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

F

NL

I

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344550

D GB F NL I E

TR CZ PL RUS H

DK S N P GR

➔ www.docuthek.com

Operating instructions

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

© 2016 Elster GmbH · Edition 07.16

Cert. version 03.94

Translation from the German

Contents

Contents

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

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

GB-1

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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

GB

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

22

3

4

1

D-49018 Osnabrück, Germany

DL

CE – 0085AP0466

2

3

1

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,

1

/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

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▷

50 (1.97")

30 (1.18")

20

(0.79")

25 (0.98")

45 (1.77")

16

39 (1.53")

5,2

(0.2")

11,3 (0.44")

7 (0.27")

7,5 (0.3")

10

(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

1

/8 (-),

1

/8" NPT (-))

1

(4)

2

3

(1/4" NPT (+))

1 = Rp 1/4 (+),

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

(4 = Rp

1

/8 (-),

1

/8" NPT (-))

1 = Rp

1

/4 (+),

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

(4 = Rp

1

/8 (-),

1

/8" NPT (-))

1

(4)

2

3

1

Test

2

3(4)

(1/4" NPT (+))

(

1

/4" NPT (+))

1 = Rp 1/4 (+),

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

(4 = Rp

1

/8 (-),

1

/8" NPT (-))

1 = Rp

1

/4 (+),

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

(4 = Rp

1

/8 (-),

1

/8" NPT (-))

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

1

(4)

2

3

1

2

3

Test

2

3(4)

(1/4" NPT (+))

(

1

/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 (+),

2

3

1

(4)

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

1

(4 = Rp

/8 (-),

1

/8" NPT (-))

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

DL 5 – 50A

Test

2

1

3(4)

1

/4 (+),

1 = Rp

1

/4" NPT (+))

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

1

(4 = Rp

/8 (-),

1

/8" NPT (-))

▷ Positive pressure: port 1 or 2
▷

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

DL 3K

GB

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

2

2

(5)

3 = ø 4,75 x 1 mm (-)

3

2 = ø 4,75 x 1 mm (+)

3

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

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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

GB

▷ 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

NO

NC

2

1

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.

NO

L1

3

COM

2

NC

1

NO

1

2

NC

DL ,5A

▷

The connection depends on the positive or nega-

tive adjusting range.

-

0

,

5

-

0

r

,

a

2

b

5

m

5

,

1

0

–

,

0

5

,

0

-

DL 1,5A

▷

Negative adjusting range 0 to -0.5 mbar: con-

0

,

2

5

0

,

5

5

,

1

1

m

b

a

r

5

=

2

,

1

0

1

0

P

a

0

,

1

5

7

,

0

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

NO

NC

2

1

µ

COM

3

3

COM

GB-4

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Adjustment

NO

2

NC

1

COM

3

COM

3

NC

1

NO

2

▷

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.

NO

1

2

NC

3

COM

NO

COM

2

NC

3

1

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

0

▷

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.

GB

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

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

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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")

20

(0.79")

GB

50 (1.97")

30 (1.18")

(0.79")

45 (1.77")

25 (0.98")

6 (0.24")

24 (0.94")

43

-0,3

64 (2.52")

Standard coupler plug

M4 x 12

20

16

(0.63")

(1.69")

)

40 (1.57")

M4 x 10

5,2

(0.2")

+0,1

(0.17")

4,20

10

(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

4

N

3

COM

NO

L1

2

NC

1

NO

2

NC

NO

1

3

COM

N

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

NO

NC

L1

3

COM

2

1

NC

N

NO

1

2

NC

3

COM

N

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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

4

NO

2

+

3 COM

1 NC

1

2

NC

NO

–

3

COM

N

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).

GB

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

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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.

GB

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

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

Elster GmbH

Postfach 28 09, D-49018 Osnabrück

Postfach 28 09, D-49018 Osnabrück

Postfach 28 09, D-49018 Osnabrück

Strotheweg 1, D-49504 Lotte (Büren)

Strotheweg 1, D-49504 Lotte (Büren)

Strotheweg 1, D-49504 Lotte (Büren)

T [phone]

T [phone]

T [phone]

F [phone]

F [phone]

F [phone]

in the interests of progress. [e-mail], www.kromschroeder.com

GB-8