Danfoss KP 35, KP 36, KPI 35, KPI 36, KPI 38 Data sheet

Data sheet

Pressure switch and Thermostat
KP and KPI

The KP and KPI pressure switches and
thermostats are used for control, monitoring
and alarm systems in a wide variety of industry
applications.

KP pressure switches are mainly used for gaseous
fluid whereas KPI pressure switches are more
for liquid and gaseous fluid. The products
are available in IP30 enclosure as well as IP55
enclosure.

The KP pressure range include special designed
pressure switches and limiters for steam boilers
and other heating applications.

For water pump control and protection (dry run)
the dual pressure switch KP44 is suitable and
secure improved life time of the water pump.

Features • Wide setting range

• Shock and impact resistant

• Snap action electrical contacts minimize
chatter, bounce, and wear, and ensure long
term electrical and mechanical reliability

• Small dimensions - space saving and easy
to install in panels

• Electrical connection from front
of the unit makes rack mounting easier
and also saves space

• Suitable for alternating current
and direct current

• Single pressure switches and thermostats are
fitted with a single pole double throw contact
system (SPDT)

• Can be used for both liquids and gases (KPI)

Approvals CE-marked in accordance with LVD 2014/35/EU:

EN 60947-1, EN 60947-4-1, EN 60947-5-1
Underwriters Laboratories Inc., UL

• Manual trip function enables electrical
connections verification without any tools or
pressure changes in the application

• Versions with automatic and manual
reset available

• For demineralized water, there are special KP
models with wetted parts made of stainless
steel (AISI 316L)

China Compulsory Certificate, CCC
(excluding boiler versions)
GOST (excluding KPI)

© Danfoss | DCS (rm) | 2019.12

IC.PD.P10.F9.02 | 1

Data sheet | Pressure switch and Thermostat, KP and KPI

Technical data

Single pressure switch

Description KP 35, KP 36 KPI 35, KPI 36 KPI 38

Ambient temperature [°C] -40 – 65 °C (for max. 2 hours up to 80 °C)
Media temperature [°C] -40 – 100 °C

Fluid Gaseous media

Bellows

Parts in contact
with fluid

Contact system

Contact load, Silver

Contact load,
Gold plated contact set

Enclosure, IP30 grade

Enclosure, IP44 grade Mounted as IP30 plus fitting of top cover, code no. 060-109766

Enclosure, IP55 grade

Cable entry Rubber cable gland entry for 6 – 14 mm diameter cables
Mounted on back

plate / wall bracket
Mounted on angle bracket Not recommended in areas where vibrations occur

Pressure
connector

Phosphor bronze
or Stainless steel

Free-cutting steel
(nickel plated)
or Stainless steel

Single-pole double throw (SPDT)

Alternating current:

AC-1: 16 A, 400 V
AC-3: 16 A, 400 V
AC-15: 10 A, 400 V

Direct current:

DC-13: 12 W, 220 V

See information page 15

Unit must be mounted on a flat surface / a flat fitting and all unused holes
covered

Unit mounted in a special IP55 enclosure, code no.
060-033066 or 060-062866

Vibration proof in the range 0 – 1000 Hz, 4 g [1 g = 9.81 m/s2

Gaseous media and
liquids

Phosphor bronze Stainless steel

Brass Free-cutting steel (nickel plated)

Alternating current:

AC-1: 10 A, 440 V
AC-3: 6 A, 440 V
AC-15: 4 A, 440 V

Direct current:

DC-13: 12 W, 220 V

KP 34, KP 35, KP 36,
KP 37 boiler version

Steam, air, gaseous
media & liquids

Alternating current:

AC-1 : 16 A, 400 V
AC-3 : 16 A, 400 V
AC-15 : 10 A, 400 V

Direct current:

DC-13: 12 W, 220 V

© Danfoss | DCS (rm) | 2019.12 IC.PD.P10.F9.02 | 2

Data sheet | Pressure switch and Thermostat, KP and KPI

Ordering Pressure switch, types KP 35 and KP 36

Permissible

Typ e

Setting

range P

e

Differential

[bar] [bar] [bar] [bar]

