Delta 310 User Manual

C O MM O N

NORM AL LY

CLO S E D

Fig 1

Fig 2

ADJUSTER

MICROSWITCH

RANGE

5% FS MIN

DEAD

NORMAL

REVERSE

Fig 3

102 (4)

51 (2)

13 (0.5)

102 (4)

16 (0.62) 16

70 (2.75)

112 (4.4)

4 MOUNTING FEET WITH

ELECTRICAL ENTRY

PROCESS

ALL DIMENSIONS mm (inches)

PROCESS

FIXING

14.5

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 MIS-APPLICATION IS AVOIDED.

3. TYPE W AND A ENCLOSURES HAVE A SAFETY BLOW-OUT DISC FITTED IN THE REAR OF THE ENCLOSURE TO PREVENT DANGEROUS PRESSURISATION OCCURRING IN THE EVENT OF A SEAL FAILURE. THIS MUST NOT BE OBSTRUCTED DURING INSTALLATION. DO NOT REMOVE OR REPLACE WITH ANY OTHER DEVICE NOT APPROVED BY DELTA CONTROLS.

CAUTIONS

1. Maximum single-ended or out-of balance pressure or vacuum; Ranges B3, B5, C2, C5 = 60 mbar Range D5 = 100 mbar Ranges D2, D8, F1, G0, G8 = 7 bar

All model 310 ranges are only suitable for dry gaseous mediums. Impulse lines should be sized and installed to avoid condensation build up affecting accuracy.

A diaphragm is used to sense the difference between two pressures applied to either side of the diaphragm. The diaphragm transmits a force proportional to the applied pressure difference to an operating beam. The beam is restrained by an adjustable spring. When the force on the beam overcomes the spring tension, the beam moves and operates a switch or switches. On reduction of the applied pressuredifference the force applied to the beam also falls, the beam is restored to its original position by the spring, and the switch resets.

NOTE: For accurate setting, a suitable pressure

gauge must be used in conjunction with the above procedure. Do not attempt to set the switch outside the scale limits. Thought 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 recommended for site replacement is the microswitch.

WARRANTIES – SEE CONDITIONS OF SALE.

NORM AL LY

OPEN

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,

INSTALLATION, OPERATING AND MAINTENANCE INSTRUCTIONS FOR DIAPHRAGM ACTUATED PRESSURE

DIFFERENCE SWITCHES

SERIES 310/316

ISSUE G 07/09

PRODUCT CODE

ENCLOSURE

MODEL

ELECTRICAL ENTRY

INSTALLATION

The instruments are designed to be mounted vertically with the process connection underneath as shown in Figs 4 & 5, using the mounting brackets provided. 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 line or adjacent plant.

If sudden changes of pressure (pulsations) are likely then we recommend that snubbers are fitted between the process line and switch.

WARNING: THE PROCESS CONNECTION THREAD SIZE IS Rc1/4 AVOID MISMATCHING WITH THE PROCESS CONNECTION ADAPTOR. AVOID OVER-TIGHTENING ADAPTORS OR DAMAGE MAY OCCUR.

WIRING (Fig 1)

Wire in accordance with local and National codes. Use wire suitable for terminal screw and cup washer provided on the microswitch. Deliver electrical connection through a suitable cable gland which will maintain the IP rating of the instrument. Keep wiring tails to a minimum and check that wires do not interfere with the operating mechanism. Use the earthing points provided.

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

MATERIAL OF WETTED PARTS

RANGE

SWITCHING OPTIONS

replacement of parts.

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

PROCESS CONNECTION

OPTIONS AND TREATMENTS SPECIAL ENGINEERING

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

SCREW

LOCK

SPRING

PRESSURE

DIFFERENCE

PRESSURE

DIFFERENCE

BAND

omissions or amendments.

YOUR TRUSTED PARTNER IN PROCESS INSTRUMENTATION

Registered Office Registered in England No 5369683

ensure moving parts remain free under all conditions.

WARNING: DOES NOT APPLY TO OXYGEN SERVICE.

OPERATION

Pressure difference switches are supplied calibrated against falling pressure difference unless otherwise specified. Set Point adjustment refers to falling pressure difference. Switching differential is the difference between the set point and the operating value on rising pressure difference. For opening details see Fig 4 and 5.

FIXING CENTRES

127 (5)

51 (2)

102 (4)

CENTRES

FIXING CENTRES

HP LP HP

51 (2)

13 (0.5)

7 (0.67)

(1.33)

142 (5.6)

102 (4)

FIXING CENTRES

51 (2)

(1.25)

Set Point Adjustment: Models 310, 316 (Fig 2)

1. Isolate from process and power.

2. Remove the instrument lid.

3. Loosen locking plate by slackening the M3

4. Rotate the adjuster screw with a plain blade

5. Re-tighten the locking screw.

6. Replace the instrument lid (see maintenance).

PROCESS CONFIGURATIONS

For normal pressure difference operation, the connections are made to the High Pressure (HP) and Low Pressure (LP) ports as appropriate. For single ended positive pressure operation the HP only is used and the LP is left open to atmosphere.

