5-8 LY Installation and Maintenance for LY 1001, LY 2001 and LY 3001 LMAIM1501
Figure 5.7 – Limit Switch Setting Nut
4. Rotate the CLOSE Limit Cam CW through the high side to the trip point until the Switch Plunger is released.
This causes the N.O. (normally open) contact to open.
NOTE: There will be no electrical continuity at the trip point when measuring with an ohmmeter between the
common lead and the N.O. lead. You may also hear a faint “click” at the trip point.
NOTE: During actuator operation, when the Switch Plunger trips, the N.O. contact is released, causing the
Limit Switch to stop the actuator in the CLOSED position.
Figure 5.8 – Setting CLOSE Limit Cam
5. Retighten Setting Nut (piece #7-10).
CLOSE microswitch
position while valve
is traveling from OPEN
toward the CLOSED
position
High Side
Rotate CW to
reach CLOSE
Trip Point
CLOSE
Limit Cam
CLOSE microswitch
position when valve
has reached the CLOSED
position and microswitch
has tripped
High Side
CLOSE
Trip Point
position
(“click”)
CLOSE
Limit Cam
Switch
Plunger
Switch Plunger
NO
NC
COM
NO
NC
COM
PERCENT
OPEN
0
50
100
Limitorque
7-10
Standard OPEN
Microswitch location
Standard CLOSE
Microswitch location
Flow Control Division
Limitorque Actuation Systems
To Next Page
Loading...