Emerson Pressure Washer PS3 User Manual

Pressure Switch

D A T A S H E E T

The ALCO PS3 is a Pressure Switch with fixed switch-point
settings.

Features

• Maximum Operating Pressure up to 43 bar

• Test Pressure up to 48 bar

• Standard factory settings from stock in small volumes

• High and low pressure switches

• High temperature version with snubber for direct

compressor mounting (Range 6)

• Direct mounting reduces the number of joints and thus

avoiding potential leakage

• Precise setting and repeatability

• IP 65 protection if used with the new PS3-Nxx and PS3-

Lxx cables with plug (acc. EN 175301-803), no additional
gasket required (molded into plug)

• Customer specific versions in multipacks, minimum order

quantity 100 Stück

Options

• For direct mounting on a pressure connection (free

standing) or with a capillary tube

• Direct compressor head mounting with high temperature

bellows and snubber:

- reduces the number of joints

- avoids potential leakage

- saves high cost of flexible hose

• TÜV approved versions for high and low pressure

• Micro-switch for narrow pressure differentials

• Gold plated contacts for low voltage/current applications

• Cables with plug PS3-Nxx/PS3-Lxx not included; to be

ordered separately (see page 8 for details)

PS3

Alco Controls

PS3

Standards

per Low Voltage Directive

per PED Directive 97/23/EC, TÜV appr. versions only

Manufactured and tested to standards on our own

responsibility

Underwriter Laboratories

Introduction

PS3 are equipped with a SPDT snap action contact, switching
from 1-2 to 1-4 on rising pressure and from 1-4 to 1-2 on falling
pressure (see diagram). The PS3 is factory preset according to
customers specification and is not adjustable. Several models
are available:

• Low pressure switch, with automatic or manual reset

• High pressure switch, with automatic or manual reset

• TÜV approved safety high pressure limiter with automatic

reset

• TÜV approved safety high pressure cut-out, with internal or

external manual reset

TÜV approval for pressure switches can be reached either by
using a double diaphragm (Pressure range 1-5) which acts in a
fail-safe mode or by a single pressure element (Bellows,
Pressure range 6) which is able to resists to > 2 Mio. cycles
between 50% and 100% of the maximum operating pressure
(see 4.6.1 of EN 12263).

PS3__35003_EN_R08.doc 1 / 10 09.08.2011

single diaphragm double diaphragm

bellows (pressure range 6)

Technical data

PS3

Alco Controls

Pressure Switch

D A T A S H E E T

Pressure sensing element

Type of

diaphragm

Standard

temperature Double diaphragm Bronze no 1-5 Yes B,S,W A,K,L,S,U,X

High

temperature steel 6 no A,R S,U,X

*) see page 7 for more details.

Note: For high temperature applications, i. e. medium
temperatures between 70 °C and 150 °C, the maximum
ambient temperature must be derated as per drawing.

E.g.: on medium temperature 120 °C the ambient temperature
of 55 °C around the switch housing should not be exceeded.

Inductive load (AC15) 3A / 230VAC 0,1A / 230VAC 1.5A / 230VAC 0,1A / 230VAC
Inductive load (DC) 0,1A / 230VDC 0,1A / 230VDC 0.1A / 230VDC 0,1A / 230VDC
Motor rating amps (FLA) 6A / 120 / 240VAC _ 2.5A / 120 / 240VAC
Lock rotor amps (LRA) 36A / 120 / 240VAC _ 15A / 120 / 240VAC

Note: Standard contact not suitable for electronic applications (< 100 mA)

Protection class (IEC 529)
with terminal cover
with appliance socket or cables with

plug PS3-Nxx / -Lxx / -215 / -415
Resistance to vibration (at 10..1000 Hz) 4g -40°C to 150°C for Range 6

Medium compatibility * HFC, HCFC Available approvals TÜV, UL

*) NOTE: PS3 are not released for use with inflammable refrigerants.

Max. medium

temperature

+ 70° C

+ 150° C

Construction Material

Single diaphragm Bronze no 1-5 No A,R A,K,L,S,U,X

Bellows Stainless yes 6 Yes B,S,W S,U,X

Standard

(SPDT)

IP 00
IP 30
IP 65

Gold plated contacts

Snubber Pressure

Ranges

Maximum ambient temperature (°C)

70

60

50

40

30

70 80 90 100 110 120 130 140 150
Medium temperature (°C)

Standard (SPDT)

Temperature range TS:

ambient, storage and
transportation

medium

Weight (approx.) 0.1 kg

TÜV

approval

Micro switch

(SPDT)

Function

Code *

Micro switch(SPDT)

Gold plated Contacts

-40°C to 70°C

-40°C to 70°C

Possible

Pressure Conn.