-0.2 – 7.5 0.7 – 4.0 17 22 G 1⁄4 A silver

KP 35

-0.2 – 7.5 0.7 – 4.0 17 22 G 1⁄4 A gold-plated 060-50476 6

-0.2 – 7.5 0.7 – 4.0 17 22 G 1⁄4 A silver 060-538666 2)

-0.2 – 7.5 0.7 – 4.0 17 22 G 1⁄4 A silver 060-450366 3)

2.0– 14.0 0.7 – 4.0 17 22 G 1⁄4 A silver

2.0– 14.0 0.7 – 4.0 17 22 G 1⁄4 A gold 060-113 766

KP 36

2.0– 14.0 0.7 – 4.0 17 22 G 1⁄4 A silver 06 0-538766 2)

4.0 – 12.0 0.5 – 1.6 17 22 G 1⁄4 A silver 06 0-122166

4.0 – 12.0 0.5 – 1.6 17 22 G 1⁄4 A gold 06 0-114 4 66

4.0 – 12.0 0.5 – 1.6 17 22 G 1⁄4 A silver 06 0-450166 3)

1

) Available only in Asia market

2

) IP55 transparent enclosure

3

) Stainless steel version, IP55 non-transparent enclosure

Pressure switch, types KPI 35 – KPI 38

Setting

Typ e

range P

[bar] [bar] [bar] [bar]

-0.2 – 8.0 0.4 – 1.5 18 18 G 1⁄4 A silver 06 0-121766

KPI 35

-0.2 – 8.0 0.4 – 1.5 18 18 G 1⁄4 A gold-plated 060-3164 66

-0.2 – 8.0 0.5 – 2.0 18 18 G 1⁄4 A silver 06 0-1219 66

-0.2 – 8.0 0.4 – 1.5 18 18 G 1⁄4 A silver 060 -315766 1)
4 .0– 12.0 0.5 – 1.6 18 18 G 1⁄4 A silver 06 0-118966

KPI 36

4.0 – 12.0 0.5 – 1.6 18 18 G 1⁄4 A gold-plated 0 60 -113866

2.0 – 12.0 0.5 – 1.6 18 18 G 1⁄4 A silver 060-3169 66

2.0 – 12.0 0.5 – 1.6 18 18 G 1⁄4 A silver 06 0-3193 66 2)

KPI 38

1

) IP55 transparent enclosure

2

) IP55 non-transparent enclosure

8.0 – 28.0 1.8 – 6.0 30 30 G 1⁄4 A silver 060-508166

8.0 – 28.0 1.8 – 6.0 30 30 G 1⁄4 A silver 060-54186 6 2

e

Differential

operating

pressure P

Permissible

operating

pressure P

pressure

e

e

Max.

test

Max.

test

pressure

Pressure

connection

Pressure

connection

Contact

material

Contact

material

Code no.

060-113 366

060-113 391 1)

060-110866

060-110891 1)

Code no.

Pressure switch, types KP 34 – KP 37, boiler version

Typ e

KP 34

KP 35

KP 36

KP 37

Setting

range pe

Differential

Reset

[bar] [bar] [bar] [bar]

0.1 – 1.0 0.1 – 0.4 Automatic G 1⁄2 A 4.0 silver 0 60-216 466

0.1 – 1.0 0.2 Manual G 1⁄2 A 4.0 silver 060 -216366

0.4 – 3.4 0.4 – 2.2 Automatic G 1⁄2 A 10 silver 060-216666

0.4 – 3.4 0.5 Manual G 1⁄2 A 10 silver 060-216566

1.0 – 10.0 0.7 – 4.0 Automatic G 1⁄2 A 17 silver 060 -21596 6

1.0 – 10.0 0.7 Manual G 1⁄2 A 17 silver 060-216066

4.0 – 20.0 1.8 – 3.1 Automatic G 1⁄2 A 28 silver 060 -216166

4.0 – 20.0 3.0 Manual G 1⁄2 A 28 silver 060 -216266

Pressure

connection

Max. test

pressure

Contact

material

Code no.

