Honeywell Krom Schroder DG H Series, Operating Instructions Manual

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GB-2
D
GB
F
NL
I
E
Checking the usage
DG..H, DG..N, DG..I
For monitoring increasing and decreasing gas or
air pressure.
-6 -5 -4 -3 -2 -1 0 1 2 3 4 5 6
Increasing
negative pressure
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 7 (Technical data).
Any other use is considered as non-compliant.
Type code
Code Description
DG Pressure switch for gas
1,5 – 500 Max. setting in mbar
H
N
I
Locks off with rising pressure
Locks off with falling pressure
Negative pressure for gas
G With 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
A External adjustment
Part designations
1
2
3
5
4
1 Upper housing section with cover
 Lower housing section
 Hand wheel
4
M16 cable gland
5 DG..H, DG..N with manual reset
Type label
DG
2
1
3
D-49018 Osnabrück, Germany
CE
Max. inlet pressure p
max.
= withstand pressure, mains
voltage, ambient temperature, enclosure: see type
label.
Installation
CAUTION
Please observe the following to ensure that the DG
is not damaged during installation and operation:
– Continuous operation with gases containing more
than 0.1 %-by-vol. H
2
S or ozone concentrations
exceeding 200 µg/m³ accelerate the ageing of
elastomer materials and reduce the service life.
– Dropping the device can cause permanent dam-
age. In this event, replace the entire device and
associated modules before use.
– Use approved sealing material only.
– Check max. ambient temperature – see
page 7 (Technical data).
– When using silicone tubes, only use silicone
tubes which have been sufficiently cured.
– Vapours containing silicone can adversely affect
the functioning of electrical contacts.
– Condensation must not be allowed to get into
the housing. At subzero temperatures, malfunc-
tions/failures due to icing can occur.
– When installing outdoors, place the DG in a
roofed area and protect from direct sunlight
(even IP 65 version). To avoid condensation, a
cover with pressure equalization element (see
page 6 (Pressure equalization element)) can
be used.
– Avoid strong impact on the unit.
– In case of highly fluctuating pressures, install
a restrictor orifice (see page 6 (Restrictor
orifice)).
▷
The DG 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 position as required, preferably with
vertical diaphragm. Then the switching point p
S
corresponds to the scale value SK set on the
hand wheel. In other installation positions, the
switching point p
S
will change and no longer
correspond to the scale value SK set on the
hand wheel. Check the switching point.