Asco LI Instrucciones De Puesta En Marcha Y Mantenimiento

INSTALLATION AND MAINTENANCE INSTRUCTIONS
Solenoid operators, intrinsically safe enclosure,
GENERAL
These Installation and Maintenance Instructions for solenoid
operator types LI (aluminium enclosure) - WSLI (stainless
steel AISI 316L enclosure) are a general supplement to the
specifi c I&M sheet for the solenoid valve. These operators
are identifi ed by the prefi xes LI / WSLI before the catalogue
number. Always use both I&M sheets for installing and main-
taining the solenoid valve.
DESCRIPTION
Essential Health and Safety Requirements: Solenoid
operators types LI / WSLI are designed in accordance with
IEC and EN Standards references: 60079-0, 60079-11 and
60079-31.
LI (1) / WSLI (2) :
q II 1G Ex ia IIC T6 Ga
Classifi cation:
q II 2D Ex tb IIIC T85°C IP66/IP67 Db
(1) (2)
and : See special conditions for safe use.
All the certifi cates of Conformity in compliance with
these Standards are available at www.asconumatics.eu
EC type examination certifi cate no.: LCIE 09 ATEX 3054 X
IECEx Certifi cate of Conformity no.: IECEx LCI 09.0022X
INSTALLATION
Our components are intended to be used only within the
technical characteristics specifi ed on the nameplate. Sole-
noid operators Types LI / WSLI are designed to be installed
in potentially explosive atmospheres caused by gases of
groups IIA, IIB and IIC, vapours or mists of category 1G (LI
/ WSLI) and dusts (category 2D). The surface temperature
classifi cation is T6-T85°C and depends on the power rating
and ambient temperature stated on the coil.
Special conditions for safe use:
- The apparatus may only be connected to certifi ed intrinsically
safe equipment. This combination must be compatible as
regards the intrinsic safety rules (see electrical parameters
under «Electrical Characteristics»).
- (1) Equipment type LI must be protected against
mechanical shock and friction when used in zone 0.
(2)
- If the WSLI apparatus is used with an aluminium
solenoid operator then the enclosure has to be
protected from any mechanical or friction impacts
when it is used in zone 0.
- Ambient operating temperature: - 40°C to + 60°C
TEMPERATURE CLASSIFICATION
DC (=) Solenoids
solenoid size maximum ambient °C (1)
Pn
surface temperature
T6
(watt)
85°C
insulation class F (155°C) 100% E.D.
0,5 • 60
cable
surface temperature classifi cation
temperature
(G/D) (G/D)
maximum maximum maximun
temperature temperature
ambient cold wattage cable
for dust class
temperature (DC) temperature
(°C) (°C) (W)
T
85 6 60 1,5
types LI / WSLI
Check the wattage compatibility with the selected product.
1) Minimum ambient temperature: -40°C. This tempera-
ture may be limited by the operating temperature rating
of the pilot valve or spool valve.
-35°C with plastic cable gland (standard delivery)
-40°C with metal cable gland
ELECTRICAL CHARACTERISTICS
DC coils (=)
type (series) LI - WSLI
Nominal supply voltage : Un = 12,5 V
I min. : 32 mA
(ON)
Nominal dissipated power : Pn = 0,5 W
Insulation class F (155°C) 100% E.D.
safety parameters
Pn U
i I P
= (DC)
I I
(V) (mA) (W)
(W)
0,5 32 500 1,5
The solenoid operators type LI or WSLI must be supplied with
power from a voltage barrier certifi ed for use in potentially
explosive atmospheres of groups IIC, IIB or IIA and having
an output circuit that is rated intrinsically safe. The valve-and-
barrier combination must be compatible in terms of intrinsic
safety.
Since the two parameters Ci and Li of the equipment are both
equal to zero, the maximum output characteristics Co and
Lo of the voltage barrier must exceed the effective values of
C and L of the connecting cable used.
Selecting the barrier and making the interconnections are at
the user's responsibility.
Calculation of operating conditions:
[ V s - 0,7] x 1000
I
(mA) =
(ON)
(Rc + R l + Rb)
This value (I (ON) ) as well as the maximum current of the
barrier/interface (if it is non-linear) must exceed 32 mA.
