Dungs FRM 100025 HD, Instruction Manual, Page: 127 / 174

18 …64
Edition 10.15 • No
. 270 442
19 … 64
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11.2 SSD setting
Switch-off setting in case of overpressure p
do
1. Remove the protective cap A .
2. Turn the external adjusting screw B using a socket
wrench SW 22 .
3. Turning clockwise: increase (+) in the upper shut down
pressure p
do
.
4. Turning counter-clockwise: reduction (+) in the upper
shut down pressure p
do
.
5. After the setting: screw on the protective cap A again.
Triggering setting in case of underpressure p
du
1. Remove the protective cap A .
2. Turn the internal adjusting screw C using a socket
wrench SW 17 .
3. Turning clockwise: increase (+) in the lower shut down
pressure p
do
.
4. Turning counter-clockwise: reduction (+) in the lower
shut down pressure p
do
.
5. After the setting: screw on the protective cap A again.
Attention: The setting for lower triggering affects the
set value for upper triggering. Please set the vacuum
triggering, first.
A mutual influence of the pressure regulator and the safety shutoff valve must be excluded.
Calculation of the recommended set values according
to the outlet pressure p
d
of the regulator
• The SSD must lock as soon as it reaches the 1.1 times
max. operating pressure according to the system speci -
fications.
• The set values of the SSD must be defined taking into
account the set values and tolerances
of the pressure regulator.
• The tolerances and set values of additional safety de -
vices must also be considered when setting of the SSD.
• In case of a fault or regular shut-down of the down -
stream shutoff valve the SSD may not
be actuated. The upper shut-down pressure must be
determined accordingly.
p
d
≤ 100 mbar
p
do
= p
d
+ 50 mbar
100 mbar < p
d
≤ 200 mbar
p
do
> p
d
+ 100 mbar
p
d
> 200 mbar
p
do
> p
d
x 1.5
A
B
C
F
E
G
D
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