Danfoss ECL Comfort 310 Installation guide

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Installation Guide

ECL Comfort 310, application A361

1.0 Table of Contents

1.0 Table of Contents ............................................... 1

1.1

Important safety and product information. . . . . . . . . . . . . . . . . . . . . 2

2.0 Installation ........................................................ 4

2.1

Before you start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

2.2

Identifying the system type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

2.3

Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

2.4

Placing the temperature sensors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

2.5

Electrical connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

2.6

Inserting the ECL Application Key . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

2.7

Check list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

2.8

Navigation, ECL Application Key A361 . . . . . . . . . . . . . . . . . . . . . . . . . 31

6.0 Settings, circuit 2 ............................................. 75

6.1

Flow temperature. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

6.2

Return limit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80

6.3

Flow / power limit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83

6.4

Optimization. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86

6.5

Control parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90

6.6

Pump control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93

6.7

Refill water . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95

6.8

Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99

6.9

Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102

3.0 Daily use ......................................................... 34

3.1

How to navigate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

3.2

Understanding the controller display . . . . . . . . . . . . . . . . . . . . . . . . . . 35

3.3

What do the symbols mean?. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

3.4

Monitoring temperatures and system components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

3.5

Manual control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

3.6

Schedule . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

7.0 Common controller settings............................ 105

7.1

Introduction to ‘Common controller settings’ . . . . . . . . . . . . . . 105

7.2

Time & Date. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106

7.3

Holiday . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107

7.4

Input overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109

7.5

Log . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110

7.6

Output override. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111

7.7

Key functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112

7.8

System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113

4.0 Settings overview ............................................ 41

8.0 Miscellaneous ................................................ 115

8.1

Frequently asked questions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115

8.2

Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117

5.0 Settings, circuit 1 ............................................. 45

5.1

Flow temperature. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

5.2

Return limit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

5.3

Flow / power limit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

5.4

Optimization. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

5.5

Control parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

5.6

Pump control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

5.7

Refill water . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

5.8

Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68

5.9

Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

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Installation Guide ECL Comfort 310, application A361

1.1 Important safety and product information

1.1.1 Important safety and product information

This Installation Guide is associated with ECL Application Key A361

(order code no. 087H3804).

The functions can be realized with ECL Comfort 310.

The application A361 complies with ECL Comfort controller 310 as of software version 1.10 (visible at start-up of the controller and in

‘Common controller settings’ in ‘System’).

Additional documentation for ECL Comfort 210 and 310, modules and accessories is available on http://den.danfoss.com/.

Safety Note

To avoid injury of persons and damages to the device, it is absolutely necessary to read and observe these instructions carefully.

Necessary assembly, start-up, and maintenance work must be performed by qualified and authorized personnel only.

The warning sign is used to emphasize special conditions that should be taken into consideration.

This symbol indicates that this particular piece of information should be read with special attention.

As this Installation Guide covers several system types, special system settings will be marked with a system type. All system types are shown in the chapter: 'Identifying your system type'.

°C (degrees Celsius) is a measured temperature value whereas K

(Kelvin) is a number of degrees.

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Installation Guide ECL Comfort 310, application A361

The ID no. is unique for the selected parameter.

Example

11174

12174

First digit

1

-

1

-

Second digit

1

Circuit 1

2

Circuit 2

Last three digits

174

Parameter no.

174

Parameter no.

If an ID description is mentioned more than once, it means that there are special settings for one or more system types. It will be marked with the system type in question (e.g. 12174 - A266.9).

Disposal Note

This product should be dismantled and its components sorted, if possible, in various groups before recycling or disposal.

Always follow the local disposal regulations.

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Installation Guide ECL Comfort 310, application A361

2.0 Installation

2.1 Before you start

The application A361.1 is very flexible. These are the basic principles:

Heating (circuit 1 and 2):

Typically, the flow temperature is adjusted according to your requirements. The flow temperature sensor S3 (circuit 1) and

S4 (circuit 2) are the most important sensors. The desired flow temperatures at S3 and S4 are calculated in the ECL controller, based on the outdoor temperature (S1). The lower the outdoor temperature, the higher the desired flow temperature.

By means of a week schedule, the heating circuit can be in

‘Comfort’ or ‘Saving’ mode (two different temperature values for desired room temperature).

The motorized control valves M1 (circuit 1) and M2 (circuit 2) are opened gradually when the flow temperature is lower than the desired flow temperature and vice versa.

The return temperatures S5 (circuit 1) and S6 (circuit 2) to the district heating supply should not be too high. If so, the desired flow temperature can be adjusted (typically to a lower value), thus resulting in a gradual closing of the motorized control valves.

In boiler-based heating supply the return temperature should not be too low (same adjustment procedure as above).

Furthermore, the return temperature limitation can be dependent of the outdoor temperature. Typically, the lower the outdoor temperature, the higher the accepted return temperature.

The circulation pump in question is ON at heat demand or at frost protection.

The heating can be switched OFF when the outdoor temperature is higher than a selectable value.

The static pressure on the secondary side (consumer side) can 1) be measured as a 0 - 10 V signal (from a pressure transmitter) or

2) be a switch signal from a pressure switch. In case of a too low pressure, the refill water function will supplement with water from the supply side.

Typical A361.1 application:

S 1 ECL 310

R6

M1

P 4

M2

S 5

S 6

P S 7

S 3

P 1

P 2

S10

V1

S 4

P 3

P 5

P S 8

S 9

V2

The shown diagram is a fundamental and simplified example and does not contain all components that are necessary in a system.

All named components are connected to the ECL Comfort controller.

List of components:

S1 Outdoor temperature sensor

S3

S4

S5

S6

Flow temperature sensor, circuit 1

Flow temperature sensor, circuit 2

Return temperature sensor, circuit 1

Return temperature sensor, circuit 2

S7

S8

S9

Differential pressure switch, circuit 1

Differential pressure switch, circuit 2

Pressure transmitter or pressure switch, circuit 2

S10 Pressure transmitter or pressure switch, circuit 1

P1 Circulation pump, circuit 1

P2

P3

P4

P5

Circulation pump, circuit 1

Circulation pump, circuit 2

Refill water pump

Circulation pump, circuit 2

M1

M2

V1

Motorized control valve, circuit 1

Motorized control valve, circuit 2

V2

R6

Solenoid valve, circuit 1, refill water valve

Solenoid valve, circuit 2, refill water valve

Relay output, alarm

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Installation Guide ECL Comfort 310, application A361

Application A361.1 in general:

The circulation pumps P1 and P2 (circuit 1) / P3 and P5 ( circuit 2) work in shift according to a schedule. One pump is used as spare pump and the other pump is working. In case of malfunction

(missing differential pressure) of one pump, the other pump will take over. An alarm will be generated and the defective pump can be inspected / repaired.

Alarm (relay 6) can be activated if:

• The actual flow temperature differs from the desired flow temperature.

• The activated circulation pump does not generate a pressure difference.

• The refill water function does not generate a pressure within a preset time.

Modbus communication to a SCADA system can be established.

M-bus communication enables connection to flow or energy meter.

The controller can limit the flow or energy to a set maximum but also in relation to the outdoor temperature.

Furthermore, the M-bus data can be transferred to the Modbus communication.

Typical A361.1 application:

S 1 ECL 310

R6

M1

P 4

M2

S 5

S 6

P S 7

S 3

P 1

P 2

S10

V1

S 4

P 3

P 5

P S 8

S 9

V2

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Installation Guide ECL Comfort 310, application A361

The application A361.2 is very flexible. These are the basic principles:

Heating (circuit 1 and 2):

Typically, the flow temperature is adjusted according to your requirements. The flow temperature sensor S3 (circuit 1) and

S4 (circuit 2) are the most important sensors. The desired flow temperatures at S3 and S4 are calculated in the ECL controller, based on the outdoor temperature (S1). The lower the outdoor temperature, the higher the desired flow temperature.

The supply temperature (S2) is used to 1) control the S3 and S4 temperatures in relation to the S2 temperature or 2) maximize the limit of the desired flow temperature.

The factory setting, where the supply temperature (S2) determines the desired flow temperature, does not change the desired flow temperature according to ‘Comfort’ or ‘Saving’ mode.

However, if the supply temperature (S2) determines a max.

limitation of the desired flow temperature, the ‘Comfort’ and

‘Saving’ mode will have two different temperature values for desired room temperature.

The motorized control valves M1 (circuit 1) and M2 (circuit 2) are opened gradually when the flow temperature is lower than the desired flow temperature and vice versa.

The return temperatures S5 (circuit 1) and S6 (circuit 2) to the district heating supply should not be too high. If so, the desired flow temperature can be adjusted (typically to a lower value), thus resulting in a gradual closing of the motorized control valves.

In boiler-based heating supply the return temperature should not be too low (same adjustment procedure as above).

Furthermore, the return temperature limitation can be dependent of the outdoor temperature. Typically, the lower the outdoor temperature, the higher the accepted return temperature.

The circulation pump in question is ON at heat demand or at frost protection.

The heating can be switched OFF when the outdoor temperature is higher than a selectable value.

The static pressure on the secondary side (consumer side) can 1) be measured as a 0 - 10 V signal (from a pressure transmitter) or

2) be a switch signal from a pressure switch. In case of a too low pressure, the refill water function will supplement with water from the supply side.

Typical A361.2 application:

The shown diagram is a fundamental and simplified example and does not contain all components that are necessary in a system.

All named components are connected to the ECL Comfort controller.

List of components:

S1 Outdoor temperature sensor

S2

S3

S4

S5

S6

Supply flow temperature sensor

Flow temperature sensor, circuit 1

Flow temperature sensor, circuit 2

Return temperature sensor, circuit 1

Return temperature sensor, circuit 2

S7

S8

S9

Differential pressure switch, circuit 1

Differential pressure switch, circuit 2

Pressure transmitter or pressure switch, circuit 2

S10 Pressure transmitter or pressure switch, circuit 1

P1

P2

P3

P4

P5

Circulation pump, circuit 1

Circulation pump, circuit 1

Circulation pump, circuit 2

Refill water pump

Circulation pump, circuit 2

M1

M2

V1

V2

R6

Motorized control valve, circuit 1

Motorized control valve, circuit 2

Solenoid valve, circuit 1, refill water valve

Solenoid valve, circuit 2, refill water valve

Relay output, alarm

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Installation Guide ECL Comfort 310, application A361

Application A361.2 in general:

The circulation pumps P1 and P2 ( circuit 1) / P3 and P5 ( circuit 2) work in shift according to a schedule. One pump is used as spare pump and the other pump is working. In case of malfunction

(missing differential pressure) of one pump, the other pump will take over. An alarm will be generated and the defective pump can be inspected / repaired.

Alarm (relay 6) can be activated if:

• The actual flow temperature differs from the desired flow temperature.

• The activated circulation pump does not generate a pressure difference.

• The refill water function does not generate a pressure within a preset time.

Modbus communication to a SCADA system can be established.

M-bus communication enables connection to flow or energy meter.

The controller can limit the flow or energy to a set maximum but also in relation to the outdoor temperature.

Furthermore, the M-bus data can be transferred to the Modbus communication.

Typical A361.2 application:

The controller is pre-programmed with factory settings that are shown in the relevant chapters of this guide.

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Installation Guide ECL Comfort 310, application A361

2.2 Identifying the system type

Sketch your application

The ECL Comfort controller series is designed for a wide range of heating, domestic hot-water (DHW) and cooling systems with different configurations and capacities. If your system differs from the diagrams shown here, you may want to make a sketch of the system about to be installed. This makes it easier to use the Installation Guide, which will guide you step-by-step from installation to final adjustments before the end-user takes over.

