EPS10EXP Explosion Proof
Alarm Pressure Switch
INSTALLATION AND MAINTENANCE INSTRUCTIONS
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 instructions 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
Other applicable NFPA standards, local codes, and the require-
ments of the authority having jurisdiction.
Failure to follow these directions may result in failure of the
device to report an alarm condition. Safe Signal is not respon-
sible for devices that have been improperly installed, tested, or
maintained.
Operation
As pressure changes, a diaphragm actuates 2 snap action switch-
es. The pressure switch actuation is determined by adjustment
settings.
Specifications
Contact Ratings:
10 A, 1/2 HP @ 125/250 VAC
2.5 A @ 6/12/24 VDC
Operating Temperature Range:
–40° F to +160°F
Maximum Service Pressure:
250 PSI
Maximum Adjustment Range:
4 – 20 PSI
Enclosure Rating:
NEMA Type 4 — Indoor or/Outdoor Use
Hazardous Atmospheres Classification:
Class I, Groups B, C, D, Div. 1
Class II, Groups E, F, G, Div. 1
Class III, Div. 1
Approximate Differential:
3 PSI throughout range
Installation
1. Back out cover tamper set screw and remove cover (Fig. 1).
2. Mounting the Switch
The device is designed to be mounted in the upright or hori-
zontal position; side mounting is also acceptable.
Figure 1. Pressure switch basic dimensions:
WARNING
To prevent ignition of hazardous atmospheres, disconnect cir-
cuits before removing cover. Keep cover closed while circuits are
live. Conduit runs must have sealing fittings connected within
18” of the enclosure.
W0174-00
I56-1427-C
COVER
4.9"
9.5"
LOCKING
SCREW
HEX ADJUST
SCREW
1/4" HEX HEAD
COVER
TAM PER
SET SCREW
(WRENCH
PROVIDED)
ADJUSTMENT
WHEEL
COVER
(WRENCH
PROVIDED)
MAIN ADJUSTMENT
WHEEL (TURN
COUNTERCLOSKWISE
TO INCREASE
PRESSURE)
1/2" NPT
1
I56-1427-C
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