Krom Schroder DL 5A, DL 5K, DL 5AT, DL 5KT, DL 10A Operating Instructions Manual

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Operating instructions

Pressure switches for air DL..A, DL..K

Cert. version 03.94

Translation from the German

Pressure switches for air DL..A, DL..K......

Contents ..............................

Safety.................................

Checking the usage .....................

Type code .............................2

Part designations ........................ 2

Type label.............................. 2

Installation ............................

Positive pressure measurement .............3

Negative pressure measurement . . . . . . . . . . . . 4

Differential pressure measurement ...........4

Wiring ................................4

Adjustment ............................5

Function check.........................5

Accessories ...........................5

Z-angle bracket .........................5

U-angle bracket .........................6

Standard coupler plug ....................6

Motor flange adapter . . . . . . . . . . . . . . . . . . . . . 6

Tube set ...............................6

Pilot lamp set, red or blue .................6

LED set, red/green....................... 7

External adjustment ......................7

Technical data .........................7

Designed lifetime ........................ 7

Logistics ..............................8

Certification ...........................8

Declaration of conformity ..................8

Contact ...............................8

Safety

Please read and keep in a safe place

Please read through these instructions carefully before installing or operating. Following the installation, pass the instructions on to the operator. This unit must be installed and commissioned in accordance with the regulations and standards in force. These instructions can also be found at www.docuthek.com.

Explanation of symbols

• ,  ,  , 3 ... = Action

▷ = Instruction

Liability

We will not be held liable for damage resulting from non-observance of the instructions and non-compliant use.

Safety instructions

Information that is relevant for safety is indicated in the instructions as follows:

DANGER

Indicates potentially fatal situations.

WARNING

Indicates possible danger to life and limb.

CAUTION

Indicates possible material damage.

All interventions may only be carried out by qualiﬁed gas technicians. Electrical interventions may only be carried out by qualiﬁed electricians.

Conversion, spare parts

All technical changes are prohibited. Only use OEM spare parts.

Changes to edition 0.6

The following chapters have been changed: – Accessories

GB-1

Checking the usage

DL ,5 – 3A, DL 3K, DL 5 – 50A, DL 5 – 50K

For monitoring positive, negative or differential air or ﬂue gas pressures.

This function is only guaranteed when used within

the speciﬁed limits– see page7 (Technical data). Any other use is considered as non-compliant.

Type code

Code Description

DL Pressure switch for air ,5 – 50 Max. setting in mbar K A

T T-product

-3

-4

-5

-6

-9 K T T N A External adjustment W Z-angle bracket

Part designations

 Upper housing section with cover

 Lower housing section 3 Hand wheel 4 M16 cable gland

Type label

With tube connection and hand wheel

Additionally with Rp¼connection

(optional: Rp

Electrical connection

via screw terminals

via screw terminals, IP 65

4-pin plug, without socket

4-pin plug, with socket

4-pin plug, with socket, IP 65

Red/green pilot LED for 24 V DC/AC

Blue pilot lamp for 230 V AC

Red/green pilot LED for 230 V AC

Blue pilot lamp for 120 V AC

D-49018 Osnabrück, Germany

CE – 0085AP0466

Installation

CAUTION

Please observe the following to ensure that the DL

is not damaged during installation and operation: – Use approved sealing material only. – Note the max. medium and ambient tempera-

tures, see page7 (Technical data).

– Condensation must not be allowed to get into

the housing (if possible, install pipework with an ascending gradient). Otherwise, there is a risk of icing of condensation at subzero temperatures,

/8)

the switching point shifting or corrosion in the device which can lead to malfunctions.

– Protect the connections against dirt or moisture

in the medium to be measured or the surrounding air. If necessary, install a ﬁlter.

– In case of highly ﬂuctuating pressures, install a

damping nozzle/restrictor oriﬁce.

– When installing outdoors, place the DL in a

roofed area and protect from direct sunlight (even IP65 version). To avoid condensation, the cover with pressure equalization element can be used on some types.

– In the case of an uneven mounting surface, se-

cure the pressure switch to the mounting plate or air duct with only two screws on the same side in order to avoid subjecting the pressure switch to mechanical stress.

