BREAK WIRE AS SHOWN FOR
SUPERVISION OF CONNECTIO N.
DO NOT ALLOW STRIPPED WIRE
LEADS TO EXTEND BEYOND
SWITCH HOUSING. DO NOT
LOOP WIRES.
W0177-00
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.
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 position;
side mounting is also acceptable. Locate it where vibration,
shock, and mechanical loading are minimal. Refer to piping
diagram above (Figures 2 and 3).
a. Mount the device directly to the line via the 1/2
″
NPT pres-
sure connection. The use of teflon pipe sealant tape is rec-
ommended. Be sure the fitting is tight enough to prevent
leaks.
b. Apply tightening torque to the brass hex portion of the
device.
W0180-00
Figure 3. Typical piping diagram for EPS120EXP
DRY
PIPE
VALVE
OS & Y
VALVE
WATER
BY-PASS
TEST
VALVE
LOCAL ALARM
SHUT OFF
VALVE
WATER
MOTOR
GONG
CHECK
VALVE
EPS40EXP
CHECK
VALVE
AIR LINE
SHUT-OFF
VALVE
INSTALL
BLEEDER
VALVE FOR
TESTING
EPS10EXP
DRY SYSTEM
WIRE TO SUPERVISORY
CIRCUIT OF FIRE ALARM
CONTROL PANEL
WIRE TO ALARM
INDICATING CIRCUI
OF FIRE ALARM
CONTROL PANEL
TO
SPRINKLER
SYSTEM
Table 1. Electrical connections (referenced at
factory settings):
CAUTION
High voltage. Electrocution hazard. Do not handle live AC wir-
ing or work on a device to which AC power is applied. Doing so
may result in severe injury or death.
3. Wire the device in accordance with the National Electrical
Code. Two 1/2
″
NPT conduit entry holes have been provided
in the mounting base to accept explosion proof conduit fit-
tings. If necessary, remove conduit entry plug with 3/8”
square wrench.
4. Connect wiring to terminals (see Figure 4 and Table 1).
Adjustments To Factory Settings
WET
SYSTEM
ALARM
CHECK
VALVE
OS & Y
VALVE
OS & Y
VALVE
WATER
BY-PASS
VALVE
AIR
PRESSURE
SUPPLY
BLEEDER
TEST
VALVE
EPS120EXP
LOCAL ALARM
SHUT OFF
VALVE
RETARD
WATER
MOTOR
GONG
W0181-00
Figure 4. Switch location:
Figure 2. Typical piping diagram for EPS40EXP
SW2
SW1
SWITCHES AT NORMAL SYSTEM PRESSURE
SWITCHES AT LOW TRIP POINT
SW1
SW2
MODELS EPS40EXP, EPS120EXP
SWITCHES AT HIGH TRIP POINT
SW1
SW2
B
COM
A
B
COM
A
B
COM
A
A
COM
B
A
COM
B
A
COM
B
SWITCH # 1
COMMON
TERMINALS
TERMINAL
"A"
TERMINAL
"B"
SWITCH #2
GROUND
SCREW
(GREEN)
W0175-00
(HIGH SWITCH)
W0179s-00
2
I56-1428-C
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