Operators manual
© 2017 Honeywell International Inc.
Operators manual underground gas pressure reducing station
Type: HON COCON 13
Page 25
4.4
–
Commissioning
of
the
HON
Cocon
Start
at
4.3.2.1(first
time
only)
1
Check
if
regulator
&
line
pressures
are
set
to
the
approximate
set
points.
The
regulator
should
be
preset
slightly
below
the
grid
pressure.
2
Crack
upstream
&
downstream
block
valves
in
the
following
order.
3
Gradually
open
the
downstream
isolation
valve
of
the
HON
Cocon.
A
short
pressure
peak
could
occur
at
this
point.
To
avoid
triggering
of
the
slam
shut
valve,
depress
and
hold
the
reset
button
at
this
point
until
fully
open.
4
Gradually
open
downstream
block
valve.
5
Gradually
open
upstream
isolation
valve
of
the
HON
Cocon.
6
Gradually
open
the
upstream
block
valve.
7
Increase
the
regulator
pilot
spring
tension
by
adjusting
the
screw
inwards
until
the
required
set
point
is
reached
in
the
outlet
piping.
8
Fine
tune
the
regulator
if
necessary.
Notes:
Change
pressure
spring
of
pilot
for
next
higher
in
range
to
increase
damping
if
necessary.
Install
a
flow
restrictor
in
the
motorization
line
of
the
pilot
to
increase
damping
further
if
required.
(Check
with
manufacturer
for
advise)
To
take
the
unit
out
of
operation,
close
the
upstream
block
valve
first
Do
not
forget
to
connect
all
data
‐
transmitting
devices
Clean
and
grease
the
seal/sealings
surfaces
before
mounting
the
covers.