D770-28-00
2
I56-1430-000
Section 1
Installation Instructions For Post Indicator Valves
1.
There are two types of post indicator valves - rising flag
and falling flag. In a rising flag installation, the
PIBVEXP mounts below the target assembly, as shown
in Figure 1A. Closing the valve raises the target assem-
bly and releases the actuating lever on the PIBV1EXP.
In a falling flag installation, the PIBVEXP mounts
above the target assembly (Figure 1B). Closing the
valve lowers the target assembly and releases the actu-
ating lever on the PIBVEXP.
The PIBVEXP will work for either application. To
prevent binding on the actuating lever the unit must
be oriented with the conduit entry pointing down-
ward for a rising flag application and pointing up-
ward for a falling flag application. An improper
installation can cause damage to the PIBVEXP de-
vice.
2.
If the post indicator valve is predrilled with
1
/
2
" NPT
mounting hole, remove the plug and go to step 6. If the
post indicator valve is NOT equipped with a
1
/
2
" NPT
mounting hole, it will be necessary to drill and tap the
hole.
3.
Position the valve in the fully open position ("OPEN"
should appear in the window) and remove the head
and target assembly. In doing so, ensure that the as-
sembly can be reinstalled with its original adjustment.
4. (a)In a falling flag installation (flag lowers as valve is
closed), measure the distance from the bottom of the
head to the upper surface of the target that will con-
tact the actuating lever of the PIBVEXP. Add
3
/
32
" to
this measurement and mark the outside of the hous-
ing at that location. Drill with a
23
/
32
" drill bit and tap
a
1
/
2
" NPT thread.
(b)In a rising flag installation (flag rises as valve is
closed), measure the distance from the bottom of the
head to the lower surface of the target that will con-
tact the actuating lever. Subtract
3
/
32
" to this measure-
ment and mark the outside of the housing at that
location. Drill with a
23
/
32
" drill bit and tap a
1
/
2
" NPT
thread.
Figures 1A and 1B:
Rising Flag
Falling flag
5.
Replace the head and target assembly.
6.
Screw the locknut onto the threaded nipple which is
supplied with the PIBVEXP.
7.
Screw the nipple hand tight into the
1
/
2
" hole in the
valve and tighten the locknut against the housing to se-
cure the nipple in position.
8.
Insert a probe into the hole through the nipple to mea-
sure the distance from the open end of the nipple to the
to the desired position on the target assembly. Subtract
5
/
8
" from the distance and set the length of the actuat-
ing lever of the PIBVEXP from the end of the enclosure
to this distance. Tighten the set screw which holds the
actuating lever.
9.
Close the valve 3 to 4 revolutions.
10. Install the PIBVEXP onto the nipple and orient the con-
duit entry per Section 1. Apply pressure to the
PIBVEXP and lock the set screws to secure the nipple to
the PIBVEXP.
11. Slowly open the valve to its fully open position. The
switch should trip as the valve opens, but not force the
actuating lever against the nipple when fully open. To
check for this condition, open the valve fully and de-
press the top of the actuating cam to stretch the actuat-
ing spring further. There should be some additional
movement available. If no movement is available, dam-
age may occur to the PIBVEXP actuator lever. It will be
necessary to adjust the flag location by removing the
head and turning the handle while the valve stem is
disengaged (refer to the valve manufacturer.)
12. After checking the fully open position to ensure ad-
equate clearance, close the valve slowly until the
PIBVEXP contacts trip. The switches must trip within
1
/
5
of the full travel distance of the valve.
13. If the PIBVEXP does not change states within
1
/
5
of the
length of travel, it may be necessary to adjust the flag
up or down by removing the head and turning the
handle (refer to the valve manufacturer.)
14. Wire the switch as shown in Fig. 3.
Section 2
Installation Instructions For Butterfly Valves
(See Figure 2)
1. Remove the
1
/
2
" NPT plug from the gear housing.
2. Loosen 2 set screws that hold the nipple on the
PIBV2EXP and remove the nipple.
3. Screw the locknut onto the nipple.
4. Screw the nipple into the
1
/
2
" NPT hole and hand
tighten. Tighten the locknut firmly to the housing to se-
cure the nipple.
5. Open the valve fully and close the valve approximately
3 revolutions, noting which direction the target moves.
6. Retract the actuating arm and install PIBVEXP onto the
nipple, orienting the PIBVEXP to trip the switch as the
valve closes. To prevent binding on the actuating lever,
D770-28-00
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I56-1430-000
the unit must be oriented so the flag falls away from the
actuating lever when the valve is closed. Apply pressure
to PIBVEXP and tighten set screws to secure the assembly.
7. Slide the actuating arm into the valve until it bottoms
on the flag, but do not tighten the lever screw.
8. Open the valve to the full open position and tighten the
lever screw to hold actuating arm in position. (Actuat-
ing arm length will adjust slightly as valve is opened.)
Check to ensure that in the full open position the actu-
ating arm is not resting on the nipple.
9. Carefully close valve and note the number of handle
revolutions until the switch trips. The switch must trip
within
1
/
5
of the total travel range of the valve.
10. Wire the switch as shown in Fig. 3.
Figure 2:
Figure 3:
SUP. SWITCH
SUP. SWITCH
TO NONSILENCEABLE
INITIATING ZONE OF
LISTED FACP
END OF LINE
RESISTOR
TYPICAL FACP CONNECTION
TO POWER SOURCE
COMPATIBLE WITH BELL
TYPICAL LOCAL BELL CONNECTION
LOCAL
BELL
BREAK WIRE AS SHOWN FOR SUPERVISION
OF CONNECTION. DO NOT ALLOW STRIPPED
WIRE LEADS TO EXTEND BEYOND SWITCH
HOUSING. DO NOT LOOP WIRES.
TO
O
P
E
N
CLOSE
CLOSE
A78-1633-01
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