Kromschroeder DL 2E User manual

CONTENTS
Cert. Version 05.18 · Edition 03.22 · EN · 03250191
DE, EN, FR, NL, IT, ES, DA, SV, NO, PT, EL, TR, CS, PL, RU, HU – www.docuthek.com
Pressure switches for air DL2E, DL4E, DL14E, DL35E
1 Safety ................................1
2 Checking the usage .....................2
3 Installation ............................2
4 Wiring................................3
5 Adjustment............................4
6 Function check.........................4
7 Accessories ...........................4
8 Technical data .........................5
9 Designed lifetime .......................6
10 Certification ..........................6
11 Logistics .............................7
12 Disposal .............................7
1 SAFETY
1.1 Please read and keep in a safe place
Please read through these instructions care-
fully before installing or operating. Following the installa-
tion, 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.
1.2 Explanation of symbols
1, 2, 3, a, b, c = Action
➔= Instruction
1.3 Liability
We will not be held liable for damage resulting from
non-observance of the instructions and non-com-
pliant use.
1.4 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.
1.5 Conversion, spare parts
All technical changes are prohibited. Only use OEM
spare parts.
OPERATING INSTRUCTIONS

DL2-35E · Edition 03.22
EN-2
2 CHECKING THE USAGE
DL2-35E
For monitoring positive, negative or differential pres-
sures of air, flue gas or other non-aggressive gases.
This function is only guaranteed when used within the
specified limits– see page 5 (8 Technical data). Any
other use is considered as non-compliant.
2.1 Type code DL2–35E
DL Pressure switch for air
2Adjusting range 20-200Pa
4Adjusting range 50-400Pa
14 Adjusting range 300–1400Pa
35 Adjusting range 300–1400Pa
EWith tube connection, adjusting screw
HTemperature range -40 – +110°C
(-40 – +230°F)
GWith gold contacts
-1 AMP plug connection
WZ-angle bracket
DL2: Switching point 20–30Pa when installed upside
down.
Adjusting range: DL..2EH: 45–200Pa, DL..4EH:
70–400Pa.
2.2 Type code DL2–35ET
DL Pressure switch for air
2Adjusting range 0.12–0.8 “WC (20–
200Pa)
4Adjusting range 0.2–1.6 “WC (50–
400Pa)
14 Adjusting range 1.2–5.6 “WC (300–
1400Pa)
35 Adjusting range 4.8–14 “WC (1200–
3500Pa)
EWith tube connection, adjusting screw
TT-product
GWith gold contacts for voltages 12–250V
-1 AMP plug connection (UR recognized)

DL2: Switching point 0,08–0,12 “WC when installed
upside down.
2.3 Part designations
2
1
3
1 Cover
2 Housing
3 Adjusting screw
2.4 Type label
➔ Max. inlet pressure p
max.
= withstand pressure,
mains voltage, switching pressure, ambient tem-
perature, enclosure: see type label.
➔ Installation position: see switching pressure (Pa)
on type label.
3 INSTALLATION
CAUTION
Please observe the following to ensure that the
unit is not damaged during installation:
– Dropping the device can cause permanent
damage. In this event, replace the entire device
and associated modules before use.
– Note the max. medium and ambient tempera-
tures, see page 5 (8 Technical data).
Otherwise, there is a risk of icing of condensa-
tion at subzero temperatures, the switching
point shifting or corrosion in the device which
can lead to malfunctions.
– Condensation must not be allowed to get into
the housing.
– Protect the connections against dirt or moisture
in the medium to be measured or the surround-
ing air. If necessary, install a filter.
– Avoid strong impact on the unit.
– In case of highly fluctuating pressures, install a
damping nozzle.
– In the case of an uneven mounting surface,
secure 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.
– Vapours containing silicone can adversely affect
the functioning of electrical contacts. When
using silicone tubes, only use silicone tubes
which have been sufficiently cured.
– In the case of high humidity, we recommend
using a pressure switch with gold contact due
to its higher resistance to corrosion. Closed-cir-
cuit current monitoring is recommended under
difficult operating conditions.
➔ Installation position as required; adjustment as
indicated on the type label. If installed in another
position, the switching pointpSwill change.

