Owner's Manual

ManualsBrandsPOTTER ManualsPressure SwitchPOTTER PS120 (VdS) Supervisory Pressure Switch

MFG. #5401169 - REV B

09/12

PRINTED IN USA

PAGE 1 OF 8

PS120 (VdS)

SUPERVISORY PRESSURE SWITCH

Installation

The Potter PS120 Series Supervisory Pressure Actuated Switches are

designed primarily to detect an increase and/or decrease from normal system

pressure in automatic re sprinkler systems. Typical applications are: Wet

pipe systems with excess pressure, pressure tanks, air supplies, and water

supplies. The PS120 switch is factory set for 8,3 BAR (120 PSI) normal

system pressure. The switch marked with the word LOW is set to operate at

a pressure decrease of 0,7 BAR (10 PSI) at 7,6 BAR (110 PSI). The switch

marked with the word HIGH is set to operate at a pressure increase of 0,7

BAR (10 PSI) at 9 BAR (130 PSI). See section heading Adjustments and

Testing if other than factory set point is required.

1. Connect the PS120 to the system side of any shutoff or check valve.

2. Apply Teon tape to the threaded male connection on the device.

(Do not use pipe dope)

3. Device should be mounted in the upright position.

(Threaded connection down)

4. Tighten the device using a wrench on the ats on the device.

Wiring Instructions

1. Remove the tamper resistant screw with the special key provided.

2. Carefully place a screwdriver on the edge of the knockout and sharply

apply a force sufcient to dislodge the knockout plug. See Fig. 9

3. Run wires through an approved conduit connector and afx the

connector to the device. A NEMA-4 rated conduit tting is required

for outdoor use.

UL, cUL, and CSFM Listed, FM and LPC Approved, NYMEA

Accepted, CE Marked, VdS

Dimensions: 9.6cm (3.78")W x 8.1cm (3.20")D x 10.7cm (4.22")H

Conduit Entrance:

Two knockouts provided for 1/2" conduit.

Individual switch compartments and ground

screw suitable for dissimilar voltages

Enclosure: Cover- Die-cast with textured red powdercoat nish,

single cover screw and rain lip. Base- Die-cast

Pressure Connection: Nylon ½" NPT male

Factory Adjustment:

PS120-1 operates on decrease at 7,6 BAR (110 PSI)

PS120-2 operates in increase at 9 BAR

(130 PSI) and on decrease at 7,6 BAR (110 PSI)

Pressure Range: 1,7 - 12,1 BAR (25-175 PSI)

Differential: Typical 0,14 at 1,7 BAR (2 lbs. at 25 PSI)

55 at 12,1 BAR (8 lbs at 175 PSI)

Maximum System Pressure: 20,68 BAR (300 PSI)

Switch Contacts: SPDT (Form C)

10.1 Amps at 125/250VAC, 2.0 Amps at 30VDC

One SPDT in PS120-1, Two SPDT in PS120-2

Environmental Specications:

NEMA 4/IP66 Rated Enclosure - indoor or outdoor when

used with NEMA 4 conduit ttings.

Temperature range: -40°C to 60°C (-40°F to 140°F)

Tamper: Cover incorporates tamper resistant fastener that requires

a special key for removal. One key is supplied with

each device. For optional cover tamper switch kit, order

Stock No. 0090200. See bulletin #5401200 PSCTSK.

4. Connect the wires to the appropriate terminal connections for the

service intended. See Figures 2,4,5,6, and 8. See Fig. 7 for two switch

one conduit wiring.

Adjustment And Testing

The operation of the supervisory pressure switch should be tested upon

completion of installation and periodically thereafter in accordance with

the applicable NFPA codes and standards and/or the authority having

jurisdiction (manufacturer recommends quarterly or more frequently).

Note: Testing the PS120 may activate other system connected devices.

The use of a Potter BVL (see product bulletin 8900067 for details) is

recommended to facilitate setting and testing of the PS120 pressure switch.

When a BVL (bleeder valve) is used, the pressure to the switch can be

isolated and bled from the exhaust port on the BVL without effecting the

supervisory pressure of the entire system. See Fig. 3

The operation point of the PS120 Pressure Switch can be adjusted to any

point between 1,7 - 12,1 BAR (25 and 175 PSI) by turning the adjustment

knob(s) clockwise to raise the actuation point and counter clockwise to

lower the actuation point. In the case of the PS120-2, both switches operate

independent of each other. Each switch may be independently adjusted to

actuate at any point acrosss the switch adjustment range. Initial adjustment

can be made with a visual reference from the top of the adjustment knob

across to the printed scale on the switch bracket. Final adjustments should

be veried with a pressure gauge.