The ECL Comfort controller is a universal controller that can be used for various systems. Based on the shown standard systems, it is possible to configure additional systems. In this chapter you find the most frequently used systems. If your system is not quite as shown below, find the diagram which has the best resemblance with your system and make your own combinations.

The circulation pump(s) in heating circuit(s) can be placed in the flow as well as the return. Place the pump according to the manufacturer’s specification.

A361.1

Indirectly connected heating systems with two-pump control and refill water function:

S 1 ECL 310

R6

P S 7

S 3

P 1

P 2

M1 S 5 S10

P 4

M2 S 6

V1

S 4

P 3

P 5

P S 8

S 9

V2

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Installation Guide ECL Comfort 310, application A361

A361.2

Indirectly connected heating systems with two-pump control and refill water function (supply temperature measurement gives further control / limitation possibilities):

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Installation Guide ECL Comfort 310, application A361

2.3 Mounting

2.3.1 Mounting the ECL Comfort controller

For easy access, you should mount the ECL Comfort controller near the system. Select one of the following methods using the same base part (code no. 087H3220):

• Mounting on a wall

• Mounting on a DIN rail (35 mm)

The ECL Comfort 310 is to be mounted in the ECL Comfort 310 base part.

Screws, PG cable glands and rawlplugs are not supplied.

Locking the ECL Comfort controller

In order to fasten the ECL Comfort controller to its base part, secure the controller with the locking pin.

Mounting on a wall

Mount the base part on a wall with a smooth surface. Establish the electrical connections and position the controller in the base part.

Secure the controller with the locking pin.

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Installation Guide ECL Comfort 310, application A361

Mounting on a DIN rail (35 mm)

Mount the base part on a DIN rail. Establish the electrical connections and position the controller in the base part. Secure the controller with the locking pin.

Dismounting the ECL Comfort controller

In order to remove the controller from the base part, pull out the locking pin by means of a screwdriver. The controller can now be removed from the base part.

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Installation Guide ECL Comfort 310, application A361

2.3.2 Mounting the Remote Control Units ECA 30/31

Select one of the following methods:

• Mounting on a wall, ECA 30 / 31

• Mounting in a panel, ECA 30

Screws and rawlplugs are not supplied.

Mounting on a wall

Mount the base part of the ECA 30 / 31 on a wall with a smooth surface. Establish the electrical connections. Place the ECA 30 /

31 in the base part.

Mounting in a panel

Mount the ECA 30 in a panel using the ECA 30 frame kit (order code no. 087H3236). Establish the electrical connections. Secure the frame with the clamp. Place the ECA 30 in the base part. The ECA

30 can be connected to an external room temperature sensor.

The ECA 31 must not be mounted in a panel if the humidity function is to be used.

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Installation Guide ECL Comfort 310, application A361

2.4 Placing the temperature sensors

2.4.1 Placing the temperature sensors

It is important that the sensors are mounted in the correct position in your system.

The temperature sensor mentioned below are sensors used for the ECL Comfort 210 and 310 series which not all will be needed for your application!

Outdoor temperature sensor (ESMT)

The outdoor sensor should be mounted on that side of the building where it is less likely to be exposed to direct sunshine. It should not be placed close to doors, windows or air outlets.

Flow temperature sensor (ESMU, ESM-11 or ESMC)

Place the sensor max. 15 cm from the mixing point. In systems with heat exchanger, Danfoss recommends that the ESMU-type to be inserted into the exchanger flow outlet.

Make sure that the surface of the pipe is clean and even where the sensor is mounted.

Return temperature sensor (ESMU, ESM-11 or ESMC)

The return temperature sensor should always be placed so that it measures a representative return temperature.

Room temperature sensor (ESM-10, ECA 30 / 31 Remote Control

Unit)

Place the room sensor in the room where the temperature is to be controlled. Do not place it on outside walls or close to radiators, windows or doors.

Boiler temperature sensor (ESMU, ESM-11 or ESMC)

Place the sensor according to the boiler manufacturer’s specification.

Air duct temperature sensor (ESMB-12 or ESMU types)

Place the sensor so that it measures a representative temperature.

DHW temperature sensor (ESMU or ESMB-12)

Place the DHW temperature sensor according to the manufacturer’s specification.

Slab temperature sensor (ESMB-12)

Place the sensor in a protection tube in the slab.

ESM-11: Do not move the sensor after it has been fastened in order to avoid damage to the sensor element.

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Installation Guide ECL Comfort 310, application A361

Pt 1000 temperature sensor (IEC 751B, 1000 Ω / 0 °C) Relationship between temperature and ohmic value:

°C Ω

1271

1309

1347

1385

1423

1461

1498

1535

1573

803

843

882

922

961

1000

1039

1078

1117

1155

1194

1232

70

80

90

100

110

120

130

140

150

0

10

20

30

40

50

60

-50

-40

-30

-20

-10

1600

1500

1400

1300

1200

1100

1000

900

800

-50 -25 0 25 50 75 100 125 150

° C

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Installation Guide ECL Comfort 310, application A361

2.5 Electrical connections

2.5.1 Electrical connections 230 V a.c. in general

The common ground terminal is used for connection of relevant components (pumps, motorized control valves).

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Installation Guide ECL Comfort 310, application A361

2.5.2 Electrical connections, 230 V a.c., power supply, pumps, motorized control valves etc.

Application A361.1 / A361.2

Terminal

19

18

17 P5

Description

Phase for circulation pump and alarm

Alarm

Circulation pump ON / OFF, circuit 2

16

15

14

Phase for circulation pump

P4 Refill water pump ON / OFF

Phase for circulation pumps

13

12

11

10

P3

P2

P1

Circulation pump ON / OFF, circuit 2

Circulation pump ON / OFF, circuit 1

Circulation pump ON / OFF, circuit 1

Supply voltage 230 V a.c. - neutral (N)

9

8

7

6

5

4

3

2

Supply voltage 230 V a.c. - live (L)

M1 Phase for motorized control valve output, circuit 1

M1 Actuator - opening

M1 Actuator - closing

M2 Phase for motorized control valve output, circuit 2

M2 Actuator - opening

M2 Actuator - closing

V1 Solenoid valve, circuit 1, refill water function

1 V2 Solenoid valve, circuit 2, refill water function

* Relay contacts: 4 A for ohmic load, 2 A for inductive load

Factory established jumpers:

5 to 8, 9 to 14, 14 to 16, 16 to 19, L to 5 and L to 9, N to 10

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Max. load

4 (2) A / 230 V a.c.*

4 (2) A / 230 V a.c.*

4 (2) A / 230 V a.c.*

4 (2) A / 230 V a.c.*

4 (2) A / 230 V a.c.*

4 (2) A / 230 V a.c.*

0.2 A / 230 V a.c.

0.2 A / 230 V a.c.

0.2 A / 230 V a.c.

0.2 A / 230 V a.c.

0.2 A / 230 V a.c.

0.2 A / 230 V a.c.

Danfoss District Energy

Installation Guide ECL Comfort 310, application A361

Wire cross section: 0.5 - 1.5 mm²

Incorrect connection can damage the electronic outputs.

Max. 2 x 1.5 mm² wires can be inserted into each screw terminal.

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Installation Guide ECL Comfort 310, application A361

2.5.3 Electrical connections, safety thermostats, 230 V a.c. or 24 V a.c.

With safety thermostat, circuit 1:

With safety thermostat, circuit 2:

Wire cross section: 0.5 - 1.5 mm²

Incorrect connection can damage the electronic outputs.

Max. 2 x 1.5 mm² wires can be inserted into each screw terminal.

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Installation Guide ECL Comfort 310, application A361

2.5.4 Electrical connections, 24 V a.c., power supply, pumps, motorized valves etc.

Application A361.1 / A361.2

ECL 310/24 V a .c.

R6

R5

R4

Tr3

Tr4

Tr5

R3

R2

R1

Tr1

Tr2

Tr6

N

L

19

18

17

16

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

K7 K6

M 2

M

M 1

M

K1

V2 V1

P 1

K2

P 2

K3

P 3

K4

P 4

K5

P 5

N

N

L

230 V a .c.

N

N

Terminal

19

18

17 K5

Description

Phase for circulation pump and alarm

Alarm

Circulation pump ON / OFF, circuit 2

16

15

14

Phase for circulation pump

K4 Refill water pump ON / OFF

Phase for circulation pumps

13

12

11

10

9

8

7

6

K3

K2

K1

M1

M1

Circulation pump ON / OFF, circuit 2

Circulation pump ON / OFF, circuit 1

Circulation pump ON / OFF, circuit 1

Supply voltage 24 V a.c. - neutral (N)

Supply voltage 24 V a.c. - live (L)

Phase for motorized control valve output, circuit 1

Actuator - opening

5

4

3

2

M1

M2

M2

M2

K6

Actuator - closing

Phase for motorized control valve output, circuit 2

Actuator - opening

Actuator - closing

Solenoid valve, V1, circuit 1, refill water function

1 K7 Solenoid valve, V2, circuit 2, refill water function

* Relay contacts: 4 A for ohmic load, 2 A for inductive load

Factory established jumpers:

5 to 8, 9 to 14, 14 to 16, 16 to 19, L to 5 and L to 9, N to 10

Danfoss District Energy VI.LG.M1.02

L

L

24 V a .c.

N

Max. load

4 (2) A / 24 V a.c.*

4 (2) A / 24 V a.c.*

4 (2) A / 24 V a.c.*

4 (2) A / 24 V a.c.*

4 (2) A / 24 V a.c.*

4 (2) A / 24 V a.c.*

1 A / 24 V a.c.

1 A / 24 V a.c.

1 A / 24 V a.c.

1 A / 24 V a.c.

1 A / 24 V a.c.

1 A / 24 V a.c.

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Installation Guide ECL Comfort 310, application A361

Wire cross section: 0.5 - 1.5 mm²

Incorrect connection can damage the electronic outputs.

Max. 2 x 1.5 mm² wires can be inserted into each screw terminal.

Do not connect 230 V a.c. powered components to a 24 V a.c. power supplied controller directly. Use auxilliary relays (K) to seperate 230

V a.c. from 24 V a.c.

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Installation Guide ECL Comfort 310, application A361

2.5.5 Electrical connections, Pt 1000 temperature sensors and signals

A361.1 / A361.2:

Terminal Sensor / description

29 and 30 S1 Outdoor temperature sensor*

28 and 30 S2 Supply flow temperature sensor**

27 and 30 S3 Flow temperature sensor***, circuit 1

26 and 30 S4 Flow temperature sensor***, circuit 2

25 and 30 S5 Return temperature sensor, circuit 1

24 and 30 S6 Return temperature sensor, circuit 2

23 and 30 S7 Differential pressure switch, circuit 1

22 and 30 S8 Differential pressure switch, circuit 2

21 and 30 S9 Pressure transmitter (0–10

V or 4–20 mA) or pressure switch, circuit 2

20 and 30 S10 Pressure transmitter (0–10

V or 4–20 mA) or pressure switch, circuit 1

Type

(recomm.)

ESMT

ESM-11 / ESMB /

ESMC / ESMU

ESM-11 / ESMB /

ESMC / ESMU

ESM-11 / ESMB /

ESMC / ESMU

ESM-11 / ESMB /

ESMC / ESMU

ESM-11 / ESMB /

ESMC / ESMU

* If the outdoor temperature sensor is not connected or the cable is short-circuited, the controller assumes that the outdoor temperature is 0 (zero) °C.

