GB-4
D
GB
F
NL
I
E
Checking the function
Checking the trip pressure
The JSAV is checked for the required trip pressure.
Vent the system.
▷
Ensure that the valve seat of the JSAV is open,
see page 5 (Resetting).
▷
Ensure that the breather screw plug is screwed in.
Close all manual valves at the inlet and outlet,
and in the relief line.
CAUTION
Please observe the following to ensure that the
regulator is not damaged during the function check:
– Do not exceed the maximum outlet pressure p
d
of the regulator.
Lower or increase the outlet pressure p
d
on the
regulator until the required trip pressure p
do
or
p
du
is reached.
0
p
d
p
d JSAV
▷
The JSAV closes at the set trip pressure.
0
klack
p
d
p
d JSAV
klack
p
d
4
5
▷
The JSAV has closed successfully: to restart the
system, the JSAV must be opened again, see
page 5 (Resetting).
▷
The JSAV does not close at the required trip
pressure and must be readjusted, see page 4
(Setting the trip pressure).
Checking the tightness of the valve disc
▷
Ensure that the outlet is closed.
Vent the system.
Slowly open the manual valve at the inlet.
The outlet pressure p
d JSAV
must not rise.
Setting the trip pressure
Select the upper trip pressure p
do
according to
the outlet pressure p
d
of the pressure regulator.
20
0
40 60 80 100 140
180
220
260
300
340
50
100
150
200
250
300
350
400
450
500
pd [mbar]
p do
[mbar
]
VSBV
JSAV
Remove the breather screw plug.
Adjust the selected upper trip pressure p
do
and
the lower trip pressure p
du
. Determine p
du
de-
pending on the system conditions.
+
–
p
do
p
du
4
Reset the JSAV, see page 5 (Resetting).
5
Check the upper and lower trip pressure again,
see page 4 (Checking the function).
Replacing the spring
▷
Various trip pressure ranges can be achieved by
using different springs on the JSAV.
Choose a spring/springs according to the re-
quired trip pressure.
Spring table
Upper trip pressure p
do
Marking
Order No.
[mbar]
["WC]
18 – 60
7 – 23.4
black
03089068
50 – 80
19.5 – 31.2
orange
03089069
60 – 110 23.4 – 42.9
red
03089070
100 – 210*
39 – 81.9* dark green 03089071*
200 – 350
78 – 136.5
yellow
03089072
280 – 500 109.2 – 195
white
03089073
Lower trip pressure p
du
Marking
Order No.
[mbar]
["WC]
8 – 16*
3.12 – 6.24*
light blue 03089082*
16 – 60
6.24 – 23.4
brown
03089083
60 – 150 23.4 – 58.5
violet
03089084
* Standard spring
Removing the spring(s)
Depressurize the system.
▷
To be able to change the springs, we recommend
dismantling the measuring unit of the JSAV, see
page 5 (Replacing the measuring unit).
Once the measuring unit has been dismantled,
remove the listed indivdual parts from the meas-
uring unit one after the other.
