Delta 301 User Manual

FIG 2

(HIGH)

(LOW)

FIG 3

SCREW

* INCREASE BY 10mm (0.39)

ON ENCLOSURE N

105 (4.13)

53 (2.08)

DIM B

ALL OTHER

RANGES

RANGE C6D

DIM A

41 (1.61)

95 (3.74)

154 (6.06)

88 (3.46)

DIA C

DIM D

179 (7.04)

113 (4.44)

PROCESS

M4 EARTH

SCREW

ELECTRICAL

ENTRY

CONNECTION

USED ON RANGE C6D ONLY

SPACERS & BOTTOM BRACKETS

*156 (6.14)

61 (2.4)

DIM B

DIM A

154 (6.06)

75 (2.95)

DIM C

DIM D

6.5 (0.25)

139 (5.47)*

183 (7.2)*

7 (0.27)

10 (0.39)

77 (3.03)

117 (4.6)

Fig 6

ELECTRICAL

185 (7. 28)

( 1.53 )

15 6 (6 .14 )

FIG 8

103 (4.05)

45 (1.77)

DIM A

RANGE C6D

RANGES

ALL OTHER

DIM B

55 (2.16)

113 (4.44)

DIM B

DIM A

77 (3.03)

10 (0.39)

183 (7.2)

141 (5.55)

174 (6.85)

157 (6.06)

M4 EARTH SCREW

FIXING

(0.27)

103 (4.05)

126 (4.96)

53 (2.08)

63 (2.48)

DIM. F

DIM. E

E1D, E8D

RANGE C6D

126 (4.96)

192 (7.55)

DIM. D

DIA. C

100 (3.93)

166 (6.35)

96 (3.77)

41 (1.61)

DIM. A

RANGES

ALL OTHER

DIM. B

53 (2.08)

107 (4.21)

10 (0.39)

DIM. F

DIM. E

DIM. D

DIA. C

6.5 (0.25)

7 (0.27)

DIM. B

DIM. A

174 (6.85)

MODELS

* INCREASE BY 10mm (0.39)

(0.27)

CONNECTION

M4 EARTH

ELECTRICAL

RANGE C6D

ALL OTHER

RANGES

DIM. A

172 (6. 77 )

77 ( 3.03)

FIX I NG CEN T RE S

208 (8 .18 )

151 (5. 94 )

FIG 11

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 AN ‘O’ RING SEAL FAILURE. THIS MUST NOT BE OBSTRUCTED DURING INSTALLATION. LEAVE AT LEAST 6 mm 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 BACK PLATE SO AS TO OBSTRUCT THE BLOW-OUT DISC.

OPERATING PRINCIPLES

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 pressure difference the force applied to the beam also falls, the beam is restored to its original position by the spring, and the switch or switches resets.

Switching Differential Adjustment: Model 303 (Fig 4)

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

2. Replace instrument lid (see maintenance).

Note: For accurate setting, a suitable pressure gauge should 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 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

S PD T NC = NO R M A LL Y C LO S E D CO M = C O M M O N NO = N O R M ALL Y O PE N

Fig 1

R EAR ( LO ) FR O N T (HI) S W IT C H S W IT C H

ADJUSTER KNOB

LOC KIN G S CR EW LOC KIN G P LATE

SCALE PLATE

INDIC ATOR

LOCKING SCREW

LOCKINGSCREW

SCALE PLATE

SCALE PLATE (LOW)

ADJUSTING

INDICATOR

LOCKING SCREW

2 x S P DT

FRONT TOP VIEW OF SWITCHING MECHANISM

INSTALLATION, OPERATING AND

MAINTENANCE INSTRUCTIONS FOR DIAPHRAGM ACTUATED SERIES 300 PRESSURE DIFFERENCE SWITCHES

(MODELS 301, 381, 303, 304, 384)

ISSUE H 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, K and M remove the lid using an appropriate tool if tight, eg edge of spanner or a metal rod (fig 5).

To remove lid on enclosures H, K, M rotate lid locking mechanism and where lid is tight use a flat bar (see below) or edge of a ring spanner to recommended size of bar suitable for opening instrument lid. Material needs to be hard chrome steel.