_
_

Pressure Ranges

Pressure Range

code

1 / A -0.6 .. 6 27 30 approx. 1,3

3 /C Standard 0.1 .. 16 approx. 1,5 see charts on page

4 / D and 5 / E (SPDT) 6 .. 30 31 36 approx. 4 4 - 6

6 / F 10 .. 43 43 48 approx. 5
J / S -0.6 .. 6 27 30 approx. 0.2 to 0.3
L / U Micro switch 0.1 .. 16 approx. 0.3 to 0.45

N / W (SPDT) 6 .. 30 31 36 approx. 0.4 to 0.6

O / X 10 .. 43 43 48 approx. 0.5 to 0.8

Type of contact Adjusting

Range

(bar)

Max. Operating

Pressure PS

(bar)

Proof

Press. PT

(bar)

Differential

reset (bar)

Differential

automatic

(bar)

Tolerances (bar)

Range code
Setting

Tolerances are valid between -20...+55°C.

1 / J 3 / L 4 5 / N 6 / O 4,5,6 (TÜV appr.)

±0.16 ±0.4 ±0.8 ±0.8 ±0.8

according to EN 12 263

PS3__35003_EN_R08.doc 2 / 10 09.08.2011

PS3

P

1

P

3

4

Alco Controls

Pressure Switch

D A T A S H E E T

Selection

1. Preferred types

Type PCN Fixed setting

Reset Max.

temperature

(bar)

pressure

Cut-out Cut-in ambient connection (bar)

High Pressure Controls

PS3-A6S 0 715 603 16,0 11,0 7/16"-20 UNF
PS3-A6S 0 715 604 19,0 15,0 Auto

+ 70°C + 150°C

PS3-A6S 0 715 600 26,5 22,5 Schrader opener

Low Pressure Controls / Pressure Limiter for low pressure protection PSL EN 12263

PS3-W1S 0 714 760 -0,3 1,2 7/16"-20 UNF
PS3-W1S 0 714 761 0,3 1,8 Auto

+ 70°C + 70°C

PS3-W1S 0 714 762 2,0 3,5 Schrader opener

Pressure Limiter for high pressure protection PSH with snubber for direct compressor mounting EN 12263

PS3-W6S 0 715 831 14,0 10,0
PS3-W6S 0 715 556 21,0 16,0 7/16"-20 UNF
PS3-W6S 0 715 555 25,0 20,0 Auto

+ 70°C + 150°C

PS3-W6S 0 715 567 29,0 23,0 Schrader opener
PS3-W6S 0 715 550 33,5 27,5 and snubber
PS3-W6S 0 715 553 40,0 33,0

Leakage

test

Pressure

connection

pressure

48 female thread with

30 female thread with

48 female thread with

Pressure Cut Out for high pressure protection PZH with snubber for direct compressor mounting EN 12263

PS3-B6S 0 715 568 19,2
PS3-B6S 0 715 564 22,7 appr. external 7/16"-20 UNF
PS3-B6S 0 715 563 27,3 5 bar manual

+ 70°C + 150°C

48 female thread with
PS3-B6S 0 715 569 29,5 below reset Schrader opener
PS3-B6S 0 715 560 36,0 cut-out and snubber

Delivery: small quantities, single package without plug (Cables with plug must be ordered separately, see page 8)

2. Customer specific types

Minimum batch size: 100 pieces

Switching points

The differential of factory set switch points can be adjusted
within the limits given in the charts on page 4 to 6. Use the
recommended lower switch point line in working envelope for
optimum results.

Example:

Step 1: Select your desired upper switch point P

. Draw a

1

horizontal line to cross the upper switch point line.
Step 2: Draw a vertical line from this intersection point.
Step 3: Select your desired switch point between P

and P4.

2

Notes:

1. Specify always upper and lower switching points for
pressure switch with automatic reset function.

2. Specify only cut-out switching point for pressure switch
with manual reset function.

3. For versions with micro-switch only one switching point can
be adjusted while the second switching point is determined
by the fixed differential of the micro-switch (see Pressure
Ranges on page 2).

