Delta S71 User Manual
INSTALLATION, OPERATING AND MAINTENANCE
REAR FRONT
SPDT
2 x SPDT
NC = NORMALLY CLOSED
BROWN
BLUE RED
BROWN
BLUE RED RED
BROWN
BLUE
NC
COM
NO NC
COM
NO NC
COM
NO
2 x SPDT
MIN
IN ASE
N.O. N.O.
7 (0.27)
18 (0.7)
1.8 M
SLIDING COMPRESSION GLAND
75 (2.95)
9.5 (0.37)
49 (1.92)
216 (8.5)
M4 EARTH
FIXING
CRS
FIG 5
174 (6.85)
77 (3.03) 70 (2.75)
70 (2.75)
DIM B
RANGE DIM A DIM B
ALL
103
45
M4 EARTH
FIXING CENTRES
FIXING
CRS.
SPACERS
(SUPPLIED LOOSE
DIMENSIONS FOR GUIDANCE ONLY mm (inch es)
154 (6.06)
174 (6.85)
77 (3.03)
70 (2.75)
10 (0.39)
70 (2.75)
DIM A
DIM B
RANGE
DIM A
50 (1.96)
GENERAL
The unit is manufactured, checked and supplied in
accordance with our published specification, and when
installed and used in normal or prescribed
applications, with the lid in place and within the
parameters set for mechanical and electrical
performance, will not cause danger or hazard to life or
limb.
HEALTH AND SAFETY AT WORK ACT 1974
WARNINGS
1. THE USERS ATTENTION IS DRAWN TO THE
FACT THAT, WHEN THE UNIT IS ‘LIVE’ WITH
RESPECT TO ELECTRICAL OR PRESSURE
SUPPLIES, A HAZARD MAY EXIST IF THE
UNIT IS OPENED OR DISMANTLED.
2. UNITS MUST BE SELECTED AND INSTALLED
BY SUITABLY TRAINED AND QUALIFIED
PERSONNEL IN ACCORDANCE WITH
APPROPRIATE CODES OF PRACTICE SO
THAT THE POSSIBILITY OF FAILURE
RESULTING IN INJURY OR DAMAGE CAUSED
BY MISUSE OR MISAPPLICATION IS
AVOIDED.
OPERATING PRINCIPLES
A closed system containing an equilibrium of liquid and
vapour of a suitable volatile chemical or gas is used to
sense the process temperature. This pressure is
applied to the diaphragm which transmits a force,
proportional to the temperature, to an operating shaft.
The shaft is restrained by an adjustable spring. When
the force on the shaft overcomes the spring load the
shaft moves and operates a switch or switches. On
reduction of the applied temperature the force applied
ot the shaft also falls, the shaft is restored to its
original position by the spring, and the switch resets.
INSTALLATION
The instruments are designed to be mounted vertically
with the process connection underneath. However,
mounting up to 45° from the vertical in any plane is
acceptable, although a small calibration shift may
occur. Select the mounting point so as to avoid
excessive shock, vibration or temperature fluctuation.
Instruments should be mounted to avoid excessive
heat transfer from the process lines or adjacent plant.
To avoid undue stresses being imparted to the
instrument when wall / panel mounted, it is
recommended that a short length of flexible line be
installed between the instrument and process line.
Take care to select and install adaptors to the
electrical entry that do not reduce the enclosure
degree of protection.
NOTE: Enclosure Codes H, T & B for NEMA 4X use.
To ensure performance of enclosure, careful
installation and sealing of cable gland in situ is
required.
When fitting the instrument lid make sure the ‘O’ ring is
in good condition and fitted correctly.
SET POINT
ADJUSTER
FIG 2
SET POINT
LOCK
FIG 3
COM = COMMON
NO = NORMALLY OPEN
SPDT
NC = NORMALLY CLOSED
COM = COMMON
NO = NORMALLY OPEN
SET POINT
LOCK
MA
COM
N.C. N.C.
