Krom Schroder DL H Series User manual

DK S N P GR
➔www.docuthek.com
D GB F NL I E
TR CZ PL RUS H
Cert. version 05.15
© 2016 Elster GmbH · Edition 05.16
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 opera-
tor. 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
• , 1 ,  ,  ... = Action
▷= Instruction
Liability
We will not be held liable for damage resulting from
non-observance of the instructions and non-com-
pliant 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.
Contents
Operating instructions
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GB-1
05144
Translation from the German
Pressure switches for air
DL..H, DL..N
Pressure switches for air DL..H, DL..N .....1
Contents ..............................1
Safety.................................1
Checking the usage .....................
Type code .............................2
Part designations ........................2
Type label..............................2
Installation ............................
Positive pressure measurement .............3
Negative pressure measurement . . . . . . . . . . . . 3
Differential pressure measurement ...........3
Wiring ................................
Adjustment ............................4
Function check.........................4
Accessories ...........................4
Technical data .........................6
Logistics ..............................6
Certification ...........................6
Declaration of conformity ..................6
Contact ...............................6
Safety
Contents

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Checking the usage
DL..H, DL..N
For monitoring increasing and decreasing air or flue
gas pressure.
DL..H switches and locks off with rising pressure,
DL..N switches and locks off with falling pressure.
They can be unlocked using the manual reset.
This function is only guaranteed when used within
the specified limits– see page6 (Technical data).
Any other use is considered as non-compliant.
Type code
Code Description
DL Air pressure switch
10 – 150 Max. setting in mbar
A
K
Rp ¼, tube connection and hand wheel
Tube connection and hand wheel
H
N
Locks off with rising pressure
Locks off with falling pressure
GWith gold-plated contacts
-
-4
-5
-6
-9
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
K
T
T
N
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
AExternal adjustment
Part designations
Test
1
2
3
5
4
1Upper housing section with cover
Lower housing section
Hand wheel
4M16 cable gland
5DL..H, DL..N with manual reset
Type label
DL
CE – 0085AP0466
2
13
D-49018 Osnabrück, Germany
Max. inlet pressure pmax. = withstand pressure, mains
voltage, ambient temperature, enclosure: see type
label.
Installation
CAUTION
Please observe the following to ensure that the DL
is not damaged during installation and operation:
– Check max. ambient temperature – see
page6 (Technical data).
– When using silicone tubes, only use silicone
tubes which have been sufficiently cured.
– Vapours containing silicone must not be allowed
to get into the housing.
– Condensation must not be allowed to get into
the housing. At subzero temperatures, malfunc-
tions/failures due to icing can occur.
– The service life will be shorter if subject to ozone
concentrations exceeding 200μg/m3. When
installing outdoors, place the DL in a roofed
area and protect from direct sunlight (even IP65
version).
– Avoid subjecting the DL to strong or violent
vibrations.
– In case of highly fluctuating pressures, install
a restrictor orifice, see page 4 (Restrictor
orifice for DL..A).
▷Ensure that there is sufficient installation space.
▷Ensure unobstructed view of the hand wheel.
▷Installation position as required, preferably with
vertical diaphragm. Then the switching point pS
corresponds to the scale value SK set on the
hand wheel. In other installation positions, the
switching pointpSwill change and no longer
correspond to the scale valueSK set on the
hand wheel. Check the switching point.
pS= SK pS= SK + 0.18 mbar pS= SK - 0.18 mbar

