Samson 3374 Service manual

Mounting and Operating
Instructions
EB 8331-3 EN
Edition September 2012
Electric Actuator
Type 3374
Three-point stepping version

2 EB 8331-3 EN
Denition of the signal words used in these mounting and operating instructions
DANGER!
indicates a hazardous situation which,
if not avoided, will result in death or
serious injury.
WARNING!
indicates a hazardous situation which,
if not avoided, could result in death or
serious injury.
NOTICE
indicates a property damage mes-
sage.
Note:
Supplementary explanations, informa-
tion and tips


EB 8331-3 EN 3
Contents
1 General safety instructions.............................................................................5
2 Design and principle of operation ..................................................................6
2.1 Additional equipment.....................................................................................6
2.2 Technical data ...............................................................................................7
3 Installation..................................................................................................10
3.1 Mounting position........................................................................................10
3.2 Attachment to the valve ................................................................................10
3.2.1 Construction with integrated yoke..................................................................10
3.2.2 Construction with ring nut.............................................................................10
4 Electrical connections...................................................................................12
5 Manual override .........................................................................................14
6 Limit contacts ..............................................................................................15
6.1 Retrottingthelimitcontacts..........................................................................15
6.1.1 Retrotting(withoutresistancetransmitters).....................................................16
6.1.2 Retrotting(whenresistancetransmittersarealreadyinstalled).........................18
6.2 Adjusting the limit contacts ...........................................................................19
7 Resistance transmitters.................................................................................20
7.1 Retrottingtheresistancetransmitters.............................................................20
7.1.1 Retrotting(withoutlimitcontacts)..................................................................20
7.1.2 Retrotting(whenlimitcontactsarealreadyinstalled)......................................22
7.2 Calibrating the resistance transmitters............................................................23
8 Dimensions in mm.......................................................................................24
9 Nameplate..................................................................................................25
10 Customer inquiries ......................................................................................25
11 Appendix....................................................................................................26

General safety instructions
EB 8331-3 EN 5
1 General safety instructions
For your own safety, follow these instructions concerning the mounting, start up and opera-
tion of the actuator:
−
The device is to be assembled, started up or operated only by trained and experienced per-
sonnel familiar with the product. According to these mounting and operating instructions,
trained personnel refers to individuals who are able to judge the work they are assigned
to and recognize possible dangers due to their specialized training, their knowledge and
experience as well as their knowledge of the applicable standards.
−
Any hazards that could be caused in the valve by the process medium and the operat-
ing pressure or by moving parts are to be prevented by means of appropriate measures.
−
The actuators are designed for use in low voltage installations. For wiring and maintenance,
you are required to observe the relevant safety regulations. Only use protective equipment
in which the power supply cannot be reconnected inadvertently.
−Before wiring the actuator, disconnect it from the power supply.
To avoid damage to any equipment, the following also applies:
−Proper shipping and storage are assumed.
Note:
Actuators with a CE marking fulll the requirements of the Directives 2004/108/EC
and 2006/95/EC.
The Declaration of Conformity is available on request.


Design and principle of operation
6 EB 8331-3 EN
2 Design and principle of op-
eration
The Type 3374 Electric Actuator is used in in-
dustrial plants as well as in heating, ventila-
tion and air-conditioning systems.
Theactuatorissuitableforform-tattachment
to various SAMSON valve series, depending
on the version with or without fail-safe action.
The synchronous motor is switched off by
torque-dependent limit switches in the end po-
sitions or in case of overload. The force of the
motor is transmitted to the actuator stem via
gearing and ball screw.
Testing according to DINEN14597
TheType3374ElectricActuatorwithfail-ac-
tion "Actuator stem extends" is tested by the
GermanTechnicalInspectorate(TÜV)accord-
ingtoDINEN14597incombinationwith
various SAMSON valves. The register num-
ber is available on request.
2.1 Additional equipment
The actuator can be equipped with limit con-
tactsand/orresistancetransmitterstoinu-
ence the tasks of control equipment. Refer to
sections 6 and 7.