** Only for application A361.2.

*** The flow temperature sensor must always be connected in order to have the desired functionality. If the sensor is not connected or the cable is short-circuited, the motorized control valve closes (safety function).

Factory established jumper:

30 to common terminal.

Connection of 2 differential pressure switches

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Installation Guide ECL Comfort 310, application A361

Connection of a pressure transmitter with 0-10 V output

Example of a pressure transmitter connection to S10. Pressure transmitter can be connected in the same way to S9.

Connection of a pressure transmitter with 4-20 mA output

The 4-20 mA signal is converted to a 2-10 V signal by means of the

500 ohm resistor.

Example of a pressure transmitter connection to S10. Pressure transmitter can be connected in the same way to S9.

Connection of 2 pressure switches

Wire cross section for sensor connections: Min. 0.4 mm².

Total cable length: Max. 200 m (all sensors incl. internal ECL 485 communication bus)

Cable lengths of more than 200 m may cause noise sensibility (EMC).

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Installation Guide ECL Comfort 310, application A361

2.5.6 Electrical connections, ECA 30 / 31

Terminal

ECL 310

30

31

32

33

Terminal

ECA 30 /

31

4

1

4

5

2

3

Description

Twisted pair

Twisted pair

Ext. room temperature sensor*

Type

(recomm.)

Cable 2 x twisted pair

ESM-10

* After an external room temperature sensor has been connected,

ECA 30 / 31 must be repowered.

The communication to the ECA 30 / 31 must be set up in the ECL

Comfort controller in 'ECA addr.'

The ECA 30 /31 must be set up accordingly.

After application setup the ECA 30 / 31 is ready after 2–5 min. A progress bar in the ECA 30 / 31 is displayed.

ECA information message:

‘Application req. newer ECA’:

The software of your ECA does not comply with the software of your

ECL Comfort controller. Please contact your Danfoss sales office.

Some applications do not contain functions related to actual room temperature. The connected ECA 30 / 31 will only function as remote control.

Total cable length: Max. 200 m (all sensors incl. internal ECL 485 communication bus).

Cable lengths of more than 200 m may cause noise sensibility (EMC).

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Installation Guide ECL Comfort 310, application A361

2.5.7 Electrical connections, master / slave systems

The controller can be used as master or slave in master / slave systems via the internal ECL 485 communication bus (2 x twisted pair cable).

The ECL 485 communication bus is not compatible with the ECL bus in ECL Comfort 110, 200, 300 and 301!

Terminal Description Type

(recomm.)

30

31*

32

Common terminal

+12 V*, ECL 485 communication bus

33

A, ECL 485 communication bus

B, ECL 485 communication bus

Cable 2 x twisted pair

* Only for ECA 30 / 31 and master / slave communication

Total cable length: Max. 200 m (all sensors incl. internal ECL 485 communication bus).

Cable lengths of more than 200 m may cause noise sensibility (EMC).

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Installation Guide ECL Comfort 310, application A361

2.6 Inserting the ECL Application Key

2.6.1 Inserting the ECL Application Key

The ECL Application Key contains

• the application and its subtypes,

• currently available languages,

• factory settings: e.g. schedules, desired temperatures, limitation values etc. It is always possible to recover the factory settings,

• memory for user settings: special user / system settings.

After having powered-up the controller, different situations might be existing:

1. The controller is new from the factory, the ECL Application Key is not inserted.

2. The controller already runs an application. The ECL Application

Key is inserted, but the application needs to be changed.

3. A copy of the controllers settings is needed for configuring another controller.

User settings are, among others, desired room temperature, desired

DHW temperature, schedules, heat curve, limitation values etc.

System settings are, among others, communication set-up, display brightness etc.

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Installation Guide ECL Comfort 310, application A361

Application Key: Situation 1

The controller is new from the factory, the ECL Application Key is not inserted.

An animation for the ECL Application Key insertion is displayed.

Insert the Application Key .

Application Key name and Version is indicated (example: A266

Ver. 1.03).

If the ECL Application Key is not suitable for the controller, a "cross" is displayed over the ECL Application Key-symbol.

Action: Purpose:

Select language

Confirm

Select application

Confirm with ‘Yes’

Set 'Time & Date'

Turn and push the dial to select and change 'Hours', 'Minutes', 'Date',

'Month' and 'Year'.

Choose ''Next'

Confirm with ‘Yes’

Go to ‘Aut. daylight’

Choose whether ‘Aut. daylight´ * should be active or not

Examples:

YES or NO

* ‘Aut. daylight’ is the automatic changeover between summer and winter time.

Depending on the contents of the ECL Application Key, procedure

A or B is taking place:

A

The ECL Application key contains factory settings:

The controller reads / transfers data from the ECL Application Key to ECL controller.

The application is installed, and the controller resets and starts up.

B

The ECL Application key contains changed system settings:

Push the dial repeatedly.

’NO’: Only factory settings from the ECL Application Key will be copied to the controller.

’YES*: Special system settings (differing from the factory settings) will be copied to the controller.

If the key contains user settings:

Push the dial repeatedly.

‘NO: Only factory settings from the ECL Application Key will be copied to the controller.

‘YES*: Special user settings (differing from the factory settings) will be copied to the controller.

* If ‘YES’ cannot be chosen, the ECL Application Key does not contain any special settings.

Choose ‘Start copying’ and confirm with 'Yes'.

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Installation Guide ECL Comfort 310, application A361

Application Key: Situation 2

The controller already runs an application. The ECL Application

Key is inserted, but the application needs to be changed.

To change to another application on the ECL Application Key, the current application in the controller must be erased (deleted).

Be aware that the Application Key must be inserted.

Action: Purpose:

Choose ‘MENU’ in any circuit

Confirm

Choose the circuit selector at the top right corner in the display

Confirm

Choose ‘Common controller settings’

Confirm

Choose ‘Key functions’

Confirm

Choose ‘Erase application’

Examples:

Confirm with ‘Yes’

The controller resets and is ready to be configured.

Follow the procedure described in situation 1.

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Installation Guide ECL Comfort 310, application A361

Application Key: Situation 3

A copy of the controllers settings is needed for configuring another controller.

This function is used

• for saving (backup) of special user and system settings

• when another ECL Comfort controller of the same type (210 or

310) must be configured with the same application but user / system settings differ from the factory settings.

How to copy to another ECL Comfort controller:

*

‘ECL’:

‘KEY’:

Action: Purpose:

Choose ‘MENU’

Confirm

Choose the circuit selector at the top right corner in the display

Confirm

Choose 'Common controller settings'

Confirm

Go to ‘Key functions’

Examples:

Confirm

Choose ‘Copy’

Confirm

Choose ‘To’.

‘ECL’ or ‘KEY’ will be indicated. Choose

’ECL’ or KEY’

Push the dial repeatedly to choose copy direction

Choose ‘System settings’ or ‘User settings’

Push the dial repeatedly to choose

‘Yes’ or ‘No’ in ‘Copy’. Push to confirm.

*

’ECL’ or ‘KEY’.

**

‘NO’ or ‘YES’

Choose ‘Start copying’

The Application Key or the controller is updated with special system or user settings.

Data will be copied from the Application Key to the

ECL Controller.

Data will be copied from the ECL Controller to the

Application Key.

**

‘NO’:

‘YES’:

The settings from the ECL controller will not be copied to the Application Key or to the ECL Comfort controller.

Special settings (differing from the factory settings) will be copied to the Application Key or to the ECL Comfort controller. If YES can not be chosen, there are no special settings to be copied.

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Installation Guide ECL Comfort 310, application A361

2.6.2 ECL Application Key, copying data

General principles

When the controller is connected and operating, you can check and adjust all or some of the basic settings. The new settings can be stored on the Key.

How to update the ECL Application Key after settings have been changed?

All new settings can be stored on the ECL Application Key.

How to store factory setting in the controller from the

Application Key?

Please read the paragraph concerning Application Key, Situation

1: The controller is new from the factory, the ECL Application Key is not inserted.

How to store personal settings from the controller to the Key?

Please read the paragraph concerning Application Key, Situation 3:

A copy of the controllers settings is needed for configuring another controller

As a main rule, the ECL Application Key should always remain in the controller. If the Key is removed, it is not possible to change settings.

Factory settings can always be restored.

Make a note of new settings in the 'Settings overview' table.

Do not remove the ECL Application Key while copying. The data on the ECL Application Key can be damaged!

It is possible to copy settings from one ECL Comfort controller to another controller provided that the two controllers are from the same series (210 or 310).

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Installation Guide ECL Comfort 310, application A361

2.7 Check list

Is the ECL Comfort controller ready for use?

Make sure that the correct power supply is connected to terminals 9 (Live) and 10 (Neutral).

Check that the required controlled components (actuator, pump etc.) are connected to the correct terminals.

Check that all sensors / signals are connected to the correct terminals (see 'Electrical connections').

Mount the controller and switch on the power.

Is the ECL Application Key inserted (see 'Inserting the Application Key').

Is the correct language chosen (see 'Language' in 'Common controller settings').

Is the time & date set correctly (see 'Time & Date' in 'Common controller settings').

Is the right application chosen (see 'Identifying the system type').

Check that all settings in the controller (see 'Settings overview') are set or that the factory settings comply with your requirements.

Choose manual operation (see 'Manual control'). Check that valves open and close, and that required controlled components (pump etc.) start and stop when operated manually.

Check that the temperatures / signals shown in the display match the actual connected components.

Having completed the manual operation check, choose controller mode (scheduled, comfort, saving or frost protection).

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Installation Guide ECL Comfort 310, application A361

2.8 Navigation, ECL Application Key A361

Navigation, applications A361, circuit 1 and 2 (* application 361.2 only)

Home Circuit 1, Heating

ID no.

Function

MENU

Schedule

Settings Flow temperature

Return limit

Flow / power limit

Optimization

Control par.

Selectable

Heat curve

11178 Temp. max.

11177 Temp. min.

11300 High supp. T X2*

11301 High T max Y2*

11302 Low supply T X1*

11303 Low T max Y1*

11031 High T out X1

11032 Low limit Y1

11033 Low T out X2

11034 High limit Y2

11035 Infl. - max.

11036 Infl. - min.

11037 Adapt. time

11085 Priority

Actual

Limit

11119 High T out X1

11117 Low limit Y1

11118 Low T out X2

11116 High limit Y2

11112 Adapt. time

11113 Filter constant

11109 Input type

11115 Units

11011 Auto saving

11012 Boost

11013 Ramp

11014 Optimizer

11026 Pre stop

11021 Total stop

11179 Cut-out

11174 Motor pr.

11184 Xp

11185 Tn

11186 M run

11187 Nz

Circuit 2, Heating

ID no.

Function

Selectable

Heat curve

11178 Temp. max.

12177 Temp. min.

12300 High supp. T X2*

12301 High T max Y2*

12302 Low supply T X1*

12303 Low T max Y1*

12031 High T out X1

12032 Low limit Y1

12033 Low T out X2

12034 High limit Y2

12035 Infl. - max.

12036 Infl. - min.

12037 Adapt. time

12085 Priority

Actual

Limit

12119 High T out X1

12117 Low limit Y1

12118 Low T out X2

12116 High limit Y2

12112 Adapt. time

12113 Filter constant

12109 Input type

12115 Units

12011 Auto saving

12012 Boost

12013 Ramp

12014 Optimizer

12026 Pre stop

12021 Total stop

12179 Cut-out

12174 Motor pr.

12184 Xp

12185 Tn

12186 M run

12187 Nz

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Installation Guide ECL Comfort 310, application A361

Navigation, application A361, circuit 1 and circuit 2 continued

Home

MENU

Settings

Holiday

Alarm

Influence overview

Pump control

Refill water

Application

Temp. monitor.