© Danfoss | DCS (rm) | 2019.12 IC.PD.P10.F9.02 | 3

Data sheet | Pressure switch and Thermostat, KP and KPI

Contact system
and application

Setting

Switch type – single pole double throw Switch action Application

1. Terminal 1 – 4 close high and open low

SPDT

Terminal 1 – 2 can be used as low
pressure alarm

2. Terminal 1 – 2 open high and close low
Terminal 1 – 4 can be used as high
pressure alarm

1. Low pressure cut-out

2. High pressure cut-out

Diff.

Range

Note:

For low pressure switches
the restart pressure is equal
to cut-out pressure plus
differential value.

Cut-in and cut-out pressures of the system
should always be checked with an accurate
pressure gauge.

Pressure setting for switches with automatic
reset.

1. Set the cut-in pressure on the “CUT-IN”
scale (range scale).

2. Set the differential on the “DIFF” scale.

The cut-out pressure must be above absolute
vacuum (pe = -1 bar).
For high pressure switches the restart pressure
is equal to cut-out pressure minus differential.

Pressure switches with manual reset

Set the cut-out presure on the “CUT-OUT”
scale (range scale).
High pressure limiters can be manually reset
when the pressure is equal to the stop pressure
minus the differential.

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60-973.13.10

60-972.13.10

13 122

13

60-776.17.10

60-974.12.10

4 3 1 13 2 12

13 2 12

Data sheet | Pressure switch and Thermostat, KP and KPI

Design / Function

1. Setting spindle

2. Differential setting
spindle

3. Main arm

4. Main spring

5. Differential spring

6. Bellows

7. Pressure connector

8. Contact system

9. Connection terminals

10. Earth terminal

11. Cable entry

12. Omega spring (KPI)

12. Tumbler (KP)

13. Locking screw

14. Manual reset

Key sketch of KP pressure switch

4

3

1 13 2 12 8

5

4

9

10

6

7

Key sketch of KPI pressure switch

2 4 1

10

6

7

1

3

Danfoss

2

1

4

4

1

2

Danfoss

5

6

11

7

8

11

1

Danfoss

8

5

9

3

2

4

1

Danfoss

4

6

5

8

11

7

11

Key sketch of KP pressure switch, boiler version

3

3

1

2

4

10

6

7

The contact system in KP pressure switches has
a snap function. This means that the bellows
is active only when the cut-in or cut out value
is reached.
The bellows is connected to the pressure of the
controlled plant via the connector (7).

4 1

14

11

Danfoss

60-1356.11.10

3

1

8

4

9

6

4

1

2

7

Danfoss KPI pressure switches are designed
so that the bellows moves in the same
proportion as the pressure switches change.
To ensure a snap function on contact change
over, an omega spring is located between
bellows and contact system.

Danfoss

60-1355.11.10

2

12

8

5

11

© Danfoss | DCS (rm) | 2019.12

IC.PD.P10.F9.02 | 5

84

44

6128 – 30

Danfoss

60-1358.11

60-1357.11

60-221.13

60-221.13

Danfoss

60-221.13

Data sheet | Pressure switch and Thermostat, KP and KPI

Dimensions [mm]
and weights [kg]

Pressure switch, types KP 35, KP 36, KPI 35, KPI 36 and KPI 38

Standard IP30 housing

=14

IP55 enclosure

Danfoss

60-9059.10

Net weight approx. 0.3 kg

Dimensions [mm]
and weights [kg]

(Boiler version)

Wall bracket Angle bracket

Danfoss

Pressure switch, types KP 35 and KP 36 Pressure switch, type KP 34

Danfoss

© Danfoss | DCS (rm) | 2019.12

Rubber Grommet
for 6 – 14 mm cable

G 1/2 A

Net weight approx. 0.34 kg

Rubber Grommet
for 6 – 14 mm cable

G 1/2 A

Net weight approx. 0.43 kg

IC.PD.P10.F9.02 | 6

Danfoss

Data sheet | Pressure switch and Thermostat, KP and KPI

Accessories for KP pressure switches

Part Symbol Description Tot al Code no.