Design and principle of operation
EB 8331-3 EN 7
2.2 Technical data
Actuator Type 3374 -10 -11 -15 -21 -26 -31 -36
Version with Yoke Ring nut Yoke Ring nut Yoke Ring nut
Fail-safe action Without Stem extends Stem retracts
Rated travel mm 30 15 30 15
Transit time for rated travel
Standard s 240 120 240 120
Fast s 120 60 120 60
in case of fail-safe action s – 12
Stroking speed
Standard mm/s 0.125 0.125
Fast mm/s 0.25 0.25
in case of fail-safe action mm/s – 1.25
Actuating force 2.5 kN
Stem retracts or extends
2 kN
Stem extends
0.5 kN
Stem retracts
Power supply 230V,+10/–15%, 50Hz,
230V,+10/–15%, 60Hz,
24V,+10/–15%, 50Hz,
24V,+10/–15%, 60Hz,
120V(90to132V),60Hz
Power consumption VA 7.5/13 2) 10.5/16 2)
Motor switch-off Torque-dependent
Ambient temperature range 5 to 60 °C
Storage temperature –20to+70°C
Degree of protection IP54acc.toEN60529,(IP65withthreecableglands1))
Suspended mounting position not approved
Overvoltage category II according to EN 60664
Design and testing EN 61010
Class of protection II according to EN 61140
Noise immunity EN 61000-6-2, EN 61326
Noise emission EN 61000-6-3, EN 61326

Design and principle of operation
8 EB 8331-3 EN
Actuator Type 3374 -10 -11 -15 -21 -26 -31 -36
Version with Yoke Ring nut Yoke Ring nut Yoke Ring nut
Fail-safe action Without Stem extends Stem retracts
Manual override Hexwrench·Adjustmentnotpossibleafterfail-safeactionhas
been triggered
Manual override of actuators with fail-safe action only possible
whenpowersupplyisconnected(seesection5)
Weight kg(approx.) 3.2 3.3 3.9 4.0 3.5 3.6
Materials Housingandcover:Plastic(glass-berreinforcedPPO)
Additional electrical equipment
Limit contacts Two travel-dependent, adjustable changeover switches,
perm.load250VAC;3A
Resistance transmitters 2) 0to1000Ω,(0to900Ωatratedtravel)
max. permissible current 1 mA
1) CableglandsM20x1.5withmetalnut(23/24mmwidthacrossats)
2) Actuator with faster motor

Installation
10 EB 8331-3 EN
3 Installation
3.1 Mounting position
Installation depends on the mounting position
of the valve. The actuator must not be sus-
pended to hang downwards.
3.2 Attachment to the valve
3.2.1 Construction with inte-
grated yoke
Fig. 1A: Attachment to
– Series V2001 Valves (DN 15 to 80)
– Type 3260 (DN 65 to 150)
– Type 3214 (DN 65 to 100)
1.
Remove protective covers and unscrew nut
(6)fromthevalve.
2.
Retract actuator stem using the manual
override. Refer to section 5.
3.
Place actuator on yoke and fasten tight
usingnut(6,36mmwidthacrossats)
(tighteningtorquemin.150Nm).
4.
Whentheplugstem(5)tscloselyon-
totheactuatorstem(3),attachbothstem
connector clamps (4) and fasten with
screws.
3.2.2 Construction with ring
nut
Fig. 1B: Attachment to Series 240 Valves
1. Push plug stem down to close the valve.
2.
Turnthestemconnectornut(8)untilthe
measurementx=75mm(DN100and
larger:x=90mm)fromthetopofthe
yoke to the head of the stem connector
nut(8)isachieved.Lockthispositionwith
thelocknut(9).
3. Retract actuator stem using the manual
override. Refer to section 5.
4.
Place actuator onto the valve and secure
usingtheringnut(7).
5.
Whenthestemconnectornut(8)restson
the actuator stem, attach both stem con-
nectorclamps(4)andfastenwithscrews.
6.
Moveactuatorstem(3)totheendposi-
tion(valveclosed)usingthemanualover-
ride or motor.
7. Align travel indicator scale (10) to the
middle of the stem connector (4) and
screw tight.
Fig. 1C:
Attachment to Type 3214 (DN 125 to 250)
1. Retract actuator stem using the manual
override. Refer to section 5.
2. Place actuator onto the valve and secure
usingtheringnut(7).Ifnecessary,retract
the actuator stem slightly beforehand using
the manual override.
3. Whentheplugstemtscloselyontothe
actuatorstem(3),attachbothstemcon-
nectorclamps(4)andfastenwithscrews.
4.
Moveactuatorstem(3)totheendposi-
tion(valveclosed)usingthemanualover-
ride or motor.
5.
Align travel indicator scale (10) to the
middle of the stem connector (4) and
screw tight.

