Emerson ELQ 100 - Stroke Adjustment; Setting of Switches and Mechanical Limit Stops

TM
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Installation Operation & Maintenance manual ELQ
DOC.55.EDN Rev: E
October 2012
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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.