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.