I56-0986-008R INSTALLATION AND MAINTENANCE INSTRUCTIONS EPS40 Series and EPS120 Series Supervisory Pressure Switches SPECIFICATIONS Contact Ratings: Overall Dimensions: Operating Temperature Range: Maximum Service Pressure: Adjustment Range: Enclosure Rating: Approximate Differential: 3825 Ohio Avenue, St. Charles, Illinois 60174 1-800-SENSOR2, FAX: 630-377-6495 www.systemsensor.com 10 A, 1/2 HP @ 125/250 VAC 8A @ 125/250 VAC ~ (LPCB ONLY) 2.5A @ 6/12/24 VDC See Figure 1 –40°F to +160°F EPS40-1, EPS40-2: 300 PSI EPS120-1, EPS120-2: 300 PSI EPS40-1, EPS40-2: 10-100 PSI EPS120-1, EPS120-2: 10-200 PSI UL 4x — Indoor or Outdoor Use NEMA 4 — Indoor or Outdoor Use IP54 EPS40-1, EPS40-2: 3 PSI at 10 PSI 6 PSI at 100 PSI EPS120-1, EPS120-2: 3 PSI at 10 PSI 9 PSI at 200 PSI IMPORTANT Please Read Carefully and Save WARNING 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. This instruction manual contains important information about the installation and operation of supervisory 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. 3.Wire the device in accordance with the National Electrical Code. Two 7/8″ 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 4 and Table 1). Adjustments to Factory Settings Before installing any alarm device, be thoroughly familiar with: NFPA 72: National Fire Alarm Code NFPA 13: Installation of Sprinkler Systems NFPA 25:Inspection, Testing, and Maintenance of Water-based Fire Protection Systems NFPA 13D: Standard for 1 and 2 Family Dwellings and Manufactured Homes NFPA 13R: Standard for Multi-family Dwellings 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. FIGURE 1. PRESSURE SWITCH BASIC DIMENSIONS: 4-1/4" CAUTION Do not use in potentially explosive atmospheres.Do not leave unused wires exposed. M CO A OPERATION As pressure changes, a diaphragm actuates 1 or 2 snap action switches. The pressure switch actuation is determined by adjustment settings. SWITCH #2 INSTALLATION 1. Remove Cover Cover is held on by two screws. 2. Mounting the Switch The device is designed to be mounted in the upright position; side mounting is also acceptable. Locate it where vibration, shock, and mechanical loading are minimal. Refer to piping diagram above (Fig. 2 and 3). a.Mount the device directly to the line via the 1⁄2" NPT pressure connection. 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 the device. B GROUND SCREW (GREEN) HEX ADJUSTMENT SCREW 5-1/8" LOCKING SCREW MAIN ADJUSTMENT WHEEL 1/2" NPT W0170-00 D770-17-00 1 I56-0986-008R FIGURE 2. TYPICAL PIPING DIAGRAM FOR EPS40-1, EPS40-2 EPS40 CHECK VALVE WIRE TO SUPERVISORY CIRCUIT OF FIRE ALARM CONTROL PANEL TO SPRINKLER SYSTEM DRY PIPE VALVE INSTALL BLEEDER VALVE FOR TESTING EPS10 CHECK VALVE AIR LINE SHUT-OFF VALVE AIR PRESSURE SUPPLY LOCAL ALARM SHUT OFF VALVE DRY SYSTEM OS & Y VALVE C0141-01 TABLE 2. MODEL EPS40-1 EPS40-2 EPS120-1 EPS120-2 SINGLE-SWITCH MODEL — EPS40-1 AND EPS120-1 1.Install pressure switch as stated in “INSTALLATION” portion of instruction manual. Attach pressure test source to system. 2.Back off locking screw (see Fig. 4) to allow main adjustment wheel to rotate freely. 3.Test the switch for the set point by introducing 40 PSI pressure from the pressure test source for the EPS40-1 (115 PSI for the EPS120-1). Decrease pressure slowly until the switch trips. Rotate main adjustment wheel, Figure 5, (counterclockwise to increase pressure) and retest by first introducing a higher pressure than desired and slowly reducing pressure until the switch trips. Repeat process until switch trip point is at desired pressure setting. Each number represents an approximate trip point change of 1.8 PSI for the EPS40-1 and 6.6 PSI for the EPS120-1. For each 1/2 rotation of the adjustment wheel, the trip point setting changes by approximately 11 PSI for the EPS40-1 and 40 PSI for the EPS120-1. 4. Retest the set point several times to ensure accuracy of setting. 5. Re-seat locking screw. FIGURE 4. SWITCH LOCATION: COMMON TERMINALS TERMINAL “A” SWITCH #2 M CO A 2 H# ITC WATER MOTOR GONG WET SYSTEM ALARM CHECK VALVE OS & Y VALVE RETARD WATER BY-PASS VALVE LOCAL ALARM SHUT OFF VALVE C0142-01 DUAL-SWITCH MODEL — EPS40-2 AND EPS120-2 1.Install pressure switch as stated in “INSTALLATION” portion of instruction manual. Attach pressure test source to system. 2.Back out the locking screw (see Fig. 4) to allow main adjustment wheel to turn freely. 