Clear alarm

Alarm overview

Des. flow T

ID no.

11314

Circuit 1, Heating

Function

Chan.-over time

11310 Retry time

11313 Stab. time

11311 Change, duration

11312 Change time

11022 P exercise

Pressure

11327 Input type

11323 Time-out

11321 Pressure, des.

11322 Pressure, diff.

11320 P exercise

11325 Valve delay

11326 No. of pumps

11017 Demand offset

11023 M exercise

11052 DHW priority

11077 P frost T

11078 P heat T

11093 Frost pr. T

11141 Ext. input

11142 Ext. mode

11189 Min. act. time

Selectable

11147 Upper difference

11148 Lower difference

11149 Delay

11150 Lowest temp.

11315 Circ. pumps

11324 Refill water

Selectable

Return lim.

Flow / power lim.

Holiday

Ext. override

Boost

Ramp

Slave, demand

Heating cut-out

DHW priority

Circuit 2, Heating

ID no.

Function

12314 Chan.-over time

12310 Retry time

12313 Stab. time

12311 Change, duration

12312 Change time

12022 P exercise

Pressure

12327 Input type

12323 Time-out

12321 Pressure, des.

12322 Pressure, diff.

12320 P exercise

12325 Valve delay

12326 No. of pumps

12023 M exercise

12052 DHW priority

12077 P frost T

12078 P heat T

12093 Frost pr. T

12141 Ext. input

12142 Ext. mode

12189 Min. act. time

Selectable

12147 Upper difference

12148 Lower difference

12149 Delay

12150 Lowest temp.

12315 Circ. pumps

12324 Refill water

Selectable

Return lim.

Flow / power lim.

Holiday

Ext. override

Boost

Ramp

Heating cut-out

DHW priority

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Installation Guide ECL Comfort 310, application A361

Navigation, application A361, Common controller settings (* application A361.2 only)

Home

MENU

Time & Date

Holiday

Input overview 1

Input overview 2

Log 1 (sensors)

Log 2 (sensors)

Output override

Key functions

System

Outdoor T

Supply T*

Heating flow & des.

Heat return T & limit

Static pressure

Outdoor T

Supply T*

Heating flow & des.

Heat return T & limit

Static pressure

New application

Application

Factory setting

Copy

Key overview

ECL version

Common controller settings

ID no.

Function

Selectable

Selectable

Outdoor T

Supply T*

Heat flow T

Heat return T

Static pressure

S7 status

Outdoor T

Supply T*

Heat flow T

Heat return T

Static pressure

S8 status

Log today

Log yesterday

Log 2 days

Log 4 days

Log today

Log yesterday

Log 2 days

Log 4 days

M1, P1, P2, M2, P3, P5, V1, V2,

P4, A1

Erase application

System settings

User settings

Go to factory

To

System settings

User settings

Start copying

Code no.

Hardware

Software

Build no.

Serial no.

MAC

Production week

Extension

Ethernet

M-bus config

Energy Meters

Display

Communication

Language

Selectable

Selectable

60058 Backlight

60059 Contrast

38 Modbus addr.

2048 ECL 485 addr.

2150 Service pin

2151 Ext. reset

2050 Language

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3.0 Daily use

3.1 How to navigate

You navigate in the controller by turning the dial left or right to the desired position ( ).

The dial has a built-in accellerator. The faster you turn the dial, the faster it reaches the limits of any wide setting range.

The position indicator in the display ( ) will always show you where you are.

Push the dial to confirm your choices ( ).

The display examples are from a two-circuit application: One heating circuit ( ) and one domestic hot-water (DHW) circuit ( ).

The examples might differ from your application.

Heating circuit ( ): DHW circuit ( );

Some general settings which apply to the entire controller are located in a specific part of the controller.

To enter ‘Common controller settings’:

Action: Purpose:

Choose ‘MENU’ in any circuit

Examples:

Confirm

Choose the circuit selector at the top right corner in the display

Confirm

Choose ‘Common controller settings’

Confirm

Circuit selector

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3.2 Understanding the controller display

Choosing a favorite display

Your favorite display is the display you have chosen as the default display. The favorite display will give you a quick overview of the temperatures or units that you want to monitor in general.

If the dial has not been activated for 20 min., the controller will revert to the overview display you have chosen as favorite.

Change between displays by turning the dial until you reach the display selector ( ) at bottom right side of the display. Turn the dial and push to choose your favorite overview display.

Heating circuit

Overview display 1 informs about: actual outdoor temperature, controller mode, actual room temperature, desired room temperature.

Overview display 2 informs about: actual outdoor temperature, trend in outdoor temperature, controller mode, max. and min. outdoor temperatures since midnight as well as desired room temperature.

Overview display 1:

Overview display 3 informs about: date, actual outdoor temperature, controller mode, time, desired room temperature as well as shows the comfort schedule of the current day.

Overview display 4 informs about: state of the controlled components, actual flow temperature,

(desired flow temperature), controller mode, return temperature

(limitation value).

Dependent on the chosen display, the overview displays for the heating circuit inform you about:

• actual outdoor temperature (-0.5)

• controller mode ( )

• actual room temperature (24.5)

• desired room temperature (20.7 °C)

• trend in outdoor temperature ( )

• min. and max. outdoor temperatures since midnight ( )

• date (23.02.2010)

• time (7:43)

• comfort schedule of the current day (0 - 12 - 24)

• state of the controlled components (M2, P2)

• actual flow temperature (49 °C), (desired flow temperature (31))

• return temperature (24 °C) (limitation temperature (50))

Overview display 3:

Overview display 2:

Overview display 4:

The setting of the desired room temperature is important even if a room temperature sensor / Remote Control Unit is not connected.

Danfoss District Energy

If the temperature value is displayed as

"- -" the sensor in question is not connected.

"- - -" the sensor connection is short-circuited.

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Installation Guide ECL Comfort 310, application A361

Setting the desired temperature

Depending on the chosen circuit and mode, it is possible to enter all daily settings directly from the overview displays (see also the next page concerning symbols).

Setting the desired room temperature

The desired room temperature can easily be adjusted in the overview displays for the heating circuit.

Action: Purpose:

Desired room temperature

Confirm

Adjust the desired room temperature

Confirm

Examples:

20.5

21.0

This overview display informs about outdoor temperature, actual room temperature as well as desired room temperature.

The display example is for comfort mode. If you want to change the desired room temperature for saving mode, choose the mode selector and select saving.

The setting of the desired room temperature is important even if a room temperature sensor / Remote Control Unit is not connected.

Setting the desired room temperature, ECA 30 / ECA 31

The room desired temperature can be set exactly as in the controller. However, other symbols can be present in the display

(please see 'What do the symbols mean?').

With the ECA 30 / ECA 31 you can override the desired room temperature set in the controller temporarily by means of the override functions:

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3.3 What do the symbols mean?

Symbol Description

Outdoor temp.

Room temp.

DHW temp.

Position indicator

Scheduled mode

Temperature

Comfort mode

Saving mode

Mode

Frost protection mode

Manual mode

Heating

DHW

Common controller settings

Circuit

Pump ON

Pump OFF

Actuator opens

Actuator closes

Alarm

Display selector

Max. and min. value

Trend in outdoor temperature

Wind speed sensor

Controlled component

Symbol

7 -23

Description

Sensor not connected or not used

Sensor connection short-circuited

Fixed comfort day (holiday)

Active influence

No influence

Additional symbols, ECA 30 / 31:

Symbol Description

ECA Remote Control Unit

Relative humidity indoor

Day off

Holiday

Relaxing (extended comfort period)

Going out (extended saving period)

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3.4 Monitoring temperatures and system components

Heating circuit

The overview display in the heating circuit ensures a quick overview of the actual and (desired) temperatures as well as the actual state of the system components.

Display example:

49 °C Flow temperature

(31) Desired flow temperature

24 °C Return temperature

(50) Return temperature limitation

Input overview

Another option to get a quick overview of measured temperatures is the 'Input overview' which is visible in the common controller settings (how to enter the common controller settings, see

‘Introduction to common controller settings’.)

As this overview (see display example) only states the measured actual temperatures, it is read-only.

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3.5 Manual control

It is possible to manually control the installed components.

Manual control can only be selected in favorite displays in which the symbols for the controlled components (valve, pump etc.) are visible.

Action: Purpose:

Choose mode selector

Examples:

Confirm

Choose manual mode

Confirm

Choose pump

Confirm

Switch ON the pump

Switch OFF the pump.

Confirm pump mode

Choose motorized control valve

Confirm

Open the valve

Stop opening the valve

Close the valve

Stop closing the valve

Confirm valve mode

To leave manual control, use the mode selector to select the desired mode. Push the dial.

Manual control is typically used when commisioning the installation. The controlled components, valve, pump etc., can be controlled for correct function.

Controlled components Circuit selector

During manual operation, all control functions are deactivated. Frost protection is not active.

When manual control is selected for one circuit, it is automatically selected for all circuits!

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Installation Guide ECL Comfort 310, application A361

3.6 Schedule

3.6.1 Set your schedule

The schedule consists of a 7-day week:

M = Monday

T = Tuesday

W = Wednesday

T = Thursday

F = Friday

S = Saturday

S = Sunday

The schedule will day-by-day show you the start and stop times of your comfort periods (heating / DHW circuits).

Changing your schedule:

Action: Purpose:

Choose 'MENU' in any of the overview displays

Confirm

Examples:

Confirm the choice 'Schedule'

Choose the day to change

Confirm*

Go to Start1

Confirm

Adjust the time

Confirm

Go to Stop1, Start2 etc. etc.

Return to 'MENU'

Confirm

Choose 'Yes' or 'No' in 'Save'

Confirm

T

* Several days can be marked

The chosen start and stop times will be valid for all the chosen days

(in this example Thursday and Saturday).

You can set max. 3 comfort periods a day. You can delete a comfort period by setting start and stop times to the same value.

Each circuit has its own schedule. To change to another circuit, go to

'Home', turn the dial and choose the desired circuit.

The start and stop times can be set in half-hourly (30 min. ) intervals.

40 DEN-SMT/DK VI.LG.M1.02

Danfoss District Energy

Installation Guide ECL Comfort 310, application A361

4.0 Settings overview

It is recommendable to make a note of any changed settings in the empty columns.

Setting

Heat curve

Temp. max. (flow temp. limit, max.) — A361.1

Temp. min. (flow temp. limit, min.)

Heat curve

Temp. max. (flow temp. limit, max.) — A361.2

Temp. min. (flow temp. limit, min.)

High supp. T X2 (high value of supply temp.) — A361.2

High T max Y2 (high value of max limitation) — A361.2

Low supply T X1(low value of supply temp.) — A361.2

Low T max Y1 (low value of max limitation) — A361.2

High T out X1 (return temp. limitation, high limit, X-axis)

Low limit Y1 (return temp. limitation, low limit, Y-axis)

Low T out X2 (return temp. limitation, low limit, X-axis)

High limit Y2 (return temp. limitation, high limit, Y-axis)

Infl. - max. (return temp. limitation - max. influence)

Infl. - min. (return temp. limitation - min. influence)

Adapt. time (adaptation time)

Priority (priority for return temp. limitation)

High T out X1 (flow / power limitation, high limit, X-axis)

Low limit Y1 (flow / power limitation, low limit, Y-axis)

Low T out X2 (flow / power limitation, low limit, X-axis)

High limit Y2 (flow / power limitation, high limit, Y-axis)

Adapt. time (adaptation time)

Filter constant

Input type

Units

Auto saving (saving temp. dependent on outdoor temp.)