– When using silicone tubes, only use silicone

tubes which have been sufﬁciently cured. Vapours containing silicone can adversely affect the functioning of electrical contacts.

– In the case of high humidity or aggressive gas

components, we recommend using a pressure switch with gold contact due to its higher resistance to corrosion. Closed-circuit current monitoring is recommended under difﬁcult operating conditions.

▷

The DL must not be in contact with masonry.

Minimum clearance 20mm.

▷ Ensure that there is sufﬁcient installation space. ▷ Ensure unobstructed view of the hand wheel. ▷

Installation in the vertical or horizontal position, or upside down, preferably with vertical diaphragm. If installed in a vertical position, the switching pointpS will correspond to the scale valueSK.

Max. inlet pressure = withstand pressure, mains voltage, ambient temperature, enclosure: see type label.

GB-2

▷

50 (1.97")

30 (1.18")

(0.79")

25 (0.98")

45 (1.77")

39 (1.53")

5,2

(0.2")

11,3 (0.44")

7 (0.27")

7,5 (0.3")

(0.4")

40 (1.6")

59 (2.3")

ø 5,5 (0.22") ø 6 (0.22")

ø 4,2 (0.17")

10 (0.39")

1 (0.04")

1 = Rp 1/4 (+),

2 = ø 4,75 x 1 mm (+) 3 = ø 4,75 x 1 mm (-)

(4 = Rp

/8 (-),

/8" NPT (-))

(4)

(1/4" NPT (+))

1 = Rp 1/4 (+),

2 = ø 4,75 x 1 mm (+) 3 = ø 4,75 x 1 mm (-)

(4 = Rp

/8 (-),

/8" NPT (-))

1 = Rp

/4 (+),

2 = ø 4,75 x 1 mm (+) 3 = ø 4,75 x 1 mm (-)

(4 = Rp

/8 (-),

/8" NPT (-))

(4)

Test

3(4)

(1/4" NPT (+))

(

/4" NPT (+))

1 = Rp 1/4 (+),

2 = ø 4,75 x 1 mm (+) 3 = ø 4,75 x 1 mm (-)

(4 = Rp

/8 (-),

/8" NPT (-))

1 = Rp

/4 (+),

2 = ø 4,75 x 1 mm (+) 3 = ø 4,75 x 1 mm (-)

(4 = Rp

/8 (-),

/8" NPT (-))

2 = ø 4,75 x 1 mm (+) 3 = ø 4,75 x 1 mm (-)

(4)

Test

3(4)

(1/4" NPT (+))

(

/4" NPT (+))

If installed in another position, the switching pointpS will change and no longer correspond to the set scale valueSK. Switching pointpS must be checked.

SK + 0.18 mbar

[+ 0.071 "WC]

SK - 0.18 mbar

[- 0.071 "WC]

DL 1,5A

DL 3K, DL 3A DL 5 – 150A, DL 5 – 150K

▷ Installation using self-tapping screws for 1mm-

thick sheets:

DL..A, DL 3K: Ø 3.5 x 8 mm or Ø 4 x 8 mm.

DL 5 – 150K: Ø3.5 x 16 mm.

 Fit the DL.

DL 1,5A DL 3A DL 3K

e.g. SK = -0.5:

ps = -0.5 + 0.18

ps = -0.32 mbar

49,5 (1.9")

44,5 (1.7")

DL..A: Rp ¼ (DL..AT: ¼" NPT)

ø 6,1 (ø 0.24")

 Connect the pressure line.

▷

DL..A: upon delivery, port 2 is closed off by a rubber cap.