3. Option 1: Adjust nominal pressure setting without affecting PSI window. a) Adjust main adjustment wheel (see Fig. 5) to desired setting using pressure source (i.e., valve or air maintenance device). b) Turn main adjustment wheel counterclockwise to increase (see arrow on mounting base) or clockwise to decrease pressure. Each number on main adjust wheel represents an approximate window shift of 1.8 psi for EPS40-2 and 6.6 psi for EPS120-2. For each 1/2 rotation of the adjustment wheel the window changes by approximately 11 psi for EPS40-2 and 40 psi for EPS120-2. c) Retest the set point several times to ensure the accuracy of the setting. Option 2: Adjust pressure window size and nominal setting of pressure window. a) Adjust main adjustment wheel (see Fig. 5) until high switch (SW1) trips at desired pressure using pressure test source (valve or air maintenance device). b) Refer to step B from Option 1. c) Decrease pressure until the low switch trips (SW2). d) Adjust 1/4˝ low pressure hex head nut (see Fig. 5) to either increase (counterclockwise) or decrease (clockwise) the window size (the low switch will be affected). e) The approximate sensitivity of the hex screw adjustment: 1/2 turn =5 psi. A maximum of 30 psi is attainable. 4.Retest the set points several times to ensure the accuracy of the settings, and adjust as necessary. 5. Re-seat locking screw. NOTE: EPS40 models are able to be set to a range within 8-100psi only when used with Victaulic series 768 and 769 FireLock NXT valves pre-set for use with low pressure actuators. When used on Victaulic series 768 and 769 FireLock NXT all units must be 100% tested to verify pressure setting. Both the main adjustment wheel and low pressure adjusting screw (See Figure 5) need to be customer set and tested to insure proper functionality. For pressure setting instructions refer to Installation section for dual switch models in this manual. FACTORY SETTINGS (PSI) Fall SW2 Nominal Rise SW1 (Low Switch) (Hi Switch) 30± 1.5 40 –– 40 50± 2.5 30± 1.5 115 –– 101.5 - 112.5 101.5 - 112.5 115 117.5 - 128.5 SWITCH #1 EPS120 BLEEDER TEST VALVE WATER MOTOR GONG WATER BY-PASS TEST VALVE OS & Y VALVE FIGURE 3. TYPICAL PIPING DIAGRAM FOR EPS120-1, EPS120-2 WIRE TO ALARM INDICATING CIRCUIT OF FIRE ALARM CONTROL PANEL SW B TERMINAL “B” TABLE 1. ELECTRICAL CONNECTIONS (REFERENCED AT FACTORY SETTINGS): MODELS EPS40-1, EPS120-1 GROUND SCREW SWITCH AT NORMAL SYSTEM PRESSURE B COM A LOCKING SCREW SWITCH AT TRIP POINT B COM A SWITCHES AT NORMAL SYSTEM PRESSURE B COM A B COM A SW1 SWITCH 1 BREAK WIRE AS SHOWN FOR SUPERVISION OF CONNECTION. DO NOT ALLOW STRIPPED WIRE LEADS TO EXTEND BEYOND SWITCH HOUSING. DO NOT LOOP WIRES. W0185-01 D770-17-00 MODELS EPS40-2, EPS120-2 SWITCHES AT LOW TRIP POINT B B COM COM A A SW1 SW2 SW2 SWITCHES AT HIGH TRIP POINT B COM A B COM A SW1 SW2 W0186-00 2 I56-0986-008R FIGURE 5. ADJUSTMENTS (DUAL-SWITCH MODEL SHOWN): NOTE: The sensor assembly is not field replaceable. Do not attempt to disassemble these parts. If you have any questions, consult System Sensor. System Sensor recommends careful consideration of the following factors when specifying and installing Alarm and Supervisory Pressure Switches. Always refer to the Installation and Maintenance Instruction for specific recommendations on individual devices before installing the unit. Switch 2 (Low Switch EPS40-2 and EPS120-2) Low Pressure Adjusting Screw 1/4" Hex Head (Not Present in Single Switch Models) • 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. Switch 1 (High Switch EPS40-2 and EPS120-2; Low Switch EPS40-1) Main Adjusting Wheel (Turn Counterclockwise to Increase Pressure) NOTE: Each 1/2 turn of Low Pressure adjsuting screw adjusts pressure approximately 5 psi. Turn counter clockwise to increase pressure. Turn clockwise to decrease pressure. Each 1/2 turn of High Pressure adjusting wheel adjusts pressure 11 psi on the EPS40-2 and 40 psi on the EPS120-2. • 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. W0144-02 • Do not mount unit where ambient temperatures will exceed published limits. • Avoid impact or mechanical loading. D770-17-00 3 I56-0986-008R 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 D770-17-00 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. 4 I56-0986-008R © System Sensor 2014