EPS40-1 AND EPS40-2
Supervisory Pressure
Switches
System Sensor EPS40 Series switches are designed for
use in dry pipe systems or pressure tanks and water
pressure supplies of automatic water control valves.
Features
• Sensitivity adjustment wheel, no special tools required
• Reinforced diaphragm resists pressure spikes
• Two conduit entrances
• Both one- and two-switch models available
Agency Listings
The EPS40-1 has a single SPDT switch while the EPS40-2 model
contains two SPDT switches. The EPS40 Series features field
adjustable pressure sensitivity to provide an alarm response between
10 and 100 psi. All models are factory set for use in a nominal 40 psi
system. The EPS40-1 is factory set to respond at 30 psi at decreasing
pressure while the EPS40-2 is factory set to respond at 50 psi on
rising pressure and 30 psi at decreasing pressure. The pressure
adjustment wheel requires no special tools and does not affect
switch synchronization on the EPS40-2. The EPS40-1 and EPS40-2
supervisory pressure switches are NEMA 4 rated.
118f/01
S739
0X0A7.AY
CS169
VdS
G4020028
7770-1209:147
167-93-E
Specifications, EPS40-1 and EPS40-2
Architectural/Engineering Specifications EPS40-1 (SPDT), EPS40-2 (2/SPDT)
Model shall be an EPS40-1 or EPS40-2 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 – 100 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
tamper-resistant screws. The unit shall be listed by Underwriters Laboratories, Inc., the California State Fire Marshal, MEA, CSFM, LPCB, VdS and approved by
Factory Mutual.
SYSTEMSENSOR [ SYSTEMSENSOR ADVANCED IDEAS. ]