Boost

Ramp (reference ramping)

Optimizer (optimizing time constant)

Pre-stop (optimized stop time)

Total stop

Cut-out (limit for heating cut-out)

Motor pr. (motor protection)

Xp (proportional band)

Tn (integration time constant)

M run (running time of the motorized control valve)

Nz (neutral zone)

Chan.-over time (change-over time)

Retry time

Stab. time (stabilization time)

ID Page

1

45

11178

46

11177

46

47

90 °C

10 °C

11177

48

48

10 °C

11300

48

150 °C

11301

48

11302

49

95 °C

70 °C

11303

49

11031

50

50 °C

15 °C

11032

50

40 °C

11033

50

-15 °C

11034

51

60 °C

11035

51

11036

51

11037

51

11085

52

0.0

0.0

25 s

OFF

11119

11117

53

54

15 °C

999.9

l/h

11118

54

-15 °C

11116

11112

54

54

999.9

l/h

OFF

11113

54

11109

55

10

OFF

11115

55

l/h

11011

56

-15 °C

11012

56

OFF

11013

57

11014

57

11026

11021

58

58

11179

59

OFF

OFF

ON

OFF

11174

11184

60

60

20 °C

OFF

80 K

11185

11186

11187

60

60

61

11314

62

11310

62

11313

62

30 s

50 s

3 K

5 s

20 m

15 s

2

Factory settings in circuit(s)

3

Danfoss District Energy VI.LG.M1.02

DEN-SMT/DK 41

Setting

Change, duration

Change time (changeover time)

P exercise (pump exercise)

Pressure

Input type

Time-out

Pressure, des. (desired pressure)

Pressure, diff. (switching difference)

P exercise (pump exercise)

Valve delay

No. of pumps

Demand offset

M exercise (valve exercise)

DHW priority (closed valve / normal operation)

P frost T

P heat T (heat demand)

Frost pr. T (frost protection temperature)

Ext. input (external override) — A361.1 / A361.2

Ext. mode (external override mode)

Min. act. time (min. activation time gear motor)

Upper difference

Lower difference

Delay

Lowest temp.

Circ. pumps

Refill water

Heat curve

Temp. max. (flow temp. limit, max.) — A361.1

Temp. min. (flow temp. limit, min.)

Heat curve

Temp. max. (flow temp. limit, max.) — A361.2

Temp. min. (flow temp. limit, min.)

High supp. T X2 (high value of supply temp.) — A361.2

High T max Y2 (high value of max limitation) — A361.2

Low supply T X1(low value of supply temp.) — A361.2

Low T max Y1 (low value of max limitation) — A361.2

High T out X1 (return temp. limitation, high limit, X-axis)

Low limit Y1 (return temp. limitation, low limit, Y-axis)

Low T out X2 (return temp. limitation, low limit, X-axis)

High limit Y2 (return temp. limitation, high limit, Y-axis)

Infl. - max. (return temp. limitation - max. influence)

Infl. - min. (return temp. limitation - min. influence)

Adapt. time (adaptation time)

Priority (priority for return temp. limitation)

Installation Guide ECL Comfort 310, application A361

77

78

12177

78

12300

78

12301

78

12302

79

12303

79

12031

80

12032

80

12033

80

12034

81

12035

81

12036

81

12037

81

12085

82

ID Page

11311

63

11312

63

11022

63

64

11327

65

1

2

12

OFF

OFF

11323

65

20 s

11321

65

3.0 bar

11322

66

1.5 bar

11320

66

OFF

11325

66

1 s

11326

11017

11023

11052

68

11077

11078

11093

11147

72

11148

72

11149

11150

66

68

68

68

69

69

73

73

11315

73

1

OFF

OFF

OFF

2 °C

20 °C

10 °C

11141

70

OFF

11142

70

SAVING

11189

71

10

OFF

OFF

10 m

30 °C

11324

74

75

12178

76

12177

76

2

Factory settings in circuit(s)

3

90 °C

10 °C

10 °C

150 °C

95 °C

70 °C

50 °C

15 °C

40 °C

-15 °C

60 °C

0.0

0.0

25 s

OFF

42 DEN-SMT/DK VI.LG.M1.02

Danfoss District Energy

Installation Guide ECL Comfort 310, application A361

Setting

High T out X1 (flow / power limitation, high limit, X-axis)

Low limit Y1 (flow / power limitation, low limit, Y-axis)

Low T out X2 (flow / power limitation, low limit, X-axis)

High limit Y2 (flow / power limitation, high limit, Y-axis)

Adapt. time (adaptation time)

Filter constant

Input type

Units

Auto saving (saving temp. dependent on outdoor temp.)

Boost

Ramp (reference ramping)

Optimizer (optimizing time constant)

Pre-stop (optimized stop time)

Total stop

Cut-out (limit for heating cut-out)

Motor pr. (motor protection)

Xp (proportional band)

Tn (integration time constant)

M run (running time of the motorized control valve)

Nz (neutral zone)

Chan.-over time (change-over time)

Retry time

Stab. time (stabilization time)

Change, duration

Change time (changeover time)

P exercise (pump exercise)

Pressure

Input type

Time-out

Pressure, des. (desired pressure)

Pressure, diff. (switching difference)

P exercise (pump exercise)

Valve delay

No. of pumps

M exercise (valve exercise)

DHW priority (closed valve / normal operation)

P frost T

P heat T (heat demand)

Frost pr. T (frost protection temperature)

Ext. input (external override) — A361.1 / A361.2

Ext. mode (external override mode)

Min. act. time (min. activation time gear motor)

Upper difference

Lower difference

Danfoss District Energy

ID Page

12320

97

12325

97

12326

97

12023

99

12052

99

12077

99

12078

99

12093

100

12141

100

12142

101

12189

101

12147

102

12148

102

12187

91

12314

93

12310

93

12313

93

12311

94

12312

94

12022

94

95

12327

96

12323

96

12321

96

12322

97

12119

83

12117

84

12118

84

12116

84

12112

84

12113

84

12109

85

12115

85

12011

86

12012

86

12013

87

12014

87

12026

88

12021

88

12179

89

12174

90

12184

90

12185

90

12186

90

1

VI.LG.M1.02

OFF

OFF

2 °C

20 °C

10 °C

OFF

SAVING

OFF

20 s

3.0 bar

1.5 bar

OFF

1 s

1

3

OFF

OFF

20 °C

OFF

40 K

20 s

20 s

OFF

OFF

OFF

ON

OFF

3 K

5 s

20 m

15 s

2

12

OFF

2

Factory settings in circuit(s)

3

15 °C

999.9

l/h

-15 °C

999.9

l/h

OFF

10

OFF l/h

-15 °C

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Installation Guide ECL Comfort 310, application A361

Setting

Delay

Lowest temp.

Circ. pumps

Refill water

Backlight (display brightness)

Contrast (display contrast)

Modbus addr.

ECL 485 addr. (master / slave address)

Service Pin

Ext. reset

Language

ID Page

12149

103

12150

103

12315

103

12324

104

60058

113

60059

113

38

113

2048

114

2150

114

2151

114

2050

114

1 2

Factory settings in circuit(s)

3

10 m

30 °C

5

3

1

15

0

0

English

44 DEN-SMT/DK VI.LG.M1.02

Danfoss District Energy

Installation Guide ECL Comfort 310, application A361

5.0 Settings, circuit 1

5.1 Flow temperature

5.1.1 A361.1

The ECL Comfort controller determines and controls the flow temperature related to the outdoor temperature. This relationship is called the heat curve.

The heat curve is set by means of 6 coordinate points. The desired flow temperature is set at 6 pre-defined outdoor temperature values.

The shown value for the heat curve is an average value (slope), based on the actual settings.

Desired flow temperature

° C

110

100

80

60

40

20

C

B

A

-50 -40 -30 -20 -10 0 10 20

Outdoor temp.

-30 °C

-15 °C

-5 °C

0 °C

5 °C

15 °C

A

45 °C

40 °C

35 °C

32 °C

30 °C

25 °C

Desired flow temp.

B

75 °C

60 °C

50 °C

45 °C

40 °C

28 °C

C

95 °C

90 °C

80 °C

70 °C

60 °C

35 °C

Your settings

Adjust the desired flow temperature at -30, -15, -5, 0, 5, and 15 °C, if required.

A: Example for floor heating

B: Factory settings

C: Example for radiator heating (high demand)

Heat curve

Circuit

1

Setting range

Read-out only

Factory setting

Push the dial to enter / change the coordinates of the heat curve.

The heat curve represents the desired flow temperatures at different outdoor temperature and at a desired room temperature of 20 °C.

If the desired room temperature is changed, the desired flow temperature also changes:

(Desired room T - 20) × HC × 2.5

where "HC" is the Heat Curve slope and "2.5" is a constant.

The calculated flow temperature can be influenced by the ‘Boost’ and

‘Ramp’ functions etc.

Example:

Heat curve: 1.0

Desired flow temp.:

Desired room temp.:

50 °C

22 °C

Calculation (22–20) × 1.0 × 2.5 = 5

Result:

The desired flow temperature will be corrected from 50 °C to 55 °C.

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Installation Guide ECL Comfort 310, application A361

Max. limitation of the desired flow temperature:

In the application A361.1 the max. limitation value is selectable in ‘Temp. max.’.

Temp. max. (flow temp. limit, max.) — A361.1

Circuit Setting range

1 10 ... 150 °C

11178

Factory setting

90 °C

Set the max. flow temperature for the system. The desired flow temperature will not be higher than this setting. Adjust the factory setting, if required.

The setting for ‘Temp. max.’ has higher priority than ‘Temp. min.’.

Temp. min. (flow temp. limit, min.)

Circuit

1

Setting range

10 ... 150 °C

11177

Factory setting

10 °C

Set the min. flow temperature for the system. The desired flow temperature will not be lower than this setting. Adjust the factory setting, if required.

‘Temp. min.’ is overruled if 'Total stop' is active in Saving mode or

'Cut-out' is active.

‘Temp. min.’ can be overruled by the influence from the return temperature limitation (see 'Priority').

The setting for ‘Temp. max.’ has higher priority than ‘Temp. min.’.

46 DEN-SMT/DK VI.LG.M1.02

Danfoss District Energy

Installation Guide ECL Comfort 310, application A361

5.1.2 A361.2

The ECL Comfort controller determines and controls the flow temperature related to the supply temperature (S2). This relationship is set in the controller.

The heat curve is set in all coordinate points to the max. desired flow temperature (150 °C). The desired flow temperature will always be in relation to the supply temperature (S2).

The shown value for the heat curve is an average value (slope), based on the actual settings.

Outdoor temp.

-30 °C

-15 °C

-5 °C

0 °C

5 °C

15 °C

Factory setting

150 °C

150 °C

150 °C

150 °C

150 °C

150 °C

Your settings

Adjust the desired flow temperature at -30, -15, -5, 0, 5, and 15 °C, if required.

