MODEL PS10-EXF
EXPLOSION PROOF
PRESSURE SWITCH
PRINTED IN USA
MKT. #5401029 - REV K
7/07
PAGE 3 OF 3
Note:
To prevent leakage, apply tefl on tape sealant to male threads only.
Use of pipe joint cement may result in obstruction of the aperature
and loss of signal.
When this device is to be installed in an area that is classifi ed as
“hazardous”, the person responsible for safety in the area should be
contacted to determine if the tools and operations required for the
installation of the device and associated components are permitted in the
area. To reduce the risk of ignition of hazardous atmospheres, disconnect
supply circuits before opening cover. Keep cover tight while circuits are
live. Cover screws must be torqued to a minimum of 2 N-m.
Engineer/Architect Specifi cations
Air pressure supervisory switch shall be a Model PS40-EXF as manufactured by Potter Electric Signal Co. of St. Louis, Mo. U.S.A. and shall be
installed on the sprinkler systems as shown on the drawings and/or as specifi ed herein.
Switches shall be provided with a 1/2" NPT male pressure connection to be connected into the air supply line on the system side of any shut-off
valve. A Model BVL bleeder valve as supplied by Potter Electric Signal Co. of St. Louis, Mo. U.S.A., or equivalent, shall be connected between
the product and the air supply to provide a means of testing the operation of the supervisory switch.
The switch unit shall contain two SPDT (Form C) switches. One switch shall operate at a pressure decrease of 69 kPA/.69 BAR (10 PSI) from
normal. The second switch shall operate at a pressure increase of 69 kPA/.69 BAR (10 PSI) from normal. Switch contacts shall be rated at 15.0
Amps at 125/250 VAC and 2.0 Amps at 30 VDC. The units shall have a maximum pressure rating of 1724 kPA/17.24 BAR (250 PSI) and shall
be adjusted from 69kPA/.69 BAR (10 PSI) to 1207 kPA/12.07 BAR (175 PSI).
The switch housing shall be weatherproof and oil resistant.
