DG..H, DG..N, DG..I · Edition 03.22
EN-2
2 CHeCKInG tHe UsAGe
For monitoring increasing and decreasing gas or air
pressure.
-6 -5 -4 -3 -2 -1 0 1 2 3 4 5 6
Increasing
negative pressurea
Decreasing
negative pressure
Increasing pressure
Decreasing pressure
Positive pressure
negative
pressure
DG..H,
DG..N
Gas, air, flue gas
Air, flue gas
DG..I
Air, flue gas
Gas, air, flue gas
DG..H switches and locks off with rising pressure,
DG..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 8 (9 Technical data). Any
other use is considered as non-compliant.
2.1 type code
DG
Pressure switch for gas
1,5
Negative pressure adjusting range
-1.5 – -0.5/+0.5 – +3 mbar
10
Adjusting range 1 – 10 mbar
12
Negative pressure adjusting range
-12 – -1/+1 – +7 mbar
18
Negative pressure adjusting range
-2 – -18 mbar
50
Adjusting range 2.5 – 50 mbar
120
Negative pressure adjusting range
-10 – -120 mbar
150
Adjusting range 30 – 150 mbar
450
Negative pressure adjusting range
-80 – -450 mbar
500
Adjusting range 100 – 500 mbar
H
Switches and locks off with rising pres-
sure
n
Switches and locks off with falling pres-
sure
I
Negative pressure for gas
G
With gold-plated contacts
-3
Electrical connection via screw terminals
-4
Electrical connection via screw terminals, IP 65
-5
Electrical connection via 4-pin plug,
without socket, IP 54
-6
Electrical connection via 4-pin plug,
with socket, IP 54
-9
Electrical connection via 4-pin plug, with
socket, IP 65
K2
Red/green pilot LED for 24 V DC/AC
t
Blue pilot lamp for 230 V AC
t2
Red/green pilot LED for 110 to 230 V AC
n
Blue pilot lamp for 120 V AC
A
External adjustment
2.2 Part designations
1
2
3
4
5
1
Upper housing section with cover
2
Lower housing section
3
Hand wheel
4
M16 cable gland
5
DG..H, DG..N with manual reset
2.3 type label
DG
CE
2
1
3
D-49018 Osnabrück, Germany
Max. inlet pressure = withstand pressure, mains volt-
age, ambient temperature, enclosure: see 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.
– Use approved sealing material only.
– Check max. ambient temperature – see page
– Vapours containing silicone can adversely affect
the functioning of electrical contacts. When
using silicone tubes, only use silicone tubes
which have been sufficiently cured.
– 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,
the switching point shifting or corrosion in the
device which can lead to malfunctions.
– When installing outdoors, place the pressure
switch in a roofed area and protect from direct
sunlight (even IP 65 version). To avoid conden-
sation, the cover with pressure equalization
element can be used. See page 6 (8.5
Pressure equalization element)
– Avoid strong impact on the unit.
– In case of highly fluctuating pressures, install a
damping nozzle/restrictor orifice.
➔
The DG must not be in contact with masonry. Min-
imum clearance 20 mm.
➔
Ensure that there is sufficient installation space.
➔
Ensure unobstructed view of the hand wheel.
