System Sensor EPS10-1, EPS10-2 User Manual

INSTALLATION AND MAINTENANCE INSTRUCTIONS

CAUTION

WARNING

HEX ADJUSTMENT SCREW

MAIN ADJUSTMENT WHEEL

4-1/4"

5-1/8"

LOCKING SCREW

1/2" NPT

COM

GROUND SCREW (GREEN)

SWITCH #2

MODEL EPS10-1

MODEL EPS10-2

COM

SWITCHES AT 0 P.S.I.

SWITCH AT 0 P.S.I.

SWITCH AT 4-8 P.S.I. (HIGH TRIP PT.)

COM

SWITCH 1 BOTH SWITCHES ACTIVATE SIMULTANEOUSLY

SW1 SW2

SWITCHES AT 4-8 P.S.I. (HIGH TRIP PT.)

I56-0551-009R

EPS10 Series Alarm Pressure Switches

SPECIFICATIONS

Contact Ratings: 10 A, 1/2 HP @ 125/250 VAC 8 A, 125/250 VAC (LPCB only)

2.5A @ 6/12/24 VDC Overall Dimensions: See Figure 1 Operating Temperature Range: –40° to +160°F Maximum Service Pressure: 300 PSI Maximum Adjustment Range: 4 – 20 PSI Enclosure Rating: UL 4x — Indoor or Outdoor Use NEMA 4 — Indoor or Outdoor Use IP54 Approximate Differential: 3 PSI throughout range

FIGURE 1. PRESSURE SWITCH BASIC DIMENSIONS:

OPERATION

As pressure changes, a diaphragm actuates 1 or 2 snap action switches. The pressure switch actuation is determined by adjustment settings.

INSTALLATION

1. Remove Cover Cover is held on by two tamper resistant screws. (Removal key is en-

closed with pressure switch.)

2. Mounting the Switch

The device is designed to be mounted in the upright or horizontal posi-

tion; side mounting is also acceptable. Locate it where vibration, shock, and mechanical loading are minimal. Refer to piping diagram (Figure 2 on page 2).

a. Mount the device directly to the line via the 1⁄2″

nection. The use of teflon pipe sealant tape is recommended. Be sure the fitting is tight enough to prevent leaks.

b. Apply tightening torque to the black plastic hex portion of device.

3825 Ohio Avenue, St. Charles, Illinois 60174

1-800-SENSOR2, FAX: 630-377-6495

www.systemsensor.com

NPT pressure con-

IMPORTANT

Please Read Carefully and Save

This instruction manual contains important information about the installation and operation of alarm pressure switches. Purchasers who install switches for use by others must leave this manual or a copy of it with the user.

Read all instructions carefully before installation, following only those instructions that apply to the model you are installing.

Before installing any alarm device, be thoroughly familiar with:

NFPA 72: Installation, Maintenance, and Use of Protective Signaling Systems

NFPA 13: Installation of Sprinkler Systems

NFPA 13A: Inspection, Testing, and Maintenance of Sprinkler Systems

Other applicable NFPA standards, local codes, and the requirements of the authority having jurisdiction.

Failure to follow these directions may result in failure of the device to report an alarm condition. System Sensor is not responsible for devices that have been improperly installed, tested, or maintained.

Do not use in potentially explosive atmospheres.Do not leave unused wires exposed.

D770-08-00 1 I56-0551-009R

W0170-00

High voltage. Electrocution hazard. Do not handle live AC wiring or work on a device to which AC power is applied. Doing so may result in severe injury or death. When utilizing switches at voltages greater than 74 VDC or 49 VAC , means to provide all-pole disconnection must be incorporated in the field wiring, such as a circuit breaker.

3. Wire the device in accordance with the National Electrical Code. Two

⁄8″

diameter conduit connection holes have been provided in the

mounting plate to accept standard 1⁄2″

conduit fittings (one is removable knock-out type). If a NEMA 4/UL 4x (waterproof unit) is required, waterproof flexible metallic conduit and appropriate conduit fittings must be used. Recommended connectors are Thomas and Betts PN 5332 (180° coupling), PN 5352 (90° coupling), and PN 5262 seal ring.

4. Connect wiring to terminals (see Figure 3 and Table 1).

TABLE 1. ELECTRICAL CONNECTIONS (REFERENCED AT FACTORY SETTINGS):

WET SYSTEM ALARM CHECK VALVE

WET SYSTEM WET SYSTEM DRY SYSTEM

WIRE TO ALARM

FIGURE 2. TYPICAL PIPING DIAGRAM FOR EPS10-1, EPS10-2

COMMON

LOOP WIRES.