MAX
SWITCH
COM
REAR
FIG 1A
FRONT
SWITCH
FIG 1B
EARTH / GROUND
EARTH / GROUND
SET POINT
ADJUSTER
INSTRUCTIONS FOR VAPOUR PRESSURE
SERIES S70 SOVEREIGN
TEMPERATURE SWITCHES
(MODEL S71)
ISSUE F 03/10
PRODUCT CODE
ENCLOSURE
MODEL
ELECTRICAL ENTRY
MATERIAL OF WETTED PARTS
RANGE
SWITCHING OPTIONS
PROCESS CONNECTION
OPTIONS AND TREATMENTS
SPECIAL ENGINEERING
On enclosures H, R, T, U, B remove the lid using an
appropriate tool if tight eg edge of a spanner or metal
rod (see fig 8).
WARNING: CHECK THE CONNECTION THREAD
SIZE AND SPECIFICATION ON THE UNIT TO AVOID
MISMATCHING WITH THE PROCESS
CONNECTION ADAPTOR. SEE DIGIT 11 OF
PRODUCT CODE.
Capillary version
Mount the sensing bulb so that the capillary end is
above the bulb and the bulb is level with, or no more
than 250 mm below the base of the instrument. The
bulb is fitted with a sliding compression gland to
accommodate different thermowells.
ARMOURED
CAPILLARY
FIG 4
THREADED ½” NPT EXT
9.5 (0.37) DIA
THREADED ½” NPT EXT
SEMI RIGID EXTENSION BULB
In the interest of development and improvement Delta Controls Ltd, reserve the right to amend without notice,
details contained in this publication. No legal liability will be accepted by Delta Controls Ltd, for any errors,
YOUR TRUSTED PARTNER IN PROCESS INSTRUMENTATION
DELTA CONTROLS LIMITED, ISLAND FARM AVENUE, WEST MOLESEY, SURREY KT8 2UZ
T +44 (0) 208 939 3511 F +44 (0) 208 783 1163 E sales@delta-controls.com W www.delta-controls.com
Registered Office Registered in England No 5369683
When fitting the instrument lid make sure gaskets and
‘O’ rings are in good condition and fitted correctly.
WIRING Fig 1A Enclosures H, R, T, U, B
WIRING Fig 1B Enclosures A, W
WIRING (Fig 1A & 1B)
Wire in accordance with local and National codes.
Use cables no larger than 2.5 mm2 (14 AWG). Deliver
electrical connection through a suitable cable gland
which will maintain the IP rating of the instrument.
Insert bare wires fully into the terminal block and
tighten securely. Keep wiring tails to a minimum and
check that wires do not interfere with the operating
mechanism. Use the earthing points provided.
CERTIFIED ENCLOSURES
All series S70 temperature switches can be supplied
with enclosures for use in hazardous areas to the
following standards:
Zone 1 (Div 1) IEC 79-1
BS 5501: Parts 1 and 5: EN50 014 and EN50 018
CENELEC. Codes ‘H’ for aluminium EEx d IIC T6,
and ‘R’ for stainless steel EExd IIC T6.
DIV 1 (NEC 500)
Class I Groups C and D, Class II Groups E, F and G.
Codes ‘T’ for aluminium and ‘U’ for stainless steel.
The above mentioned enclosures are suitable for
outdoor use rated IP 66 / NEMA 4. 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.
Japanese Zone 1.
Same as CENELEC Zone 1 IEC 79 with additional
label and alternative terminal arrangement. Code ‘B’
for aluminium IIC T6. Refer to appropriate Japanese
standards for guidance on installation and use.
Electrical Adaptors
Use only certified adaptors for Zone 1/Div 1.
WARNING: IT IS A REQUIREMENT OF SAFETY
THAT AT LEAST 5 FULL THREADS ARE ENGAGED
BETWEEN THE ADAPTOR AND CONDUIT ENTRY.
References for Selection and Installation
BS 5345 Part 3 for Enclosure Codes H and R.
