Danfoss KP Thermostats Data sheet

Data Sheet

Thermostat
Type KP

The KP Thermostats are single-pole, double­throw (SPDT) temperature-operated electric
switches.

They can be connected directly to a single­phase AC motor of up to approx. 2 kW or
installed in the control circuit of DC motors and
large AC motors.

The KP Thermostats are used for regulation, but
can also be seen in safety monitoring systems.

They are available with vapour charge or with
adsorption charge. With vapour charge the
dierential is very small. The KP Thermostats
with adsorption charge are widely used to give
frost protection.

Features

• Wide regulating range

• Can be used for deep freeze, refrigeration and
air conditioning plant

• Welded bellows elements mean increased
reliability

• Small dimensions. Easy to install in
refrigerated counters or cold rooms

• Ultra-short bounce times. This gives long
operating life, reduces wear to a minimum
and increases reliability

• Standard versions with changeover switch.
Possible to obtain opposite contact function
or to connect a signal

• Electrical connection at the front of the unit.

◦ Facilitates rack mounting
◦ Saves space

• Suitable for alternating and direct current

• Cable entry of soft thermoplastic for cables
from 6 to 14 mm diameter

• Extensive and wide range

AI203586420959en-000801

KP 63

KP 68

KP 69

KP 62

KP 71

KP 73

KP 75

KP 77

KP 79

KP 81

KP 98 HT

KP 98 HT

KP 98 OILKP 98 OIL

Vapour range

Adsorption charge

KP 61

KP 62

-50 50 100 150 200°C0

Danfoss

60-1038

Thermostat, Type KP

Portfolio overview

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Features

Description

Ambient temperature

-40 – 65 °C (80 °C for max. 2 hours)

Switch

Single-pole, double-throw (SPDT) changeover switch

Contact load
Alternating current
AC1 =16 A, 400 V

AC3 = 16 A, 400 V

Direct current

DC13: 12 W, 220 V control current

Wire dimensions

solid / stranded

0.75 – 2.5 mm

2

exible, without ferrules

0.7 – 2.5 mm

2

exible, with ferrules

0.5 – 1.5 mm

2

Tightening torque

max. 2 Nm

Rated impulse voltage

4 kV

Pollution degree

3

Short circuit protection, fuse

16 A

Insulation

400 V

Enclosure

IP30 / IP44

KP temperature control

KP 98

Line

SPDT

16A

1

2

4

M

Danfoss

60-894.12

M

HTOIL

16A

A

Q

B C

Thermostat, Type KP

Product specication

Technical data

Table 1: Technical data

Cable connection

Cable entry for cables 6 – 14 mm dia. A Pg 13.5 screwed cable entry can be used for 6 – 14 mm dia. cables. With 8 –
16 mm cables a standard Pg 16 screwed cable entry can be used.

Enclosure IP30 to EN 60529 / IEC 529

This grade of enclosure is obtained when the unit is mounted on a at surface or bracket. The bracket must be xed
so that all unused holes are covered.

Contact systems

Table 2: Contact systems

Terminology

Dierential

The dierential is the dierence between the make and break temperatures. A dierential is necessary for
satisfactory automatic operation of the plant.

Mechanical dierential (intrinsic dierential)

The mechanical dierential is the dierential set by the dierential spindle.

Operating dierential (thermal dierential)

The operating dierential is the dierential the plant operates on. Operating dierential is the sum of the
mechanical dierential and the dierential produced by the time constant.

Reset

1. Manual reset:

Units with manual reset can only be restarted after the reset button has been activated. On min. reset units the set
value is equal to the cut-out value for falling temperature. On max. reset units the set value is equal to the cut-out
value for rising temperature.

© Danfoss | Climate Solutions | 2021.03 AI203586420959en-000801 | 3

1

2

3

7

8

9

15

17

12

16

4

1

2

Danfoss

60-296.16

Danfoss

60-1032.10

15

12162813

7

9

13

14

Thermostat, Type KP

2. Automatic reset:

These units are automatically reset after operational stop.

Setting

Thermostats with automatic reset

Set the upper activating temperature on the range scale.

Set the dierential on the "DIFF" scale. The temperature setting on the range scale will then correspond to the
temperature at which the refrigeration compressor will be started on rising temperature. The compressor will be
stopped when the temperature has fallen in relation to the dierential setting.

Note that the dierential depends on the range setting. Therefore, the dierential scale must only be used as
guideline.

If with low stop temperature settings the compressor will not stop, check whether the dierential is set at too high a
value!

Thermostats with minimum reset

Set the stop temperature on the range scale. The dierential is a xed setting.

The compressor can be restarted by pressing the “Reset button” after the temperature on the thermostat sensor has
risen by a value equal to the xed dierential setting.

Thermostats with maximum reset

Set the stop temperature on the range scale. The dierential is a xed setting.

The compressor can be restarted by pressing the “Reset button” after the temperature on the thermostat sensor has
fallen to a value equal to the xed dierential setting.

Design and function

Figure 1: Key sketch of KP thermostat

Figure 2: KP thermostat

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