Honeywell DG-T Series, Operating Instructions Manual

Page: 4 / 6

DG..T · Edition 01.22
EN-4
Pressure switches (DG..t, DG..Ft, DG..st):
type
Adjust-
ing
range 1)
"WC
(mbar)
Mean
switch-
ing
differ-
ential 2)
"WC
(mbar)
Max. inlet
pressure
psi (mbar)
With
venting
line 3)
no
venting
line
DG 6T
0.2–2.4
(0.5–6)
0.08–
0.12
(0.2–0.3)
8.5
(600)
2.4
(165)
DG 10T
0.4–4
(1–10)
0.1–0.16
(0.25–
0.4)
8.5
(600)
7
(480)
DG 50T
1–20
(2.5–50)
0.32–0.6
(0.8–1.5)
8.5
(600)
7
(480)
DG 150T
12–60
(30–150)
1.2–2
(3–5)
8.5
(600)
7
(480)
DG 500T
40–200
(100–
500)
3.2–6.8
(8–17)
8.5
(600)
7
(480)
Pressure switches with manual reset (DG..Ht,
DG..nt):
type
Adjust-
ing
range 1)
"WC
(mbar)
Reset
pres-
sure 4)
"WC
(mbar)
Max. inlet
pressure
psi (mbar)
With
venting
line 3)
no
venting
line
DG 10T
0.4–4
(1–10)
0.16–
0.4
(0.4–1)
8.5
(600)
7
(480)
DG 50T
1–20
(2.5–50)
0.4–0.8
(1–2)
8.5
(600)
7
(480)
DG 150T
12–60
(30–150)
2–6
(5–15)
8.5
(600)
7
(480)
DG 500T
40–200
(100–
500)
6–10
(15–25)
8.5
(600)
7
(480)
1) Adjusting tolerance = ± 15% of the scale value.
2) Mean switching differential at min. and max. setting
"WC (mbar).
3) Connect the venting line to port 4. Connections, see
page 2 (3 Installation).
4) Difference between switching pressure and possible
reset.
6 PRessURe sWItCHes WItH MAn-
UAL 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 differential be-
tween the switching pressure and possible lock-off.
DG..HT: the pressure must have dropped at least
to the set switching point minus the pressure differ-
ential 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 (5 Adjustment).
7 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 minutes
3
N
2
4
8 MAIntenAnCe CYCLes
Check for external tightness at least once per annum,
at least twice per annum for operation with biogas.
9 ACCessoRIes
9.1 Blue pilot lamp for 110/120 V AC
110/120 V AC, I = 1.2 mA, Order No.: 74916121.
1 2 3
4