Brackets
with mounting
screws
and washers

Screwed
cable entry

Sealing screw For sealing the setting on KP 2 06 0-105766

Top cove r

Protective cap

Wall bracket for KP 1 060-105566

Angle bracket for KP 1 060-105666

PG 13.5 with special nut
For 6 –14 mm diameter cables

If a bracket is mounted on the backplate of the housing,
the KP thermostats will have an IP44 grade of enclosure.
The cover protects the setting spindles

Protective cap for KP pressure switches and thermostats.
To protect the unit against rain and humidity.
Grade of enclosure: IP44
Material: Polyethylene
Max. ambient temperature: 65 °C
Min. ambient temperature: -40 °C

1 060-105966

1 06 0-10 9766

1 060 -003166

IP55
non­transparent
enclosure

IP55
transparent
enclosure

If the unit risk being exposed to heavy water influence
a better grade of enclosure can be achieved when
mounting product in a special IP55 enclosure

If the unit risk being exposed to heavy water influence
a better grade of enclosure can be achieved when
mounting product in a special IP55 enclosure

1 060-033066

1 060-062866

© Danfoss | DCS (rm) | 2019.12 IC.PD.P10.F9.02 | 7

Data sheet | Pressure switch and Thermostat, KP and KPI

Technical data Dual pressure switch

Ambient temperature [°C] - 40 – 65 °C (for max. 2 hours up to 80 °C)
Media temperature [°C] Max. 100 °C
Fluid Liquids

Parts in contact with fluid

Contact system

Contact load, Silver

IP level IP22
Cable entry Rubber cable gland entry for 6 – 14 mm diameter cables
Mounted on backplate or wall bracket Vibration-proof in the range 0 – 1000 Hz, 4 g [1 g = 9.81 m/s2
Mounting on angle bracket Not recommended for areas where vibration occurs

Bellows Phosphor bronze, CuSn6
Pressure connector Free-cutting steel (nickel plated)

left

side

Alternating current:

AC-1: 16 A, 400 V
AC-3: 16 A, 400 V
AC-15: 10 A, 400 V

Direct current:

DC-13: 12 W, 220 V

right

side

manual

start

Ordering

Pressure switch, type KP 44

Pressure range Differential Permissible

[bar] [bar] [bar] [bar] [bar] [bar]

2.0 – 12.0 0.5 – 6.0 0.7 – 4.0 1.0

operating

pressure p

Left side: 17

Right side: 17

e

Right side: 19

Max. test

pressure

Left side: 25

Pressure

connection

2 × G 1⁄4 A silver 0 60- 001366

Contact
material

Code no.Control Safety Control Safety

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60-1175.12.10

1 6 14 2 13 9 4 14

12 10 8

Data sheet | Pressure switch and Thermostat, KP and KPI

Design / Function Key contact system of KP 44 pressure switch

3

1. Lefthand pressure

setting spindle

5

2. Differential setting
spindle

11

3. Main arm

4. Righthand pressure

setting spindle

5. Main spring

6. Differential spring

7. Bellows

8. Pressure connections

7

9. Contact system

10. Terminal

8

11. Earth terminal

12. Cable entr y

13. Tu mb ler

14. Locking plate

15. Impulse lever

Water supply from reservoir or well

The contact system in the KP 44 has a snap­action function and allows the bellows moves
only when the cut-in or cut-out value is reached.
If water is running short in the well or reservoir,
the pump will no longer be able to increase the
pressure to the cut-out value. Consequently the
pump will keep running - perhaps without water.
However, the KP 44 pressure switch will stop the
pump as soon as the righthand bellows pressure
drops below the safety cut-out setting.
The pump can be started again by lifting the
impulse lever. The pump will continue to operate
when the impulse lever is released, provided that
the righthand bellows pressure is higher than the
safety cut-out setting plus a fixed differential
of 1 bar. If this is not the case, the pump
will cut-out again indicating insufficient
water supply.

Danfoss

5

15

7

Pressurized water supply direct to pump

When water supply fails on the inlet side,
the pump will no longer be able to boost the
pressure to the cut-out value. Consequently the
pump will keep running - perhaps without water.
However, the KP 44 pressure switch will stop the
pump as soon as the pressure in the pump
suction line drops below the safety cut-out
setting. The pump will automatically start again
when the pump suction pressure has reached
the level of 1 bar above the safety cut-out
setting.
Automatic start-up will only take place if the
righthand bellows is connected to the pump
suction line. Air pockets should be avoided to
prevent the pump from starting up on air
pressure rise, without the presence of water.