BS 5501 Part 1 for Enclosure Codes H and R.
BS 5490 IEC 529 IP RATING (Ingress Protection)
NEC ARTICLE 500 for Enclosure Code T and U.
MAINTENANCE
Inspections should be carried out at quarterly to yearly
intervals depending upon operating conditions.
Isolate the unit from process and power and remove
the lid. Check all terminals for tightness. Check that
cable tails are not fouled or chafed. Check for internal
condensation. Rectify as necessary.
It is recommended that instruments used to provide an
alarm are operated periodically to ensure they are
functioning correctly.
If further maintenance is required seek advice from
DELTA CONTROLS before attempting repair or
replacement of parts.
RANGES
DIA
RANGES
omissions or amendments.
MODEL S71
MODEL S71
ALL
154 (6.06)
FIXING CENTRES
SCREW
ELECTRICAL ENTRY
(4.05)
DIMENSIONS FOR GUIDANCE ONLY mm ( inches)
DIM A DIM B
103
(4.05)
(1.77)
W ENCLOSURE
(1.77)
SCREW
ELECTRICAL ENTRY
45
SPACERS (SUPPLIED LOOSE
WHEN APPLICABLE)
WHEN APPLICABLE)
A ENCLOSURE
DIM A
FIG 6
CAUTION
Moving parts have been treated with a water repelling
lubricant before leaving the factory. Occasional
inspection and the application of a water repelling
lubricant is recommended to ensure moving parts
remain free under all conditions.
WARNING: DOES NOT APPLY TO OXYGEN
SERVICE.
Zone 1 Enclosures (H, R, T, U, B)
Thread seal and contact surfaces must be lightly
lubricated using a non-setting non-corrosive grease
compatible with the lid seal. Do not use copper
bearing grease. Screw on lid hand tight making sure
that mating surfaces of the lid and enclosure are in
contact. Re-tighten the lid lock screw.
WARNING: IT IS A SAFETY REQUIREMENT THAT
AT LEAST 5 FULL THREADS ARE ENGAGED WHEN
THE UNIT IS IN OPERATION. NEVER OPERATE
THE UNIT UNLESS THIS CONDITION IS MET. DO
NOT USE GREASES OR LUBRICANTS NOT
COMPATIBLE WITH THE ENVIRONMENT OR
PROCESS.
Weather-proof Enclosure (W)
If lid gasket is dried out or damaged, replace with new
greased gasket. Make sure gasket aligns correctly
with sealing faces.
Stainless Steel Weather-proof Enclosure (A)
Check gasket. If damaged, replace.
OPERATION
Temperature switches are supplied calibrated against
falling temperature unless otherwise specified. Set
Point adjustment refers to falling temperature.
Switching differential is the difference between the set
point and the operating value on rising temperature.
Before commencing adjustments or removing the lid,
isolate the instrument from process and power. For
opening details see Figs 5, 6, 7, 8.
Set Point Adjustment: Models S71 (Figs 2 & 3)
1. Isolate the instrument from process.
2. Adjustment may be carried out with the unit live.
3. Loosen both cover screws.
4. Remove the lid to allow access.
5. Using a spanner rotate the adjuster to obtain the
desired setting. Turn right to left to increase the set
point and left to right to decrease the set point. An
approximate setting is shown by the adjuster edge
against a reference scale.
6. Replace cover and tighten screws.
Note: For accurate setting, a suitable temperature
gauge should be used in conjunction with the above
procedure. Do not attempt to set the switch outside
the scale limits. Though the unit may be set anywhere
within its operation range, for optimum performance, it
is good practice to have a set point value between
25% and 75% of span.
REPLACEMENT PARTS
Use only factory authorised parts and procedures.
The only parts normally recommended for site
replacement are the microswitches. However, in some
circumstances other spares kits are available. Apply
for details quoting the serial number and full product
code.
