EPS120-1

Model shall be an EPS120-1 or EPS120-2 pressure type waterfl ow 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 specifi ed 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 10200 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 fi tting 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 fi ttings 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.

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 psisystem. 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 psion decreasing pressure. The pressure adjustment wheel requires no special tools and does not aff ect switch synchronization on the EPS120-2.