DL ,5A, DL 3A

1 = Rp 1/4 (+),

(4)

(1/4" NPT (+)) 2 = ø 4,75 x 1 mm (+) 3 = ø 4,75 x 1 mm (-)

(4 = Rp

/8 (-),

/8" NPT (-))

▷ Positive pressure: port 1 or 2 ▷ Negative pressure: port 3 ▷ Special version DL 3A – 3Z: port 4

DL 5 – 50A

Test

3(4)

/4 (+),

1 = Rp

/4" NPT (+))

( 2 = ø 4,75 x 1 mm (+) 3 = ø 4,75 x 1 mm (-)

(4 = Rp

/8 (-),

/8" NPT (-))

▷ Positive pressure: port 1 or 2 ▷

Negative pressure: port 3; after unscrewing port3 also port4

DL 3K

3,5 (0.14")

DL 5–150A

2,7 (0.11")

3,5 (0.14")

DL 5–150K

64 (2.5")

49,5 (1.9")

54,5 (2.1")

2,7 (0.11")

DL..A: Rp ¼ (DL..AT: ¼" NPT)

44,5 (1.7")

2,7 (0.11")

45 (1.8")

2 = ø 4,75 x 1 mm (+)

▷ Positive pressure: port 2 ▷ Negative pressure: port 3

DL 5 – 50K

▷ Positive pressure: port 2

(5)

3 = ø 4,75 x 1 mm (-)

2 = ø 4,75 x 1 mm (+)

3 = ø 4,75 x 1 mm (-)

(5 = ø 4,75 x 1 mm (+))

▷ Negative pressure: port 3 ▷ Optional test point for positive pressure: port5

Positive pressure measurement

▷ 1 or 2 = positive pressure port(+). ▷ If port2 is used, close off port1.

3 or 4 = remains open to ventilate the upper

▷

diaphragm chamber.

GB-3

Negative pressure measurement

▷ 3 or 4 = negative pressure port(-). ▷

1 or 2 = remains open to ventilate the upper

diaphragm chamber.

Differential pressure measurement

 Disconnect the system from the electrical power

supply.

3 42

6 75

▷ 1 or 2 = port for the higher positive pressure or

lower negative pressure(+).

▷ 3 or 4 = port for the lower positive pressure or

higher negative pressure(-).

3 Seal the ports that are not in use.

Wiring

▷

If the DL..G (DL..TG) has switched a voltage

>24V (>30V) and a current >0.1A at cosφ=1

or >0.05A at cosφ=0.6 once, the gold plating on the contacts will have been burnt through. It can then only be operated at this power rating or higher power rating.

CAUTION

To ensure that the DL is not damaged during opera-

tion, note the switching capacity, see page7 (Technical data).

▷ In the case of low switching capacities, such as

24V, 8mA, for example, we recommend using an RCmodule (22 Ω, 1μF) in air containing silicone or oil.

C = 1 µF R = 22 Ω

COM 3

M16 x 1,5:

ø 4–10 mm

▷

Contacts 3 and  close when subject to increasing pressure. Contacts  and 3 close when subject to falling pressure. With the NO contact, the NC contact is omitted.

COM

DL ,5A

▷

The connection depends on the positive or nega-

tive adjusting range.

–

DL 1,5A

▷

Negative adjusting range 0 to -0.5 mbar: con-

tacts 3 and 1 close when subject to increasing negative pressure. Contacts 2 and 3 close when subject to falling negative pressure.

COM

GB-4

Adjustment

COM

▷

The switching point is adjustable via hand wheel.

 Disconnect the system from the electrical power

supply.

 Detach the housing cover, see page7 (Tech-

nical data).

3 Connect an ohmmeter.

COM

4 Set the switching point using the hand wheel. 5 Connect a pressure gauge.

▷

Deviation from the switching point during testing pursuant to EN1854:

Air pressure switches:

DL 5 – 150A, DL 5 – 150K DL 1,5A

DL 3A, DL 3K

▷

If the DL does not trip at the desired switch-

Deviation

± 15%

± 15% or ± 6 Pa ± 15% or ± 6 Pa

ing point, correct the adjusting range using the hand wheel. Relieve the pressure and repeat the process.

Function check

▷ We recommend a function check once a year. ▷ Press the test key during operation– the pres-

sure switch switches.

1 cm = 1 mbar

TEST

6 Apply pressure. In doing so, monitor the switch-

ing point on the ohmmeter and the pressure gauge.

▷ Max. inlet pressure = withstand pressure

Max.

inlet

pressure

mbar

Switching

differential**

mbar

Type

Adjusting

range*

mbar

min. max. min. max.

