Submittal Sheet

ManualsBrandsDanfoss ManualsHVAC ControlsKPI36 SPDT Differential Pressue Switch

Data sheet

Pressure switch and Thermostat

KP and KPI

IC.PD.P10.F9.02 | 1

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

China Compulsory Certiﬁcate, CCC

(excluding boiler versions)

GOST (excluding KPI)

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)

• 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)

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.

Summary of content (16 pages)

PAGE 1
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.
PAGE 2
Data sheet | Pressure switch and Thermostat, KP and KPI Technical data Single pressure switch KP 35, KP 36 Ambient temperature [°C] Media temperature [°C] -40 – 65 °C (for max.
PAGE 3
Data sheet | Pressure switch and Thermostat, KP and KPI Ordering Pressure switch, types KP 35 and KP 36 Type KP 35 KP 36 Permissible Max. operating test Pressure pressure Pe pressure connection [bar] [bar] Setting range Pe Differential [bar] [bar] -0.2 – 7.5 0.7 – 4.0 17 22 G 1⁄4 A silver -0.2 – 7.5 -0.2 – 7.5 -0.2 – 7.5 0.7 – 4.0 0.7 – 4.0 0.7 – 4.0 17 17 17 22 22 22 G 1⁄4 A G 1⁄4 A G 1⁄4 A gold-plated silver silver 2.0– 14.0 0.7 – 4.0 17 22 G 1⁄4 A silver 2.0– 14.0 2.0– 14.0 4.
PAGE 4
Data sheet | Pressure switch and Thermostat, KP and KPI Contact system and application Switch type – single pole double throw Switch action SPDT Application 1. Terminal 1 – 4 close high and open low Terminal 1 – 2 can be used as low pressure alarm 1. Low pressure cut-out 2. Terminal 1 – 2 open high and close low Terminal 1 – 4 can be used as high pressure alarm 2. High pressure cut-out Setting Diff.
PAGE 5
Data sheet | Pressure switch and Thermostat, KP and KPI 4 3 1 13 2 12 8 1 5 2 4 13 2 3 1 4 1 9 5 10 6 7 12 Danfoss 60-972.13.10 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 Danfoss 60-973.13.
PAGE 6
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 84 Danfoss 60-9059.10 28 – 30 61 44 =14 Net weight approx. 0.3 kg IP55 enclosure Angle bracket Danfoss 60-221.13 Danfoss Danfoss 60-221.13 60-221.
PAGE 7
Data sheet | Pressure switch and Thermostat, KP and KPI Accessories for KP pressure switches Part Symbol Description Total Code no. Wall bracket for KP 1 060-105566 Angle bracket for KP 1 060-105666 Screwed cable entry PG 13.5 with special nut For 6 –14 mm diameter cables 1 060-105966 Sealing screw For sealing the setting on KP 2 060-105766 Top cover If a bracket is mounted on the backplate of the housing, the KP thermostats will have an IP44 grade of enclosure.
PAGE 8
Data sheet | Pressure switch and Thermostat, KP and KPI Technical data Dual pressure switch Ambient temperature [°C] Media temperature [°C] Fluid Parts in contact with fluid - 40 – 65 °C (for max. 2 hours up to 80 °C) Max.
PAGE 9
Data sheet | Pressure switch and Thermostat, KP and KPI Key contact system of KP 44 pressure switch 3 1. Lefthand pressure setting spindle 2. Differential setting spindle 3. Main arm 4. Righthand pressure setting spindle 5. Main spring 6. Differential spring 7. Bellows 8. Pressure connections 9. Contact system 10. Terminal 11. Earth terminal 12. Cable entry 13. Tumbler 14. Locking plate 15. Impulse lever © Danfoss | DCS (rm) | 2019.12 1 6 14 2 13 9 4 14 5 Danfoss 60-1175.12.
PAGE 10
Data sheet | Pressure switch and Thermostat, KP and KPI Setting 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 pressure has increased by min. 1 bar.
PAGE 11
Data sheet | Pressure switch and Thermostat, KP and KPI Technical data Single thermostat Ambient temperature [°C] Sensor material - 40 – 65 °C (for max.
PAGE 12
Data sheet | Pressure switch and Thermostat, KP and KPI 1 12 11 87 1 2 2 3 3 4 55 98 109 4 4 5 5 6 6 11 10 66 Danfoss 60-971.13.10 7 12 12 12 88 8 11 11 Danfoss 60-970.12.10 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 Key sketch of KP thermostat, types KP 78, KP 79, KP 81 Danfoss 60-970.12.
PAGE 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 44 Danfoss 60-298.16 61 14 84 Net weight approx. 0.4 kg IP55 enclosure KP 78, 79, 81 Sensor: Tinned copper Cu/Sn 5 Danfoss 60-435.13 Danfoss 60-663.11 KP 75 Sensor: Tinned copper Cu/Sn 5 Danfoss 60-221.13 © Danfoss | DCS (rm) | 2019.12 Danfoss Danfoss 60-221.13 60-221.13 Angle bracket Wall bracket IC.PD.P10.F9.
PAGE 14
Data sheet | Pressure switch and Thermostat, KP and KPI Accessories for KP thermostats Part Symbol Total Code no. Wall bracket for KP 1 060-105566 Angle bracket for KP 1 060-105666 Sensor holder Sensor holder for wall mounting with four capillary tube clips and 9-off 12 mm pins 1 017-420166 Screwed cable entry PG 13.
PAGE 15
Data sheet | Pressure switch and Thermostat, KP and KPI General information Gold contacts Contact material Gold-plated silver Contact system Contact load (when Au surface is burnt away) Single-pole double throw (SPDT) 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.
PAGE 16
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.