In a hydrophore system where water is pumped
from a well or an open tank, both bellows are
connected to a pressure outlet on the air
side in the pump pressure line, if possible.

© Danfoss | DCS (rm) | 2019.12

In a booster system receiving pressurized
water the righthand bellows is connected

• to the low pressure side of the pump
forautomatic start-up

• to the high pressure side of the pump
for manual start-up

The lefthand bellows is always connected
to the high pressure side of the pump.

IC.PD.P10.F9.02 | 9

60-1178.12

Data sheet | Pressure switch and Thermostat, KP and KPI

Setting

Dimensions[mm]
and weights [kg]

Safety cut-out setting

The righthand bellows will automatically cut-out
the pump at the safety cut-out setpoint.
Automatic start-up, if any, will take place when
the pressure has reached the level of 1 bar above
the setpoint. Manual cut-in is made by lifting the
impulse lever and releasing it again when the

The safety cut-out setpoint is normally
determined by the static pressure (the water
column). However, in order to avoid disturbing
signal interaction, care should be taken to ensure
that the safety cut-out setting is at least 1.5 bar
lower than the control pressure cut-in setting.
See table with pressure setting examples below.

pressure has increased by min. 1 bar.

Required tap water pressure ≥ 2.3 bar ≥ 4.0 bar ≥ 5.0 bar ≥ 8.0 bar
Control pressure cut-out setting 3.0 bar 5.0 bar 8.0 bar 12 bar
Differential 0.7 bar 1.0 bar 3.0 bar 4.0 bar
Control pressure cut-in setting 2.3 bar 4.0 bar 5.0 bar 8.0 bar
Max. safety cut-out setting 0.8 bar 2.5 bar 3.5 bar 6.0 1 bar

1)

6.0 bar is the normal max. setpoint

Control pressure settings

Control pressure cut-out setpoint
is set on the lefthand pressure setting scale.

The differential is set between 0.7 and 4 bar.
The control pressure cut-in setting will be the
cut-out control pressure less the differential.

Danfoss

Net weight approx. 0.5 kg

Accessories for KP 44
pressure switches

Part Symbol Description Tot al Code no.

Wall bracket 1 060-105566

Brackets with
mounting
screws and
washers

Screwed
cable entry

Sealing screw For sealing the setting on KP 2 06 0-10576 6

Angle bracket 1 060-105666

Screwed cable entry
Pg 13.5 with special nutfor 6 – 14 mm cables

1 060-105966

© Danfoss | DCS (rm) | 2019.12

IC.PD.P10.F9.02 | 10

Data sheet | Pressure switch and Thermostat, KP and KPI

Technical data

Single thermostat

Ambient temperature [°C] - 40 – 65 °C (for max. 2 hours up to 80 °C)
Sensor material Tinned copper Cu/Sn5

Contact system

Single-pole double throw (SPDT)

Alternating current:

AC-1: 16 A, 400 V

Contact load, Silver

Contact load,
Gold plated contact set

Enclosure, IP30 grade

Enclosure, IP44 grade Mounted as IP30 plus fitting of top cover, code no. 060-109766

Enclosure, IP55 grade

Cable entry Entry for 6 – 14 mm diameter cable
Mounted on backplate or wall bracket Vibration-proof in the range 0 – 1000 Hz, 4 g [1 g = 9.81 m/s2
Mounted on angle bracket Not recommended for areas where vibration occurs

AC-3: 16 A, 400 V
AC-15: 10 A, 400 V

Direct current:

DC-13: 12 W, 220 V

See Information page 15

Unit must be mounted on a flat surface / a flat fitting
and all unused holes covered

Unit mounted in a special IP55 enclosure, code no. 060-033066
or 060-062866. Exception: KP 75

Ordering

Thermostat, types KP 75 – KP 81

Typ e

KP 75

KP 78 30 – 90 5 – 15 150 2 silver 060L118466
KP 79 50 – 100 5 – 15 150 2 silver 060L112666
KP 81 80 – 150 7 – 20 200 2 silver 060L112566
KP 81 80 – 150 7 – 20 200 3 silver 060L118366
KP 81 80 – 150 7 – 20 200 5 silver 060L117066
KP 81

(max. reset)

Setting range Differential

[°C] [°C] [°C] [m]

0 – 40 3 – 10 80 Room sensor silver 060L1212 66
0 – 40 3 – 10 80 Room sensor gold-plated 060L117166

80 – 150

8

(max. reset)

Max. sensor

temperature

200 2 silver 060L115566

Capillary

tube length

Contact

material

Code no.

