Flowserve L120-190 through L120-2000 - Manual (Page 22)

Limitorque ® L120-190 through L120-2000 FCD LMENIM1203-00 – 10/11
22
6. Check output rotation:
• If phase rotation is correct, the valve should begin to open.
• If valve begins to CLOSE, STOP IMMEDIATELY. Incorrect phase rotation will lead to serious
damage if the valve seats.
NOTE: For UEC only – if incorrect rotation, select opposite direction with dipswitch.
7. Correct the phase rotation one of two ways:
• switch any two of the three power leads for three-phase power, or
• reverse the armature leads for DC power.
The actuator should operate correctly and will be stopped at the end-of-travel positions by torque or
limit switch functions.
Premature stopping may be caused by incorrect limit switch or torque switch settings or obstructions in
the valve.
6.1.1 Typical Wiring Diagram
Figures 9.1 through 9.4 are representations of typical applications and may not be applicable to
your specific actuator. Please refer to the wiring diagram supplied with your actuator to confirm the
actual equipment supplied. Check www.limitorque.com for the latest diagram revisions and/or related
diagrams.
6.2 Manual Operation
Piece numbers refer to Figures 8.1, 8.2, and 8.3 for L120-190 and -420, Figures 8.4, 8.5, and 8.6 for
L120-800, and Figures 8.7 - 8.10 for L120-2000.
The actuator has a handwheel for manual operation. The actuator may be manually operated any time
the motor is not engaged.
Manually operate as follows:
1. Move the Declutch Lever (piece #10, #11) in the direction of the arrow until it latches into place. Do
not force the lever.
2. If the lever will not latch, rotate the Handwheel (piece #5) while turning the declutch lever and the
lever will latch in place.
When the declutch lever is turned, it rotates a Cam which causes the Clutch Fork (piece #42-1) to move
the Worm Shaft Clutch (piece #33) axially along the worm shaft against the force of a Clutch Spring
(piece #45, #46). This disengages the mating lugs on the Worm Shaft Gear (piece #32) and the clutch,
and engages the clutch with the Handwheel Gear (piece #17, #9). The Clutch Trippers (piece # 34-A
and 34-B) maintain this position and latch onto the worm shaft gear. Turning the Handwheel (piece #5)
rotates the Handwheel Shaft (piece #18) and the Handwheel Pinion. The handwheel pinion then drives
the Handwheel Gear (piece #8, #9) which in turn drives the clutch. The clutch then drives the actuator in
the same manner as in motor operation.
When the motor is energized, the motor pinion will turn the worm shaft gear. Tripper cams mounted
on the worm shaft gear cause the trippers to release the clutch. The Clutch Fork (piece #42-1) is then
forced, under spring pressure, to return the clutch to the motor operation position.
NOTE: The shift from manual operation to motor operation is automatic and does not require external
positioning of the declutch shaft.