Flowserve LY Series Limitorque - Manual (Page 19)

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Limitorque LY Series: LY 1001, LY 2001 and LY 3001 FCD LMENIM1501-00 – 11/11
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4. Remove the MDPI Plate and flip over for indication of CCW rotation to the valve’s closed position.
(See Figure 5.12 for MDPI Dial Plate.)
5.7 Limit Switch and Mechanical Stop Settings
The Limit Switch and Mechanical Stops are not preset at the factory, but must be set after mounting
on the associated equipment. If the actuator has been shipped already installed on a valve, the actuator
should have the Limit Switch and Mechanical Stops set for your application. If the actuator is not
already installed on a valve or needs resetting, use the following instructions to make the appropriate
settings.
The following instructions for setting the Limit Switches and Mechanical Stops are based on the typical
orientation for most actuator applications. Consult the applicable wiring diagram located in the Control
Compartment for the specific Limit Switch development.
NOTE: While making Limit Switch settings, remember that the Limit Cams rotate in the same direction
as the valve stem.
5.8 Setting the Limit Switches
c WARNING: Do not manually operate actuator with devices other than installed Handwheel and
Declutch Lever. Using additive force devices (cheater bars, wheel wrenches, pipe wrenches or
other devices of this nature) on the actuator Handwheel or Declutch Lever may cause serious
personal injury and/or damage to the actuator or valve.
c WARNING: HAZARDOUS VOLTAGE. Make sure all power is disconnected before making the
following settings.
5.8.1 Setting the CLOSED Limit Switch
1. Put the actuator in MANUAL operation: move the Declutch Lever in the direction of the arrow on the
lever until the Declutch Lever locks in place. If Declutch Lever is difficult to move, see Section 6.4,
Manual Operation for instructions to release the Declutch Lever.
2. Turn the Handwheel CW to move the valve to the full CLOSE position.
NOTE: Most applications require turning the Handwheel CW to obtain the full CLOSE position and
CCW to obtain full OPEN position. The Drive Sleeves and Limit Cams also rotate in CW rotation to
the CLOSE position and CCW to the OPEN position. If the application is configured differently, the
descriptions in this manual will describe rotation directions opposite your application.
3. Loosen Setting Nut (piece #7-10) located at the top of the switch bracket approximately 3/4 turn.
NOTE: When setting the Limit Cams by rotating to the trip point as described in Step 4, be careful
not to move more than one cam at a time. Limit Cams that have already been set are not secure
until Setting Nut (piece #7-10) is retightened.