I (ON) (mA)
Minimum supply current for the product
Rb() Max. barrier resistance
Ta (°C) Max. ambient temperature
R l () Max. resistance of connecting cables
Vs (V) Min. no-load voltage of barrier/interface
Rc () Max. coil resistance
288 (Ta + 234 +5)
Rc ()
=
254
Depending on the ambient temperature/power rating, a heat
resistant cable suitable for the temperature indicated on the
(°C)
coil must be used.
-
2
GB
COMPATIBLE BARRIERS AND INTERFACES
These pilot valves are compatible with the barriers given in
the table. These barriers and interfaces allow to feed the
intrinsically safe solenoid valves located in explosive areas.
This equipment must be ordered from its respective manu-
facturers specifying that they are intended to feed intrinsically
safe solenoid valves intrinsically safe: LI / WSLI
According to the zones and following the country legislation,
apply the certifi cation procedure relative to the association
of IS products.
We decline all responsibility for the use of products from
other suppliers and the possible modifi cations of their char-
acteristics.
ELECTRICAL INSTALLATION
L C
Wiring must comply with local and national regulations
I I
concerning equipment for use in explosive atmospheres.
(mH) (F)
To prevent overloading and causing an ignition source, a
0 0
fuse or circuit breaker of maximum 100 mA must be used.
NOTE: Alternating current (AC) and direct current (DC) so-
lenoids are built differently. To convert from one to the other,
it is necessary to change the complete solenoid including
the core and solenoid base sub-assembly, not just the coil.
Contact ASCO.
Standard cable gland accepts cables
with overall O.D. from 6 to 12 mm. IP66/IP67: Tighten
the cable gland at a torque of min. 8 Nm (torque C).
Min. temperature -35°C.
Caution (metal cable gland): In order to obtain
IP66/IP67, it is necessary to put graphite grease on the
1/2" NPT threads according to Standard IEC-EN 60079-14
(torque E = 7 N.m).
Min. temperature -40°C.
Position the solenoid operator before making the electrical
connection. To make the wiring connections to the coil ter-
minals, remove the cover from the solenoid operator. Re-
move the outer insulation from the cable by approx. 30 mm
and strip 8 mm off the wires. Introduce the wires into the
cable-gland and connect them to the coil terminals. Con-
nect the cable ground wire to the ground terminal. Leave
enough slack in the wires between the cable entry and the
coil to avoid excessive strain on the wires. Assemble the
cable gland and tighten the elastomer compression seal so
that it fi ts tightly around the cable.
Close the housing and tighten the 4 cover screws to
the specifi ed torque. The solenoid operator's housing is
equipped with an external terminal for an earth wire.
The power supply must be within the range specifi ed on the
nameplate. Failure to stay within the electrical range of the
coil rating will result in damage to or premature failure of the
coil. This will also invalidate its approval.
503019-001
INSTALLATION AND MAINTENANCE INSTRUCTIONS
Solenoid operators, intrinsically safe enclosure,
types LI / WSLI
WARNING: Unauthorised personnel is not permitted to re-
move the cover from the solenoid operator.
Take care not to damage the mating and sealing surfaces
when disassembling or reassembling the cover of the sole-
noid operator.
Wrong assembly will invalidate the approval.
To prevent the risk of personal injury or property damage,
do not touch the solenoid operator. It can become hot under
normal operation conditions. If the solenoid valve is easily
accessible, the installer must provide protection against ac-
cidental contact.
For servicing, refer to the solenoid valve's Installation and
Maintenance Instructions.
Spare parts kits are available (contact us). If problems arise
during installation or maintenance or in case of doubt, please
contact us or one of our authorised representatives.
CAUTION: Prior to any maintenance work, power off and
depressurise the valve and vent fl uid to a safe area.
DISASSEMBLY AND RE-ASSEMBLY OF SOLENOID
OPERATOR ON VALVE:
This operation must be carried out by suitably qualifi ed per-
sonnel.
Unscrew the 4 screws and remove the cover.
Disconnect the electrical wires, remove the coil and its yoke.
Proceed in reverse order to re-install.
The solenoid operator must be fully reassembled as the hous-
ing and internal parts close the magnetic circuit.
Replacement of screw no. 1: Only use screws with 700 N/mm
minimum tensile strength.
In case of replacement of parts by the user, the trace-
ability of the fi nal product cannot be guaranteed by us
and must be ensured by the user.
Wrong assembly will invalidate the approval.
CAUTION
3
GB
SERVICE
MAINTENANCE
2
503019-001