40

pressure
(bar)

30

P

2

20

P

10

0

01234567891011

4. Specify such devices with one switching point as the

Example

Upper switching point

max. lower. .
recommended lower ...
min. lower...

... switching point

significant point and the other one as non-significant by
putting the latter in brackets, e.g. PS3-AJS 2.0/(1.8)

PS3__35003_EN_R08.doc 3 / 10 09.08.2011

PS3

Alco Controls

Pressure Switch

D A T A S H E E T

6

Range 1 / A

5

4

3

2

Pressure (bar)

1

0

-1
01234567891011

Range 3 / C

16

14

12

10

8

Pressure (bar)

6

4

2

0

01234567891011

PS3__35003_EN_R08.doc 4 / 10 09.08.2011

PS3

Alco Controls

Pressure Switch

D A T A S H E E T

Range 4 / D

30

25

20

5

1

Pressure (bar)

10

5

0

01234567891011

Range 5 / E

30

25

20

15

Pressure (bar)

10

5

0

01234567891011

PS3__35003_EN_R08.doc 5 / 10 09.08.2011

PS3

Service Valve

Service Valve

Alco Controls

Pressure Switch

D A T A S H E E T

45

40

35

30

25

20

Pressure (bar)

15

10

5

0

01234567891011

Range 6 / F

Selection guide

PS3-A6S

Service Valve

Receiver

Condenser

Fan Motor

PS3-B6S*

PS3-W1S*

PS3-W1U

PS3-W6S

PS3-W1S

Evaporator

*) Requires additional adapter such as: 1/8 or 1/4 NPT by 7/16-20 UNF flare male (see Other Accessories on page 8)

PS3__35003_EN_R08.doc 6 / 10 09.08.2011

PS3

Pressure Switch

D A T A S H E E T

Selection Sheet

For selection and sample request please fill-in complete

Note: not each combination is possible

Type code PS3 - - cut-in / cut-out

Alco Controls

Product Name
PS3: Compact fixed setting pressostat
PSC: Customer special version of PS3

Function
A: Pressure control, automatic, hp and lp

R: Pressure control, external manual reset, hp and lp
W: Pressure limiter, automatic TÜV Range 1-5

(high temperature Range 6, O, F, X only)
B: Pressure cut-out, external manual reset

TÜV Range 1-5

(high temperature, Range 6, O, F, X only)
S: Safety pressure cut-out, internal manual reset

TÜV Range 1-5
(high temperature, Range 6, O, F, X only)

Pressure Connectors
A: 7/16”-20 UNF male (Range 1-5), with console
G: G¼" female brass
K: 1 m cap. tube w. flare nut 7/16”-20UNF

(Range 1-5), with console

L: ¼”-ODM solder with 1 m cap. tube (Range 1-5),

with console

R: G¼" male brass
S: 7/16"-20 UNF female, Schrader depressor

(Range 6 with snubber)
U: 6 mm ODF brazing, with console

(Range 6 with snubber)

X: 1/4" ODF brazing, with console

(Range 6 with snubber)

Pressure Range / Contacts
Standard Contacts Microswitch
1: lp max 6 bar J: lp max 6 bar
3: lp max 16 bar L: lp max 16 bar
4: hp max 30 bar M: hp max 30 bar
5: hp max 30 bar N: hp max 30 bar
6: hp max 43 bar O: hp max 43 bar

Gold Plated Contacts Microswitch(Gold Plated Contacts)

A: lp max 6 bar S: lp max 6 bar
C: lp max 16 bar U: lp max 16 bar
D: hp max 30 bar V: hp max 30 bar
E: hp max 30 bar W: hp max 30 bar
F: hp max 43 bar X: hp max 43 bar

PS3__35003_EN_R08.doc 7 / 10 09.08.2011

PS3

+-P124bl

br

+-P

124blbr

+

-

P

1

24bl

br

+

-

P

124blbrbk+

-

P

1

24blbr+-P

124blbr

4

Pressure Switch

D A T A S H E E T

Accessories

Cables with Plug for PS3, gasket molded into plug (IP 65)

Type PCN No of leads Diameter

of leads

PS3-N15 804 580 1.5
PS3-N30 804 581 3 0.75 mm2 -25/+80 3.0
PS3-N60 804 582 6.0
PS3-L15 804 583 1.5
PS3-L30 804 584 3 0.75 mm2 -50/+80 3.0
PS3-L60 804 585 6.0
PS3-215 804 587 2 0.75 mm2 -25/+80 1.5
PS3-415 804 588 1.5

The following pictures show the different types of application:

(Pin numbers from PS3 – see below, bk = black, bl = blue, br = brown)

Temperature Range

°C

Alco Controls

Cable length

mtr.