WARRANTIES – SEE CONDITIONS OF SALE
All Dimensions mm (inches)
140 (5.51)
100 (3.93)
FIXING CENTRES
LID LOCKING SET S CREW (M4)
LOOSEN TO REMOVE LID
MODE L S71
RANGE DIM A DIM B
ALL
RANGES
(5.35)67(2.63)
To remove lid on enclosures H, R, T, U, B loosen and rotate lid
locking device (refer to fig). Where lid is tight use a flat bar,
refer to recommended sizes below. Material needs to be hard
chrome steel spanner grade.
The edge of a spanner may be used.
ROTATE TO REMOV E
M5 EARTH
FACILITY
ELECTRICAL ENTR Y
MOUN TING HOLES 8 mm DIA
SPACERS (SUPPLIED LOOSE WHEN
APPLICABLE)
136
DIMENSIONS FOR G UIDANCE ONLY mm (inches)
H, R, T, U, B ENCLOSURE
350 (13.7)
MIN
DIM B
FIG 7
R 3.5 (0.13)
FIG 8
Stock No: 002522/S71
WIRING
Pollution degree
TAB L E A
– MICROSWI TC H R A T I N G S
C O D E
U L / C S A
IEC 9 4 7
-5-
1 / EN 60 9 4 7
-5-
1 RATING
D e s i g n a t i o n
VA
R A T I N G
0 . 6 / 0 . 3 A @
A C 1 4 /
AC 4 3 2
7 2
0 . 8 k V
2
5 0
0 . 2 2 / 0 . 1 A @
D C 1 3 /
D C
2 8 2 8
0 . 6 / 0 . 3 A @
A C 1 4 /
A C
4 3 2 7 2
0 . 8 k V
2 5 0 V
0 . 2 2 / 0 . 1 A @
D C 1 3 /
D C
2 8 2 8
0 4
1 A @ 1 2 5 V AC
R E S I S T I V E ( I E C 1 0 5 8
-
1 / E N 6 1 0 5 8
-
1 )
0 . 6 / 0 . 3 A @
A C 1 4 /
A C
4 3 2 7 2
0 . 5 k V
2 5 0 V
0 . 2 2 / 0 . 1 A @
D C 1 3 /
D C
2 8 2 8
0 G
A C 1 4 /
A C
2 1 6 3 6
0 . 5 k V
1 2 5 V
0 . 3 A @ 1 2 0
V A C
0 C
0 . 8 k V
2 5 0 V
0 . 6 / 0 . 3 A @
A C 1 4 /
A C
4 3 2 7 2
0 . 6 / 0 . 3 A @
A C 1 4 /
A C
4 3 2 7 2
0 . 8 k V
2 5 0 V
0 . 2 2 / 0 . 1 A @
D C 1 3 /
D C
2 8 2 8
0 . 6 / 0 . 3 A @
A C 1 4 /
A C
4 3 2 7 2
0 . 5 k V
2 5 0 V
0 . 2 2 / 0 . 1 A @
D C 1 3 /
D C
2 8 2 8
REDUCER
STRAP
ENCLOSURE WALL
Low Voltage Directive (LVD) – 2006/95/AC. Switch products with enclosure codes ‘W’ and
‘A’ supplied CE-marked must be installed and used in accordance with the main instructions
and this addendum supplied with each product. Products rated lower than 50V ac and 75 V dc
are outside the scope of the LVD, and therefore, do not require CE-marking under this
directive. The LVD does not apply to products with enclosure codes ‘H’, ‘K’, ‘R’, ‘M’, ‘N’ for use
in hazardous areas. Switch products with enclosure codes ‘H’, ‘K’, ‘R’, ‘M’, ‘N’, are covered by
the Explosive Atmospheres Directive ATEX – 94/9/EC and when CE-marked will indicate
compliance with this directive alone. The following directives do not apply to switch products
manufactured by Delta Controls:
Electromagnetic Compatibility EMC – 2004/108/EC
Machinery Safety Directive MSD – 2006/42/EC
ENCLOSURE ‘W’
Cable Glands and adaptors – If enclosure ‘W’ is supplied with a through hole of 22 mm
blanked with a blind grommet. Discard the grommet and fit a suitable proprietary brass or
nylon M20 cable gland with thread length of 10 mm and locknut. Fit the nylon reducer provided
to the inside and a fibre washer to the outside. See diagram 1.