DL2-35E · Edition 03.22
EN-3
ps= SK SK + 13 Pa
[+ 0,052 "WC]
SK - 13 Pa
[- 0,052 "WC]
DL 2 – 35E
1 Install the DL2-35E using screws, a securing clip
or an angle bracket.
Securing with screws
a
66 mm
(2.6")
ø4,4 mm
(0.17")
b
Securing clip S/D
a b
Z-angle/L-angle bracket
a b
2 Connect the flexible tube. 6mm (0.236") connec-
tion diameter.
➔
Max. inlet pressure or differential pressure, see page
4 (5.1 Adjusting range DL2-35E).
Positive pressure
Negative pressure
Differential pressure
4 WIRING
➔ If the pressure switch 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2-35E is not damaged
during operation, note the switching capacity,
see page 5 (8 Technical data).
In the case of low switching capacities, such as 24V,
8mA, for example, we recommend using an RCmod-
ule (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.
➔Use AMP plugs for wiring.
2 3 4
➔ The cable must be guided under the strain relief
facility.
5 6
7 Wire as shown on the connection diagram.
➔ Contacts 3and 2close when subject to increasing
pressure. Contacts 1and 3close when subject
to falling pressure. With the NO contact, the NC
contact is omitted.
NO
2NC
1
COM
3
L1
COM
3
NC
1
NO
2
8 Reinstall the housing cover after wiring (see page
5 (8 Technical data) for tightening torque) or
continue with the setting work.

DL2-35E · Edition 03.22
EN-4
5 ADJUSTMENT
The switching pointpScan be adjusted using the ad-
justing screw.
1 Disconnect the system from the electrical power
supply.
2 Unscrew the housing cover.
3 Carefully remove the AMP plugs from the contacts.
4 Connect an ohmmeter.
5
COM
3
NC
1
NO
2
NO
2
NC
1
COM
3
6 Adjust switching pointpSusing the adjusting screw,
see tables in the section entitled “Adjusting range”.
7 8
9 Connect a pressure gauge.
10
0ps
11 Apply pressure. In doing so, monitor the switching
point on the ohmmeter and the pressure gauge.
12 If the DL2-35E does not trip at the desired switch-
ing point, correct the adjusting range using the
adjusting screw. Relieve the pressure and repeat
the process.
13 After successfully completing the settings, slide the
AMP plugs back onto the contacts and install the
housing cover (see page 5 (8 Technical data)
for tightening torque).
5.1 Adjusting range DL2-35E
Type Adjusting range1)
[Pa]
Mean
switching
differential2)
[Pa]
min. max. min. max.
DL2E,
DL2ET 20 200 15 25
DL2EH 45 200 15 25
DL4E,
DL4ET 50 400 20 50
DL4EH 70 400 20 50
DL14E,
DL14ET 300 1400 30 60
DL35E,
DL35ET 1200 3500 60 100
Type Adjusting range1)
["WC]
Mean
switching
differential2)
["WC]
min. max. min. max.
DL2ET 0.12 0.8 0.05 0.10
DL4ET 0.2 1.6 0.08 0.20
DL14ET 1.20 5.6 0.12 0.24
DL35ET 4.8 14.1 0.24 0.40
1) Adjusting tolerance ±15% of the scale value, but min.
±10Pa [±0.04"WC].
2) Mean switching differential at min. and max. setting or
by agreement.
Type
Deviation from the switching
point during testing pursuant
to EN1854 Air pressure
switches
DL2E,
DL2ET ± 15%/min. ± 6Pa [± 0.02 "WC]
DL2EH ± 15%/min. ± 8Pa
DL4E,
DL4ET ± 15%/min. ± 8Pa [± 0.03 "WC]
DL4EH ± 15%/min. ± 12Pa
DL14E,
DL14ET ± 15%/min. ± 40Pa [± 0.16 "WC]
DL35E,
DL35ET ± 15%/min. ± 90Pa [± 0.36 "WC]
6 FUNCTION CHECK
We recommend a function check once a year.
7 ACCESSORIES
7.1 L-angle bracket (A)
48 mm
(18.9")
34 mm
(13.38")
∅4,3 mm
(0.17")
∅
3,1 mm
(0.12")
Shape A, Order No.: 74919825.
7.2 Z-angle bracket
59 mm (0.232")
40 mm (0.157")
∅4,2 mm (0.165")
∅
5,5 mm (0.217")
Order No. 74919824.

DL2-35E · Edition 03.22
EN-5
7.3 Securing clip S
Only two holes in the mounting plate or air duct are
required for secure mounting.
56 (2.2")
0,8 – 1,1
(0.03 – 0.043")
ø 5,8 (0.23")
Order No.: 34335764.
7.4 Securing clip D
For pressure-resistant mounting, the D clip is fitted
to the mounting plate from the front or from the back.
Simply push the pressure switch onto the clip.
35 mm
(1.38")
35 mm
(1.38")
ø 3,0 mm
(0.12")
For attachment to the side of the pressure port: white
clip. Order No.: 74921513.
For attachment to the three other sides: blue clip. Order
No.: 74921512.
7.5 Motor flange adapter
Set including retaining screws for direct mounting on
the fan motor.
Order No.: 74920415
7.6 Tube set
To be used with air only.
With 2m PVC tube, 2 duct connection flanges with
screws, 2x90mm extensions, 2angle connectors
for DL
Order No.: 74919272.
7.7 DL2–35E: grommet
Grommet for enclosure IP 42/IP 44 depending on
the installation position.
IP 42 IP 44
IP 44
IP 44
Installation in the horizontal position and upside down:
IP 44
Order No.: 34919801
8 TECHNICAL DATA
Ambient conditions
Enclosure to IEC 60529:
IP 00 = without cover,
IP 10 = any installation position with cover,
IP 21 = opening in cover points downwards,
IP 42/44 = cover with cable grommet.
Permitted ambient temperature in operation:
DL..E: -20 to +85°C (-4 to +185°F),
DL..EH: -40 to +110°C (-40 to +230°F),
DL..T: -40 to +60°C (-40 to +140°F).
Storage and transport temperatures:
DL..E, DL..T: -20 to +40°C (-4 to +104°F),
DL..EH: -20 to +60°C (-4 to +140°F).
Icing, condensation and dew in and on the unit are
not permitted.
Safety class II to VDE0106-1.
This unit is not suitable for cleaning with a high-pres-
sure cleaner and/or cleaning products.

