USA-4
USA
CAN
MEX
D
Pressure switches with manual
reset
▷
DG..NT locks off if the pressure drops to the
value set using the hand wheel.
▷
DG..HT locks off if the pressure rises to the value
set using the hand wheel.
1
Reset the pressure switch using the manual reset.
▷
Requirement for reset:
DG..NT: the pressure must have risen at least
to the set switching point plus the pressure dif-
ferential between the switching pressure and
possible lock-off.
DG..HT: the pressure must have dropped at least
to the set switching point minus the pressure
differential between the switching pressure and
possible lock-off.
▷
For details of the pressure differential between
the switching pressure and possible reset, see
table on page 3 (Adjustment).
Tightness test
1
Shut off the downstream gas pipeline close to
the valve.
2
Open the valve and the gas supply.
▷
Check all used ports for tightness.
N
2
13 psi
max. 29 psi
< 15 min
3
4
Maintenance
In order to ensure smooth operation, check the tight-
ness and function of the DG..T every year, or every
six months if operated with biogas.
Accessories
LED set, red/green
3
1
4
2
NC
1
COM
3
NO
2
N
NO
2
1 NC
3 COM
+
–
24 V DC, I = 16 mA; 24 V AC, I = 8 mA,
Order No.: 74921089.
110 to 230 V AC,
Order No.: 74923275.
