Pentair ST9 Quick Start Manual

Thank you for purchasing another fine product from Pentair Aquatic
Eco-Systems. This flow switch will give excellent service for many years.
Inspect the switch upon receipt for physical damage and completeness.
Call us when shipping container appears undamaged and parts are missing.
Call the shipper if parts have been damaged in shipment or if container
appears to have been opened during shipment and parts are missing.
Electrical Specifications
and electrical switches are rated at 115V and 230V @ 25 amps.
ST9 ST11
The electrical switch is rated at 115V @ 10 amps.
ST12
Features
1. Threaded electrical " female conduit sockets on all switches.
1 / 2
2. All switches are saltwater compatible.
3. All switches have adjustable settings.
4. Each flow switch has a removable cover for ease of wiring, servicing
and calibration, if necessary.
5. Switches are rated to handle line pressure of up to 60 psi.
6. Switches can handle liquids up to 110ºF in continuous operation.
7. All switches are fitted with standard PVC slip fittings.
8. All flow switch wetted surfaces are made from one of the following:
PVC, polypropylene, Buna N or stainless steel.
Cautions
1. Flow switches must be installed in a horizontal, level position.
2. Switches are factory-set at the safest, lowest set point gpm.
3. Do not screw down the calibration set screw (see diagram), as this may
cause the flow switch to stick in the ON position.
4. Use the flow switches in filtered liquids ONLY.
5. Install a filter or strainer before the switch to prevent sand and foreign
objects from interfering with operation.
2395 Apopka Blvd. • Apopka, FL 32703 • Phone: 877-347-4788 • Fax: 407-886-6787 • PAES.General@Pentair.com • PentairAES.com
Flow Switches
(Part Nos. ST9–ST11)
Mechanical Specifications
ST9
ST11
ST12
Switch Installation Procedure
NOTE: Each flow switch is marked "Flow In" and "Flow Out" on the housing.
1. For proper operation, flow switches must be installed horizontally and in
2. Make sure the directional arrow is pointing in the same direction that the
3. Use an I.A.P.M.O., NSF or ATSM approved or listed PVC cement.
4. The
Electrical Connection
1. Remove cover by unscrewing the three screws.
2. Use push-on, quick female disconnect terminals (0.032 x 0.250)
3. Route all wires to the top of the switch to prevent wires from interfering
4. Replace cover and hand tighten the three cover screws.
NOTE: N.O. = Normally Open (Load) Terminal. Connect to power "IN" on
device to be switched if you want this device to be energized when water
flows through the flow switch at its set point.
: 1 " PVC slip socket
1 / 2
: 2" PVC slip socket
: 1" PVC slip socket
a level position. Do not cock to one side and keep the removable cover
on the top.
fluid will be flowing. The fluid can only travel in one direction due to the
anti-surge check valve incorporated within the flow switch.
Follow manufacturer's instructions.
" sockets are provided to accept either a cord grip restraint or
1 / 2
flex conduit. Check local or national electric codes for your application.
Do not use ridged conduit.
to attach wires.
with the switch operation.