Delta 207 User Manual

INDICATOR

To remove lid on enclosures H,K & M rotate lid locking mechanism and

where lid is t

Recommended size of bar suitable for opening instrument. Material

FIG. 2

FIG. 1

ADJUSTER KNOB

CKING SCREW

LOCKING PLATE

SCALE PLATE

FIG. 4

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 DIAPHRAGM FAILURE. THIS MUST NOT BE OBSTRUCTED DURING INSTALLATION. LEAVE AT LEAST 6MM CLEARANCE BETWEEN THE BACK FACE OF THE ENCLOSURE AND THE MOUNTING SURFACE. DO NOT REMOVE OR REPLACE WITH ANY OTHER DEVICE NOT APPROVED BY DELTA CONTROLS. DO NOT REMOVE AND REFIT BACKPLATE SO AS TO OBSTRUCT THE BLOWOUT DISC.

OPERATING PRINCIPLES

A diaphragm is used to sense the process pressure. Welded to one side of the diaphragm is a sealed evacuated reference chamber which is barometrically compensated. The diaphragm transmits a force proportional to the applied pressure to an operating beam via a lever and welded diaphragm seal which allows motion without loss of vacuum. 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 pressure the force applied to the beam also falls, the beam is restored to its original position by the spring, and the switch resets.

On enclosures H, K and M remove the lid using an appropriate tool if tight, eg edge of spanner or a metal rod (fig 3).

REPLACEMENT PARTS

Use only factory authorised parts and procedures. The only parts recommended for site replacement are the microswitches.

WARRANTIES - SEE CONDITIONS OF SALE

SPDT

REAR FRONT SWITCH SWITCH 2 x SPDT

NC = NORMALLY CLOSED COM = COMMON NO = NORMALLY OPEN FIG.1 shows the state of electrical contacts at atmospheric pressure. Note:- wiring from terminal block to microswitch(es) is reversed to achieve this state.

MODEL A 207

FIG. 5

INSTALLATION, OPERATING AND MAINTENANCE INSTRUCTIONS FOR DIAPHRAGM OPERATED ABSOLUTE

PRESSURE SWITCHES

(MODEL 207)

ISSUE E 09/09

PRODUCT CODE

ENCLOSURE

MODEL

ELECTRICAL ENTRY

MATERIAL OF WETTED PARTS

RANGE

SWITCHING OPTIONS

PROCESS CONNECTION

OPTIONS AND TREATMENTS SPECIAL ENGINEERING

INSTALLATION

The instruments are designed to be mounted vertically with the process connection underneath. They can be mounted either direct to process or to a wall or panel using the backplate 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 lines or adjacent plant.

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

MODELS W, N 207

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,

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

Use a spanner to support the process connection when fitting the instrument. When fitting the instrument lid make sure gaskets or 'O' rings are in good condition and fitted correctly.

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.

WIRING (Fig 1)

Wire in accordance with local and National codes. Use cables no larger than 2.5 mm sq. (14AWG). 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 200 Pressure Switches can be supplied with BASEEFA certified enclosures 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 and "K" for cast iron. EExd IIC T6. Code "M" Cast Iron Exd I T6 for mining. Zone 2 (UK Only) BS 4683: Part 3, Enclosure Code "N". ExN II T6

All the above mentioned enclosures are suitable for outdoor use rated IP 66. 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.

Electrical Adaptors Zone 1. Use only certified adaptors for Zone 1.

WARNING: IT IS A REQUIREMENT OF SAFETY THAT AT LEAST 5 FULL THREADS ARE ENGAGED BETWEEN THE ADAPTOR AND CONDUIT ENTRY. TAKE CARE TO SELECT AND INSTALL ADAPTORS THAT DO NOT REDUCE THE ENCLOSURE IP RATING.

Zone 2. Adaptors used must have equivalent IP rating to

the enclosure and be impact resistant to 7 N.m References for Selection and Installation BS 5345 Part 3 for Enclosure Codes H and K BS 5345 Part 4 for all Enclosure Codes (Intrinsic Safety) BS 5345 Part 7 for Enclosure Code N BS EN 60529 IP RATING (Ingress Protection)

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.

ADJUSTER KNOB LOCKING PLATE

SECONDARY ADJUSTER KNOB

SCALE PLATE

SECONDARY

INDICATOR

FIG. 5

FIG.7

omissions or amendments.

YOUR TRUSTED PARTNER IN PROCESS INSTRUMENTATION

needs to be hard chrome steel spanner grade.

ight use a flat bar (see below) or edge of ring spanner to open

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

Thread seal and contact surfaces must be lightly lubricated using a non-setting non-corrosive grease compatible with the Nitrile lid seal. Do not use copper bearing grease on aluminium. Screw on lid hand tight making sure that mating surfaces of the lid and enclosure are in contact. Retighten 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.

Weatherproof enclosure (W and N)

If lid gasket is dried out or damaged, replace with new greased gasket.

Stainless Steel Weatherproof Enclosure (A)

Check gasket. If damaged, replace.

OPERATION

Pressure switches are supplied calibrated against falling pressure unless otherwise specified. Set Point adjustment refers to falling pressure. Switching differential is the difference between the set point and the operating value on rising pressure. For opening details see Fig 2, 5 & 8.

