D770-08-00 1 I56-0551-009R
EPS10 Series Alarm Pressure Switches
INSTALLATION AND MAINTENANCE INSTRUCTIONS
3825 Ohio Avenue, St. Charles, Illinois 60174
1-800-SENSOR2, FAX: 630-377-6495
www.systemsensor.com
IMPORTANT
Please Read Carefully and Save
This instruction manual contains important information about the installation
and operation of alarm pressure switches. Purchasers who install switches for
use by others must leave this manual or a copy of it with the user.
Read all instructions carefully before installation, following only those instruc-
tions that apply to the model you are installing.
Before installing any alarm device, be thoroughly familiar with:
NFPA 72: Installation, Maintenance, and Use of Protective Signaling Systems
NFPA 13: Installation of Sprinkler Systems
NFPA 13A: Inspection, Testing, and Maintenance of Sprinkler Systems
Other applicable NFPA standards, local codes, and the requirements of the
authority having jurisdiction.
Failure to follow these directions may result in failure of the device to report
an alarm condition. System Sensor is not responsible for devices that have
been improperly installed, tested, or maintained.
Do not use in potentially explosive atmospheres.Do not leave unused wires exposed.
SPECIFICATIONS
Contact Ratings: 10 A,
1
/2 HP @ 125/250 VAC
8 A, 125/250 VAC (LPCB only)
2.5A @ 6/12/24 VDC
Overall Dimensions: See Figure 1
Operating Temperature Range: –40° to +160°F
Maximum Service Pressure: 300 PSI
Maximum Adjustment Range: 4 – 20 PSI
Enclosure Rating: UL 4x — Indoor or Outdoor Use
NEMA 4 — Indoor or Outdoor Use
IP54
Approximate Differential: 3 PSI throughout range
OPERATION
As pressure changes, a diaphragm actuates 1 or 2 snap action switches. The
pressure switch actuation is determined by adjustment settings.
INSTALLATION
1. Remove Cover
Cover is held on by two tamper resistant screws. (Removal key is en-
closed with pressure switch.)
2. Mounting the Switch
The device is designed to be mounted in the upright or horizontal posi-
tion; side mounting is also acceptable. Locate it where vibration, shock,
and mechanical loading are minimal. Refer to piping diagram (Figure 2
on page 2).
a. Mount the device directly to the line via the
1
⁄2″
NPT pressure con-
nection. The use of teflon pipe sealant tape is recommended. Be
sure the fitting is tight enough to prevent leaks.
b. Apply tightening torque to the black plastic hex portion of device.
High voltage. Electrocution hazard. Do not handle live AC wiring or work on
a device to which AC power is applied. Doing so may result in severe injury
or death. When utilizing switches at voltages greater than 74 VDC or
49 VAC , means to provide all-pole disconnection must be incorporated in
the field wiring, such as a circuit breaker.
3. Wire the device in accordance with the National Electrical Code. Two
7
⁄8″
diameter conduit connection holes have been provided in the
mounting plate to accept standard
1
⁄2″
conduit fittings (one is remov-
able knock-out type). If a NEMA 4/UL 4x (waterproof unit) is re-
quired, waterproof flexible metallic conduit and appropriate conduit
fittings must be used. Recommended connectors are Thomas and
Betts PN 5332 (180° coupling), PN 5352 (90° coupling), and PN 5262
seal ring.
4. Connect wiring to terminals (see Figure 3 and Table 1).
FIGURE 1. PRESSURE SWITCH BASIC DIMENSIONS:
W0170-00
HEX
ADJUSTMENT
SCREW
MAIN ADJUSTMENT
WHEEL
4-1/4"
5-1/8"
LOCKING SCREW
1/2" NPT
COM
AB
GROUND
SCREW
(GREEN)
SWITCH #2
I56-0551-009R
TABLE 1. ELECTRICAL CONNECTIONS
(REFERENCED AT FACTORY SETTINGS):
MODEL EPS10-1
MODEL EPS10-2
A
COM
B
SWITCHES AT 0 P.S.I.
SWITCH AT 0 P.S.I.
SWITCH AT 4-8 P.S.I. (HIGH TRIP PT.)
B
COM
A
B
COM
A
B
COM
A
A
COM
B
A
COM
B
SWITCH 1 BOTH SWITCHES ACTIVATE SIMULTANEOUSLY
SW1 SW2
SW1 SW2
SWITCHES AT 4-8 P.S.I. (HIGH TRIP PT.)
(4 paginas)
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