High Pressure Application Low Pressure Application

PS3-Nxx

PS3-2xx

PS3-4xx

bk

PS3-Nxx

PS3-2xx

PS3-4xx

PS3 – Pins

1

2

PS3__35003_EN_R08.doc 8 / 10 09.08.2011

Other Accessories

17.5

8

5

23.5

Ø4.2

63.5

Ø4.8

2

3.5

7/16”-20UNF

7/16”-20UNF

20

48

39

2

2

PS3-Nxx

49

35

3

17.6

37

2

2

PS3-Nxx

80

Ø 1/4"

PS3

Alco Controls

Pressure Switch

D A T A S H E E T

121217.5

5

13

33

10

Angle bracket (H140-046.001)

for two PS3

PCN: 803 772

Adapter ¼”NPT-male -7/16”-20UNF-

male (for compressor direct mounting)

13

PCN: 800 315

Dimensions

Dimensions Range 1…5, A…E, J…N, S…W (in mm)

Free standing Panel mounting

41

Reset

SW 14

1/4”NPT

13

30

10

Adapter 1/8”NPT-male-7/16”-20UNF­male (for compressor direct mounting)

PCN: 800 316

41

PS3-Nxx

SW 14

1/8”NPT

43

35

15

Pressure Connection S

7/16-20 UNF female, with Schrader valve opener

Other Pressure Connections Range 1…5, A…E, J…N, S…W

25

80

Ø 6,0

A (Range 1-5)

7/16”-20 UNFmale

80 mm solder connection Ø 6 mm X80 mm solder connection Ø ¼”

U

43

35

4.5

Pressure Connection K

1 m cap tube with flare nut 7/16-20 UNF

Ø 1/4"

L

1 m cap tube Ø ¼” solder

conn.

1000

PS3__35003_EN_R08.doc 9 / 10 09.08.2011

D A T A S H E E T

39

20

48

2

2

PS3-Nxx

80

Ø 6

80

Ø ¼”

Dimensions Range 6, F, O, X (in mm)

1

4

43

35

43

PS3

Pressure Switch

28

28

Alco Controls

28

Connection S

7/16-20 UNF female

with Schrader valve opener

EMERSON is not to be held responsible for erroneous literature
regarding capacities, dimensions, applications, etc. stated herein.
Products, specifications and data in this literature are subject to change
without notice. The information given herein is based on technical data
and tests which EMERSON believes to be reliable and which are in
compliance with technical knowledge of today. It is intended only for

Emerson Electric GmbH & Co OHG
ALCO CONTROLS
Postfach 1251
Heerstraße 111
D-71332 Waiblingen
Germany
Phone ...[phone]
Fax ...[phone]

www.emersonclimate.eu

Benelux
Germany, Austria & Switzerland
France, Greece, Maghreb
Italia
Spain & Portugal
UK & Ireland
Sweden, Denmark, Norway & Finland
Eastern Europe & Turkey
Poland
Russia & Cis
Balkan
Romania
Ukraine

Connection U

80mm solder connection

Ø 6mm

use by persons having the appropriate technical knowledge and skills,
at their own discretion and risk. Our products are designed and adapted
for fixed locations For mobile applications failures may occur. The
suitability for this has to be assured from the plant manufacturer which
may include making appropriate tests.

This document replaces all earlier versions.

Phone:

[phone]
[phone]
[phone]
[phone]
[phone]
[phone]
[phone]
[phone]
[phone]
[phone]
[phone]
[phone]
[phone]

80mm solder connection

Fax:

[phone]
[phone]
[phone]
[phone]
[phone]
[phone]
[phone]
[phone]
[phone]
[phone]
[phone]
[phone]
[phone]

Connection X

Ø ¼”

PS3__35003_EN_R08.doc 10 / 10 09.08.2011