Set Point Adjustment: Model 207 (Fig 4)

1. Isolate the instrument from process and power.

2. Remove the instrument lid.

3. Loosen the M3 hexagon head locking screw.

4. Rotate the 20 mm A/F hexagon head adjuster knob to move the indicator along the calibrated scale. Rotate clockwise to increase the set point and counter clockwise to decrease the set point.

5. Retighten the locking screw taking care not to overtighten.

6. Replace the instrument lid (See maintenance).

Set Point Adjustment: Model 207/2000 (fig 6)

1. Isolate the instrument from process and power.

2. Remove the instrument lid.

3. Rotate the knurled plastic wheel on the microswitch to adjust the switch differential. Rotate clockwise to increase the differential and counter clockwise to reduce the differential.

4. Replace the instrument lid (see maintenance).

Set Point Adjustment: Model 207/3000 (Fig 7)

1. Isolate the instrument from process and power.

2. Remove the instrument lid.

3. Rotate the secondary adjuster knob to move the secondary indicator along the ‘arrow’ scale. Rotate clockwise to increase the differential and counterclockwise to decrease the differential.

4. Replace the instrument lid (see maintenance).

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. 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.

ADJUST SW ITCHING DIFFERENTIAL

FIG.3

FIG. 6

FIG. 8

Stock No: 002522/207

Registered Office Registered in England No 5369683

–

Switch products with enclosure codes

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

VD 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

ndicate compliance with this

directive alone. The following directives do not apply to switch products

WIRING

h 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

Alternately, the enclosure may be supplied from the factory with a threaded adaptor ready to

Alternatives:

i) a metal or nylon adaptor may be used to accommodate other sizes of gland eg NPT, or

° and

The user must make suitable local earthing arrangements, if required,

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

ut first and ensure it is re tightened whenever the lid is

Enclosure ‘A’ is supplied with an M20 x 1.5 tapped hole. Use a

rnately the enclosure may be

supplied with a threaded adaptor fitted at the factory ready to accept the customer’s gland or

Bonding between the enclosure and gland / adaptor will be achieved

when bot

h 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

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

nstead 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

Pollution degree

all products are suitable for use in pollution degree 3. For extreme

conditions where condensation may readily form, then sealed contacts should be used. See

These products are not suitable for electrical isolation. Always isolate

REDUCER

‘W’ CABLE GLAND ASSY

As the manufacturers of the apparatus listed, declare under our sole responsibility that the products listed

And thereby conforms to the requirements of the Low

Low Voltage Directive (LVD)

‘W’ and ‘A’ supplied CE-marked must

not require CE-marking under this directive. The L

Directive ATEX – 94/9/EC and when CE-marked will i 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 throug

to the inside and a fibre washer to the outside. See diagram 1. accept the customer’s gland or conduit system.

conduit system. See diagram 2. ii) an elbow kit may be supplied to enable the entry to be rotated axially through 90 radially through 360°. See diagram 3.

Earthing / grounding – to ensure that metal glands are earthed.

removing the lid slacken the M4 n replaced. See diagram 4.1.

ENCLOSURE ‘A’ Cable Glands and adaptors –

suitable stainless steel cable gland and sealing washer. Alte conduit system. See diagram 5. Earthing / grounding –

prevent ingress. See diagram 4. EARTHING / GROUNDING OF PROCESS CONNECTION AND BACK PLATES –

not, therefore, rely on either for earthing, i

earth bonded.

Declaration of Conformity

We: Delta Controls Ltd Island Farm Avenue West Molesey Surrey, UK KT8 2UZ

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.

………………….

R. Harrison Managing Director

Original dated 22nd June 2000 Rev. B dated 12

August 2009

2006/95/AC.

Voltage Directive 73/23/EC amended by 93/68/EEC.

Signed:

Table A codes 08/09, 0G/0H, H2/H3/H6. Electrical isolation –

circuit separately to carry out any electrical work.

TABLE A – MICROSWITCH RATINGS

MICROSWITCH

(RESISTIVE)

*SEE NOTE

SWITCH CODE

5A @ 110 / 250 VAC

0.8kV 250V

& 01

5A @ 110 / 250 VAC

0.8kV 250V

2A @ 30 VDC

1A @ 125 VAC

N/A

& 05 *100mA @ 30 VDC

*5A @ 110/250VAC

0.5kV 250V

2A @ 30 VDC

*1A @ 30VAC

0.5kV 125V

& 0H & 30 VDC 0C 5A @ 110 / 250 VAC 0.8kV 250V

5A @ 110 / 250 VAC

0.8kV 250V 2A @ 30 VDC

5A @ 110 / 250 VAC

& H3

0.5kV 250V

2A @ 30 VDC

UL / CSA

RATING

–

IEC 947-5-1 / EN 60947-5-1 RATING

RATING

Uimp

(IeIUe)

0.6/0.3A @ 120/240 VAC

0.22/0.1A @ 125/250 VDC

0.6/0.3A @ 120/240 VAC

0.22/0.1A @ 125/250 VDC

0.6/0.3A @ 120/240 VAC

0.22/0.1A @ 125/250 VDC

0.3A @ 120 VAC

0.6/0.3A @ 120/240 VAC

0.22/0.1A @ 125/250 VDC

0.6/0.3A @ 120/240 VAC

0.22/0.1A @ 125/250 VDC

Designation

Utilisation

Delta 207 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual