U-20808/U-20809 Non-Adjustable Vertical Indicator Posts
Installation
6
10. Using the Wrench, open and
close the valve and check to see
that the “SHUT” and “OPEN” Targets
are clearly in view in the Windows,
at their respective positions, and
that there is no feeling of binding
of the Upper or Lower Stem
Assemblies. It is recommended
that the turns to open/close be
counted and compared to the valve
manufacturer’s specification, in order
to verify full valve opening.
NOTES: If there is any indication
of binding of the internal operating
parts, the vertical alignment of the
Indicator Post must be corrected.
If the Target Plates are not properly
in view, completely close the PIV
and then repeat Steps 5 – 10.
11. Back fill to final grade and repeat
Step 11.
12. Tighten the switch mounting hole
plug if the Supervisory Control Valve
Switch is not to be immediately
attached.
13. Install the Supervisory Control
Valve Switch (supplied by customer)
a) Remove the Cover from the
assembly, and then loosen the
Trip Rod Locking Screw. Adjust
the position of the Trip Rod so
that it extends about 1
3
/
8
” beyond
the Nipple, and then securely
tighten the Trip Rod Locking
Screw.
b) Rotate the Post Operating Nut
until the PIV is fully open. Note
the position of one of the “OPEN”
Targets in its Window.
c) Rotate the Operating Stem until
the “OPEN” Targets are out of the
Post Windows. Note the direction
in which the “OPEN” Target will
move when it is returned to the
Post Window.
d) Remove the Nipple from the
assembly, and then with the
Locknut screwed over the Nipple
threads, hand tighten the Nipple
into the
1
/
2
” NPT hole provided in
the Post Head, and then tighten
the Locknut against the Post
Head to secure the Nipple firmly
in place.
e) Refer to “Attachment of
Supervisory Control Valve Switch”
(right) as appropriate, and note
the direction in which the Trip Rod
must move when the “OPEN”
Target is returned to the Post
Window.
Slide the Switch Assembly as far
as possible onto the Nipple while
maintaining proper orientation of
the assembly, and then tighten
the Set Screw that holds the
assembly onto the Nipple.
f) Attach leads from an electrical
continuity meter to the
appropriate terminals.
g) Return the valve to its fully open
position. Verify that the “OPEN”
Target returns to the position
noted in Step b. Also, verify that
the Switch contacts change
position within two turns of the
valve being fully open.
h) Begin to return the valve to its
closed position. Verify that the
Switch contacts change back to
their original position within two
turns from full open.
NOTE: If the Upper Stem
Assembly binds before the
“OPEN” Target reaches its
full open position, or the
switch contacts do not change
position as described in Steps
g and h, then the Targets must
be readjusted.
If the Targets require
readjustment, close the PIV,
remove the Switch assembly,
and repeat Steps 5 – 10;
however, when positioning the
Targets, rotate both Targets at
the same time as necessary so
that the “OPEN” target will trip
the Actuator Rod of the Switch.
Repositioning of the “OPEN”
and “SHUT” Targets relative
to each other should not be
necessary. Repeat Steps b – h.
attachment of sUpervisory
control valve switch
Left-Hand Opening Valves
targets
move
Up as
valve is
shut
Left-Hand
Opening Valve is
Shut by Turning
Wrench to the
Right (Clockwise)
switch
actuator
rod
supervisory
switch
target
switch
trip rail
Right-Hand Opening Valves
targets
move down
as valve is
shut
Right-Hand
Opening Valve is
Shut by Turning
Wrench to the Left
(Counter-clockwise)
switch
actuator
rod
target
switch
trip rail
i) Remove the electrical continuity
test leads. The external field
wiring connections can now be
made to the Switch.
NOTE: Use of a weathertight
conduit connector with a
gasket seal is recommended.
supervisory
switch