Danfoss KP35 Control Panel | HVAC, Heating Control, Room Thermostat, 230V Specs

Danfoss KP35 Control Panel | HVAC, Heating Control, Room Thermostat, 230V Specs

Danfoss KP35 control panel specifications. Heating and HVAC control, room thermostat function, 230V supply, programmable. For building automation and temperature control.

Product Overview

The Danfoss KP35​ is a programmable electronic control panel​ designed for heating, ventilation, and air conditioning (HVAC) applications. This model serves as an advanced room thermostat and system controller, operating on 230V AC supply, and features programmable schedules for multiple time periods. The "KP35" designation identifies this specific controller in Danfoss's range of building automation products. This panel provides centralized control for heating systems, including boilers, pumps, and valves, optimizing comfort and energy efficiency in residential and commercial buildings.

Technical Specifications

Note: Specifications are based on typical Danfoss KP35 controller documentation. Features like the number of programmable periods and output types are standard for this model. Exact details should be verified with the specific product manual.

Key Features

• 7-Day Programmability:​ Allows different temperature schedules for each day of the week.

• Multiple Operating Modes:​ Includes Automatic (time program), Manual (constant setpoint), Holiday, and Frost Protection modes.

• Built-in and External Sensors:​ Uses internal room sensor and can connect to an external floor limit or outdoor temperature sensor for weather compensation.

• Large LCD Display:​ Clear readout of current time, temperature, setpoint, and operating mode.

• Energy Saving Functions:​ Automatic setback programming reduces energy consumption during unoccupied periods.

• Frost Protection:​ Built-in frost protection (7°C) to prevent pipe freezing.

• Holiday Mode:​ Allows extended setback periods for vacations.

• Child Lock:​ Prevents unauthorized changes to settings.

Wiring and Installation

• Typical Wiring:​ Requires connection to 230V mains (L, N, PE) and uses the changeover relay output to control a heating actuator, boiler, or pump.

• Mounting:​ Installs in a standard single-gang (86mm) European electrical back box.

• Sensor Connection:​ Terminal provided for connecting an optional external NTC sensor.

Typical Applications

• Residential Heating Control:​ Primary room thermostat for gas/oil boilers, heat pumps, or district heating substations.

• Underfloor Heating Control:​ As a master controller, often with an external floor sensor.

• Commercial Building HVAC:​ Zone control in offices, hotels, and apartment buildings.

• Radiator Heating Systems:​ Control of central heating circulator pumps or zone valves.

Important Technical Notes

1. Voltage Compatibility:​ Designed for 230V AC systems. Do not connect to 110V or other voltages.

2. Load Rating:​ The internal relay is rated for 5A resistive. Ensure the connected load (actuator, pump, boiler control input) does not exceed this rating. Inductive loads (contactors, motor starters) require appropriate derating or external relay.

3. Sensor Compatibility:​ The external sensor input is designed for a standard NTC temperature sensor (typically 15kΩ at 25°C). Verify the correct sensor type (Danfoss or compatible).

4. Installation Location:​ For accurate room temperature measurement, install in a representative location: about 1.5m above the floor, on an internal wall, away from direct sunlight, drafts, heat sources, and external walls.

5. Frost Protection:​ The built-in 7°C frost protection only works when the unit is powered. It is not a substitute for pipe trace heating or other frost protection in unused buildings.

6. Programming:​ The 7-day schedule with 3 periods per day offers flexibility. The user manual must be consulted for detailed programming steps.

Note: This data sheet provides general specifications for the Danfoss KP35 controller. For complete wiring diagrams, detailed programming instructions, safety information, and compatibility lists, consult the official Danfoss KP35 Installation and User Manual.