System Sensor EPS10-1 and EPS10-2 Manual

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EPS10 Series Alarm Pressure Switches 3825 Ohio Avenue St Charles Illinois 60174 FAX 630 377 6495 AND MAINTENANCE INSTRUCTIONS Ratings Dimensions Temperature Range Service Pressure Adjustment Range Rating Differential A 1 2 HP 125 250 VAC A 125 250 VAC LPCB only 6 12 24 VDC Figure 1 to 160 PSI 4 20 PSI 4x Indoor or Outdoor Use 4 Indoor or Outdoor Use PSI throughout range 1 PRESSURE SWITCH BASIC DIMENSIONS SCREW 2 Mounting the Switch pressure changes a diaphragm actuates 1 or 2 snap action switches The switch actuation is determined by adjustment settings Remove Cover Cover is held on by two tamper resistant screws Removal key is en with pressure switch The device is designed to be mounted in the upright or horizontal posi side mounting is also acceptable Locate it where vibration shock mechanical loading are minimal Refer to piping diagram Figure 2 page 2 Mount the device directly to the line via the 1 NPT pressure con The use of teflon pipe sealant tape is recommended Be the fitting is tight enough to prevent leaks Apply tightening torque to the black plastic hex portion of device voltage Electrocution hazard Do not handle live AC wiring or work on device to which AC power is applied Doing so may result in severe injury death When utilizing switches at voltages greater than 74 VDC or VAC means to provide all pole disconnection must be incorporated in field wiring such as a circuit breaker ADJUSTMENT NPT Read Carefully and Save instruction manual contains important information about the installation operation of alarm pressure switches Purchasers who install switches for by others must leave this manual or a copy of it with the user all instructions carefully before installation following only those instruc that apply to the model you are installing installing any alarm device be thoroughly familiar with Wire the device in accordance with the National Electrical Code Two diameter conduit connection holes have been provided in the plate to accept standard 1 conduit fittings one is remov knock out type If a NEMA 4 UL 4x waterproof unit is re waterproof flexible metallic conduit and appropriate conduit must be used Recommended connectors are Thomas and PN 5332 180 coupling PN 5352 90 coupling and PN 5262 ring 72 Installation Maintenance and Use of Protective Signaling Systems Connect wiring to terminals see Figure 3 and Table 1 13 Installation of Sprinkler Systems 13A Inspection Testing and Maintenance of Sprinkler Systems 1 ELECTRICAL CONNECTIONS AT FACTORY SETTINGS applicable NFPA standards local codes and the requirements of the having jurisdiction EPS10 1 AT 0 P S I to follow these directions may result in failure of the device to report alarm condition System Sensor is not responsible for devices that have improperly installed tested or maintained AT 4 8 P S I HIGH TRIP PT AT 4 8 P S I HIGH TRIP PT EPS10 2 AT 0 P S I not use in potentially explosive atmospheres Do not leave unused wires exposed 1 SWITCHES ACTIVATE SIMULTANEOUSLY 2 TYPICAL PIPING DIAGRAM FOR EPS10 1 EPS10 2 TO ALARM CIRCUIT FIRE ALARM PANEL ALARM OFF SYSTEM Y 3 SWITCH TERMINALS Y ALARM OFF SYSTEM TO ALARM CIRCUIT FIRE ALARM PANEL TO ALARM CIRCUIT FIRE ALARM PANEL ALARM OFF SYSTEM Y 2 I T 1 number represents an approximate trip point change of 0.2 PSI full rotation changes the trip point setting by approximately 2.5 PSI reset differential of approximately 3 PSI is typical throughout the entire range of switch Retest the set point several times to ensure accuracy of setting Re seat locking screw 2 SETTINGS PSI Switch Switch 8 8 PSI diff PSI diff WIRE AS SHOWN FOR OF CONNECTION NOT ALLOW STRIPPED WIRE TO EXTEND BEYOND HOUSING DO NOT WIRES The sensor assembly is not field replaceable Do not attempt to disas these parts If you have any questions consult System Sensor Sensor recommends careful consideration of the following fac when specifying and installing Alarm Pressure Switches Always to the Installation and Maintenance Instruction for specific rec on individual devices before installing the unit TO FACTORY SETTINGS EPS10 1 and EPS10 2 devices are pre adjusted at the factory to alarm 4 PSI on rising pressure see Table 2 Pressure switch settings may be in the field to obtain a different pressure alarm response from 4 PSI 20 PSI The switch has an override feature on the adjustment mechanism to exceeding the 20 PSI max setting of the switch This override feature with it a tolerance band that may limit the upper adjustment to 16 Care must be used when setting the switch to ensure that the lower limit 4 PSI is not exceeded This will allow the switch to reset within the 3 PSI stated Install pressure switch as stated in portion of instruc manual Attach pressure test source to system Back off locking screw see Figure 1 to allow main adjustment wheel to freely Test trip point by slowly introducing pressure from the pressure test When trip point is found reduce pressure to zero Rotate main wheel counterclockwise to increase pressure and retest un switch trip point is at the desired pressure setting 4 PSI range Electrical ratings stated in literature and on nameplates should not be Overload on switch can cause failure on the first cycle Always wire according to national and local electrical codes units away from shock and vibration Proper electrical fittings should used to prevent moisture from entering the enclosure via the conduit Test all devices for proper operation after initial installation Perform pre maintenance and periodic testing as required by the applicable standards but not less than bimonthly Install a back up control for all critical applications where control failure endanger life or property A backup control to serve as a high or limit control is especially recommended for applications where a condition could result Do not mount unit where ambient temperatures will exceed published limits Avoid impact or mechanical loading refer to insert for the Limitations of Fire Alarm Systems LIMITED WARRANTY Sensor warrants its enclosed pressure switch to be free from defects in materials workmanship under normal use and service for a period of three years from date of System Sensor makes no other express warranty for this pressure switch agent representative dealer or employee of the Company has the authority to in or alter the obligations or limitations of this Warranty The Company obligation this Warranty shall be limited to the repair or replacement of any part of the pressure which is found to be defective in materials or workmanship under normal use service during the three year period commencing with the date of manufacture phoning Sys

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