Asco LI Inbetriebnahme Und Wartungsanleitung

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 t IIIC T85°C 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
Pn
(watt)
insulation class F (155°C) 100% E.D.
0,5 •
surface temperature classifi cation
(G/D)
temperature temperature
for dust class
temperature
(°C)
T
85 6
INSTALLATION AND MAINTENANCE INSTRUCTIONS
Solenoid operators, intrinsically safe enclosure,
(1)
maximum ambient °C
surface temperature
T6
85°C
60
temperature
(G/D)
maximum maximum maximun
ambient cold wattage
(DC) temperature
(°C) (W)
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
I min.
(ON)
Nominal dissipated power
Insulation class F (155°C) 100% E.D.
Pn
(W)
0,5
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:
I
(mA) =
(ON)
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)
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
cable
Rc ()
cable
Depending on the ambient temperature/power rating, a heat
resistant cable suitable for the temperature indicated on the
(°C)
coil must be used.
-
2
: Un = 12,5 V
: 32 mA
: Pn = 0,5 W
safety parameters
U
i I P
= (DC)
I I
(V) (mA) (W)
32 500 1,5
[ V s - 0,7] x 1000
(Rc + R l + Rb)
Minimum supply current for the product
288 (Ta + 234 +5)
=
254
GB
L C
I I
(mH)
(F)
0 0
501882-001