ENGINEERING TOMORROW 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. 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 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) 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: China Compulsory Certificate, CCC EN 60947-1, EN 60947-4-1, EN 60947-5-1 (excluding boiler versions) Underwriters Laboratories Inc., UL GOST (excluding KPI)

Data sheet | Pressure switch and Thermostat, KP and KPITechnical data Single pressure switch Description

Ordering Pressure switch, types KP 35 and KP 36 Type ') Available only in Asia market 2) IP55 transparent enclosure 3) Stainless steel version, IP55 non-transparent enclosure Pressure switch, types KPI 35 - KPI 38

Contact system and application Setting Note: For low pressure switches the restart pressure is equal to cut-out pressure plus differential value. pressure gauge. scale (range scale). High pressure limiters can be manually reset Pressure setting for switches with automatic when the pressure is equal to the stop pressure reset. minus the differential. 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...

Data sheet | Pressure switch and Thermostat, KP and KPI 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 1 4. Manual reset Key sketch of KP pressure switch Design / Function Key sketch of KPI pressure switch 2 Key sketch of KP pressure switch, boiler version 13 The contact system in KP pressure switches has a snap function. This means that the bellows is active only when the cut-in...

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 Net weight approx. 0.3 kg IP55 enclosure Angle bracket Wall bracket Dimensions [mm] and weights [kg] (Boiler version) Pressure switch, types KP 35 and KP 36 Pressure switch, type KP 34 Rubber Grommet for 6 – 14 mm cable Net weight approx. 0.34 kg © Danfoss | DCS (rm) | 2019.12 Rubber Grommet for 6 – 14 mm cable

Accessories for KP pressure switches Part Symbol Description Total Code no. Brackets with mounting screws and washers Screwed cable entry PG 13.5 with special nut For 6 -14 mm diameter cables Sealing screw For sealing the setting on KP If a bracket is mounted on the backplate of the housing, Top cover the KP thermostats will have an IP44 grade of enclosure. 1 The cover protects the setting spindles Protective cap 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...

Data sheet | Pressure switch and Thermostat, KP and KPI Technical data Dual pressure switch

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 Design / Function 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....

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. 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...

Data sheet | Pressure switch and Thermostat, KP and KPI Technical data Single thermostat

Data sheet | Pressure switch and Thermostat, KP and KPI 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 Design / Function 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. 6. Bellows 7. Sensor 13. Capillary tube Thermostats with automatic reset Set the upper...