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INSTALLATION AND MAINTENANCE INSTRUCTIONS
EPS40EXP and EPS120EXP Explosion Proof
Supervisory Pressure Switches
Specifications
Contact Ratings:
Operating Temperature Range:
Maximum Service Pressure (in PSI): 250
Adjustment Range:
Approximate Differential:
Enclosure Rating:
Hazardous Atmospheres
Classification:
Important
Please Read Carefully and Save
This instruction manual contains important information
about the installation and operation of supervisory pres-
sure 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 instructions that apply to the model you are in-
stalling.
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
Other applicable NFPA standards, local codes, and the re-
quirements 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.
D770-26-00
Technical Manuals Online! - http://www.tech-man.com
10 A, 1/2 HP @ 125/250 VAC
2.5A @ 6/12/24 VDC
–40° F to +160° F
EPS40EXP
EPS120EXP
250
10-100
10-200
3 PSI @ 10 PSI
3 PSI @ 10 PSI
8 PSI @ 100 PSI
9 PSI @ 200 PSI
NEMA Type 4 — Indoor/Outdoor use
Class I, Groups B, C, D, Div. 1
Class II, Groups E, F, G, Div. 1
Class III, Div. 1
Operation
As pressure changes, a diaphragm actuates 2 snap action
switches. The pressure switch actuation is determined by
adjustment settings.
Figure 1. Pressure switch basic dimensions:
COVER
1
3825 Ohio Avenue, St. Charles, Illinois 60174
1-800-SENSOR2, FAX: 630-377-6495
4.9"
LOCKING
SCREW
A Division of Pittway
HEX ADJUST
SCREW
1/4" HEX HEAD
COVER
TAMPER
SET SCREW
(WRENCH
PROVIDED)
ADJUSTMENT
WHEEL
9.5"
COVER
(WRENCH
PROVIDED)
MAIN ADJUSTMENT
WHEEL (TURN
COUNTERCLOSKWISE
TO INCREASE
PRESSURE)
1/2" NPT
I56-1428-000
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Summary of Contents for Pittway System Sensor EPS40EXP
- Page 1 INSTALLATION AND MAINTENANCE INSTRUCTIONS EPS40EXP and EPS120EXP Explosion Proof A Division of Pittway 3825 Ohio Avenue, St. Charles, Illinois 60174 Supervisory Pressure Switches 1-800-SENSOR2, FAX: 630-377-6495 Specifications Contact Ratings: 10 A, 1/2 HP @ 125/250 VAC 2.5A @ 6/12/24 VDC Operating Temperature Range: –40°...
- Page 2 Figure 2. Typical piping diagram for EPS40EXP Figure 3. Typical piping diagram for EPS120EXP WIRE TO SUPERVISORY WIRE TO ALARM EPS120EXP INDICATING CIRCUIT CIRCUIT OF FIRE ALARM PRESSURE CONTROL PANEL OF FIRE ALARM EPS40EXP EPS10EXP SUPPLY CONTROL PANEL SPRINKLER SYSTEM WATER BLEEDER PIPE...
- Page 3 Adjustments To Factory Settings NOTE: The sensor assembly is not field replaceable. Do not attempt to disassemble these parts. If you have Table 2. any questions, consult System Sensor. System Sen- sor recommends careful consideration of the fol- FACTORY SETTINGS (PSI) lowing factors when specifying and installing Alarm and Supervisory Pressure Switches.
- Page 4 Three-Year Limited Warranty System Sensor warrants its enclosed pressure switch to be free from de- ment, RA #__________, 3825 Ohio Avenue, St. Charles, IL 60174. Please fects in materials and workmanship under normal use and service for a include a note describing the malfunction and suspected cause of failure. period of three years from date of manufacture.
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