EPSA120-1

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 The EPS120-1 has a single SPDT switch while the EPS120-2 model contains two SPDT switches. The EPS120 Series features field adjustable 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 while 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. Agency Listings VdS S739 CS169 7770-1209:147 3005863 167-93-E G4020027 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 250 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 250 psi Differential Approximately 3 psi @ 10 psi, 9 psi @ 200 psi Pressure Connection 1/2” NPT male Enclosure Rated UL 4x, NEMA 4 for indoor or outdoor use Maximum Adjustment Pressure 100 to 200 psi Dimensions 5.12˝ H × 3.325˝ W × 4.250˝ L Range (13.0 cm × 8.4 cm × 10.8 cm) Operating Temperature Range Indoor or outdoor use Cover Tamper Switch UL Models: Optional P/N 546-8000 –40°F to 160°F (–40°C to 71°C) ULC Models: Factory Installed Factory Setting EPS120-1 operates at decreasing Service Use Automatic Sprinkler: NFPA 13 pressure at 105 psi EPS120-2 operates One or Two Family Dwelling: NFPA 13D at increasing pressure at 125 psi and Residential Occupancies up to 4 Stories: NFPA 13R decreasing pressure at 105 psi National Fire Alarm Code: NFPA 72 Switch Contact Ratings EPS120-1: One set SPDT (Form C) Shipping Weight 1.2 lbs. (.54 Kg) EPS120-2: Two sets SPDT (Form C) Warranty 3 years 10.0 A, 1/2 HP @ 125/250 VAC 2.5 A @ 6/12/24 VDC Pressure Switch Basic Dimensions 4 41/ ″ Electrical Connections MODELS EPS120-1 SWITCH AT 115 P.S.I. (NORMAL) MODELS EPS120-2 SWITCHES AT 105 P.S.I. (LOW TRIP PT.) B B COM COM A A SW1 SW2 SWITCHES AT 115 P.S.I. (NORMAL) B COM A SW1 SWITCH 1 B COM A SW2 B COM A SWITCH AT 105 P.S.I. (LOW TRIP PT.) B COM A GROUND SCREW (GREEN) CO M A SWITCH #2 B HEX ADJUSTMENT SCREW 51/8″ MAIN ADJUSTMENT WHEEL LOCKING SCREW 1 2″ / SWITCHES AT 125 P.S.I. (HIGH TRIP PT.) B COM A SW1 B COM A SW2 NPT Typical Sprinkler Applications EPS120 WIRE TO SUPERVISORY CIRCUIT OF FIRE ALARM CONTROL PANEL TO SPRINKLER SYSTEM INSTALL BLEEDER VALVE FOR TESTING CHECK VALVE BLEEDER TEST VALVE WATER MOTOR GONG WET SYSTEM ALARM CHECK VALVE WATER BY-PASS VALVE EPS10 WIRE TO ALARM INDICATING CIRCUIT OF FIRE ALARM CONTROL PANEL EPS120 CHECK VALVE AIR LINE SHUT-OFF VALVE DRY PIPE VALVE WATER MOTOR GONG RETARD OS & Y VALVE WATER BY-PASS TEST VALVE LOCAL ALARM SHUT OFF VALVE OS & Y VALVE OS & Y VALVE LOCAL ALARM SHUT OFF VALVE DRY SYSTEM WET SYSTEM Ordering Information UL Model No. EPS120-1 EPS120-2 Replacement Parts S07-66-XX WFDW 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 546-8000 Cover tamper switch for EPS Series Replacement tamper screws for cover of EPS Replacement tamper proof wrench for cover of EPS 3825 Ohio Avenue • St. Charles, IL 60174 Phone: 800-SENSOR2 • Fax: 630-377-6495 ©2007 System Sensor. Product specifications subject to change without notice. Visit systemsensor.com for current product information, including the latest version of this data sheet. A05-0939-005 • 4/07 • #1676