Emerson ASCO 885 Serie Instrucciones De Instalación Y Mantenimiento

INSTALLATION AND MAINTENANCE INSTRUCTIONS
Signalling box on series 298-398
valves with dia. 80, 100, 150 & 200 mm operators
DESCRIPTION AND OPERATION
All 2/2 (Series 298, NC/NO) and 3/2 (Series 398, U) valves
can be equipped with a signalling unit enabling electrical
monitoring of the 2 valve stem positions.
This unit, consisting of a plastic body and top, is available with
mechanical contacts, inductive contacts or "intrins ically safe
inductive contacts to ATEX". It is mounted on a stainless steel
mounting depending on the versions.
The unit contains two mechanical or inductive contacts on a
printed circuit board actuated by a steel stem.
In both valve stem positions (open or closed), the end of the
stem moves the contacts, thus supplying an electrical end-
of-travel signal.
Unit supplied installed on valve and pre-adjusted:
• Orient the packing gland in the desired position (the unit
can be turned 360°), then secure the unit by tightening the
clamping screw. (fi g. I)
• Manually unscrew the sight dome (fi g. J); for connection,
see fi gs. K, L, L1 and M.
SPECIAL CONDITIONS FOR SAFE USE
The valve+signalling unit must be kept in its original packag-
ing as long as it is left unused. Do not remove the protective
covers from the ports. Storage conditions: protected from
exposure to weather; storage temperature: -40 C to +70°C ;
relative humidity: 95 %
After storage at low temperature, the valves must gradually
be brought to room temperature prior to pressurisation.
The signalling units are intended to be operated within the
technical characteristics specifi ed on the nameplate. Modi-
fi cations to the products may only be made after consulting
the manufacturer or his representative. Installation and
maintenance of the valve must be carried out by qualifi ed
personnel only.
• Versions wit intrinsically safe inductive contacts to ATEX for
use in explosive atmospheres caused by gases, vapours, mists
or dusts according to ATEX directive (See "Specifi cations" for
types of protection of contacts).
Caution: The zone classifi cation (ATEX 1999/92/EC) is
mainly defi ned by the indications on the label on the
valve's body.
Compliance with the Essential Health and Safety Require-
ments has been assured by compliance with the European
Standards EN 60079-0, EN 60079-11 and EN 60076-26.
q II 2 GD c IIB T6 T85°C
Safety code
(c) (c) (c)
x°C (Tx) Ts amb T fl uid
(T6)
85°C 80°C 80°C
(c) x°C = Surface temperature
(Tx) = Temperature class
Ts amb = Ambient temperature
T fl uid = Fluid temperature
For valves to ATEX, the instructions for use given in
the specifi c Installation Instructions provided with the
product must be strictly followed.
!
ATEX versions: Make sure that all metal or conductive
parts are always interconnected and connected to earth. The
contacts are connected to ground with the ground terminal
(no. 1).The signalling units may be mounted in any position.
MAINTENANCE
!
Before any maintenance or revision is carried out,
disconnect the pilot from its control system, and depres-
surize drain the valve.
For work on the valve itself, refer to the corresponding
installation and maintenance instructions.
Preventive maintenance
Visually inspect the unit once a month.
Check: that there are no foreign objects inside the unit,
that there is no moisture inside the unit, that the unit is cor-
rectly secured against rotation.
NOTE: the signalling unit complies with IP66 when all the
seals are correctly in place.
Malfunctioning
In the event of failure to detect the open or closed position:
- if, during an operating cycle, the stem does not move or
moves abnormally:
Check: the pressures (valve and pilot), the operation of
the valve and the control system.
- if the stem is correctly activated:
Check: the electrical supply to the contacts, the adjust-
ment of the contacts' opening and closing points, the
state of the contacts, the state of the printed circuit
board.
CONNECTION AND ADJUSTMENT:
The electrical connection must be carried out by qualifi ed staff
in accordance with local standards and regulations.
• Orient the packing gland in the desired position (the unit
can be turned 360°), then secure the unit by tightening the
clamping screw. (fi g. I)
• Manually unscrew the sight dome (fi g. J); for connection,
see fi gs. K, L, L1 and M.
(c)
2
GB
Mechanical contacts
Specifi cations (fi g. K)
Breaking capacity at 250 V AC:
resistive circuit: 3.2 A,
inductive circuit: 1.8 A (cosØ = 0.8).
Terminal strip (grip: 2.5 mm
terminals 1, 2 and 3: valve open contact,
terminals 4, 5 and 6: valve closed contact.
Connection (fi g. M)
The terminal strip is of the plugging type to facilitate connection.
1. Remove the free part of the terminal strip, introduce
the electrical cable (max. dia. 10 mm) through the gland
(Pg 11P).
2. Make the connections as in the diagram. (fi g. K)
3. Reconnect the terminal strip and tighten the gland.
Adjustment
The product is adjusted ex factory.
