PCS
PUMP CONTROL SWITCH
MFG. #5401143 - REV G
10/07
PRINTED IN USA
PAGE 1 OF 2
UL Listed, CSA Approved, and CE Marked
Listing/Approvals:
UL Standard 508 Guide (NKPZ) and CSA Standard
C22.2 No. 14-M Class (321106) for Pressure Operated Industrial
Control Equipment.
UL Standard 873 Guide (XAPX) for Temperature Indicating and
Regulating Equipment.
CE
Marked
Ambient/Media Temperature Range:
40°F to 140°F (4.5°C to 60°C)
Construction:
• NEMA Type 4X Enclosure for indoor or outdoor use.
(To maintain 4X rating, use appropriate Type 4 conduit hub.)
• Forged Brass Pressure Connections
• Aluminum Diecast Base with Polymer Enclosure
• Beryllium Copper
• Nitrile Pressure Sealing O-ring
Switch Contact:
15
Amps
@125
VAC
Resitive
1/2 HP @ 125 VAC
Potter Electric Signal Company • 2081 Craig Road, St. Louis, MO, 63146-4161 • Phone: 800-325-3936/Canada 888-882-1833
• www.pottersignal.com
Adjustable
Operating Range
Minimum
Deadband
Proof
Pressure
Factory
Setting
25-300 PSIG
12 PSIG
400 PSIG
90/60 PSIG
Direct control of motors with HP ratings greater than those shown
could damage the PCS switch, resulting in sprinkler system damage
and unintentional water flow. The installation of a pressure relief
valve set at or below the system's maximum operating pressure
is recommended.
General
The model PCS is a Pump Control Switch with independent set and
reset points which are adjustable throughout the entire operating range
of the switch. The minimum deadband (minimum span between set
and reset points) may be obtained at any point in the operating range
of the switch. When the pressure drops below the setting, a snap action
switch closes energizing the built in pump control relay and turns the
pump on. When the pressure increases above the high setting, the snap
action switch opens de-energizing the built in pump control relay and
turns the pump off.
This control device is designed for use as an operating control in
applications sensing air, water, or any fl uid not harmful to the pressure
connection, diaphragm or nitrile pressure-sealing o-ring. Where an
operating control would result in personal injury and/or loss of property, it
is the responsibility of the installer to add devices (safety, limit controls)
that protect against, or systems (alarm, supervisory systems) that warn
of control failure.
This device is not intended for applications in explosive environments
or use with hazardous fl uids.
PCS-300-1B Stock number 1370080
Mounting and Installation
The Model PCS is typically mounted in an upright position on a fl at
surface by two 1/4" screws through the mounting fl anges on the base or
by two 1/4-20 screws into the back of the base. See Fig. 1 for mounting
dimensions. Locate the switch where vibration, shock and ambient
temperature fl uctuations are minimal. To avoid damage to the switch,
always hold a wrench on the pressure connection hex when tightening
pressure connections. Never tighten the pressure connection by turning
the switch housing into the fi tting.
(2) 1/4-20 x .50 DEEP
THREADED HOLES
FOR BACK MOUNTING
OPTION
DIE CAST BOX CONNECTOR
(2) .266 MOUNTING
THRU HOLES FOR
1/4” SCREWS
DWG #1143-4
Fig. 1
