Delta-controls GR2_4 Manuel d'utilisateur

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GENERAL: These instructions are to be
used when installing and operating GR
series pressure switches types GR2 and
GR4.
TYPICAL MODEL NUMBER: W GR2 A
A EA HS F See the switch data plate,
accompanying paper work and / or the
product catalogue for the full definition of
the model(s) you have.
CAUTION: The unit should not be
dismantled without isolating from
pressure source and electrical power.
The microswitch assembly with factory
sealed leads has been carefully
positioned at the factory. Any
disturbance may render this unit
inoperative.
INSTALLATION: Install in such a way as
to avoid stresses, excessive shock or
vibration being imparted to the switch
during operation. It is recommended that
either the process connection or the
electrical conduit connection be flexible
enough to avoid stresses. Always use a
suitable spanner to support the pressure
connection and electrical conduit.
The
Instruments are designed to be mounted
vertically with the process connection
underneath. However, mounting up to 45 deg
from the vertical in any plane is acceptable,
although a small calibration shift may occur.
WIRING: The leads are factory sealed so
it is unnecessary to seal the conduit to the
conduit nipple. However, the leads must
be suitably protected against mechanical
damage and terminated in a suitable
junction box or terminal facility in
accordance with local and national codes.
Refer to the wiring diagram (Fig 1).
Junction Box (when fitted): Some
models may be provided with an integral
weatherproof or EExe junction box. Wire
in accordance with local and national
codes using cables no larger than 14
AWG.
SAFETY: Ensure that site safety
practices and procedures are followed
before working on the installed switch.
PRODUCT CODE
ENCLOSURE
MODEL
ELECTRICAL ENTRY
MATERIAL OF WETTED PARTS
RANGE
SWITCHING OPTIONS
PROCESS CONNECTION
OPTIONS AND TREATMENTS
SPECIAL ENGINEERING
To alter the set point:
1. Loosen both cover screws and rotate
cover to allow access.
2.
Using a suitable screwdriver, rotate
the adjuster, right to left to increase
the setting, and left to right to
decrease the setting.
OPERATION: Adjustment of the set point
may be carried out with the unit ‘live’.
Refer to fig 2.
As a guide, one complete revolution of the
adjuster will alter the set point by
approximately 15% of the range. For
accurate setting, a suitable pressure
gauge must be used in conjunction with
the above procedure. Do not attempt to
set the unit outside its range limits.
Though the unit may be set anywhere
within its range, for optimum performance,
it is good practice to have a set point
value between 25% and 75% of the range.
HAZARDOUS AREAS:
CENELEC: Models beginning with code
‘H’ or ‘R’ are also suitable for use in areas
where explosion hazards may exist due to
flammable gases or vapours.
ATEX NUMBER Baseefa02ATEX0214X
EN60 079-0: 2006
EN60 079-1: 2004
II 2G Exd IICT6 (Tamb –40 deg c to +60
deg c) or Exd IIC T4 (Tamb –40 deg c to +85
deg c).
G: Div 1 and 2, by virtue of the
hermetically sealed microswitch, UL file ref
E105842 and CSA file ref LR 67110-5.
Refer to the National Electrical Code,
Article 500 for installation guidance.
JUNCTION BOXES
Code ‘C’: see fig 3
Code ‘D’: same dimensions as code ‘C’ but
EExe approved for use in Zone 1.
Code ‘J’: see fig 4. EExe approved for use in
Zone 1.
Cert Baseefa03ATEX0089X
Certified II2G EExe II T6
When used at 11A, cabling to be 2.5 mm
2
.
Special conditions for safe use-code J
1) Not more than 1 single or multiple lead shall
be connected into either side of any terminal
2) Leads to be insulated for the appropriate
voltage. Insulation to extend to within 1mm of
the terminal throat.
3) All terminal screws used and unused to be
tightened down
4) Circuits to be protected by excess current
protection, which shall operate within 4 hours at
1.5 X the designed load current.
5) All cable entries shall maintain IP66
minimum
6) Kwikstik 3507 inseal gasket must be fitted
between GR series adaptor and enclosure to
ensure IP66 ingress protection.
When weatherproof junction box code ‘C’ is
fitted the unit must not be used in hazardous
areas unless the circuit or system to which it is
connected is Intrinsically Safe.
Note: Should the diaphragm fail the process
will vent to atmosphere via a control orifice
without pressurising the switch enclosure.
Periodically ensure the vent area does not
Become blocked and the vent plug has not
degraded. Ensure that the vent area is not
obstructed
.
MAINTENANCE: No maintenance is normally
necessary with these units. However, if a
junction box is fitted depending on the
installation conditions, it is recommended that
the wiring is checked periodically for
contamination and security. Take appropriate
measures to rectify any faults.
REPLACEMENT PARTS: Use only factory
authorised parts and the fitting instructions that
are supplied with these
WARRANTIES: See CONDITIONS OF SALE.
ISSUE I 03/10
INSTALLATION AND OPERATING
INSTRUCTIONS
GR SERIES PRESSURE SWITCHES
TYPE GR2/4
4.3
7
111
.0
'A'
AP
PR
O
X
Fig 2
FLYING LEADS CODE ‘A’
½
NPT
GROUND
SCREW ‘H’
OR ‘R’
MOUNTING
HOLES FOR
M5 SCREWS
VENTING DEVICE
(WHEN FITTED) ‘H’
OR ‘R’
PROCESS
CONNECTOR
UNITS
DIM
‘A’
INCHES
1.85
½”NPT MALE
MM
47
INCHES
1.46
OTHERS
MM
37
Fig 3
JUNCTION BOX
CODES ‘C’ & ‘D
4 MOUNTING
HOLES 4.5
mm DIA
SUITABLE
FOR M4
SCREWS
MAX HEAD
DIA 7.5 mm
CONDUIT ENTRY
M20 x 1.5
20
0.7
9
15.
0
0.5
9
45.
0
1.7
7
17
1.0
6.7
3
JUNCTION BOX
FIBRE
WASHER
DIAG 1
CABLE GLAND ASSEMBLY
JUNCTION BOX
FIBRE
WASHER
DIAG 2
ADAPTOR ASSEMBLY
All enclosures are suitable for outdoor use
and the majority of products are considered
by Delta controls ltd to be rated IP66. Refer
to the product label and/or leaflet. Only
operation, maintenance or repair procedures
either contained herein or approved by Delta
Controls may be used, to avoid rendering the
equipment unsafe in operation and/or
nullifying the Certification.
NO MODIFICATIONS ARE PERMITTED.
Special condition for safe use
The leads shall be suitably protected against
mechanical damage and terminated in a suitable
junction box or terminal facility
UL and CSA:
All models with flying leads
are suitable for installing in areas where
explosion hazards may exist due to
flammable gases or vapours, flammable
liquids or combustible dusts, Class I
Groups A, B, C, D: Class II
Groups E, F,
F i g 4
MO DE L GR 2/4 W IT H TE R MIN AL EN C LOS U R E C OD E J
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Résumé du contenu

Page 1 - ISSUE I 03/10

GENERAL: These instructions are to be used when installing and operating GR series pressure switches types GR2 and GR4. TYPICAL MODEL

Page 2 - 0.3A @ 120 VAC

Low Voltage Directive (LVD) – 2006/95/AC. Switch products with enclosure codes ‘W’ and ‘A’ supplied CE-marked must be installed and

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