Installation
EB 8331-3 EN 11
Types 3374-10/-11/-21/-31
Connection with yoke
AttachmenttoSeriesV2001Valves,
Type3260(DN65to150),
Type3214(DN65to100)
Types 3374-15/-26/-36
Connection with ring nut
AttachmenttoSeries240Valves
1
2.1
3
4
5
6
A
x
1
2.3
7
3
4
8
910
5
B
Types 3374-15/-26/-36
Connection with ring nut
AttachmenttoType3214Valve(DN125to250) 1 Actuator
2.1 Actuator yoke
2.2 Valveyoke
2.3 Bonnet
3 Actuator stem
4 Stem connector
5 Plug stem
6 Nut
7 Ring nut
8 Stem connector nut
9 Lock nut
10 Travel indicator scale
1
2.2
7
3
10
4
5
C
Fig. 1: Attachment to the valve

Electrical connections
12 EB 8331-3 EN
4 Electrical connections
DANGER!
− Upon installation of the electric ca-
bles, you are required to observe
the regulations concerning low-
voltage installations according to
DINVDE0100 as well as the regu-
lations of your local power supplier.
−
Only connect the actuator to the
mains power network when the pow-
er is switched off.
Establish electrical connections as illustrated in
the circuit diagram on the next page. A max-
imum of three cable glands can be attached
to the housing for cable entry.

Electrical connections
EB 8331-3 EN 13
aL eL N NL
N+–LN
eL
aL
Ce Ce
L
41 44 42 51 54 52 81 82 83 91 92 93
ea ae
Retracts
Extends
aL eL N NL
N+
–L
N
eL
aL
Ce Ce
L
41 44 42 51 54 52 81 82 83 91 92 93
ea ae
Magnet in version with
fail-safe action
aL eL N NL
N+–LN
eL
aL
Ce Ce
L
41 44 42 51 54 52 81 82 83 91 92 93
ea ae
Resistancetransmitters(optional)
Limitcontacts(optional)
Fig. 2: Terminal connections

Manual override
14 EB 8331-3 EN
5 Manual override
Tooperatethemanualoverride,placea4mm
hex wrench on the red actuator shaft located
at the side of the housing. The hex wrench is
included in the scope of delivery. It is attached
to the bottom of the housing.
Version with fail-safe action
Manual override is only possible in actuators
with fail-safe action when the power supply
(terminalsLandN)isconnected.

Limit contacts
EB 8331-3 EN 15
6 Limit contacts
6.1 Retrotting the limit con-
tacts
To install the limit contacts, the following retro-
tkitsarerequired:
−Basic unit Order no. 1400-8829
−Retrotkit Orderno.1400-8830
When ordering, state the conguration ID
(Var.-ID)andthetypedesignationoftheac-
tuator.Bothspecicationsarewrittenonthe
nameplate. Refer to section 9 on page 25.
DANGER!
When installing electrical equip-
ment, make sure the power supply is
switched off and the signal input is
disconnected rst.
NOTICE
We recommend to apply a small
amount of lubricant (e.g. Vaseline) to
the spindles on the gear faces and to
the sides of the cogs.
Note:
To undo the screws on the housing
cover, use a Pozidriv PZ2 screwdriver
to provide enough hold on the screw
heads.
Retrot kits:
4 3 6 10
1 2
4 3 6 10
1 2
1 Intermediate gear
2 Spindle gear
3 Serratedring(for1)
4 Tension spring
6 Serratedring(for10)
10 Shim
Fig. 3: Accessories order no. 1400-8829
9 3 16 8
20
17
1918
3 Serrated ring
8 Spacer
9 Retaining ring
16 Screw WN 1412
17 Terminal board
18 Adjustment gear
19 Contact cam
20 Cam holder
Fig. 4: Accessories order no. 1400-8830


Limit contacts
16 EB 8331-3 EN
6.1.1 Retrotting (without re-
sistance transmitters)
1. Unscrew screws on housing cover and
take the cover off the actuator.
2.
Move the actuator stem to the end position
depending on the fail-safe action "Actu-
ator stem extends" or "Actuator stem re-
tracts”.Refertosection5.
3.
Unscrew fastening screws. Push the ac-
tuatorboard(12)fromitsguidingtothe
right. Slightly lift the board and continue
pushing it further towards the cable entry.
4. Clipthespindlegear(2)ontothesleeve
(13).Makesurethesidelatchisproperly
engaged in the groove of the sleeve.
5. Pushtheintermediategear(1)ontothe
spindle1(11.1),mounttheserratedring
(10)andpushitdownasfarasitwillgo
6.
Push the spacer (8) onto the spindle
(11.2).
7.
Placethetensionspring(4)ontothecor-
responding spindle, ensuring that the
long wire of the tension spring rests on
thespacer(8)and on theintermediate
gear(1).
8.
Place both ready-assembled contact cams
(19)withthecogrstontothecamhold-
er(20).
9.
Push adjustment gears (18) onto their
spindles and fasten with one screw each.
Check whether the adjustment gears can
be turned easily. If not, slightly loosen its
screw again.
10.
Turnbothcontactcams(19)asillustrat-
ed in Fig. 5 corresponding with the posi-
tion of the actuator stem on the cam hold-
er(20).
11. Push the cam holder with both contact
cams onto the spindle 2 (11.2) corre-
sponding with the position of the actua-
tor stem as illustrated in Fig. 5. Make sure
that the outermost cog of the cam support
(20)engagesinthegearwheelofthein-
termediategear(1).Inaddition,thead-
justmentgears(18)mustengageproper-
ly in the corresponding gears of the con-
tactcams(19).
12.
Securethecamholder(20)andinterme-
diategear(1)withtheserratedring(3);
push down the serrated ring as far as it
will go.
13.
Position the terminal board (17) at the
baseofthesupportata45°angle(ap-
prox.)withtheswitchespointingtowards
the gears. Swivel the upper end of the ter-
minal board towards the gears until the
board is in a vertical position and prop-
erly engaged in the support.
14.
Pushtheactuatorboard(12)backinto
its guiding. Make sure that the gears are
properly engaged. Fasten the board us-
ing screws.
15.
Adjust limit contacts as described in sec-
tion 6.2.
16.
Replacecover.Brieyturnthefastening
screws counterclockwise with a screw-
driver to center them. Then fasten down
the cover by tightening the screws.