For single ended negative pressure operation the LP only is used and the HP is left open to atmosphere.

Use a breather/filler in the vacant port of single-ended operation.

COMPOUND RANGES eg –2.5 to +2.5 mbar For normal operation negative pressure is applied to

the LP port whereby the HP port is left open to atmosphere and the set point is between 0 and +2.5 mbar.

For reverse operation, negative pressure may be applied to the HP port whereby the LP port is left open to atmosphere and the set point is between 0 and –2.5 mbar. For positive pressures the opposite applies.

It is recommended the minimum setting to be not less than 5% of Full Scale (FS) either side approaching zero (see Fig 3).

HOLES SUITABLE FOR 6 mm (0.24) DIA FIXING SCREWS

CENTRE LINE

CONNECTIONS

Fig 4

4 MOUNTING FEET WITH HOLES SUITABLE FOR 6 mm (0.24) DIA FIXING SCREWS

ELECTRICAL ENTRY CENTRE LINE

(0.62)

Fig 5

CONNECTIONS

Stock No: 002522/310

hexagon screw. screwdriver to adjust the set point. Rotate

clockwise to increase the set point and counterclockwise to decrease the set point. The scale provides an approximate set value (see note).

(0.62)

(0.8)

98 (3.85)

(1.18)

(2.75)

(0.57)

T A B L E A

– M I C R O S W I T C H R A T I N G S

U L / C S A

I E C 9 4 7

-5-

1 / E N 6 0 9 4 7

-5-

1 R A T I N G

R A T I N G

D e s i g n a t i o n

V A

R A T I N G

0 . 6 / 0 . 3 A @

A C 1 4 / D 3 0 0

7 2

0 0 0 . 8 k

2 5 0 V

0 . 2 2 / 0 . 1 A @

D C 1 3 / R 3 0 0

D C

2 8 2 8

0 . 6 / 0 . 3 A @

A C 1 4 / D 3 0 0

A C

7 2

0 2

0 . 8 k

2 5 0 V

. 2 2 / 0 . 1 A @

D C 1 3 / R 3 0 0

D C

2 8 2 8

0 4

1 A @ 1 2 5 V A C 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 )

ENCLOSURE WALL

SINGLE

PLAIN

STAR WASHER

EARTH

STRAP

M4 STUD

M4 NUT

LID

BASE

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

WIRING

Cable Glands and adaptors – The enclosure 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

ii) an elbow kit may be supplied to enable the entry to be rotated axially through

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 retain ingress protection. 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.

EARTHING / GROUNDING OF PROCESS CONNECTION AND MOUNTING BRACKETS – All the internal dead metal work is bonded to the enclosure earthing point.

Due to requirements of sealing, the process connection and mounting brackets 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 mounting brackets 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

NPT, or conduit system. See diagram 2.

90° and radially through 360°. See diagram 3.

August 2009

Signed:

NUT

WASHERS

M I C R O S W I T C H

( R E S I S T I V E )

* S E E N O T E

C O D E

S W I T C H

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

V A C

V D C

U i

U i m p

Th e electri c a l rating is d e pendent on th e microswitch f i t ted to the instrument. T h e electrical r a t ing is defined b y each approv a l that the mic ro s witch compl i e s with and is shown on the product nameplate, ie UL / CSA, or IEC. It should be noted that the switch m u s t be use d within the electr i c a l rating specified fr o m the approval you r e quire. Table A lists the ac t ual IEC ratings against th e Des i g n ation & Utilis a ti on Ca t e g ory ma r k e d on the nameplate. I n the abs e n c e o f any veri f i c ation by UL / CSA the microswitch *manufacture r ’ s ratin g is sp e c i fied in bold i t a l i cs If in doubt, s e ek guidance f r o m factory.

Pollution degree – all products are suitable for use in pollution degree 3. Electrical isolation – These products are not suitable for electrical isolation. Always isolate

circuit separately to carry out any electrical work.

DIAG 1

LOCKNUT

NYLON 22/20 REDUCER

DIAG 2

ADAPTOR ASSY

EARTH LABEL

COIL WASHER

NUT

FIBRE WASHER

CABLE GLAND / CONDUIT ADAPTOR

DIAG 4

(EXTERIOR)

BONDED SEAL

EARTHING ASSY

( I e I U e )

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