OS & Y VALVE

TO SPRINKLER SYSTEM

WATER

BY-PASS

VALVE

EPS10

EPS10EXP

INDICATING CIRCUIT OF FIRE ALARM CONTROL PANEL

LOCAL ALARM

SHUT OFF

VALVE

WATER MOTOR GONG

RETARD

FIGURE 3. SWITCH TERMINALS:

SWITCH #1

GROUND SCREW

LOCKING SCREW

COM

SWITCH #2

TERMINALS

TERMINAL “A”

TERMINAL “B”

SWITCH #2

WET SYSTEM ALARM CHECK VALVE

OS & Y VALVE

TO SPRINKLER SYSTEM

WATER

BY-PASS

VALVE

WATER MOTOR GONG

LOCAL ALARM

SHUT OFF

VALVE

RETARD

EPS10

EPS10EXP

INDICATING CIRCUIT OF FIRE ALARM CONTROL PANEL

DRY SYSTEM ALARM CHECK VALVE

OS & Y VALVE

TO SPRINKLER SYSTEM

CHECK VALVE

WATER

BY-PASS

VALVE

EPS10

LOCAL ALARM

Each number represents an approximate trip point change of 0.2 PSI. One full rotation changes the trip point setting by approximately 2.5 PSI. A reset differential of approximately 3 PSI is typical throughout the entire adjustment range of switch.

4. Retest the set point several times to ensure accuracy of setting.

5. Re-seat locking screw.

TABLE 2.

FACTORY SETTINGS (PSI)

MODEL

Fall

(Low Switch)

Approx.

Reset

Rise

(High Switch)

EPS10-1 — — 4 – 8 3 PSI diff.

EPS10-2 — — 4 – 8 3 PSI diff.

INDICATING CIRCUIT OF FIRE ALARM CONTROL PANEL

WATER MOTOR GONG

SHUT OFF

VALVE

W0171-01

Approx.

Reset

NOTE: The sensor assembly is not field replaceable. Do not attempt to disas-

BREAK WIRE AS SHOWN FOR SUPERVISION OF CONNECTION. DO NOT ALLOW STRIPPED WIRE LEADS TO EXTEND BEYOND SWITCH HOUSING. DO NOT

W0173-00

semble these parts. If you have any questions, consult System Sensor. System Sensor recommends careful consideration of the following factors when specifying and installing Alarm Pressure Switches. Always refer to the Installation and Maintenance Instruction for specific recommendations on individual devices before installing the unit.

ADJUSTMENTS TO FACTORY SETTINGS

Both EPS10-1 and EPS10-2 devices are pre-adjusted at the factory to alarm at 4–8 PSI on rising pressure (see Table 2). Pressure switch settings may be adjusted in the field to obtain a different pressure alarm response from 4 PSI to 20 PSI. The switch has an override feature on the adjustment mechanism to prevent exceeding the 20 PSI max. setting of the switch. This override feature carries with it a tolerance band that may limit the upper adjustment to 16–20 PSI. Care must be used when setting the switch to ensure that the lower limit of 4 PSI is not exceeded. This will allow the switch to reset within the 3 PSI differential stated.

1. Install pressure switch as stated in “INSTALLATION” portion of instruction manual. Attach pressure test source to system.

2. Back off locking screw (see Figure 1) to allow main adjustment wheel to rotate freely.

3. Test trip point by slowly introducing pressure from the pressure test source. When trip point is found, reduce pressure to zero. Rotate main adjustment wheel (counterclockwise to increase pressure) and retest until switch trip point is at the desired pressure setting (4–20 PSI range).

• Electrical ratings stated in literature and on nameplates should not be exceeded.

• Overload on switch can cause failure on the first cycle. Always wire devices according to national and local electrical codes.

• Install units away from shock and vibration. Proper electrical fittings should be used to prevent moisture from entering the enclosure via the conduit.

• Test all devices for proper operation after initial installation. Perform preventive maintenance and periodic testing as required by the applicable NFPA standards but not less than bimonthly.

• Install a back-up control for all critical applications where control failure could endanger life or property. A backup control to serve as a high or low limit control is especially recommended for applications where a runaway condition could result.

• Do not mount unit where ambient temperatures will exceed published limits.

• Avoid impact or mechanical loading.

Please refer to insert for the Limitations of Fire Alarm Systems

THREE-YEAR LIMITED WARRANTY

System Sensor warrants its enclosed pressure 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 pressure switch. No agent, representative, dealer, or employee of the Company has the authority to increase or alter the obligations or limitations of this Warranty. The Company’s obligation of this Warranty shall be limited to the repair or replacement of any part of the pressure 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, Return

D770-08-00 2 I56-0551-009R

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 damages for breach of this or any other Warranty, expressed or implied whatsoever, 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.