Limit contacts
EB 8331-3 EN 17
1 23
4
8
12
13
17 20
11.1
19
11.2
18
1 Intermediate gear
2 Spindle gear
3 Serrated ring
4 Tension spring
8 Spacer
11.1 Spindle 1
11.2 Spindle 2
12 Actuator board
13 Bearing bushing
17 Terminal board
18 Adjustment gear
19 Contact cam
20 Cam holder
Fig. 5: Retrotting the limit contacts

Limit contacts
18 EB 8331-3 EN
6.1.2 Retrotting (when resis-
tance transmitters are
already installed)
1. Unscrew screws on housing cover and
take the cover off the actuator.
2. Move the actuator stem to the end position
depending on the fail-safe action "Actu-
ator stem extends" or "Actuator stem re-
tracts”.Refertosection5.
3.
Removeserratedring(6)andshim(10)
fromspindle2(11.2).
4.
Continue as described in item 8 on
page16.
11.2
12
10
6
6 Serrated ring
11.2 Spindle 2
10 Shim
12 Actuator board
Fig. 6: Retrotting limit contacts (when resistance transmitters are already installed)

Limit contacts
EB 8331-3 EN 19
6.2 Adjusting the limit contacts
1. Unscrew screws on housing cover and
take the cover off the actuator.
2. Connect power supply.
3.
Use the motor or manual override to move
the actuator stem to the point at which the
contact should react.
4. Usethe4mmhexwrenchtoturnspin-
dleoftheadjustmentgears(18)forthe
upper limit contact or for the lower lim-
it contact until the associated contact cam
onthecamholder(20)triggerstheswitch
contact of the upper or lower microswitch
ontheterminalboard(17).
5.
Replacecover.Brieyturnthefastening
screws counterclockwise with a screw-
driver to center them. Then fasten down
the cover by tightening the screws.

Resistance transmitters
20 EB 8331-3 EN
7 Resistance transmitters
7.1 Retrotting the resistance
transmitters
An actuator board with corresponding resis-
tance transmitters and gear wheels is required
forresistancetransmitterretrot.Whichactu-
ator board is to be used depends on the ac-
tuator type designation as well as the power
supplyandtransittimespecications(seeAp-
pendix,Table1onpage26).
If the actuators does not have limit con-
tacts,anadditionalretrotkit(seeFig.3on
page15)isrequired.
7.1.1 Retrotting (without lim-
it contacts)
1. Unscrew fastening screws. Push the ac-
tuatorboard(12)fromitsguidingtothe
right. Remove the actuator board and re-
place it with a board carrying resistance
transmitters.
2.
Clipthespindlegear(2)ontothesleeve
(13).Makesurethelatchisproperlyen-
gaged in the groove of the sleeve. Place
theintermediategear(1)onthespindle
1(11.1).Mounttheserratedring(3)and
push it down as far as it will go.
3. Placethetensionspring(4)ontothespin-
dle3(11.3),ensuringthatthelongwire
of the tension spring rests on the interme-
diategear(1)andthattheshortwireof
the spring is located between spindle 3
(11.3)andspindle4(11.4).Mountthe
shim(10)onspindle2(11.2).Mountthe
serratedring(6)andpushitdownasfar
as it will go.
4.
Theresistancetransmittergears(22and
23)ttedwithserratedringsmustbeput
onto their shafts to correspond with the
rated travel of the valve. The rated travel
inscription'A'for30mmratedtravelor
'B'for15mmratedtravelmustbelegible
(seealsoFig.9onpage23).
5. Pushtheactuatorboard(12)backinto
its guiding. Make sure that the gears are
properly engaged. Fasten the board us-
ing screws.