DL2-35E · Edition 03.22
EN-6
Mechanical data
Micro switch to EN61058-1.
Gas types: air or flue gas, no flammable gases, no
aggressive gases.
Medium temperature = ambient temperature.
Max. inlet pressure pmax. = withstand pressure or
differential pressure:
DL..E = 5000Pa (20 "WC),
DL..EH = 1500Pa (6 "WC),
DL..ET = 5000Pa (20 "WC).
Switching differential, see page 4 (5.1 Adjusting
range DL2-35E).
Diaphragm pressure switch, tempered LSR dia-
phragm system.
Housing: glass fibre reinforced PBT plastic with low
gas release.
Weight: 83 g (2.9 oz).
Recommended tightening torque:
Component Tightening torque [Ncm]
Cover screws 65
Strain relief facility 65
Electrical data
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
DL..G 5–48VDC 0.01–1A 0.01–1A
DL..T 30–
240VAC 5A 0.5A
DL..TG < 30V AC/
DC 0.1A 0.05A
Contact gap <3mm (μ).
If the pressure switch 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.
9 DESIGNED LIFETIME
This information on the designed lifetime is based on
using the product in accordance with these operat-
ing 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 DL2-35E:
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 ther-
moprocessing equipment, observe local regulations.
10 CERTIFICATION
Declaration of conformity
We, the manufacturer, hereby declare that the prod-
ucts DL2-35E with product ID No. CE- 0085AP0466
comply with the requirements of the listed Directives
and Standards.
Directives:
– 2014/35/EU – LVD
– 2014/30/EU – EMC
– 2011/65/EU – RoHS II
– 2015/863/EU – RoHS III
Regulation:
– (EU) 2016/426 – GAR
Standards:
– EN1854:2010
The relevant product corresponds to the tested type
sample.
The production is subject to the surveillance proce-
dure pursuant to Regulation (EU) 2016/426 AnnexIII
paragraph3.
Elster GmbH
Scan of the Declaration of conformity (D,GB)– see
www.docuthek.com
10.1 FM and AGA approval, UL listing, Eurasian
Customs Union, RoHS compliant
AGA
10.2 REACH Regulation
The device contains substances of very high concern
which are listed in the Candidate List of the European
REACH Regulation No.1907/2006. See Reach list
HTS at www.docuthek.com.
10.3 China RoHS
Directive on the restriction of the use of hazardous sub-
stances (RoHS) in China. Scan of the Disclosure Table
China RoHS2, see certificates at www.docuthek.com.

DL2-35E · Edition 03.22
EN-7
11 LOGISTICS
Transport
Protect the unit from external forces (blows, shocks,
vibration).
Transport temperature: see page 5 (8 Technical
data).
Transport is subject to the ambient conditions de-
scribed.
Report any transport damage on the unit or packaging
without delay.
Check that the delivery is complete.
Storage
Storage temperature: see page 5 (8 Technical data).
Storage is subject to the ambient conditions described.
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.
12 DISPOSAL
Devices with electronic components:
WEEE Directive 2012/19/EU – Waste Electrical
and Electronic Equipment Directive
At the end of the product life (number of op-
erating cycles reached), dispose of the pack-
aging and product in a corresponding recycling
centre. Do not dispose of the unit with the usu-
al domestic refuse. Do not burn the product.
On request, old units may be returned carriage paid
to the manufacturer in accordance with the relevant
waste legislation requirements.

DL2-35E · Edition 03.22
EN-8
© 2022 Elster GmbH We reserve the right to make technical modifications in the interests of progress.
The Honeywell Thermal Solutions family of products includes
Honeywell Combustion Safety, Eclipse, Exothermics, Hauck,
Kromschröder and Maxon. To learn more about our products, visit
ThermalSolutions.honeywell.com or contact your Honeywell Sales
Engineer.
Elster GmbH
Strotheweg 1, D-49504 Lotte
T [phone]
[email protected]
www.kromschroeder.com
Global centralized service deployment coordination:
T [phone] or -555
[email protected]
Translation from the German
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