Operators manual
© 2017 Honeywell International Inc.
Operators manual underground gas pressure reducing station
Type: HON COCON 13
Page 24
15
Relatch
the
ssd
controller
(take
note
of
the
minimal
relatching
differential)
by
first
backing
out
the
adjust
screw
of
the
regulator
pilot
and
then
decreasing
the
downstream
pressure
by
opening
&
closing
the
purge
valve.
Equalize
pressure
over
the
closing
member
by
using
the
built
‐
in
bypass
(push
the
reset
‐
button
as
previously
described)
Finally
relatch
the
SSV
by
pushing
the
button
all
the
way
to
its
stop
(push
twice)
16
Re
‐
check
the
upper
trip
pressure
and
fine
‐
adjust
if
necessary
by
repeating
actions
13
to
15
Note:
re
‐
latch
the
ssd
controller
each
time
at
approximately
the
same
set
pressure
4.3.2.2
–
Relief
Valve
(optional)
Start
at
4.3.2.1
(first
time
only)
1
Check
if
the
discharge
line
of
the
relief
valve
has
been
provided
with
an
open
indicator
2
Increase
the
downstream
pressure
to
the
desired
set
point
of
the
relief
valve
2a
if
necessary
decrease
initially
the
downstream
pressure
by
opening
&
closing
the
purge
valve
2b
by
advancing
the
adjust
screw
(CW)
of
the
regulator
pilot
(do
not
open
the
hand
relief)
3
Slowly
decrease
the
opening
pressure
spring
tension
3a
by
backing
out
the
adjust
screw
(CCW)
of
the
relief
valve
3b
until
the
relief
valve
opens
(use
an
indicator)
4
Close
the
relief
valve
(mind
the
minimum
closing
difference)
4a
by
first
backing
out
the
adjust
screw
of
the
regulator
pilot
4b
decrease
the
downstream
pressure
by
opening
&
closing
the
purge
valve
5
Check
the
discharge
line
for
lockup
6
Check
the
opening
pressure
and
fine
‐
adjust
if
necessary
6a
by
repeating
action
2
u/i
4
If
applicable
remove
the
opening
indicator
&
restore
any
changes
made
to
the
tubing
4.3.2.3
–
Active
and
Monitor
Regulator
Start
at
4.3.2.1
(first
time
only)
1
Decrease
the
downstream
pressure
to
just
below
the
set
point
of
the
regulator.
This
can
be
done
by
opening
&
closing
the
hand
relief
valve.(purge)
1a
Then
advance
the
adjusting
screw
(CW)
of
the
regulator
pilot
(do
not
open
the
purge
valve)
until
the
set
point
of
the
regulator
is
reached.
2
Check
the
downstream
pressure
for
lockup.
4.3.2.4
–
Gas
Control
Module
1
Check
the
atmospheric
upper
chamber
for
leakages
with
a
leak
detector
before
commissioning.