TM
9
Installation Operation & Maintenance manual ELQ
DOC.55.EDN Rev: E
October 2012
2
1
2
1
4
StrOKE ADjUStMENt
The ELQ-series actuators have two ways of limiting
the stroke:
• Electrically limiting the stroke by motor limit switch
setting.
• Mechanically limiting the stroke by limit stop
screws (when the actuator is under manual op
-
eration).
1
=
open
2
=
closed
4.0.1 Electrically limiting the stroke by motor limit switch setting.
4.0.2 Mechanically limiting the stroke by limit stop screws
4.1
Setting of switches and mechanical
limit stops
4.1.1 Factory settings
The nominal rotation of the ELQ-actuator is factory
set. If desired adjust the motor and limit switches and
the mechanical limit stops after installing the ELQ-
actuator on the valve.
(For connecting limit switch signals for position indi
-
cation, see § 5.2)
table 4.1
Factory settings
Nominal rotation
90°
Motor and limit switches + 1°
at each end
Mechanical limit stops
+ 5°
at each end
Important
During operation the sequence of reach
-
ing the various switches/stops at the end of
stroke should be;
1e Limit switches
2e Motor switches
3e Limit stops
4.1.2 Procedure
1. Mount the actuator onto a valve.
"Open" position:
2. Move the valve away from the fully open position
with the manual override hand wheel.
3. Turn the “open” mechanical stop screw out
(CCW) 4 turns.
4. Move the valve to the fully open position with the
manual override hand wheel.
5. Turn “motor switch open”-cam (CW) until switch
trips.
For position indication set the limit switches as fol
-
lows:
Turn “Limit switch open”-cam (CW) until switch trips.
6. Turn the “open” mechanical stop screw in (CW)
until an obstruction is felt (do not force) then
back-off 3 turns and lock the mechanical stop
screw with the locknut.