DL 1,5A -0.5 1.5 50 0.1 0.16

▷ In case of differential pressure, press both keys

simultaneously.

TEST

–

DL 3A, ..3K 0.2 3 50 0.1 0.16 DL 3AT, ..3KT 0.3 3 150 0.1 0.16 DL 5A, ..5K 0.4 6 300 0.2 0.3 DL 5AT, ..5KT 0.5 5 300 0.2 0.3 DL 10A, ..10K,

..10AT, ..10KT

1 10 300 0.25 0.4

DL 30A, ..30K 2.5 30 300 0.35 0.9 DL 50A, ..50K,

..50AT, ..50KT

DL 150A,

..150K

Type

2.5 50 300 0.8 1.5

30 150 300 3 5

Adjusting

range*

"WC

min. max. min. max.

Max.

inlet

pressure

"WC

Switching

differential**

"WC

DL 3AT, ..3KT 0.12 1.2 58.5 0.04 0.06 DL 5AT, ..5KT 0.2 2 117 0.08 0.12 DL 10AT,

..10KT

DL 50AT,

..50KT

* Adjusting tolerance ±15% of the scale value, but

min. ±4Pa

0.4 4 117 0.1 0.16

1 20 117 0.3 0.6

Accessories

Z-angle bracket

DL 5 – 150K: Order No.: 74916158 DL 3 – 150A, DL 3K: Order No.: 74913661

7,5 (0.3")

1 (0.04") 10 (0.39")

40 (1.6")

59 (2.3")

ø 4,2 (0.17") ø 5,5 (0.22") ø 6 (0.22")

7 (0.27")

11,3 (0.44")

** Mean switching differential at min. and max. setting

GB-5

U-angle bracket

47,5 (1.87"

DL 1,5 – 150A, DL 3 – 150K: Order No.: 74916185

Tube set

To be used with air only.

75 (2.95")

(0.79")

50 (1.97")

30 (1.18")

(0.79")

45 (1.77")

25 (0.98")

6 (0.24")

24 (0.94")

-0,3

64 (2.52")

Standard coupler plug

M4 x 12

(0.63")

(1.69")

)

40 (1.57")

M4 x 10

5,2

(0.2")

+0,1

(0.17")

4,20

(0.4")

39 (1.53")

Order No.: 74912952

Order No.: 74919272

Pilot lamp set, red or blue

DL..T, DL..N

Pilot lamp, red:

110/120 V AC, I = 1.2 mA, Order No.: 74920430;

220/250 V AC, I = 0.6 mA, Order No.: 74920429. Pilot lamp, blue:

110/120 V AC, I = 1.2 mA, Order No.: 74916121;

220/250 V AC, I = 0.6 mA, Order No.: 74916122.

2 31

COM

Order No.: 74916159

Motor ﬂange adapter

Set including retaining screws

DL..A, DL 3 – 5K: Order No.: 74916157, DL 5 – 150K: Order No.: 74916156.

GB-6

COM

LED set, red/green

DL..K2, DL..T2

24 V DC, I = 16 mA; 24 V AC, I = 8 mA, Order No.: 74921089; 230 V AC, I = 0.6 mA, Order No.: 74923275.

2 31

3 COM

1 NC

–

COM

External adjustment

In order to set the switching pressure from the outside, the cover for external adjustment (6mm Allen key) for DL..A, DL5 – 150K can be retroﬁtted.

Order No.: 74916155

2 31

Technical data

Gas type: air or ﬂue gas, no ﬂammable gases, no aggressive gases. Max. inlet pressure = withstand pressure: see type label or page 5 (Adjustment). Micro switch to EN 61058-1. Switching capacity: DL..: 24 V (min. 0.05 A) to 250 V AC (max. 5 A, at cos φ 0.6 = 1 A), max. 6 A, temporarily (<1 s) 20A. DL..G: 5 V (min. 0.01 A) to 250 V AC (max. 5 A, at cos φ 0.6 = 1 A), 5 V (min. 0.01 A) to 48 V DC (max.1A), DL..T: 30 – 240 V AC, 50/60 Hz, 5 A resistive or

