System Sensor PIBVEXP User Manual

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

⁄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

⁄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

⁄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

⁄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

⁄2

″

NPT mounting hole, remove the plug and go to step 6. If the post indicator valve is NOT equipped with a

⁄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

⁄32

″

to this measurement and mark the outside of the housing at that location. Drill with a

⁄2

″

NPT thread.

⁄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

⁄32

″

to this measurement and mark the outside of the housing at that location. Drill with a

⁄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

⁄5 of the full travel distance of the valve.

13. If the PIBVEXP does not change states within

⁄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

⁄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

⁄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.

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