Heat curve

Circuit

1

Setting range

Read-out only

Factory setting

Desired flow temperature

°C

Y 2

Y1

X1

The factory setting (a general desired flow temperature of 150 °C) is limited to a max. value based on the supply temperature (S2) and the settings in parameters ‘High supp. T X2’, ‘High T max Y2’, ‘Low supply T X1’ and ‘Low T max Y1’.

Desired flow temperature

°C

9 5

50

58

70

85

X2

150

°C Supply temp. (S2)

°C Supply temp. (S2)

Danfoss District Energy

The above heat curve is an example of a supply temperature (S2) of

85 °C. The desired flow temperature (58 °C) is based on the set-up of the relationship between the supply temperature (S2) and the desired flow temperature.

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Installation Guide ECL Comfort 310, application A361

Max. limitation of the desired flow temperature:

In the application A361.2 the desired flow temperature or max.

limitation value depends on the supply temperature (S2). The relationship is set in the four settings ‘High supp. T X2’, ‘High T max

Y2’, ‘Low supply T X1’ and ‘Low T max Y1’.

When setting the heat curve coordinates as described in the section 'A361.1’, the desired flow temperature can be limited to a maximum according to the supply temperature (S2).

Temp. max. (flow temp. limit, max.) — A361.2

Circuit Setting range

1 Read-out only

Factory setting

The supply temperature (S2) determines the desired flow temperature. The value is calculated on basis of the settings in the following parameters: 'High supp. T X2', 'High T max Y2', 'Low supply T X1' and 'Low T max Y1'.

Temp. min. (flow temp. limit, min.)

Circuit

1

Setting range

10 ... 150 °C

11177

Factory setting

10 °C

Set the min. flow temperature for the system. The desired flow temperature will not be lower than this setting. Adjust the factory setting, if required.

‘Temp. min.’ is overruled if 'Total stop' is active in Saving mode or

'Cut-out' is active.

‘Temp. min.’ can be overruled by the influence from the return temperature limitation (see 'Priority').

The setting for ‘Temp. max.’ has higher priority than ‘Temp. min.’.

High supp. T X2 (high value of supply temp.) — A361.2

Circuit Setting range

11300

Factory setting

1 10 ... 150 °C 150 °C

Set the high value for the supply temperature in relation to the desired max. flow temperature. When the supply temperature is above the set value, the max. limitation of the flow temperature is the Y2 value. When the supply temperature is below the set value, the max. limitation of the flow temperature will be lower.

High T max Y2 (high value of max limitation) — A361.2

Circuit

1

Setting range

10 ... 150 °C

11301

Factory setting

95 °C

Set the high value for the max. limitation of the desired flow temperature.

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Danfoss District Energy

Installation Guide ECL Comfort 310, application A361

Low supply T X1(low value of supply temp.) — A361.2

Circuit

1

Setting range

10 ... 150 °C

11302

Factory setting

70 °C

Set the low value for the supply temperature in relation to the desired max. flow temperature. When the supply temperature is below the set value, the max. limitation of the flow temperature is the Y1 value. When the supply temperature is above the set value, the max. limitation of the flow temperature will be higher.

Low T max Y1 (low value of max limitation) — A361.2

Circuit Setting range

11303

Factory setting

1 10 ... 150 °C 50 °C

Set the low value for the max. limitation of the desired flow temperature.

Set-up procedure when the supply temperature (S2) has to limit the desired flow temperature to a maximum:

1. Choose ‘Heat curve’.

2. Set the desired flow temperature in all 6 coordinates (-30 °C, -15

°C etc.) to the desired values.

Result:

The desired flow temperature will be in relation to the outdoor temperature but will be limited to a maximum according the settings in ‘High supp. T X2’, ‘High T max Y2’, ‘Low supply T X1’ and

‘Low T max Y1’.

The example shows the max. limitation of the desired flow temperature when the supply temperature (S2) is 105 °C.

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Installation Guide ECL Comfort 310, application A361

5.2 Return limit

The return temperature limitation is based on the outdoor temperature. Typically in district heating systems a higher return temperature is accepted at a decrease in outdoor temperature. The relationship between the return temperature limits and outdoor temperature is set in two coordinates.

The outdoor temperature coordinates are set in 'High T out X1' and 'Low T out X2'. The return temperature coordinates are set in

'High limit Y2' and 'Low limit Y1'.

The controller automatically changes the desired flow temperature to obtain an acceptable return temperature when the return temperature falls below or gets higher than the calculated limit.

This limitation is based on a PI regulation where P ('Infl.' factor) responds quickly to deviations and I ('Adapt. time') responds slower and over time removes the small offsets between the desired and actual values. This is done by changing the desired flow temperature.

Influence

Return temperature limitation

° C

High limit Y2

60

Low limit Y1

40

-15 15

Low T out X2 High T out X1

° C

Outdoor temp.

‘Infl. - min.’ > 0

‘Limit’

‘Infl. - max.’ > 0

Return temperature

‘Infl. - max.’ < 0

‘Infl. - min.’ < 0

High T out X1 (return temp. limitation, high limit, X-axis)

Circuit

1

Setting range

-60 ... 20 °C

11031

Factory setting

15 °C

Set the outdoor temperature for the low return temperature limitation.

The corresponding Y coordinate is set in 'Low limit Y1'.

Low limit Y1 (return temp. limitation, low limit, Y-axis)

Circuit Setting range

11032

Factory setting

1 10 ... 150 °C 40 °C

Set the return temperature limitation referring to the outdoor temperature set in 'High T out X1'.

The corresponding X coordinate is set in 'High T out X1'.

Low T out X2 (return temp. limitation, low limit, X-axis)

Circuit Setting range

11033

Factory setting

1 -60 ... 20 °C -15 °C

Set the outdoor temperature for the high return temperature limitation.

The corresponding Y coordinate is set in 'High limit Y2'.

50 DEN-SMT/DK VI.LG.M1.02

If the ‘Infl.’ factor is too high and / or the ‘Adapt. time’ too low, there is a risk of unstable control.

Danfoss District Energy

Installation Guide ECL Comfort 310, application A361

High limit Y2 (return temp. limitation, high limit, Y-axis)

Circuit

1

Setting range

10 ... 150 °C

11034

Factory setting

60 °C

Set the return temperature limitation referring to the outdoor temperature set in 'Low T out X2'.

The corresponding X coordinate is set in 'Low T out X2'.

Infl. - max. (return temp. limitation - max. influence)

Circuit

1

Setting range

-9.9 ... 9.9

11035

Factory setting

0.0

Determines how much the desired flow temperature will be influenced if the return temperature is higher than the calculated limit.

Influence higher than 0:

The desired flow temperature is increased, when the return temperature gets higher than the calculated limit.

Influence lower than 0:

The desired flow temperature is decreased, when the return temperature gets higher than the calculated limit.

Example

The return limit is active above 50 °C.

The influence is set to -2.0.

The actual return temperature is 2 degrees too high.

Result:

The desired flow temperature is changed by -2.0 x 2 = -4.0 degrees.

Normally, this setting is lower than 0 in district heating systems to avoid a too high return temperature.

Typically, this setting is 0 in boiler systems because a higher return temperature is acceptable (see also 'Infl. - min.').

Infl. - min. (return temp. limitation - min. influence)

Circuit

1

Setting range

-9.9 ... 9.9

11036

Factory setting

0.0

Determines how much the desired flow temperature will be influenced if the return temperature is lower than the calculated limit.

Influence higher than 0:

The desired flow temperature is increased, when the return temperature gets below the calculated limit.

Influence lower than 0:

The desired flow temperature is decreased, when the return temperature gets below the calculated limit.

Example

The return limit is active below 50 °C.

The influence is set to -3.0.

The actual return temperature is 2 degrees too low.

Result:

The desired flow temperature is changed by -3.0 x 2 = -6.0 degrees.

Normally, this setting is 0 in district heating systems because a lower return temperature is acceptable.

Typically, this setting is higher than 0 in boiler systems to avoid a too low return temperature (see also 'Infl. - max.').

Adapt. time (adaptation time)

Circuit Setting range

11037

Factory setting

1 OFF / 1 ... 50 s

Controls how fast the return temperature adapts to the desired return temperature limit (I control).

25 s

OFF: The control function is not influenced by the ‘Adapt.

time’.

1: The desired temperature is adapted quickly.

50: The desired temperature is adapted slowly.

The adaptation function can correct the desired flow temperature with max. 8 K.

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Installation Guide ECL Comfort 310, application A361

Priority (priority for return temp. limitation)

Circuit

1

Setting range

OFF / ON

11085

Factory setting

OFF

Choose whether the return temperature limitation should overrule the set min. flow temperature ‘Temp. min.’ .

ON: The min. flow temperature limit is overruled.

OFF: The min. flow temperature limit is not overruled.

52 DEN-SMT/DK VI.LG.M1.02

Danfoss District Energy

Installation Guide ECL Comfort 310, application A361

5.3 Flow / power limit

A flow or energy meter can be connected to the ECL controller in order to limit the flow or consumed power. The signal from the flow or energy meter is based on M-bus signal.

The flow / power limitation can be based on the outdoor temperature. Typically, in district heating systems a higher flow or power is accepted at lower outdoor temperatures.

The relationship between the flow or power limits and the outdoor temperature is set in two coordinates.

The outdoor temperature coordinates are set in 'High T out X1' and 'Low T out X2'.

The flow or power coordinates are set in 'Low limit Y1' and 'High limit Y2'. Based on these settings, the controller calculates the limitation value.

When the flow / power gets higher than the calculated limit, the controller gradually reduces the desired flow temperature to obtain an acceptable max. flow or power consumption.

High limit Y2

Low limit Y1

Flow / power limitation

Flow / power limitation

-15 15

Low T out X2 High T out X1

° C

Outdoor temp.

Limit

Desired flow temp.

° C

Time

If the ‘Adapt. time’ is too high, there is a risk of unstable control.

Actual (actual flow or power)

Circuit

1

Setting range

Read-out only

11110

Factory setting

The value is the actual flow or power based on the signal from flow / energy meter, converted in the controller.

Limit (limitation value)

Circuit

1

Setting range

Read-out only

The value is the calculated limitation value.

11111

Factory setting

High T out X1 (flow / power limitation, high limit, X-axis)

Circuit Setting range

11119

Factory setting

1 -60 ... 20 °C 15 °C

Set the outdoor temperature for the low flow / power limitation.

The corresponding Y coordinate is set in 'Low limit Y1'.

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Installation Guide ECL Comfort 310, application A361

Low limit Y1 (flow / power limitation, low limit, Y-axis)

Circuit

1

Setting range

0.0 ... 999.9 l/h

11117

Factory setting

999.9 l/h

Set the flow / power limitation referring to the outdoor temperature set in

'High T out X1'.

The corresponding X coordinate is set in 'High T out X1'.

The limitation function can overrule the set 'Temp. min' of the desired flow temperature.

Low T out X2 (flow / power limitation, low limit, X-axis)

Circuit Setting range

11118

Factory setting

1 -60 ... 20 °C -15 °C

Set the outdoor temperature for the high flow / power limitation.

The corresponding Y coordinate is set in 'High limit Y2'.

High limit Y2 (flow / power limitation, high limit, Y-axis)

Circuit Setting range

11116

Factory setting

1 0.0 ... 999.9 l/h 999.9 l/h

Set the flow / power limitation referring to the outdoor temperature set in 'Low T out X2'.

The corresponding X coordinate is set in 'Low T out X2'.

