuator motor and switch are properly operating, then
erratic problems are caused by the auto sequence timer circuit
board. Remove circuit board and replace with a new circuit board
from Flowserve.