Danfoss CKB Data sheet

Data Sheet

Pressure switch Type CKB

Pressure switch for R744 (CO2)

Safety pressure switch CKB are compact disc type pressure switches with xed set-points for long-standing use in all CO2 refrigeration

systems.

CKB safety pressure switch is used to protect compressor and the system against too high pressure.

CKB safety pressure switch provides excellent performance, ensuring minimal drift of setting and extremely stable operation over the entire lifetime. It provides automatic or manual reset limit protection.

The small size, lightness and high degree of protection means that it can be mounted directly on the refrigeration systems. The switch is available with dierent pressure settings to suit customer requirements.

AI374346854728en-000102

Pressure switch, type CKB

Features

• Electromechanical design with diaphragm as sensing element

• Fixed pressure set points

• SPDT contact syste

• Automatic (PSH) or manual reset (PZH / PZHH)

• Electrical connection with DIN plug

• Water-proof enclosure (IP65)

• For use as high pressure cut out

• For CO2 subcritical and transcritical CO2 systems up to 143 bar

• Compact design and easy to install

• PED 2014/68/EU Category IV according to EN 12263

GC

MT

LT

High pressure switch

Pressure switch, type CKB

Applications

Figure 1: Safety pressure switch in subcritical and transcritical CO systems

2

1

5

6

7

2

3

4

1234567

Electrical connector

Water-proof casing

Diaphragm

Pressure connection (

1

⁄4 in female are)

Micro-switch

Shaft

Depressure pin

Type

CKB

Medium

R744 (CO

2

)

Range

(xed settings)

40 - 130 bar

Accuracy of setting

0/-8% (EN 12263)

Dierential

10 bar (auto reset) / 25 bar (manual reset)

Contact function

SPDT

Electrical connections

DIN plug (to be ordered separately)

Contact load

Full Load: Cosφ= 0,75 1 to 6A 240V AC

Inrush current: Maximum 36A 240V AC

Pressure connections

7/16”-20UNF female thread with Schrader opener

Maximum working pressure PS / MWP

143 bar

Media temperature

-40 to +150°C (do not freeze)

Ambient humidity

30% RH to 85% RH (do not condense)

Vibrations resistance

4G (at 20 - 250Hz)

Ambient temperature for storage, transport and using

-40 to +70°C

Enclosure

IP65, if used with DIN plug (EN175301-803-A (ISO 4400))

Pressure switch, type CKB

Product specication

Design and materials

Figure 2: CKB

As pressure is applied through the connection on to the diaphragm, the diaphragm is pushed up against the operation shaft.

When the operation shaft rises, it pushes up the contact plate in the micro-switch, so that contacts become connected or disconnected.

As the pressure in the connection decreases, the diaphragm returns to its original state, and the operation shaft lowers, causing the contact plate to return to its original position.

Technical data

Table 1: Type CKB

PSH

Diagram 1 Diagram 2

PZH/PZHH

P

M

Operating direction on press. increase at high

press. side

Opearting direction on manual reset

Reset Button

Unit: mm

PZHH

PZH

PSH

EN 175301-803-A

(ISO 4400)

Pressure switch, type CKB

Electrical connections

Figure 3: Contact functions

Figure 4: Wirings

Dimensions and weight

Figure 5: PSH-PZH-PZHH

7/16-20UNF 2B

with Schrader

Pressure switch, type CKB

Figure 6: Pressure admission port (Details)

Reset type

Set pressure

[bar]

Code number

PSH

Automatic

40

061Z1001

PSH

Automatic

46

061Z1002

PSH

Automatic

48

061Z1003

PSH

Automatic

105

061Z1004

PSH

Automatic

108

061Z1005

PSH

Automatic

110

061Z1011

PZH

Manual

40

061Z2001

PZH

Manual

108

061Z2002

PZH

Manual

110

061Z2003

PZHH

Manual with tool

120

061Z3001

PZHH

Manual with tool

130

061Z3002

Pressure switch, type CKB

Ordering

Standard models

Table 2: PSH-PZHH

Document name

Document type

Document topic

Approval authority

Declaration No.CE-PL-0071

Declaration of conformity

2014/68/EU & 2014/35/EU & RoHS

SAGINOMIYASEISAKUSHO,INC.

Pressure switch, type CKB

Certicates, declarations, and approvals

The list contains all certicates, declarations, and approvals for this product type. Individual code number may have some or all of these approvals, and certain local approvals may not appear on the list.

Some approvals may change over time. You can check the most current status at danfoss.com or contact your local Danfoss representative if you have any questions.

Table 3: Certicates, declarations, and approvals

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Danfoss CKB Data sheet

Specifications and Main Features

Frequently Asked Questions

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