Adapt. time (adaptation time)

Circuit

1

Setting range

OFF / 1 ... 50 s

11112

Factory setting

Controls how fast the flow / power limitation adapts to the desired limitation.

OFF

OFF: The control function is not influenced by the ‘Adapt.

time’.

1: The desired temperature is adapted slowly.

50: The desired temperature is adapted quickly.

1:

2:

50:

Filter constant

Circuit

1

Setting range

1 ... 50

11113

Factory setting

The actual filter dampens the flow / power input data by the set factor.

10

No filtering.

Fast (low filter constant)

Slow (high filter constant)

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Input type

Circuit

1

Setting range

OFF / EM1 ... EM5

Choice of M-bus signal from energy meter number 1 ... 5.

11109

Factory setting

OFF

OFF: No M-bus signal acquired.

EM1 ... EM5: Energy meter number.

Units

Circuit

1

Choice of units for measured values.

Setting range

See the list

Flow values are expressed as l/h or m³/h

Power values are expressed as kW, MW or GW.

11115

Factory setting l/h

List for setting range of 'Units': l/h m³/h kW

MW

GW

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5.4 Optimization

Auto saving (saving temp. dependent on outdoor temp.)

Circuit

1

Setting range

OFF / -29 ... 10 °C

11011

Factory setting

-15 °C

Below the set value for the outdoor temperature, the saving temperature setting has no influence. Above the set value for the outdoor temperature, the saving temperature relates to the actual outdoor temperature. The function is relevant in district heating installations in order to avoid a big change in the desired flow temperature after a saving period.

OFF: The saving temperature does not depend on the outdoor temperature.

-29 ... 10: The saving temperature depends on the outdoor temperature. When the outdoor temperature is above

10 °C, the reduction is 100%. The lower the outdoor temperature, the less the temperature reduction. When the outdoor temperature is below the set limit, there is no temperature reduction.

The comfort and the saving temperatures are set in the display overviews. The difference between the comfort and the saving temperature is considered to be 100%. Depending on the outdoor temperature, the percentage value can be lower according to the set value in ‘Auto saving’.

Reduction

100%

0%

-29 -20 -10 0 10 20

Auto saving

Outdoor temp. °C

Example:

Outdoor temp.: –5 °C

Desired room temp. in Comfort mode: 22 °C

Desired room temp. in Saving mode: 16 °C

Setting in ‘Auto saving’: –15 °C

The drawing above illustrates that the reduction percentage at an outdoor temperature of –5 °C is 40%.

The difference between Comfort and Saving temperature is (22–16)

= 6 degrees.

40% of 6 degrees = 2.4 degrees

The ‘Auto saving’ temperature is corrected to (22–2.4) = 19.6 °C.

Boost

Circuit

1

Setting range

OFF / 1 ... 99%

11012

Factory setting

OFF

Shortens the heating-up period by increasing the desired flow temperature by the percentage you set.

OFF: The boost function is not active.

1-99%: The desired flow temperature is increased temporarily with the set percentage.

In order to shorten the heating-up period after a saving temperature period, the desired flow temperature can be increased temporarily (max. 1 hour). At optimizing the boost is active in the optimization period ('Optimizer').

If a room temperature sensor or an ECA 30 / 31 is connected, the boost stops when the room temperature is reached.

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Temp. °C

Ramp (reference ramping)

Circuit

1

Setting range

OFF / 1 ... 99 m

11013

Factory setting

The time (minutes) in which the desired flow temperature increases gradually to avoid load peaks in the heat supply.

OFF

OFF: The ramping function is not active.

1-99 m: The desired flow temperature is increased gradually with the set minutes.

In order to avoid load peaks in the supply network, the flow temperature can be set to increase gradually after a period with saving temperature. This causes the valve to open gradually.

Ramping time

Time (min.)

Optimizer (optimizing time constant)

Circuit

1

Setting range

OFF / 10 ... 59

11014

Factory setting

OFF

Optimizes the start and stop times for the comfort temperature period to obtain the best comfort at the lowest energy consumption.

The lower the outdoor temperature, the earlier the heating cut-in. The lower the outdoor temperature, the later the heating cut-out.

The optimized heating cut-out time can be automatic or disabled. The calculated start and stop times are based on the setting of the optimizing time constant.

Adjust the optimizing time constant.

The value consists of a two digit number. The two digits have the following meaning (digit 1 = Table I, digit 2 = Table II).

OFF: No optimization. The heating starts and stops at the times set in the schedule.

10 ... 59: See tables I and II.

Table I:

Left digit

1-

2-

3-

4-

5-

Table II:

Right digit

-0

-1

·

-5

·

-9

Heat accumulation of the building light medium heavy medium heavy

System type

Radiator systems

Floor heating systems

Dimensioning temperature

-50 °C

-45 °C

·

-25 °C

·

-5 °C

Capacity large

·

· normal

· small

Dimensioning temperature:

The lowest outdoor temperature (usually determined by your system designer in connection with the design of the heating system) at which the heating system can maintain the designed room temperature.

Example

The system type is radiator, and the heat accumulation of the building is medium.

The left digit is 2.

The dimensioning temperature is -25 °C, and the capacity is normal.

The right digit is 5.

Result:

The setting is to be changed to 25.

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Pre-stop (optimized stop time)

Circuit

1

Disable the optimized stop time.

OFF:

ON:

Setting range

OFF / ON

The optimized stop time is disabled.

The optimized stop time is enabled.

11026

Factory setting

ON

Example: Optimization of Comfort from 07:00 - 22:00

07:00 22:00

Schedule

Pre-stop OFF

Pre-stop ON

Optimization stop Optimization start

Total stop

Circuit

1

Setting range

OFF / ON

11021

Factory setting

OFF

Decide whether you want a total stop during the saving temperature period.

OFF: No total stop. The desired flow temperature is reduced according to:

• desired room temperature in saving mode

• auto saving

ON: The desired flow temperature is lowered to the set value in ‘Frost pr.’ The circulation pump is stopped but frost protection is still active, see 'P frost T'.

Desired flow temp. °C

Desired flow temp. °C

Total stop = ON

‘Frost pr.’

Time

Total stop = OFF

‘Frost pr.’

Time

The min. flow temperature limitation ('Temp. min.') is overruled when

'Total stop' is ON.

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Cut-out (limit for heating cut-out)

Circuit

1

Setting range

OFF / 1 ... 50 °C

11179

Factory setting

20 °C

The heating can be switched OFF when the outdoor temperature is higher than the set value. The valve closes and after the post-run time, the heating circulation pump stops. ‘Temp. min.’ will be overruled.

The heating system switches ON again when the outdoor temperature and the accumulated (filtered) outdoor temperature become lower than the set limit.

This function can save energy.

Set the value for outdoor temperature at which you want the heating system to switch OFF.

Temp.

1 8 °C

Actual outdoor temp.

Accumulated outdoor temp.

Heating ON Heating OFF Heating ON

Time

The heating cut-out is only active when the controller mode is in scheduled operation. When the cut-out value is set to OFF, there is no heating cut-out.

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5.5 Control parameters

Motor pr. (motor protection)

Circuit Setting range

11174

Factory setting

1 OFF / 10 ... 59 m OFF

Prevents the controller from unstable temperature control (and resulting actuator oscillations). This can occur at very low load. The motor protection increases the lifetime of all involved components.

OFF: Motor protection is not activated.

10 ... 59: Motor protection is activated after the set activation delay in minutes.

Recommended for heating systems with variable load.

Xp (proportional band)

Circuit

1

Setting range

5 ... 250 K

11184

Factory setting

80 K

Set the proportional band. A higher value will result in a stable but slow control of the flow temperature.

Tn (integration time constant)

Circuit

1

Setting range

1 ... 999 s

11185

Factory setting

30 s

Set a high integration time constant (in seconds) to obtain a slow but stable reaction to deviations.

A low integration time constant will make the controller react fast but with less stability.

M run (running time of the motorized control valve)

Circuit

1

Setting range

5 ... 250 s

11186

Factory setting

50 s

‘M run’ is the time in seconds it takes the controlled component to move from fully closed to fully open position. Set the ‘M run’ according to the examples or measure the running time by means of a stop watch.

How to calculate the running time of a motorized control valve

The running time of the motorized control valve is calculated using the following methods:

Seated valves

Running time = Valve stroke (mm) x actuator speed (sec. / mm)

Example: 5.0 mm x 15 sec. / mm = 75 sec.

Rotating valves

Running time = Turning degrees x actuator speed (sec. / degr.)

Example: 90 degr. x 2 sec. / degr. = 180 sec.

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Nz (neutral zone)

Circuit

1

Setting range

1 ... 9 K

11187

Factory setting

3 K

Set the acceptable flow temperature deviation.

Set the neutral zone to a high value if you can accept a high variation in flow temperature. When the actual flow temperature is within the neutral zone, the controller does not activate the motorized control valve.

The neutral zone is symmetrical around the desired flow temperature value, i.e. half the value is above and half the value is below this temperature.

If you want to tune the PI regulation precisely, you can use the following method:

• Set the ‘Tn’ (integration time constant) to its max. value (999 sec.).

• Decrease the value for the ‘Xp’ (proportional band) until the system starts hunting (i.e. gets unstable) with a constant amplitude (it might be necessary to force the system by setting an extreme low value).

• Find the critical time period on the temperature recorder or use a stop watch.

Temp.

Critical time period

Time

This critical time period will be characteristic for the system, and you can evaluate the settings from this critical period.

‘Tn’ = 0.85 x critical time period

‘Xp’ = 2.2 x proportional band value in the critical time period

If the regulation seems to be too slow, you can decrease the proportional band value by 10%. Make sure there is a consumption when you set the parameters.

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5.6 Pump control

This application can operate with one or two circulation pumps.

When operating with two circulation pumps, the pumps are controlled alternately, according to a time set-up. When a pump is switched ON the controller is waiting for differential pressure (S7 for heating circuit, S8 for DHW circuit) to build up. If differential pressure is not achieved, an alarm is generated and the ECL

Comfort controller switches ON the other pump.

If none of the pumps can come into operation (detected by means of the differential pressure switch), the alarm is activated and the motorized control valve closes (a safety function).

Chan.-over time (change-over time)

Circuit Setting range

1 OFF / 1 ... 99 s

11314

Factory setting

5 s

Setting of time to elapse between the pump stop command for one pump and the start command for the other pump.

The change-over time can ensure that a pump is stopped efficiently before the other pump starts.

OFF: One circulation pump in the application.

1 ... 99: Time for change-over.

ON

OFF

P

P

3

5

‘Chan.-over time’

P5

P3

Seconds (s)

‘Chan.-over time’ has to be chosen in systems with two pumps.

Retry time

Circuit

1

Setting range

OFF / 1... 99 m

11310

Factory setting

20 m

If an alarm has been generated for the pump or alarms have been generated for both pumps, this setting will determine the time between the time of the alarm and the retry time for repeated pump start.

OFF: No retry time required after an alarm. The pump or pumps in question will not be restarted.

1 ... 99: After an alarm, the pump or pumps will be restarted after the set time.

Stab. time (stabilization time)

Circuit Setting range

11313

Factory setting

1 1... 99 s 15 s

Setting of max. time to elapse between pump start command and feedback from differential pressure switch.

If the differential pressure switch does not give feedback within the set time, the alarm will be activated and the other pump will get a start command.

If the chosen stabilization time (‘Stab. time’) is too short, the active pump will stop immediately after the stabilization time has elapsed.