© Danfoss | DCS (rm) | 2019.12 IC.PD.P10.F9.02 | 11

7

11

10

60-971.13.10

12118

1

4

5

6

8

7

12

11

Danfoss

60-970.12.10

8

7

12

11

12

7

Data sheet | Pressure switch and Thermostat, KP and KPI

Design / Function Key sketch of KP thermostat, types KP 78, KP 79, KP 81

1. Temperature setting
spindle

2. Differential setting
spindle

3. Main arm

4. Main spring

5. Differential spring

6. Bellows

7. Sensor

8. Contact system

9. Connection terminals

10. Earth terminal

11. Cable entry

12. Tumbler

10

7

12

2

3

4

4

5

5

9

8

9

6

6

1

2

3

4

5

6

Danfoss

KP 75 room sensor

The contact system in KP thermostats has a snap
function. This means that the bellows is active
only when the cut-in or cut-out value is reached.

12

8

11

7

Charges

6. Bellows

7. Sensor

13. Capillary tube

Setting

© Danfoss | DCS (rm) | 2019.12

7

oss

6

13

Danfoss

60-909.11.10

Thermostats with automatic reset

Set the upper limit temperature on the range
scale. Then set the differential on the DIFF scale.
The temperature set on the range scale is also
the temperature at which contact changeover
re-occurs on rising temperature.
The contacts changeover when the temperature
has fallen to a value lower than that set on the
DIFF scale.
If at lower settings the plant will not start/stop,
the reason might be that the differential has
been set too high.

Absorption charge

The charge consists partly of a superheated gas
and partly of a solid substance with a large
absorption surface.
The solid substance is concentrated in the sensor
(7), and consequently it is always the sensor that
comprises the temperature-regulating part of
the thermostatic element.
The sensor can be placed both warmer or colder
than the thermostat housing and capillary tube.
However, placing it in an ambient temperature
higher or lower than 20 °C can affect the
accuracy of the scale.

Thermostats with minimum reset

Set the temperature on the range scale.
The differential setting is fixed.
Min. reset units will restart after the temperature
at the thermostat sensor has risen by a value
greater than that of the fixed differential.

Thermostats with maximum reset

Set the stop temperature on the range scale.
The differential setting is fixed.
Max. reset units will restart after the temperature
at the thermostat sensor has fallen by a value
greater than that of the fixed differential.

IC.PD.P10.F9.02 | 12

60-298.16

61 14

84

60-435.13

60-663.11

60-221.13

60-221.13

Danfoss

60-221.13

Data sheet | Pressure switch and Thermostat, KP and KPI

Dimensions [mm]
and weights [kg]

Thermostat, types KP 75, KP 78, KP 79, KP 81

Danfoss

Net weight approx. 0.4 kg

IP55 enclosure

KP 75 Sensor: Tinned copper Cu/Sn 5

Danfoss

Wall bracket

KP 78, 79, 81 Sensor: Tinned copper Cu/Sn 5

Danfoss

Angle bracket

© Danfoss | DCS (rm) | 2019.12

Danfoss

Danfoss

IC.PD.P10.F9.02 | 13

Data sheet | Pressure switch and Thermostat, KP and KPI

Accessories for KP thermostats

Part Symbol Description Tot al Code no.

