➔
www.docuthek.com
USA CAN MEX
Cert. version 05.18
© 2018 Elster GmbH · Edition 09.18
Operating instructions
USA
CAN
MEX
D
USA-1
03251549
Translation from the German
Pressure switches for gas DG..T
Conversion, spare parts
All technical changes are prohibited. Only use OEM
spare parts.
Checking the usage
Gas pressure switches DG..T for monitoring increas-
ing and decreasing gas or air pressure.
Positive
pressure
Negative
pressure
DG..T,
DG..FT
Gas, air, flue gas,
biogas
Air, flue gas
DG..HT,
DG..NT
Gas, air, flue gas,
biogas
Air, flue gas
DG..ST
NH
3
, O
2
, air
–
DG..NT and DG..HT lock off after switching. They
can be unlocked using the manual reset.
This function is only guaranteed when used within the
specified limits – see page 5 (Technical data). Any
other use is considered as non-compliant.
Type code
Code
Description
DG
Gas pressure switch
6 – 500
Max. setting in mbar
F*
H*
N*
S*
Switches with falling pressure
Locks off with rising pressure
Locks off with falling pressure
Switches with rising and falling pressure;
for NH
3
, O
2
(without approval)
T
T-product
G
With gold-plated contacts
-2
-4
-9
Electrical connection
via screw terminals
via screw terminals, IP 65
4-pin plug, with socket, IP 65
1
2
1x ¼" NPT connection
2x ¼" NPT connections
K2
T2
N
Red/green pilot LED for 24 V DC/AC
Red/green pilot LED for 110 to 230 V AC
Blue pilot lamp for 120 V AC
A
External adjustment
* If “none”, this specification is omitted; DG..T
switches with rising pressure.
Part designations
1
2
3
5
4
1
Upper housing section with cover
2
Lower housing section
3
Hand wheel
4
½" NPT conduit coupling
5
Manual reset
(DG..NT and DG..HT only)
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 , 2 , 3
... = 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.
