Danfoss ECL Comfort 210 / 296 / 310, A231 / A331 Installation Guide

Introduction

This document provides installation guidance for the Danfoss ECL Comfort 210, 296, 310, A231, and A331 controllers. It covers essential information regarding power connections, system schematics, electrical wiring, sensor inputs, communication interfaces, and installation procedures.

Power Connections

230 V AC Supply

Diagrams illustrate the 230V AC power connection, showing a standard plug being inserted into a socket. The controllers ECL 210/310 are designed for this voltage.

24 V AC Supply

Diagrams illustrate the 24V AC power connection for the controllers.

System Schematics

A231.1 System Diagram

Illustrates a basic system configuration for A231.1, showing the ECL 210/296/310 controller (A1) connected to sensor S1, actuators M1 and V1, and various control points (P1, P2, P3, S3, S5, S7, S8) connected to a heating element symbol.

A231.2 System Diagram

Shows a system schematic for A231.2, similar to A231.1, with connections to an ECL 210/296/310 controller (A1), sensors S1, S2, actuators M1, V1, and control points P1, P2, P3, P5, S3, S5, S7, S8, and a radiator.

A331.1 System Diagram

Presents a system schematic for A331.1, featuring an ECL 310 controller (A1) connected to sensors S1, S2, S10, actuators M1, V1, and control points P1, P2, P3, P5, S3, S5, S7, S8, and a radiator.

A331.2 System Diagram

Depicts a system schematic for A331.2, similar to A331.1, with connections to an ECL 310 controller (A1), sensors S1, S2, S10, actuators M1, V1, and control points P1, P2, P3, P5, S3, S5, S7, S8, and a radiator.

Electrical Wiring Diagrams

ECL Comfort 210/296/310: 230 V AC

Details electrical connections for ECL Comfort 210/296/310 with 230V AC supply. Includes relay output (R) ratings: 4(2) A / 230 V a.c., and transistor output (Tr) ratings: 0.2 A / 230 V a.c. Terminal connections for mains L/N are shown.

ECL 210: 230 V AC (A231.1/A231.2)

Wiring diagram for ECL 210 with 230V AC supply. Shows connections to terminals 1-16 (R1-R4, Tr1-Tr4) and V1, M1, P1, P2, P3, connected to mains L/N.

ECL 310: 230 V AC (A331.1/A331.2)

Wiring diagram for ECL 310 with 230V AC supply. Shows connections to terminals 1-19 (R1-R6, Tr1-Tr6) and V1, M1, P1, P2, P3, P5, connected to mains L/N.

ECL Comfort 210/296/310: 24 V AC

Details electrical connections for ECL Comfort 210/296/310 with 24V AC supply. Includes relay output (R) ratings: 4(2) A / 24 V a.c., and transistor output (Tr) ratings: 1 A / 24 V a.c. Terminal connections for mains L/N are shown.

ECL 210: 24 V AC (A231.1/A231.2)

Wiring diagram for ECL 210 with 24V AC supply. Shows connections to terminals 1-16 (R1-R4, Tr1-Tr4) and K4, M1, K1-K3, V1, P1-P3, connected to mains L/N.

ECL 310: 24 V AC (A331.1/A331.2)

Wiring diagram for ECL 310 with 24V AC supply. Shows connections to terminals 1-19 (R1-R6, Tr1-Tr6) and K4, M1, K1-K3, K5, V1, P1-P3, P5, connected to mains L/N.

Sensor and Input Connections

Pt 1000 Temperature Sensor

Diagrams show the connection of Pt 1000 temperature sensors (1000 Ω / 0°C) to ECL Comfort 210/296/310 controllers using terminals S1 and S2. Connections are shown for 230V AC supply (L, N, PE) and for specific models like A231.1/A231.2 and A331.1/A331.2.

Safety Thermostat

Diagram illustrates a safety thermostat connected to ECL 210 using terminals Tr1-Tr4 and M, ST, ST1, with 230V AC supply. Also shows Pt 1000 connection to ECL 210 via S1-S2.

Differential Pressure Sensor (ΔP)

Diagrams show differential pressure sensor connections to ECL 210 via terminals S1-S8 and to ECL 310 via terminals S1-S10.

0-10 V Output

Diagrams illustrate 0-10V output configurations for ECL 210 (using terminals S1-S8 and an 18V source) and ECL 310 (using terminals S1-S10 and a V d.c. source).

4-20 mA Output

Diagrams show 4-20 mA output configurations for ECL 210 (using terminals S1-S8, an 18V source, and a 500 Ω resistor) and ECL 310 (using terminals S1-S10, a V d.c. source, and a 500 Ω, 0.5W resistor).

Pressure (P) Input

Diagrams show pressure input configurations for ECL 210 (indicated by 'P', connected to terminals S1-S8) and ECL 310 (indicated by 'P', connected to terminals S1-S10).

Communication Interfaces

ECA 30/31 Connections

Diagrams show connections for ECA 30/31 modules (1-5) to an ESM-10 unit, which then interfaces with ECL 210/296/310 via ECL 485 (terminals S1, S2, A, B, S.Gnd, Modbus).

Master/Slave Configuration

Illustrates a master/slave communication setup using ECL 485, showing two sets of ECL 485 terminal connections (S1, S2, A, B, S.Gnd, Modbus) for inter-controller communication.

Modbus

Diagrams show Modbus communication connections for ECL 210/296/310 and ECL 296/310, utilizing terminals S1, S2, A, B, S.Gnd, and Modbus.

M-bus

Diagrams show M-bus communication connections for ECL 296/310, using terminals S1, A, B, S.Gnd, and M-bus (terminals 29-38). One diagram depicts two meters connected via M-bus to an ECL 296/310 controller.

Pt 1000 Data

Temperature vs. Resistance Table

Temperature vs. Resistance Graph

A graph illustrating the relationship between temperature (°C) on the x-axis and resistance (Ω) on the y-axis for a Pt 1000 sensor. The graph displays multiple lines, potentially representing different sensor types or calibration curves, labeled with values such as 1.8, 2.2, 2.6, 3.0, 3.4, 1.4, 1.0, 0.6, 0.2.

Installation Steps (ECA 30)

A step-by-step visual guide for installing the ECA 30 module is provided:

1. Shows the module dimensions (approx. 139 x 82 mm).
2. Illustrates mounting the base plate to a surface.
3. Shows connecting wires to the base plate terminals.
4. Depicts removing a protective cover from the module.
5. Illustrates connecting the module to the mounted base plate.
6. Shows connecting the external cable.
7. Depicts securing the module in place.
8. Shows the final installed appearance of the ECA 30 module.

Resources

For more information, visit the Danfoss heating website:

www.heating.danfoss.com

Video tutorials are available on YouTube:

https://www.youtube.com/user/DanfossHeating

Navigate to: -> Playlists -> How-to Videos -> District Energy installation videos