Danfoss KP135 Control Panel | Heating Control, Weather Compensation, 230V, 3 Outputs Specs

Danfoss KP135 Control Panel | Heating Control, Weather Compensation, 230V, 3 Outputs Specs

Danfoss KP135 control panel specifications. Advanced heating system controller with weather compensation, 230V supply, 3 outputs, programmable. For efficient boiler and HVAC control.

Product Overview

The Danfoss KP135​ is an advanced electronic control panel​ designed for efficient heating system management in residential and commercial buildings. This model features weather compensation control, operates on 230V AC, and provides three independent relay outputs​ for controlling boilers, pumps, and mixing valves. The "KP135" designation identifies this specific multi-functional controller in Danfoss's building automation product range. This intelligent panel optimizes heating system performance by adjusting supply water temperature based on outdoor conditions, improving comfort and reducing energy consumption.

Technical Specifications

Note: Specifications are based on typical Danfoss KP135 controller documentation. The assignable function of the three relays and specific programmable features are key characteristics of this model.

Key Features

• Weather Compensation:​ Automatically adjusts heating water temperature based on outdoor temperature via a configurable heating curve, improving efficiency.

• Dual Heating Circuit Control:​ Can control two independent heating zones (e.g., radiators and underfloor heating) with separate time programs and setpoints.

• Three Assignable Outputs:​ Flexible relay outputs can be configured to control boiler/pump, mixing valve 1, and mixing valve 2.

• Room Influence Function:​ Allows the room temperature to influence the calculated supply temperature for finer comfort control.

• 7-Day Programmability:​ Independent schedules for weekdays and weekends across two heating circuits.

• Legionella Protection:​ Can be programmed to periodically heat domestic hot water (if connected) to a high temperature to prevent bacterial growth.

• Summer/Winter Mode:​ Automatic or manual switching between heating and DHW-only operation.

• Frost Protection:​ Configurable frost protection for the building and heating system.

• Clear LCD Display:​ Shows system status, temperatures, setpoints, and active programs.

Wiring and Sensor Requirements

• Power:​ 230V AC mains connection (L, N, PE).

• Sensor Connections:​ Terminals for connecting the provided outdoor sensor (NTC) and an optional water temperature sensor (NTC).

• Load Connections:​ Three sets of relay terminals (NO, COM, NC) for connecting loads up to 5A/250V AC.

Typical Applications

• Residential Heating Systems:​ Control of gas/oil condensing boilers, heat pumps, or biomass boilers with multiple heating zones.

• Underfloor Heating Systems:​ As a master controller for mixing circuits, often with weather compensation.

• Combined Systems:​ Control of systems with both radiators (high temperature) and underfloor heating (low temperature).

• Commercial Building HVAC:​ Zone control for small commercial properties like offices, shops, or multi-family dwellings.

Important Technical Notes

1. Sensor Requirements:​ For weather compensation to function, the included outdoor temperature sensor must be installed​ in a shaded, north-facing location. An additional water sensor is required for certain system types (e.g., systems with a storage tank).

2. Voltage Compatibility:​ Designed for 230V AC, 50/60 Hz systems only.

3. Load Rating:​ Each relay output is rated for 5A resistive load. For controlling larger loads like boiler ignitors or circulator pumps via contactors, ensure the contactor coil current is within this limit.

4. Heating Curve Setting:​ Proper setup of the heating curve (slope) and parallel shift is crucial​ for system efficiency and comfort. This requires understanding of the building's heat loss characteristics and radiator/floor heating sizing.

5. Professional Setup:​ While user-friendly for daily operation, the initial commissioning and parameterization (heating curves, time programs, output assignments) typically require a qualified installer.

6. System Compatibility:​ Designed for standard wet (hydronic) heating systems. Ensure compatibility with the connected heat generator (boiler interface) and actuators (mixing valves).

Note: This data sheet provides general specifications for the Danfoss KP135 controller. For complete system design guidelines, wiring diagrams, detailed parameterization instructions, and safety information, consult the official Danfoss KP135 Installation and User Manual.