11 (0.4 3)

25 (1)

5.5 (0 .21)R

DIMENSIONS mm (inches) Fig 5

174 (6.85)

Fixing Crs

(0.27)

Fixing Crs

MODELS W, N 301, 303, 381

ADJUSTER KNOB LOCKING PLATE

SECONDARY ADJUSTER KNOB

SCALE PLATE SECONDARY INDICATOR

INDICATOR

Fig 4

350 (1 3.8) MIN

70 (2.75)

Fixing Crs

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 TRUS TED P ARTNE R I N P R O C E S S I N S T R U M E N T A T I O N

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

INSTALLATION

The instruments are designed to be mounted vertically. They can be mounted either direct to process or to a wall or panel using the back plate 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 switch.

Use a spanner to support the process connection when fitting the instrument. DO NOT OVER TIGHTEN. 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 mm2 (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 300 Pressure Difference 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. Exd IIC T6, or Code ‘M’ Cast Iron Exd I T6 for mining.

Zone 2 (UK only)

BS 4683: Part 3, Enclosure Code ‘N’. ExN IIT6. All enclosures are suitable for outdoor use and the majority

of products are 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.

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 Nm.

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 5490 IEC 529 EN 60529 IP RATING (Ingress Protection)

FIG 7

FOR A LL O T HER DIM EN SION S RE F ER TO FI G 6

154 (6.06) FIXING Crs.

195 (7.67)

252 (9.92)

(0.27)

RANGE C6D,

126 (4.96)

E1D, E8D

174 (6 .8 5 )

15 4 (6. 06 ) F IXI NG Crs

228 (8. 97 )

7 (0. 27 )

L P

FIXING CENTRES

(0.27)

omissions or amendments.

174 (6.85)

DIM. E

ALL OTHER RANGES

154 (6.06)

10 (0.39)

113 (4.44)

LID LOCK M4 SOCKET CAP SCREW (ROTATE)

M5 EARTH CONNECTION

14 (0.55)

PROCESS CONNECTION

FOR ALL OTHER DIMENSIONS REFER TO FIG 6

113 (4.44)

LID LO CK M 4 SO CK E T CA P SC REW (R OTA TE)

M5 E AR T H C ON NEC TION

ELEC TRI CA L EN TR Y

P RO CE SS

14 (0 .5 5)

C ON NE CTIO N

70 (2.75)

FIXING CENTRES

ELECTRICAL ENTRY

PROCESS CONNECTION

FOR ALL OTHER DIMENSIONS REFER TO FIG 6

FIG 9

FIXING

ENTRY

RES

156 (6.14)

CENTRES

DIM F

MODELS H, K, 304, 384

B OTTO M B RACK E T US ED ON RAN GE C6D O NLY

MO DE L S H, K, 3 01 , 3 03 , 3 81

SPACERS & BOTTOM BRACKET USED ON C6D RANGE ONLY

MODEL A 301, 303, 381

(1.53)

63 (2.48)

83 (3.3)

Registered Office Registered in England No 5369683

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.

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.

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 difference 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. Before commencing adjustments or removing the lid, isolate the instrument from process and power. For opening details see Figs 5 to

11.

Set Point Adjustment: Models 301, 303, 304 (Fig 2)

1. Loosen the M3 hexagon head locking screw.

2. 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.

3. Retighten the locking screw, taking care not to over tighten.

Replace the instrument lid (see maintenance).

Set Point Adjustment: Models 381, 384 (Fig 3)

The model 381 provides 2 microswitches, which can be set independently against individual scales using a special dual beam mechanism. This fulfils the need for HI LO switching. Adjust as follows:

1. Loosen the rear M3 hexagon head locking screw.

2. Rotate the rear adjuster screw to move the indicator

on the right hand (LO) calibrated scale. Rotate clockwise to increase the set point and counter clockwise to decrease the set point.

3. Retighten the locking screw.

4. Loosen the front hexagon locking screw.

5. Rotate the front adjuster screw to move the indicator

on the left hand (HI) calibrated scale. Rotate clockwise to increase the set point and counter clockwise to decrease the set point.

6. Tighten the locking screw.

Replace the instrument lid (see maintenance).