GB-3
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Connection facilities
▷Installation using self-tapping screws for 1mm-
thick sheets:
DL..AH, DL..AN: Ø3.5x8mm or Ø4x8mm.
DL..KH, DL..KN: Ø3.5 x16 mm.
1 Fit the DL.
64 (2.5") 45 (1.8")
54,5 (2.1") 2,7 (0.11")
Rp ¼
DL..AH,
DL..AN
DL..KH,
DL..KN
2,7
(0.11")
3,5
(0.14")
49,5 (1.9")
44,5 (1.7")
M16 x 1,5 28,5 (1.1")
M16 x 1,5 28,5 (1.1")
ø 6,1 (ø 0.24")
 Connect the pressure line.
▷ DL..A: upon delivery, port 2 is closed off by a
rubber cap.
DL..A
1 = Rp 1/4 (+)
2 = ø 4,75 x 1 mm (+)
3 = ø 4,75 x 1 mm (-)
(4 = Rp 1/8 (-))
2 = ø 4,75 x 1 mm (+)
3 = ø 4,75 x 1 mm (-)
(4 = Rp 1/8 (-))
(5 = ø 4,75 x 1 mm (+))
DL 5–150A
1
(5)
DL 5–150K
2
3(4)
3(4)
2
Test
▷Positive pressure, port 1 or 2
▷ Negative pressure, port 3; after unscrewing
port3 also port4
DL..K
1 = Rp 1/4 (+)
2 = ø 4,75 x 1 mm (+)
3 = ø 4,75 x 1 mm (-)
(4 = Rp 1/8 (-))
2 = ø 4,75 x 1 mm (+)
3 = ø 4,75 x 1 mm (-)
(4 = Rp 1/8 (-))
(5 = ø 4,75 x 1 mm (+))
DL 5–150A
1
(5)
DL 5–150K
2
3(4)
3(4)
2
Test
▷Positive pressure, port 2
▷ Negative pressure, port 3; after unscrewing
port3 also port4
▷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.
Negative pressure measurement
▷3 or 4 = negative pressure port(-).
▷ 1 or 2 = remains open to ventilate the upper
diaphragm chamber.
Differential pressure measurement
▷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(-).
 Seal the ports that are not in use.
Wiring
▷If the DL..G has switched a voltage >24V and
a current >0.1A 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.
▷Pressure switch DL can be used in Zone1(21)
and2(22) hazardous areas if an isolating am-
plifier is installed upstream in the safe area as
“Ex-i” equipment pursuant to EN 60079-11
(VDE0170-7):2007.
▷ DL as “simple electrical equipment” pursuant to
EN60079-11:2007 corresponds to the Tempera-
ture classT6, GroupII. The internal inductance/
capacitance is Lo= 0.2μH/Co= 8pF.
CAUTION
To ensure that the DL is not damaged during opera-
tion, note the switching capacity, see page6
(Technical data).

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▷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.
NO
C = 1 µF R = 22 Ω
2
NC
1
COM
3
1 Disconnect the system from the electrical power
supply.
M16 x 1,5:
ø 4–10 mm
3 42
5 6 7
▷ Contacts and close when subject to increas-
ing pressure. Contacts 1and close when sub-
ject to falling pressure.
COM
3
NC
1
NO
2
NO
2
NC
1
COM
3
L1
Adjustment
▷ The switching point is adjustable via hand wheel.
1 Disconnect the system from the electrical power
supply.
 Detach the housing cover, see page6 (Tech-
nical data).
 Connect an ohmmeter.
NO
2
NC
1
COM
3
COM
3
NC
1
NO
2
0
1 cm = 1 mbar
4 Set the switching point using the hand wheel.
5 Connect a pressure gauge.
NO
2
NC
1
COM
3
COM
3
NC
1
NO
2
0
1 cm = 1 mbar
6 Apply pressure. In doing so, monitor the switch-
ing point on the ohmmeter and the pressure
gauge.
▷ Max. inlet pressure p
max.
= 300 mbar = with-
stand pressure.
Type Adjusting range*
[mbar]
Reset pressure**
[mbar]
DL 10..H, ..N 1 – 10 0.4 – 1
DL 50..H, ..N 2.5 – 50 1 – 2
DL 150..H, ..N 30 – 150 2 – 5
* Adjusting tolerance = ±15% of the scale value.
** Difference between switching pressure and pos-
sible reset.
*** Mean switching differential at min. and max. setting
▷ Deviation from the switching point during testing
pursuant to EN1854: air pressure switch: ± 15%.
▷ If the DL does not trip at the desired switch-
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.
DL..A
▷Press the test key during operation– the pres-
sure switch switches.
TEST +
▷In case of differential pressure, press both keys
simultaneously.
TEST
TEST –
+
Accessories
Restrictor orifice for DL..A
In the case of high pressure fluctuations, we recommend
using a restrictor orifice (contains non-ferrous metals).
R
¼
Rp
¼
Hole diameter Ø 0.2 mm, Order No.: 75456321.
Hole diameter Ø 0.3 mm, Order No.: 75441317.