0.5 A inductive (cos φ= 0.6), DL..TG: < 30 V AC/DC,

0.1 A resistive or

0.05 A inductive (cos φ= 0.6). Contact gap < 3 mm (μ). Safety class II to VDE 0106-1. Max. medium and ambient temperatures: DL: -20 to +80°C (-4 to +176°F), DL..T: -40 to +60°C (-40 to +140°F). Long-term use in the upper ambient temperature range accelerates the ageing of the elastomer materials and reduces the service life (please contact manufacturer). Storage temperature:

-20 to +40°C (-4 to +104°F). Diaphragm pressure switch, NBR, silicone-free. Housing: glass ﬁbre reinforced PBT plastic with low gas release. Enclosure to IEC 60529: IP54, IP65. Line entrance: M16 x 1.5 (1/2" NPT conduit), clamping range: diameters of 4 to 10mm.

Type of connection: screw terminals.

Weight: DL..A: 190g (6.7oz), DL..K: 220 g (7.8oz).

Designed lifetime

This information on the designed lifetime is based on

using the product in accordance with these operating instructions. Once the designed lifetime has been reached, safety-relevant products must be replaced. Designed lifetime (based on date of manufacture) in accordance with EN13611, EN1854 for pressure switches: 10 years.

You can ﬁnd further explanations in the applicable

rules and regulations and on the afecor website (www.afecor.org).

This procedure applies to heating systems. For

thermoprocessing equipment, observe local regulations.

GB-7

Logistics

Transport

Protect the unit from external forces (blows, shocks, vibration). On receipt of the product, check that the delivery is complete, see page2 (Part designations). Report any transport damage immediately.

Storage

Store the product in a dry and clean place. Storage temperature: see page7 (Technical data). Storage time: 6months before using for the ﬁrst time. If stored for longer than this, the overall service life will be reduced by the corresponding amount of extra storage time.

Packaging

The packaging material is to be disposed of in ac-

cordance with local regulations.

Disposal

Components are to be disposed of separately in accordance with local regulations.

Certiﬁcation

Declaration of conformity

We, the manufacturer, hereby declare that the product DL, marked with product ID No. CE-0085AP0466, complies with the requirements of the listed Directives.

Directives: – 2009/142/EC – 2006/95/EC

The relevant product corresponds to the type tested

by the notiﬁed body 0085.

The production is subject to the surveillance proce-

dure pursuant to Directive 2009/142/EC AnnexII

paragraph3 and pursuant to DIN EN ISO 9001:2008.

Elster GmbH

FM approval

Factory Mutual Research Class: 3510 Flow and pressure safety switches. Designed for applications pursuant to NFPA 85 and NFPA 86.

UL approval

UL 353 Limit control

AGA approval

Australian Gas Association, Approval No.: 5484

AGA

Eurasian Customs Union

The product DL meets the technical speciﬁcations

of the Eurasian Customs Union.

RoHS compliant

Scan of the Declaration of conformity (D, GB) – see

www.docuthek.com

Contact

Elster GmbH

If you have any technical questions, please contact

your local branch ofﬁce/agent. The addresses are

available on the Internet or from ElsterGmbH.

We reserve the right to make technical modiﬁcations

Elster GmbH

Postfach 28 09, D-49018 Osnabrück

Strotheweg 1, D-49504 Lotte (Büren)

T +49 541 1214-0

F +49 541 1214-370

in the interests of progress. info@kromschroeder.com, www.kromschroeder.com

GB-8

Krom Schroder DL 5A, DL 5K, DL 5AT, DL 5KT, DL 10A Operating Instructions Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Pressure switches for air DL..A, DL..K

Contents

Contents

Safety

Safety

Checking the usage

Type code

Part designations

Type label

Installation

Positive pressure measurement

Negative pressure measurement

Differential pressure measurement

Wiring

Adjustment

Function check

Accessories

Z-angle bracket

U-angle bracket

Tube set

Standard coupler plug

Pilot lamp set, red or blue

LED set, red/green

External adjustment

Technical data

Designed lifetime

Logistics

Declaration of conformity

Contact

Contact