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
contact the actuating lever of the PIBV2. Add
3
⁄
32
˝ to this measurement and
mark the outside of the housing 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 dis
-
tance from the bottom of the head to the lower surface of the target that will
contact the actuating lever. Subtract
3
⁄
32
˝ to this measurement and mark the out
-
side of the housing at that location. Drill with a
23
⁄
32
˝ drill bit and tap a
1
⁄
2
˝ NPT
thread.
5.
Replace the head and target assembly.
6. Loosen the set screw that holds the nipple on the PIBV2 and remove the
nipple.
7. Screw the locknut onto the threaded nipple which is supplied with the PIBV2.
8. Screw the nipple hand tight into the
1
⁄
2
˝ hole in the valve and tighten the locknut
against the housing to secure the nipple in position.
9. Insert a probe into the hole through the nipple to measure the distance from the
open end of the nipple to the desired position on the target assembly. Subtract
5
⁄
8
˝ from the distance and set the length of the actuating lever of the PIBV2 from
the end of the enclosure to this distance. Tighten the screw which holds the
actuating lever.
NOTE: Place cover over PIBV2 to ensure that actuating lever does not
interfere with cover. If actuating lever interferes with cover, remove lever
and break off additional length at breakaway point. Repeat step 8 to re-
install actuator lever. Refer to Figure 7.
10. Close the valve 3 to 4 revolutions.
11. Install the PIBV2 onto the nipple and orient the conduit entry down (See Figure
4). Apply pressure to the PIBV2 and lock the set screws to secure the nipple to
the PIBV2.
12. 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 depress the top of
the actuating cam to stretch the actuating spring further. There should be some
additional movement available. If no movement is available, damage may oc
-
cur to the PIBV2 actuator lever. It will be necessary to adjust the flag location
by removing the head and turning the handle while the valve stem is disen-
gaged (refer to the valve manufacturer.)
13. After checking the fully open position to ensure adequate clearance, close the
valve slowly until the PIBV2 contacts trip. The switches must trip within
1
⁄
5
of
the full travel distance of the valve.
14. If the PIBV2 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.)
SECTION 2
INSTALLATION INSTRUCTIONS FOR BUTTERFLY VALVES (SEE FIGURE 3)
1.
Remove the
1
⁄
2
˝ NPT plug from the valve housing.
2. Loosen the set screw that holds the nipple on the PIBV2 and remove the
nipple.
3. Screw the locknut onto the threaded nipple which is supplied with the PIBV2.
4.
Screw the nipple into the
1
⁄
2
˝ NPT hole and hand tighten. Tighten the locknut
firmly to the housing to secure 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 PIBV2 onto the nipple, orienting the
PIBV2 to trip the switch as the valve closes. If the conduit entry is on the wrong
side, it will be necessary to reverse the action of the switch (see Section 4). Ap
-
ply pressure to PIBV2 and tighten set screw to secure the assembly.
7.
Slide the actuating arm into the valve until it bottoms on the flag, but do not
tighten the screw which holds the actuating lever.
NOTE: Place cover over PIBV2 to ensure that actuating lever does not interfere
with cover. If actuating lever interferes with cover, remove lever and break off
additional length at breakaway point. Refer to Figure 7.
8. Open the valve to the full open position and tighten screw to hold actuating
arm in position. (Actuating arm length will adjust slightly as valve is opened.)
Check to ensure that in the full open position the actuating arm is not resting
on the nipple. Do this by depressing the actuating cam to further stretch the
spring, ensuring that more travel is available when the valve is open. If there is
no travel, damage may occur to PIBV2 actuating arm. Some slight alteration of
the valve stop setting may be necessary to ensure that no damage occurs.
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.
FIGURE 3:
T
O
O
P
E
N
CLOSE
CLOSE
W0214-00
SECTION 3
GENERAL INSTALLATION INSTRUCTIONS
1. Installation Positions
FIGURE 4:
ACTUATOR VERTICAL (DOWN)
ACTUATOR HORIZONTAL
ACTUATOR VERTICAL (POINTING UP)
EXAMPLES OF ACCEPTABLE MOUNTING POSITIONS:
EXAMPLE OF MOUNTING POSITIONS
NOT
ACCEPTABLE:
W0381-00
2.
Ground Screw — A ground screw is provided with all supervisory switch mod-
els. When grounding is required, clamp wire with the screw in hole located near
conduit entrance.
3.
Wiring — See Figure 6, Page 4.
SECTION 4
REVERSING THE ACTION OF PIBV2
1. Loosen the three
3
/
16
˝ hex (socket head) screws on the top of the black switch
enclosure so that the switch enclosure is loose and free to move (see Figure 5).
2
I56-0394-011R
04-29