Brackets
with mounting
screws
and washers

Sensor holder

Screwed
cable entry

Sealing screw For sealing the setting on KP 2 06 0-10576 6

Top cove r

Wall bracket for KP 1 060-105566

Angle bracket for KP 1 060-105666

Sensor holder for wall mounting with four capillary
tube clips and 9-off 12 mm pins

PG 13.5 with special nut
For 6 – 14 mm diameter cables
A standard Pg 16 cable entry can be used for 8 –16
mm diameter cables

If a bracket is mounted on the backplate of the
housing, the KP thermostats will have an IP44 grade
of enclosure. The cover protects the setting spindles

1 017-420166

1 060-105966

1 06 0-109766

Protective cap

Sensor pocket

Heat­conductive
aluminium
paste

Brass Stainless steel

Permissible pressure of sensor pipe medium

Tub e

Protective cap for KP pressure switches and thermostats.
To protect the unit against rain and humidit y.
Grade of enclosure: IP44
Material: Polyethylene
Max. ambient temperature: 65 °C
Min. ambient temperature: -40 °C

For all KP thermostats with cylindrical remote sensor.
Sensor pocket, gasket and union for screwing into G½
connectors welded onto tubes, containers, etc.

Int. diameter 9.6 mm, insert depth 112 mm (brass).
Ext. diameter 11 mm

Int. diameter 9.6 mm, insert depth 112 mm (st 18/8).
Ext. diameter 11 mm

Int. diameter 9.6 mm, insert depth 465 mm (brass).
Ext. diameter 11 mm

Media temperature for sensor: 250 °C
This temperature can be increased by applying a different gasket material

For KP and RT thermostats
with sensor mounted in a sensor pocket.
Temperature range: -20 – 150 °C (short-lived 220 °C)

Tube with 5 g aluminium paste

1 060-003166

1 017- 437066

1 017- 436 966

1 017-421666

1 0 41E0114

© Danfoss | DCS (rm) | 2019.12 IC.PD.P10.F9.02 | 14

Data sheet | Pressure switch and Thermostat, KP and KPI

General information
Gold contacts

Contact material Gold-plated silver

Contact
system

Single-pole double throw (SPDT)

Contact load
(when Au
surface is burnt
away)

Alternating current:

Ohmic load: AC-1: 10 A, 440 V
Inductive load: AC-3: 6 A, 440 V
AC-15: 4 A, 440 V

Direct current: DC-13: 12 W, 220 V

Curve A gives the maximum load.
Hatched area B: Acceptable load
for the gold plating of the contact (DC-13).

© Danfoss | DCS (rm) | 2019.12 IC.PD.P10.F9.02 | 15

Terminology

Range setting / Set point

The pressure range within which the unit
will give a signal (contact changeover).

Differential

The difference between contact changeover
on rising and falling pressure.
The differential is a condition for stable
automatic plant operation.

Manual reset

A unit with manual reset can only
be restored to operational mode by activation
of the external reset button.
Min. reset units will restart after the pressure
has risen by a value greater than that of the fixed
differential.
Max. reset units will restart after the pressure
has fallen by a value greater than that of the fixed
differential.

Permissible operating pressure

The highest permissible constant pressure
or pressure variation the unit can be exposed to.

Maximum working pressure

The maximum permissible pressure
for safe functioning of a heating system
or any of its parts.

Snap function

A specific contact force is maintained until snap
is initiated. The time over which contact force
reaches zero is a few milliseconds; therefore,
contact bounce cannot occur as a result, for
example, of slight vibrations before cut-out.

The snap-action contact system will continue
to function even when micro-welds are created
between the contacts during cut-in.

The force created to separate the contacts
is strong, and instantly shears off all contact
surface welds that have been created as the
result of cut-in action.

These design features ensure that the cut-out
point of the KP control remains very accurate
and completely independent of the magnitude
of the current load.

Automatic reset

Units with automatic reset
restart automatically after stop.

Maximum test pressure

The maximum pressure applied
in strength or leakage tests on heating
system or components thereof.

Current ratings:

AC – 1
The alternating current rating, in amperes,
of the non-inductive, slightly inductive
loads or resistive furnaces

AC – 3
The alternating current rating, in amperes,
of the squirrel-cage motors: starting,
plugging, inching

AC – 15
The alternating current rating, in amperes,
of electromagnetic loads (>72VA)

DC – 13
The direct current rating, in amperes,
of electromagnets

© Danfoss | DCS (rm) | 2019.12 IC.PD.P10.F9.02 | 16