*208 (8.18)

217 (8.54)

202 (7. 95 )

*151 (5.94)

154 (6.06)

FIXING CENTRES

174 (6 .85 )

154 (6.0 6)

FIXING CENTRE S

113 (4.44) 55 (2. 16)

103 (4.05)

CENTRES

10 (0 .27)

DI M. B

FOR AL L OTH ER DIM ENS IONS REFER TO FI G 6

E1D, E8D

45 (1. 77)

70 (2.75)

FIXING CENTRES

M4 EARTH SCREW

ELECTRICAL ENTRY

PROCESS CONNECTION

ON ENCLOSURE N

70 (2.75 )

SCREW

ENTRY

PROCESS

DIM A

MODEL A 3 04, 3 84

Stock No: 002522/301

FIG 10

W, N 304, 384

WIRING

Pollution degree

TABLE A

– MICROSWITCH RATINGS

U L / C S A

IEC 947

-5-

1 / EN 60947

-5-

1 RATING

D e s i g n a t i o n

R A T I N G

5A @ 110 / 250 VAC

0.6/0.3A @

AC 14 / D300

432 72

0.8kV 250V

0.22/0.1A @

DC 13 / R300

DC 28 28

5A @ 110 / 250 VAC

0.6/0.3A @

AC 14 / D300

432 72

0.8kV 250V

2A @ 30 VDC

0.22/0.1A @

DC 13 / R300

DC 28 28

1A @ 125 VAC

1A @ 125 VAC RESISTIVE (IEC 1058

1/EN 61058

-1)

*5A @ 110/250VAC

0.6/0.3A @

AC 14 / D300

432 72

0.5kV 250V

5A @ 30 VDC

0.22/0.1A @

DC 13 / R300

DC 28 28

*1A @ 30 VAC

AC 14 / E150

216 36

0.5kV 125V 0.3A @ 120

& 30 VDC

VAC

0C 5A @ 110/250VAC

0.8kV 250V 0.6/0.3A @

AC 14 / D300

432 72

5A @ 110/250VAC

0.6/0.3A @

AC 14 / D300

432 72

0.8kV 250V

2A @ 30 VDC

0.22/0.1A @

DC 13 / R300

DC 28 28

5A @ 110/250VAC

0.6/0.3A @

AC 14 / D300

432 72

0.5kV 250V

2A @ 30 VDC

0.22/0.1A @

DC 13 / R300

DC 28 28

REDUCER

‘W’ CABLE GLAND ASSY

M4 SC REW

STRAP

M4 STUD

COIL W ASHER

LID

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 – 2004/08/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

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.

M I C R O S W I T C H

S W I T C H C O DE

00 & 01

02 & 03

& 05

*100mA @ 30 VDC

08 & 09

& 0H

( R E S I S T I V E )

* S E E N O T E

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

R A T I N G

( I e I U e )

Uimp

120/240 VAC

125/250 VDC

120/240 VAC

125/250 VDC

120/240 VAC

125/250 VDC

U t i l i s a t i o n

C a t e g o r y

Make

Break

120/240 VAC

125/250 VDC

& H3 & H6

120/240 VAC

125/250 VDC

The el ect r i c a l rating is dependent on th e mic r os w itc h fitted to the instrument. T h e el ectrical rati n g is defined by ea c h approval th at the micr os witc h c o m p l i e s with and i s s h o wn on the pr o d u c t nam eplate, ie UL / CSA, or IEC. It s hould be noted that the switch must be u s e d within t h e e l e c t rical r at i n g s p e c i fied fr om t h e approval you require. Table A l ists the actual IEC ratings against the Designation & Utilisation C at e g o r y m arked on t h e nameplate. In t he abs ence of a n y v e r i f i c at ion by U L / C S A t he micros witc h *m anufactur er’s r a t i n g is s p e c i f i e d i n bo l d i t a l i c s . If i n d oubt, seek guidance from fact o r y .

DIAG 1

ENCLOSURE WALL

DIAG 2

LOCKNUT

NYLON 22/20

DIAG 3

GLAND

FIBRE

SCREW

WASHER

DIAG 4.1

M4 NUT

M4 SINGL E

EARTH STRAP

FIBRE WASHER

ENCLOSURE

WALL

ELBOW ASSY

GASKE T

O RING SEAL

PROPRIETARY

GLAND

½" NPT Pg 13.5 M20 X 1.5 ¾ ET

M4 PLA IN WASHE R

EARTH

BASE

‘W’ ADAPTOR ASSY

EA RTH LABEL

SING LE COIL WASHER

NU T

PLAIN WAS H E RS

D IA G 5

M 20 x 1 . 5

NU T

STAR W AS HER

E N C L O S U R E

CABLE GLAND / CONDUIT ADAPTOR

DIAG 4

EN C LOSURE WALL (EXTE RIO R )

BO N D ED SEAL

EARTHING ASSY

F IB R E W A S H E R

A D A P T O R

‘A ’ A D A P T O R

SC R EW