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Installation
CAUTION
Please observe the following to ensure that the DG..C
is not damaged during installation and operation:
– Continuous operation with gases containing
more than 0.1 %-by-vol. H
ageing of elastomer materials and reduces 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 5 (Technical data).
– Max. inlet pressure p
– Max. test pressure for testing the entire system:
temporarily < 15 min. 2 bar (29 psig).
– Protect the appliance against dirt or moisture
(icing of condensation at subzero temperatures)
in the medium to be measured, e.g. install a filter
and ensure there is a riser.
– Avoid strong impact on the unit.
– In case of highly fluctuating pressures, install a
restrictor orifice, see page 5 (Accessories).
DG..C
▷ Installation in the vertical or horizontal position.
If installed in a horizontal position, the pre-
set switching point will change by 0.2 mbar
(0.08 "WC).
(-0.08 "WC)
=
±0 mbar
(±0 "WC)
(+0.08 "WC)
▷ If the DG..C is installed with the plug pointing
downwards, the enclosure is reduced to IP 40.
▷ The DG..C must not be in contact with masonry.
Minimum clearance 20 mm (0.79 inches).
▷ Ensure that there is sufficient installation space.
▷ For DG..VC, ensure unobstructed view of the
hand wheel.
1 Disconnect the system from the electrical power
supply.
Shut off the gas supply.
Purge the pipe.
4
S accelerates the
2
600 mbar (8.5 psig).
max
-0.2 mbar
=
+0.2 mbar
=
5
Mounting the DG..C..1, DG..C..9 on valVario
gas solenoid valves
4
▷ For pressure test points for inlet pressure p
interspace pressure p
select the installation position for the pressure
switch from the operating instructions of the gas
solenoid valve.
▷ Use enclosed screws only.
6
Wiring
CAUTION
Please observe the following to ensure that the
DG..C is not damaged during operation:
– If the DG..C..G (DG..VCT..G) 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.
– Note the switching capacity, see page 5
(Technical data).
▷ The DG..C can be connected electrically using a
tab receptacle (4.8 × 0.8 mm) or using a socket.
▷ The DG..CT is connected electrically via a socket
with ½" NPT thread and pre-wired connection
leads.
DG..C
▷ The DG..C is available as an NO contact or a
change-over contact.
▷ Observe contact position for decreasing/increas-
ing pressure control:
Change-over contact switches from NO 2 to
NC 1 for decreasing pressure control, from
NC 1 to NO 2 for increasing pressure control.
NO contact opens for decreasing pressure
control, contact closes for increasing pressure
control.
GB-3
5
or outlet pressure p
z
7
DG..C
,
u
,
d
DG..CT
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