INSTALLATION AND MAINTENANCE INSTRUCTIONS
CAUTION
PIBVEXP Explosion Proof
Post Indicator and Butterfly Valve Switch
3825 Ohio Avenue, St. Charles, Illinois 60174
1-800-SENSOR2, FAX: 630-377-6495
www.systemsensor.com
Specifications
Contact Ratings: One SPDT (Form C) Switch
15 A @ 125/250/480 VAC; 1/8 HP @ 125 VAC, 1/4 HP @ 250 VAC
1/2 A @ 125 VDC; 1/4 A @ 250 VDC
Dimensions: 3.75″L X 3.25″D X 4.5″H
Operating Temperature Range: –40°F - 160°F (–40°C – 71°C)
Maximum Stem Extension: 2.1875
″
Shipping Weight: 1-3/4 lb.
Enclosure Rating: UL Listed explosion proof switch enclosure for use in hazardous locations.
Class I, Groups C and D; Class II, Groups E. F and G
Important
Please Read Carefully and Save
This instruction manual contains important information
on the installation and operation of supervisory switches.
Purchasers who install supervisory switches for use by others must leave this manual or a copy of it with the user.
These instructions apply to System Sensor switches for post
indicator and butterfly type valves. Read all instructions
carefully before beginning. Follow only those instructions
that apply to the model being installed.
General Information for Post Indicator Valves and
Butterfly Valves
1. Model PIBVEXP is designed for installation in a
1
⁄2
″ NPT
tapped hole and located so that the actuating lever of the
switch engages the target or flag of the valve . The switch
actuating lever is spring loaded against the flag or target
of the valve and is released when the valve moves toward
the closed position from the fully open position.
2. Model PIBVEXP is equipped with a removable
1
⁄2″ NPT
pipe nipple which is locked in place with two set screws.
A hex wrench is provided for this feature. These models also
include an adjustable length actuating lever which elimi-
To prevent ignition of hazardous atmospheres, disconnect
nates any need for alteration of the length of the lever.
supply circuit before opening. Keep assembly tightly closed
when in operation. Do NOT leave unused wires exposed.
All supervisory switch installations must comply with local
codes and ordinances and the requirements of the authority having jurisdiction. Additional information is available
in National Fire Protection Association standards NFPA 13,
13D, 13R, 71, and 72.
D770-28-00 1 I56-1430-002R
Figures 1A and 1B:
Rising Flag
Falling flag
7. Screw the nipple hand tight into the
valve and tighten the locknut against the housing to
1
⁄2
″
hole in the
secure the nipple in position.
8. Insert a probe into the hole through the nipple to measure 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 actuating 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
conduit entry per Section 1. Apply pressure to the
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 assembly 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 actuating 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
downward for a rising flag application and pointing
upward for a falling flag application. An improper
installation can cause damage to the PIBVEXP
device.
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 assembly
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 contact the actuating lever of the PIBVEXP. Add
3
⁄32
″
to
this measurement and mark the outside of the housing at that location. Drill with a
1
a
⁄2
″
NPT thread.
23
⁄32
″
drill bit and tap
(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 contact
the actuating lever. Subtract
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.
5. Replace the head and target assembly.
6. Screw the locknut onto the threaded nipple which is
supplied with the PIBVEXP.
D770-28-00 2 I56-1430-002R
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
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 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
adequate 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.
NOTE: When removing the cover of the PIBVEXP use
provided allen wrench in box.
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,
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.
Figure 2:
T
O
O
P
E
N
CLOSE
CLOSE
W0244-00
Figure 3:
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.
NOTE: When removing the cover of the PIBVEXP use
provided allen wrench in box.
SUP. SWITCH SUP. SWITCH
TO NON-SILENCEABLE
INITIATING ZONE OF
LISTED FACP
W0245-00
TO POWER SOURCE
COMPATIBLE WITH BELL
W0246-00
END OF LINE
RESISTOR
TYPICAL FACP CONNECTION
LOCAL
BELL
TYPICAL LOCAL BELL CONNECTION
BREAK WIRE AS SHOWN FOR SUPERVISION
OF CONNECTION. DO NOT ALLOW STRIPPED
WIRE LEADS TO EXTEND BEYOND SWITCH
HOUSING. DO NOT LOOP WIRES.
W0247-00
D770-28-00 3 I56-1430-002R
WARNING
The Limitations of Supervisory Switch Alarm Devices
1. Alarms generated by the actuation of the activating lever
may not be received by a central station if telephone or
other communication lines to the alarm device are out of
3. Supervisory switches are not a substitute for insurance.
Building owners should always insure property and lives
being protected.
service, disabled, or open.
2. Supervisory switch alarm devices have a normal service life
of 10-15 years.
Please refer to insert for the Limitations of Fire Alarm Systems
Three-Year Limited Warranty
System Sensor warrants its enclosed supervisory switch to be free from
defects in materials and workmanship under normal use and service for a
period of three years from date of manufacture. System Sensor makes no
other express warranty for this supervisory switch. No agent, representa
tive, dealer, or employee of the Company has the authority to increase or
alter the obligations or limitations of this Warranty. The Company’s obliga
tion of this Warranty shall be limited to the repair or replacement of any
part of the supervisory switch which is found to be defective in materials
or workmanship under normal use and service during the three year period
commencing with the date of manufacture. After phoning System Sensor’s
toll free number 800-SENSOR2 (736-7672) for a Return Authorization
number, send defective units postage prepaid to: System Sensor, Returns
D770-28-00 4 I56-1430-002R
© System Sensor 2005
Department, RA #__________, 3825 Ohio Avenue, St. Charles, IL 60174.
Please include a note describing the malfunction and suspected cause
of failure. The Company shall not be obligated to repair or replace units
-
which are found to be defective because of damage, unreasonable use,
modifications, or alterations occurring after the date of manufacture. In no
-
case shall the Company be liable for any consequential or incidental dam
ages for breach of this or any other Warranty, expressed or implied what
soever, even if the loss or damage is caused by the Company’s negligence
or fault. Some states do not allow the exclusion or limitation of incidental
or consequential damages, so the above limitation or exclusion may not
apply to you. This Warranty gives you specific legal rights, and you may
also have other rights which vary from state to state.
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