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INSTALLATION AND MAINTENANCE INSTRUCTIONS
EPS40 Series and EPS120 Series
Supervisory Pressure Switches
Specifications
Contact Ratings:
Overall Dimensions:
Operating Temperature Range:
Maximum Service Pressure:
Adjustment Range:
Enclosure Rating:
Approximate Differential:
Important
Please Read Carefully and Save
This instruction manual contains important information
about the installation and operation of supervisory 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, follow-
ing only those instructions that apply to the model you are
installing.
Before installing any alarm device, be thoroughly familiar
with:
NFPA 72: National Fire Alarm Code
NFPA 13: Installation of Sprinkler Systems
NFPA 25: Inspection, Testing, and Maintenance of Water-
based Fire Protection Systems
NFPA 13D: Standard for 1 and 2 Family Dwellings and
Manufactured Homes
NFPA 13R: Standard for Multi-family Dwellings
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.
D770-17-00
10 A, 1/2 HP @ 125/250 VAC
2.5A @ 6/12/24 VDC
See Figure 1
–40°F to +160°F
EPS40-1, EPS40-2:
EPS120-1, EPS120-2:
EPS40-1, EPS40-2:
EPS120-1, EPS120-2:
UL 4x — Indoor or Outdoor Use
NEMA 4 — Indoor or Outdoor Use
IP54
EPS40-1, EPS40-2:
EPS120-1, EPS120-2:
1
3825 Ohio Avenue, St. Charles, Illinois 60174
250 PSI
250 PSI
10-100 PSI
10-200 PSI
3 PSI at 10 PSI
6 PSI at 100 PSI
3 PSI at 10 PSI
9 PSI at 200 PSI
Do not use in potentially explosive atmospheres.
Do not leave unused wires exposed.
Operation
As pressure changes, a diaphragm actuates 1 or 2 snap
action switches. The pressure switch actuation is deter-
mined by adjustment settings.
Figure 1. Pressure Switch Basic Dimensions:
GROUND
SCREW
(GREEN)
5-1/8"
LOCKING SCREW
1-800-SENSOR2, FAX: 630-377-6495
www.systemsensor.com
CAUTION
4-1/4"
HEX
SWITCH #2
ADJUSTMENT
SCREW
MAIN ADJUSTMENT
WHEEL
1/2" NPT
I56-0986-005R
W0170-00
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Summary of Contents for System Sensor EPS40 Series
- Page 1 INSTALLATION AND MAINTENANCE INSTRUCTIONS EPS40 Series and EPS120 Series 3825 Ohio Avenue, St. Charles, Illinois 60174 Supervisory Pressure Switches 1-800-SENSOR2, FAX: 630-377-6495 www.systemsensor.com Specifications Contact Ratings: 10 A, 1/2 HP @ 125/250 VAC 2.5A @ 6/12/24 VDC Overall Dimensions: See Figure 1 Operating Temperature Range: –40°F to +160°F Maximum Service Pressure: EPS40-1, EPS40-2: 250 PSI EPS120-1, EPS120-2: 250 PSI Adjustment Range: EPS40-1, EPS40-2: 10-100 PSI EPS120-1, EPS120-2: 10-200 PSI Enclosure Rating: UL 4x — Indoor or Outdoor Use NEMA 4 — Indoor or Outdoor Use IP54 Approximate Differential: EPS40-1, EPS40-2: 3 PSI at 10 PSI...
- Page 2 Figure 2. Typical Piping Diagram for EPS40-1, Figure 3. Typical Piping Diagram for EPS120-1, EPS40-2 EPS120-2 WIRE TO ALARM WIRE TO SUPERVISORY INDICATING CIRCUIT CIRCUIT OF FIRE ALARM EPS120 CONTROL PANEL OF FIRE ALARM PRESSURE EPS40 EPS10 CONTROL PANEL SUPPLY SPRINKLER SYSTEM PIPE...
- Page 3 Adjustments to Factory Settings Figure 5. Adjustments (Dual-switch model shown): Switch 2 (Low Switch Switch 1 Table 2. EPSA40-2 and (High Switch FACTORY SETTINGS (PSI) EPSA120-2) EPSA40-2 and EPSA120-2; Low MODEL Fall SW2 Nominal Rise SW1 Switch EPSA40-1) Low Pressure (Low Switch) (Hi Switch) Adjusting...
- Page 4 • Install a back-up control for all critical applications • Install units away from shock and vibration. Proper where control failure could endanger life or property. electrical fittings should be used to prevent moisture A backup control to serve as a high or low limit con- from entering the enclosure via the conduit. trol is especially recommended for applications where a runaway condition could result. • Test all devices for proper operation after initial instal- lation. Perform preventive maintenance and periodic • Do not mount unit where ambient temperatures will testing as required by the applicable NFPA standards exceed published limits. but not less than bi-monthly. • Avoid impact or mechanical loading. Please refer to insert for the Limitations of Fire Alarm Systems Three-Year Limited Warranty System Sensor warrants its enclosed pressure switch to be free from Department, RA #__________, 3825 Ohio Avenue, St. Charles, IL 60174.
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