In case of mis-adjustment, proceed as follows:
1- Manually unscrew the sight dome (fi g. J)
2- Loosen the tightening screw to orient the unit so that cams
A and B are accessible. (fi g. I)
3- Proceed with adjustment.
• Valve without pilot:
Loosen the screw of the upper cam (A) and move the lower
cam to the top until a signal is received; re-tighten the screw
of the cam to the specifi ed torque (a). (fi g. N)
• Valve with pilot:
Loosen the screw of the lower cam (B) and move the upper
cam to the bottom until a signal is received; re-tighten the
screw of the cam to the specifi ed torque (a). (fi g. O)
4- Perform a functional test.
5- Manually screw the cover back on to the specifi ed tighten-
ing torque (b). (fi g. R)
6- If necessary, place the unit into an optimum operating po-
sition and re-tighten the screw to the specifi ed tightening
torque (c). (fi g. P).
Specifi cations (fi g. L1)
– Power supply: 8,2 V DC nominal
– Switching frequency: 800 Hz
– Type of protection of contacts:
II 1G Ex ia IIB T6 Ga
q
II 2G Ex ia IIC T6 Gb
II 1D Ex ia IIIC T 90°C Da
– EC type examination certifi cate no.:
PTB 01 ATEX 2191
BVS 04 ATEX E153
safety parameters
U I
i I
(V) (mA)
15 50
The signalling box complies with the EMC Directive.
Operation:
To prevent electrostatic hazard, clean the plastic surfaces
with a damp cloth only. Do not use solvents.
– Recommended interfaces:
Galvanic separator:
. Pepperl & Fuchs Ref. KFA6-SR2-EX1.W
. MTL instruments Ref. MTL5011B
ZENER barrier:
. MTL instruments Ref. MTL7742
Terminal strip (grip: 2,5 mm
Blue wire: positive (no.3), brown wire:negative (no.2).
517080-001
INSTALLATION AND MAINTENANCE INSTRUCTIONS
Signalling box on series 298-398
valves with dia. 80, 100, 150 & 200 mm operators
Specifi cations (fi g. L)
Power supply: 10 to 30 V DC:
Load current: 200 mA max.
Terminal strip (grip: 2.5 mm
2 ): terminals 1 and 2: valve open contact (red LED),
terminals 4 and 5: valve closed contact (green LED).
Connection (fi g. M)
The terminal strip is of the plug-in type to facilitate connection.
1. Remove the free part of the terminal strip, introduce the
electrical cable (max. dia. 10 mm) through the gland (Pg
11P).
2. Make the connections as in the diagram. (fi g. L)
3. Reconnect the terminal strip and tighten the gland.
Adjustment
The product is adjusted ex factory.
In case of mis-adjustment, proceed as follows:
1- Manually unscrew the sight dome (fi g. J)
2- Loosen the tightening screw to orient the unit so that cams
A and B are accessible. (fi g. I)
3- Proceed with adjustment.
• Valve without pilot:
Loosen the screw of the upper cam (A) and move the lower
cam to the top until a signal is received; re-tighten the screw
of the cam to the specifi ed torque (a). (fi g. N)
• Valve with pilot:
Loosen the screw of the lower cam (B) and move the upper
cam to the bottom until a signal is received; re-tighten the
screw of the cam to the specifi ed torque (a). (fi g. O)
4- Perform a functional test.
5- Manually screw the cover back on to the specifi ed tighten-
ing torque (b). (fi g. R)
6- If necessary, place the unit into an optimum operating po-
sition and re-tighten the screw to the specifi ed tightening
torque (c). (fi g. P).
Intrinsically safe inductive contacts to ATEX standards
Connection (fi g. M)
1. Introduce the electrical cable (max. dia. 10 mm) through
the gland (Pg 11P).
2. Make the connections as shown in the diagram. Make sure
to connect the electrical continuity terminal (no.1), blue cable
terminal "-" (no.2), brown cable terminal "+" (no.3) (fi g. L1).
3. Tighten the cable gland.
Adjustment
The product is adjusted ex factory.
In case of mis-adjustment, proceed as follows:
1- Manually unscrew the sight dome (fi g. J)
2- Loosen the tightening screw to orient the unit so that cams
A and B are accessible. (fi g. I)
3- Proceed with adjustment.
P L C
• Valve without pilot:
I I I
(mW) (H) (nF) Loosen the screw of the upper cam (A) and move the lower
cam to the top until a signal is received; re-tighten the screw
120 110 80
of the cam to the specifi ed torque (a). (fi g. N)
• Valve with pilot:
Loosen the screw of the lower cam (B) and move the upper
cam to the bottom until a signal is received; re-tighten the
screw of the cam to the specifi ed torque (a). (fi g. O)
4- Perform a functional test.
5- Manually screw the cover back on to the specifi ed tighten-
ing torque (b). (fi g. R)
6- If necessary, place the unit into an optimum operating po-
sition and re-tighten the screw to the specifi ed tightening
torque (c). (fi g. P).
2
) :
3
GB
Inductive contacts
2 ):
517080-001