Alternately, the enclosure may be supplied from the factory with a threaded adaptor ready to
accept the customer’s gland or conduit system.
Alternatives:
i) a metal or nylon adaptor may be used to accommodate other sizes of gland eg NPT, or
conduit system. See diagram 2.
ii) an elbow kit may be supplied to enable the entry to be rotated axially through 90° and
radially through 360°. See diagram 3.
Earthing / grounding – The user must make suitable local earthing arrangements, if required,
to ensure that metal glands are earthed.
An earthing point is provided inside the enclosure. If this is disturbed in any way it must be
reassembled correctly to be an effective earth and prevent ingress. See diagram 4. When
removing the lid slacken the M4 nut first and ensure it is re tightened whenever the lid is
replaced. See diagram 4.1.
ENCLOSURE ‘A’
Cable Glands and adaptors – Enclosure ‘A’ is supplied with an M20 x 1.5 tapped hole. Use a
suitable stainless steel cable gland and sealing washer. Alternately the enclosure may be
supplied with a threaded adaptor fitted at the factory ready to accept the customer’s gland or
conduit system. See diagram 5.
Earthing / grounding – Bonding between the enclosure and gland / adaptor will be achieved
when both parts are screwed together. An earthing point is provided inside the enclosure. If
this is disturbed in any way it must be reassembled correctly to be an effective earth and
prevent ingress. See diagram 4.
EARTHING / GROUNDING OF PROCESS CONNECTION AND BACK PLATES – All the
internal dead metal work is bonded to the enclosure earthing point. Due to requirements of
sealing, the process connection and back plates may be isolated from the earthing point. Do
not, therefore, rely on either for earthing, instead always use the earthing point provided. If
required, the process connection and back plates may be bonded locally. Never use the
process connection or inlet pipe for locally grounding welding equipment unless it is separately
earth bonded.
Declaration of Conformity
We: Delta Controls Ltd
Island Farm Avenue
West Molesey
Surrey, UK
KT8 2UZ
As the manufacturers of the apparatus listed, declare under our sole
responsibility that the products listed below:
Pressure, Pressure Difference, Temperature & Flow switches series “W” or “A”:
201, 202, 203, 281, 204, 207, 208, 209, 231, 232, 233, 234, S21, S22, S24, GR2, GR4, VM2, VM4.
301, 303, 304, 381, 384, 306, 386, 310, 316, S31, S34, GR3, GR6.
721, 731, 771, 722, 732, 772, 723, 733, 773, 781, 734, 774, 741, 742, 743, 744, S71, GR7.
131.
To which this declaration relates are in conformity with the following relevant
standards or parts thereof:
EN 60947-1 :1992 Low voltage switch gear and control-gear-general rules.
EN 60947-5-1:1992 Low voltage switch gear and control-gear-control circuit devices and switching
elements.
EN 60529: 1991 Specification for classification of degrees of protection provided by enclosures.
EN 60950:1992 Safety of information technology equipment including electrical business equipment:
section 2.5.
BS 6134:1991 Specification for pressure and vacuum switches.
And thereby conforms to the requirements of the Low Voltage Directive
73/23/EC amended by 93/68/EEC.
………………….
R. Harrison
Managing Director
Original dated 22nd June 2000
Rev. B dated 12
th
August 2009
Signed:
conditions where condensation may readily form, then sealed contacts should be used. See
Table A codes 08/09, 0G/0H, H2/H3/H6.
Electrical isolation – These products are not suitable for electrical isolation. Always isolate
circuit separately to carry out any electrical work.