Service Use

Automatic Sprinkler NFPA-13

One or two family dwelling NFPA-13D

Residential Occupancy up to four stories NFPA-13R

National Fire Alarm Code NFPA-72

Potter Electric Signal Co., LLC • St. Louis, MO • Cust Service: 866-240-1870 • Tech Support:866-956-1211• Canada 888-882-1833 • www.pottersignal.com

Models:

PS120-1 (VDS)

PS120-2 (VDS)

firealarmresources.com

Summary of content (8 pages)

PAGE 1
PS120 (VdS) SUPERVISORY PRESSURE SWITCH UL, cUL, and CSFM Listed, FM and LPC Approved, NYMEA Accepted, CE Marked, VdS Dimensions: 9.6cm (3.78")W x 8.1cm (3.20")D x 10.7cm (4.22")H Conduit Entrance: Two knockouts provided for 1/2" conduit. Individual switch compartments and ground screw suitable for dissimilar voltages Enclosure: Cover- Die-cast with textured red powdercoat finish, single cover screw and rain lip.
PAGE 2
PS120 (VdS) SUPERVISORY PRESSURE SWITCH Dimensions Fig. 1 Switch Clamping Plate Terminal Fig. 2 GROUND SCREWS 2.87 [72.97] ADJUSTMENT KNOB NG MI CO IN 4.22 [107.19] 1/2" NPT 2.48 [62.87] 1.60 [40.64] NG OI TG OU DWG# 923-3 3.20 [81.28] 3.78 [95.89] NOTE: To prevent leakage, apply Teflon tape sealant to male threads only. An uninsulated section of a single conductor should not be looped around the terminal and serve as two separate connections.
PAGE 3
PS120 (VdS) SUPERVISORY PRESSURE SWITCH High Pressure Signal Connection Fig. 6 Low Pressure Signal Connection Fig. 5 TO FIRE ALARM PANEL TO FIRE ALARM PANEL EOLR EOLR DWG# 928-2 DWG# 928-1 Changing Pressure One Conduit Wiring Fig. 7 (With normal system pressure) Break out thin section of divider to provide path for wires when wiring both switches from one conduit entrance. Fig. 8 Terminal C: Common 1: Closed when installed under normal system pressure.
PAGE 4
PS120 (VdS) SUPERVISORY PRESSURE SWITCH • Installation must be performed by qualified personnel and in accordance with all national and local codes and ordinances. • Shock hazard. Disconnect power source before servicing. Serious injury or death could result. • Read all instructions carefully and understand thembefore starting installation. Save instructions for future use. • Failure to read and understand instructions could result in improper operation of device resulting in serious injury or death.
PAGE 5
PS120 (VdS) ÜBERWACHUNGS DRUCKSCHALTER UL-, cUL- und CSFM-gelistet, FM- und LPC-Zulassung, NYMEA-Zulassung, CE-Kennzeichnung, VdS Abmessungen: 9,6 cm (3,78") B x 8,1 cm (3,20") T x 10,7 cm (4,22") H Conduit Entrance: Zwei Ausbrechöffnungen für 1/2"-Kabelführungen vorhanden. Einzelne Schalterkammern und Erdungsschraube für unterschiedliche Spannungen geeignet. Gehäuse: Abdeckung - Druckguss mit strukturierter Pulverbeschichtung, mit einer Schraube befestigt und mit Regenschutz.
PAGE 6
PS120 (VdS) ÜBERWACHUNGS DRUCKSCHALTER Abmessungen: Abb. 1 Schalterverkabelung Platinenanschluss Abb. 2 ERDUNGSSCHRAUBEN D EN MM 2,87 [72,97] EINSTELLKNOPF O NK A 4,22 [107,19] 1/2" NPT 2,48 [62,87] D EN EH G AB 1,60 [40,64] 3,20 [81,28] 3,78 [95,89] Ein abisolierter Abschnitt eines einzelnen Leiters sollte nicht um die Anschlussklemme geschlungen werden, um ihn anstelle von zwei separaten Verbindungen zu verwenden. Das Kabel muss abgetrennt werden.
PAGE 7
PS120 (VdS) ÜBERWACHUNGS DRUCKSCHALTER Anschluss Für Hochdrucksignal Abb. 6 Anschluss Für Niederdrucksignal Abb. 5 ZUR FEUERALARMPLATINE ZUR FEUERALARMPLATINE EOLR EOLR Verkabelung Mit Einer Rohrleitung Schalterbetrieb Dünnen Bereich der Trennwand herausbrechen, um bei Verkabelung beider Schalter über eine Rohrleitungsöffnung die Kabel entsprechend verlegen zu können. Abb. 7 (bei normalem Systemdruck) NIEDERDRUCKSCHALTER Abb.
PAGE 8
PS120 (VdS) ÜBERWACHUNGS DRUCKSCHALTER • Die Installation muss von qualifiziertem Personal und entsprechend allen nationalen und lokalen Richtlinien und Bestimmungen durchgeführt werden. • Es besteht Stromschlaggefahr. Schalten Sie vor Wartungsarbeiten die Stromversorgung ab. Anderenfalls könnten Sie schwer verletzt oder getötet werden. • Lesen Sie vor Beginn der Installation alle Anweisungen sorgfältig durch. Bewahren Sie die Anweisungen zur künftigen Verwendung auf.