System Sensor EPS10 Series Installation And Maintenance Instructions page 2

FIGURE 2. TYPICAL PIPING DIAGRAM FOR EPS10-1, EPS10-2
EPS10
WIRE TO ALARM
INDICATING CIRCUIT
EPS10EXP OF FIRE ALARM
CONTROL PANEL
TO
SPRINKLER
SYSTEM
WATER
MOTOR
GONG
WET
SYSTEM
ALARM
CHECK
RETARD
VALVE
WATER LOCAL ALARM
BY-PASS SHUT OFF
OS & Y
VALVE VALVE
VALVE
WET SYSTEM
FIGURE 3. SWITCH TERMINALS:
SWITCH #1
GROUND
SCREW
LOCKING
SCREW
ADJUSTMENTS TO FACTORY SETTINGS
Both EPS10-1 and EPS10-2 devices are pre-adjusted at the factory to alarm at 4–8
PSI on rising pressure (see Table 2). Pressure switch settings may be adjusted in the
field to obtain a different pressure alarm response from 4 PSI to 20 PSI. The switch
has an override feature on the adjustment mechanism to prevent exceeding the 20
PSI max. setting of the switch. This override feature carries with it a tolerance band
that may limit the upper adjustment to 16–20 PSI. Care must be used when setting
the switch to ensure that the lower limit of 4 PSI is not exceeded. This will allow the
switch to reset within the 3 PSI differential stated.
1. Install pressure switch as stated in "INSTALLATION" portion of instruction
manual. Attach pressure test source to system.
2. Back off locking screw (see Figure 1) to allow main adjustment wheel to rotate
freely.
3. Test trip point by slowly introducing pressure from the pressure test source.
When trip point is found, reduce pressure to zero. Rotate main adjustment
wheel (counterclockwise to increase pressure) and retest until switch trip point
is at the desired pressure setting (4–20 PSI range). Each number represents an
approximate trip point change of 0.2 PSI. One full rotation changes the trip
Please refer to insert for the Limitations of Fire Alarm Systems
System Sensor warrants its enclosed pressure switch to be free from defects in materials
and workmanship under normal use and service for a period of three years from date of
manufacture. System Sensor makes no other express warranty for this pressure switch.
No agent, representative, dealer, or employee of the Company has the authority to in-
crease or alter the obligations or limitations of this Warranty. The Company's obligation
of this Warranty shall be limited to the repair or replacement of any part of the pressure
switch which is found to be defective in materials or workmanship under normal use
and service during the three year period commencing with the date of manufacture.
After phoning System Sensor's toll free number 800-SENSOR2 (736-7672) for a Return
Authorization number, send defective units postage prepaid to: Honeywell, 12220 Rojas
TO
SPRINKLER
SYSTEM
WET
SYSTEM
ALARM
CHECK
VALVE
WATER
BY-PASS
OS & Y
VALVE
VALVE
COMMON
TERMINALS
TERMINAL "A"
SWITCH #2
TERMINAL "B"
BREAK WIRE AS SHOWN FOR
SUPERVISION OF CONNECTION.
DO NOT ALLOW STRIPPED WIRE
LEADS TO EXTEND BEYOND
SWITCH HOUSING. DO NOT
W0173-00
LOOP WIRES.
THREE-YEAR LIMITED WARRANTY
EPS10
WIRE TO ALARM
INDICATING CIRCUIT
EPS10EXP OF FIRE ALARM
CONTROL PANEL
WATER
MOTOR
GONG
RETARD
LOCAL ALARM
SHUT OFF
VALVE
WET SYSTEM
point setting by approximately 2.5 PSI. A reset differential of approximately 3
PSI is typical throughout the entire adjustment range of switch.
4. Retest the set point several times to ensure accuracy of setting.
5. Re-seat locking screw.
TABLE 2.
FACTORY SETTINGS (PSI)
MODEL
Fall
(Low Switch)
EPS10-1 —
EPS10-2 —
NOTE: The sensor assembly is not field replaceable. Do not attempt to disassemble
these parts. If you have any questions, consult System Sensor. System Sen-
sor recommends careful consideration of the following factors when specify-
ing and installing Alarm Pressure Switches. Always refer to the Installation
and Maintenance Instruction for specific recommendations on individual
devices before installing the unit.
• Electrical ratings stated in literature and on nameplates should not be exceeded.
• Overload on switch can cause failure on the first cycle. Always wire devices
according to national and local electrical codes.
• Install units away from shock and vibration. Proper electrical fittings should be
used to prevent moisture from entering the enclosure via the conduit.
• Test all devices for proper operation after initial installation. Perform preven-
tive maintenance and periodic testing as required by the applicable NFPA
standards but not less than bimonthly.
• Install a back-up control for all critical applications where control failure could
endanger life or property. A backup control to serve as a high or low limit
control is especially recommended for applications where a runaway condition
could result.
• Do not mount unit where ambient temperatures will exceed published limits.
• Avoid impact or mechanical loading.
Drive, Suite 700, El Paso TX 79936, USA. Please include a note describing the malfunc-
tion and suspected cause of failure. The Company shall not be obligated to repair or
replace units which are found to be defective because of damage, unreasonable use,
modifications, or alterations occurring after the date of manufacture. In no case shall the
Company be liable for any consequential or incidental damages for breach of this or any
other Warranty, expressed or implied whatsoever, even if the loss or damage is caused by
the Company's negligence or fault. Some states do not allow the exclusion or limitation of
incidental or consequential damages, so the above limitation or exclusion may not apply
to you. This Warranty gives you specific legal rights, and you may also have other rights
which vary from state to state.
2
WIRE TO ALARM
INDICATING CIRCUIT
EPS10 OF FIRE ALARM
CONTROL PANEL
TO
SPRINKLER
SYSTEM
CHECK
WATER
VALVE
DRY MOTOR
SYSTEM GONG
ALARM
CHECK
VALVE
WATER LOCAL ALARM
BY-PASS SHUT OFF
OS & Y
VALVE VALVE
VALVE
DRY SYSTEM
Approx. Rise Approx.
Reset (High Switch)
— 4 – 8 3 PSI diff.
— 4 – 8 3 PSI diff.
I56-0551-011R
©2016 System Sensor. 04-29
W0171-01
Reset