0 0
&
0 1
0 2
&
0 3
&
0 5
0 8
&
0 9
&
0 H
0 D
H 2
&
H 3
&
H 6
S W I T C H
M I C R O S W I T C H
( R E S I S T I V E )
5 A @ 1 1 0 / 2 5 0
5 A @ 1 1 0 / 2 5 0
2 A @ 3 0 V D C
1 A @ 1 2 5 V A C
* 1 0 0 m A @ 3 0
1 1 0 / 2 5 0 V A C
5 A @ 3 0 V D C
* 1 A @ 3 0 V A C
5 A @ 1 1 0 / 2 5 0
5 A @ 1 1 0 / 2 5 0
2 A @ 3 0 V D C
5 A @ 1 1 0 / 2 5 0
2 A @ 3 0 V D C
– all products are suitable for use in pollution degree 3. For extreme
R A T I N G
* S E E N O T E
V A C
V A C
V D C
* 5 A @
& 3 0 V D C
V A C
V A C
V A C
( I e I U e )
Uimp
Ui
V
1 2 0 / 2 4 0 V A C
1 2 5 / 2 5 0 V D C
1 2 0 / 2 4 0 V A C
1 2 5 / 2 5 0 V D C
1 2 0 / 2 4 0 V A C
1 2 5 / 2 5 0 V D C
1 2 0 / 2 4 0
V A C
1 2 0 / 2 4 0 V A C
1 2 5 / 2 5 0 V D C
1 2 0 / 2 4 0 V A C
1 2 5 / 2 5 0 V D C
&
U t i l i s a t i o n
C a t e g o r y
D 3 0 0
R 3 0 0
D 3 0 0
R 3 0 0
D 3 0 0
R 3 0 0
E 1 5 0
D 3 0 0
D 3 0 0
R 3 0 0
D 3 0 0
R 3 0 0
The el e c t r i c a l rat i n g is dep e n d e n t on th e microswitc h fi t ted to the
instrume nt. T h e elect ric a l ra t ing is de f i n e d by eac h ap pro val th at
the mic r o s w i t c h c omplies wi t h a nd is s h o wn o n t he prod uct
nameplate , i e U L / CSA, or IE C . I t s h o u l d b e n o t ed t hat the switch
must b e u s ed wit h i n the elect r i c a l rating s p e c i f ied f r o m t he app r o v a l
you requir e. T a b l e A l i s t s the actual IEC rat i n g s a g a i n s t the
Designati o n & Utilis a t i o n Category m a r k ed on t h e namepl at e . In t h e
absence of an y ve r i f i c a t i on by UL / CS A t h e micros wit c h
*m anufact u r e r ’ s rating i s s pecified i n bold i t a l i c s . If i n doubt, s e e k
guidance f r o m f a c t o ry.
DIAG 1
LOCKNUT
NYLON 22/20
DIAG 3
GLAND
FIBRE
SCREW
WASHER
DIAG 4.1
M4 NUT
M4 SINGLE
COIL WASHER
M4 STUD
LID
EARTH STRAP
ELBOW ASSY
ENCLOSURE WALL
PROPRIETARY
FIBRE WASHER
GLAND
‘W’ CABLE GLAND ASSY
ENCLOSURE
WALL
GASKET
O RING
SEAL
½" NPT Pg 13.5
M20 X 1.5 ¾ ET
M4 SCREW
M4 PLAIN
WASHER
EARTH
BASE
DIAG 2
‘W’ ADAPTOR ASSY
EARTH LABEL
SINGLE
COIL
WASHER
NUT
PLAIN
WASHERS
DIAG 5
M20 x 1.5
NUT
STAR WASHER
ENCLOSURE
CABLE GLAND /
CONDUIT ADAPTOR
DIAG 4
(EXTERIOR)
BONDED SEAL
EARTHING ASSY
FIBRE WASHER
ADAPTOR
‘A’ ADAPTOR
Make
Brea k
SCREW
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