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Z-angle bracket
DL..K: Order No.: 74916158
DL..A: Order No.: 74913661
49,5 (1.9")
44,5 (1.7")
2,7
(0.11")
3,5
(0.14")
ø 6,1 (ø 0.24")
50 (1.97")
30 (1.18")
20
(0.79")
25 (0.98")
45 (1.77")
24 (0.94")
43 -0,3 (1.69")
64 (2.52")
6 (0.24")
16
(0.63")
39 (1.53")
4,20 +0,1
(0.17")
5,2
(0.2")
11,3 (0.44")
7 (0.27")
7,5 (0.3")
10
(0.4")
DL..A: Rp ¼
(DL..AT: ¼" NPT)
DL..A: Rp ¼
(DL..AT: ¼" NPT)
DL 1,5A
DL 3A
DL 3K
DL 5–150A
DL 5–150K
2,7
(0.11")
3,5
(0.14")
64 (2.5")
54,5 (2.1") 2,7
(0.11")
45 (1.8")
49,5 (1.9")
44,5 (1.7")
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")
Fastening set with screws, U-shape bracket
M4 x 10
M4 x 12
50 (1.97")
47,5 (1.87"
)
75 (2.95")
30 (1.18")
20
(0.79")
25 (0.98")
45 (1.77")
20
(0.79")
24 (0.94")
43 -0,3 (1.69")
64 (2.52")
40 (1.57")
6 (0.24")
16
(0.63")
39 (1.53")
4,20 +0,1
(0.17")
5,2
(0.2") 10
(0.4")
Order No.: 74915387
Standard coupler plug
Order No.: 74916159
Pilot lamp set, red or blue
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
NC
1
COM
3
NO
NO 2
N
NO
2
NC
1
COM
3
L1
N
NC
1
COM
3
NO
NC
2
N
NO
2NC
1
COM
3
L1
N
LED set, red/green
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
NC
1
COM
3
NO
2
N
NO
21 NC
3 COM
+
–

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Contact
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
in the interests of progress.
Elster GmbH
Strotheweg 1, D-49504 Lotte (Büren)
Tel. [phone]
Fax [phone]
[e-mail], www.kromschroeder.com
Tube set
Order No.: 74919272
Technical data
Gas type: air or flue gas, no flammable gases, no
aggressive gases.
Max. inlet pressure pmax. = withstand pressure:
300mbar.
Switching capacity:
UI (cos φ = 1) I (cos φ = 0.6)
DL 24 – 250 V AC 0.05 – 5 A 0.05 – 1 A
DL..G 5 – 250 V AC 0.01 – 5 A 0.01 – 1 A
5 – 48 V DC 0.01 – 1 A
Maximum medium and ambient temperatures:
-15 to +60°C.
Storage and transport temperature:
-20 to +40°C.
RoHS compliant pursuant to 2002/95/EC.
Diaphragm pressure switch, silicone-free.
Diaphragm: NBR.
Housing: glass fibre reinforced PBT plastic with
low gas release.
Enclosure to IEC 60529: IP54, IP65.
Safety class II to VDE 0106-1.
Cable diameter: 0.5 to 1.8 mm
(AWG24 to AWG13).
Line entrance: M16x1.5, clamping range: diam-
eters of 4 to 10mm.
Type of connection: screw terminals, max. torque:
250Ncm.
Weight: DL..A: 200 g (7.1oz), DL..K: 190 g
(6.7oz).
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 designa-
tions). Report any transport damage immediately.
Storage
Store the product in a dry and clean place.
Storage temperature: see page6 (Technical data).
Storage time: 6months in the original packaging
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.
Elster GmbH
Scan of the Declaration of conformity (D,GB)– see
www.docuthek.com
RoHS compliant
Contact