EPS120-1 and EPS120-2 Supervisory Pressure Switches System Sensor EPS120 Series switches are designed to supervise system air pressure in pipes or pressure tanks, as well as water or air pressure supplies of automatic water control valves. Features • Pressure adjustment wheel, no special tools required • Field-adjustable pressure sensitivity • Factory set for use in a nominal 115 psi system • Reinforced diaphragm resists pressure spikes • Two conduit entrances provided • NEMA 4 rated Agency Listings VdS S739 7770-1653:0117 3005863 G4020027 The EPS120-1 has a single SPDT switch. The EPS120-2 model contains two SPDT switches. The EPS120 Series features fieldadjustable pressure sensitivity to provide an alarm response between 10 and 200 psi. All models are factory set for use in a nominal 115 psi system. The EPS120-1 is factory set to respond at 105 psi at decreasing pressure. The EPS120-2 is factory set to respond at 125 psi on rising pressure and 105 psi on decreasing pressure. The pressure adjustment wheel requires no special tools and does not affect switch synchronization on the EPS120-2. EPS120 Series Specifications Architectural/Engineering Specifications Model shall be an EPS120-1 or EPS120-2 pressure-type waterflow switch as manufactured by System Sensor of St. Charles, IL. They shall be installed on the sprinkler system with connection as shown on the drawings and/or as specified herein. Pressure switches shall be of the bellows-activated type. Switches shall have a maximum service pressure rating of 300 psi and shall be adjustable from 10–200 psi. There shall be one (1) or two (2) SPDT contacts rated at 10.0 Amp @ 125/250 VAC and 2.5 Amp @ 6/12/24 VDC. The contractor shall furnish and install, where indicated on the plans, pressure switches according to appropriate NFPA standards. Switches shall be provided with a ½˝ NPT male pressure connection to be connected into the air supply line on the system side of any shut-off valve. Switches shall provide 1 knockout type and 1 open hole for ½˝ conduit fitting attachment and a ground screw provision for electrical grounding. The switch enclosure shall be weatherproof and carry a UL 4x/NEMA 4 rating when used with proper electrical fittings and conduit. The cover shall incorporate tamperresistant screws. The unit shall be listed by Underwriters Laboratories, Inc. and Underwriters Laboratories of Canada, Inc. and approved by Factory Mutual. Physical/Operating Specifications Maximum Operating Pressure Pressure Connection Maximum Adjustment Pressure Range Operating Temperature Range Factory Setting 300 psi ½” NPT male 10 to 200 psi Indoor or outdoor use −40°F to 160°F (−40°C to 71°C) EPS120-1 operates at decreasing pressure at 105 psi; EPS120-2 operates at increasing pressure at 125 psi and decreasing pressure at 105 psi EPS120-1: One set SPDT (Form C); EPS120-2: Two sets SPDT (Form C) 10.0 A, ½ HP @ 125/250 VAC 2.5 A @ 6/12/24 VDC Approximately 3 psi @ 10 psi, 9 psi @ 200 psi Rated UL 4x, NEMA 4 for indoor or outdoor use 5.120˝ H × 3.325˝ W × 4.250˝ L (13.0 cm × 8.4 cm × 10.8 cm) UL Models: Optional P/N 546-8000 ULC Models: Factory Installed Automatic Sprinkler: NFPA 13; One- or Two-Family Dwelling: NFPA 13D Residential Occupancies up to 4 Stories: NFPA 13R; National Fire Alarm Code: NFPA 72 1.2 lbs. (.54 Kg) 3 years Switch Contact Ratings Differential Enclosure Dimensions Cover Tamper Switch Service Use Shipping Weight Warranty Pressure Switch Basic Dimensions Typical Sprinkler Applications 41/4˝ EPS120 M A B CHECK VALVE MAIN ADJUSTMENT WHEEL LOCKING SCREW 1/2˝ SWITCH AT 105 P.S.I. (LOW TRIP PT.) B COM A OS & Y VALVE NPT CHECK VALVE WATER BYPASS TEST VALVE WATER MOTOR GONG LOCAL ALARM SHUT OFF VALVE DRY SYSTEM MODELS EPS120-2 SWITCHES AT 105 P.S.I. (LOW TRIP PT.) B B COM COM A A SW1 SW2 BLEEDER TEST VALVE SWITCHES AT 115 P.S.I. (NORMAL) B COM A SWITCH 1 DRY PIPE VALVE EPS120 MODELS EPS120-1 B COM A INSTALL BLEEDER VALVE FOR TESTING AIR LINE SHUT-OFF VALVE Electrical Connections SWITCH AT 115 P.S.I. (NORMAL) WIRE TO ALARM INDICATING CIRCUIT OF FIRE ALARM CONTROL PANEL EPS10 TO SPRINKLER SYSTEM HEX ADJUSTMENT SCREW SWITCH #2 51/8˝ SW1 B COM A SW1 B COM A OS & Y VALVE WATER MOTOR GONG WET SYSTEM ALARM CHECK VALVE SW2 SWITCHES AT 125 P.S.I. (HIGH TRIP PT.) B COM A OS & Y VALVE RETARD WATER BYPASS VALVE LOCAL ALARM SHUT OFF VALVE SW2 WET SYSTEM Ordering Information UL Model No. EPS120-1 EPS120-2 Replacement Parts S07-66-XX WFDW WIRE TO SUPERVISORY CIRCUIT OF FIRE ALARM CONTROL PANEL CO GROUND SCREW (GREEN) ULC/Canadian Model No. EPSA120-1 EPSA120-2 Description Low-pressure supervisory switch, one SPDT, 10–200 PSI High/low-pressure supervisory switch, two SPDT, 10–200 PSI Replacement tamper screws for cover of EPS Replacement tamper-proof wrench for cover of EPS 546-8000 3825 Ohio Avenue • St. Charles, IL 60174 Phone: 800-SENSOR2 • Fax: 630-377-6495 www.systemsensor.com Cover tamper switch for EPS Series ©2015 System Sensor. Product specifications subject to change without notice. Visit systemsensor.com for current product information, including the latest version of this data sheet. WFDS74201 • 2/15