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Change, duration

Circuit Setting range

11311

Factory setting

1 1 ... 10 2

The number of days between shift of circulation pumps. The shift takes place at the time set in 'Change time'.

ON

OFF

ON

OFF

P 3

P 5

P3

P5

P3

P 3

P5

P5

Days

Change time (changeover time)

Circuit Setting range

11312

Factory setting

1 0 ... 23 12

The exact time of the day, where the shift must take place. The day is divided into 24 hours. The factory setting here is 12 which means 12:00 (noon).

ON

OFF

ON

OFF

P 3

P 5

P 3

P5

Time

1 day

P exercise (pump exercise)

Circuit

1

Setting range

OFF / 1 ... 200 s

11022

Factory setting

OFF

The time the pump is activated during exercise. Exercise takes place every day (at 12:20) when no heat demand has been present.

OFF: No pump exercise.

1 ... 200: Activation time during exercise.

The feedback from the differential pressure switch is active and will activate the alarm in case that the pump does not start.

The status of the differential pressure switch is shown in 'Input overview'.

Example:

S7 status . . . OFF / ON

OFF: The differential pressure switch is closed (differential pressure is OK)

ON: The differential pressure switch is open (differential pressure is not OK)

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5.7 Refill water

Leaks on the consumers side will result in falling static pressure and thereby a poor supply of heating. A refill water function can inject water to increase the static pressure.

This application can monitor the static pressure and enable the refill water function when the pressure is too low.

The pressure is measured by means of a pressure transmitter

(giving a 0 - 10 volt signal in relation to the measured pressure) or a pressure switch.

When a pressure transmitter signal is used, two settings in the controller represent pressure setpoint and difference.

When a pressure switch signal is used, the setpoint and (maybe) the switching difference is set on the pressure switch.

When a too low pressure is detected the refill water pump is switched ON and, after a set time, the ON-OFF valve is activated.

If the pressure is not achieved within a set time, an alarm is generated. The ECL Comfort controller switches OFF the circulation pumps after 60 seconds and the control valve closes (a safety function).

Pressure

Circuit

1

Example: Relationship between input voltage and displayed pressure (in bar)

Bar

Setting range

Read-out only

Factory setting

30.0

The read-out can be a value (in bar):

• The pressure is measured by means of a pressure transmitter.

The transmitter sends the measured pressure as a 0-10 V or a

4-20 mA signal. The voltage signal can be applied directly to input S10. A current signal is converted by means of a resistor to a voltage and then applied to input S10. The measured voltage on input S10 must be converted to a pressure value by the controller. This procedure sets up the scaling.

Push the dial to see the graph and enter the value sets for the input voltage (1 and 10 volt) and displayed pressure (in bar).

Pressure: 0.0 ... 30.0 bar

Fixed voltage settings: 1 V and 10 V

Factory settings: (1.0,0) and (10,20.0)

This means that the ‘Pressure' is 0.0 bar at 1 V and 20.0 bar at

10 V.

Typically, the higher the voltage, the higher the displayed pressure.

Or the read-out can be OFF or ON:

• The pressure is measured by means of a pressure switch. The pressure switch has an open contact when measuring a too low pressure (shown as OFF). When measured pressure is OK, the contact is closed (shown as ON).

The pressure switch contact (potential free) is connected directly to input S10.

0.0

Volt

1 1 0

This example shows that 1 volt correspond to 0.0 bar and 10 volt correspond to 20.0 bar

This scaling menu is always shown, regardless whether a pressure transmitter or a pressure switch is used.

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Input type

Circuit

1

Choice of pressure input signal.

Setting range

OFF / AI / DI

11327

Factory setting

OFF

OFF: Pressure signal is not required. The refill water function is disabled.

AI: The input signal is an analog signal (0 - 10 V).

DI: The input signal is a digital signal (switch OFF or ON).

When selecting ‘OFF’, the refill water system could be self-acting.

Time-out

Circuit

1

Setting range

0 ... 1000 s

11323

Factory setting

20 s

Setting of the max. time for refill. The pressure, measured by S10, must be

OK within the set time. If not, the refill water function stops and an alarm is activated.

Pressure

Refill

OK

Not OK

ON

OFF

Seconds

(s)

Time-out

Pressure

Refill

OK

Not OK

ON

OFF

Alarm ON

OFF Seconds

(s)

Time-out

Pressure, des. (desired pressure)

Circuit

1

Setting range

0.0 ... 25.0 bar

11321

Factory setting

3.0 bar

Setting of the desired static pressure on the radiator (consumer) side. See also 'Pressure diff.'

Desired pressure

Pressure (bar)

Pressure difference

Pressure

Refill ON

OFF

Time

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Pressure, diff. (switching difference)

Circuit

1

Setting range

0.1 ... 5.0 bar

11322

Factory setting

1.5 bar

Setting of the switching difference for measured static pressure (pressure transmitter). The difference is symmetrical around the 'Pressure des.' See also 'Pressure des.'

The settings in 'Pressure, des.' and 'Pressure, diff.' have no influence when a pressure switch is used.

P exercise (pump exercise)

Circuit

1

Setting range

OFF / 1 ... 200 s

11320

Factory setting

OFF

The time the pump is activated during exercise. Exercise takes place every day (at 12:00).

OFF: No pump exercise.

1 ... 200: Activation time during exercise.

Valve delay

Circuit

1

Setting range

0 ... 30 s

11325

Factory setting

1 s

Setting of the time for activation of the ON/OFF valve after start of the refill water pump.

Refill pump ON

OFF

Refill valve ON

OFF

Time

‘Valve delay’

No. of pumps

Circuit

1

Setting range

OFF / 1 ... 2

Setting of the number of pumps in the refill water circuit.

11326

Factory setting

1

OFF: The refill water pump function is controlled by the master controller.

1 ... 2: The refill water function has one or two pumps.

Refill water pump

Refill water valve

ECL 485 communication bus

When selecting OFF and a demand for refill occurs, the controller for the actual circuit sends the requirement via the ECL 485 communication bus to the master controller.

The master must be running an application with refill water function.

The master starts the refill water pump and sends, via the ECL 485 communication bus, a message that the refill water pump is started.

The refill water valve then opens.

The slave must have an address 1 ... 9.

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The static pressure is shown in 'Input overview' as a value in bar or

OFF / ON.

Example:

OFF: The pressure switch is open (pressure is not OK)

ON: The pressure switch is closed (pressure is OK)

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5.8 Application

Demand offset

Circuit

1

Setting range

OFF / 1 ... 20 K

11017

Factory setting

OFF

The desired flow temperature in heating circuit 1 can be influenced by the demand for a desired flow temperature from another controller (slave) or another circuit.

OFF: The desired flow temperature in circuit 1 is not influenced by the demand of any other controller (slave or circuit 2).

1 ... 20: The desired flow temperature is increased by the set value in ‘Demand offset’, if the demand of the slave / circuit 2 is higher.

Temp.

Setting in

‘Demand offset’

Des. flow temp., circuit 1

Des. flow temp., circuit 2

Time

The function of ‘Demand offset’ can compensate for heat losses between master and slave controlled systems.

M exercise (valve exercise)

Circuit

1

Setting range

OFF / ON

Exercises the valve to avoid blocking in periods without heat demand.

11023

Factory setting

OFF

OFF: The valve exercise is not active.

ON: The valve opens for 7 minutes and closes for 7 minutes every third day at noon (12:00 hours).

DHW priority (closed valve / normal operation)

Circuit

1

Setting range

OFF / ON

11052

Factory setting

OFF

The heating circuit can be closed when the controller acts as slave and when

DHW charging is active in the master.

OFF: The flow temperature control remains unchanged during active DHW charging in the master controller.

ON: The valve in the heating circuit is closed* during active

DHW charging in the master controller.

* The desired flow temperature is set to the value set in

‘Frost pr. T’

This setting must be considered if this controller is a slave.

P frost T

Circuit

1

Setting range

OFF / -10 ... 20 °C

11077

Factory setting

2 °C

When the outdoor temperature is below the set temperature in ‘P frost T’, the controller automatically switches ON the circulation pump to protect the system.

OFF: No frost protection.

-10 ... 20: The circulation pump is ON when the outdoor temperature is below the set value.

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Under normal conditions, your system is not frost protected if your setting is below 0 °C or OFF.

For water-based systems, a setting of 2 °C is recommended.

Danfoss District Energy

Installation Guide ECL Comfort 310, application A361

P heat T (heat demand)

Circuit

1

Setting range

5 ... 40 °C

11078

Factory setting

20 °C

When the desired flow temperature is above the set temperature in ‘P heat T’, the controller automatically switches ON the circulation pump.

5 ... 40: The circulation pump is switched ON when the desired flow temperature is above the set value.

The valve is fully closed as long as the pump is not switched on.

Frost pr. T (frost protection temperature)

Circuit Setting range

11093

Factory setting

1 5 ... 40 °C 10 °C

Set the desired flow temperature for example at heating cut-out, total stop etc. to protect the system against frost.

5 ... 40: Desired frost protection temperature.

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Ext. input (external override) — A361.1 / A361.2

Circuit

1

Setting range

OFF / S1 ... S10

11141

Factory setting

OFF

Choose the input for 'Ext. input' (external override). By means of a switch the controller can be overridden to ‘Comfort’ or ‘Saving’ mode.

OFF: No inputs have been selected for external override.

S1 ... S10: Input selected for external override.

If S1... S6 is chosen as override input, the override switch must have gold-plated contacts.

If S7 ... S10 is chosen as override input, the override switch can be a standard contact.

See the drawing for a connection example of an override switch to input S9.

Choose only an unused input for override. If an already used input is applied for override, the functionality of this input is also neglected.

The two drawings (override to comfort mode and override to saving mode) show the functionality.

See also ‘Ext. mode’.

Override to ‘Comfort’ mode

Time

Override to ‘Saving’ mode

Time

The result of override to 'Saving' mode depends on the setting in

'Total stop'.

Total stop = OFF: Heating reduced

Total stop = ON: Heating stopped

Ext. mode (external override mode)

Circuit Setting range

1 COMFORT / SAVING

Choose external override mode.

11142

Factory setting

SAVING

The mode override can be activated for saving or comfort mode.

For override, the controller mode must be scheduled mode.

SAVING: The controller is in saving mode when the override switch is closed.

COMFORT: The controller is in comfort mode when the override switch is closed.

See also ‘Ext. input’.

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Min. act. time (min. activation time gear motor)

Circuit Setting range

1 2 ... 50

11189

Factory setting

The min. pulse period of 20 ms (milliseconds ) for activation of the gear motor.

10

Setting example

2

10

50

Value x 20 ms

40 ms

200 ms

1000 ms

The setting should be kept as high as acceptable to increase the lifetime of the actuator (gear motor).

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5.9 Alarm

Many applications in the ECL Comfort 210 and 310 series have an alarm function. The alarm function typically activates relay 4 (ECL

Comfort 210) or relay 6 (ECL Comfort 310).

The alarm relay can activate a lamp, a horn, an input to an alarm transmitting device etc. etc.

The relay in question is activated as long as the alarm condition is present.

Typical alarms:

• Actual flow temperature differs from the desired flow temperature.

• An activated circulation pump does not generate a pressure difference.

• The refill water function does not generate a pressure within a preset time.

• A universal alarm input (application dependent) is activated.

5.9.1 Temp. monitor.

Upper difference

Circuit

1

Setting range

OFF / 1 ... 30 K

11147

Factory setting

OFF

The alarm is activated if the actual flow temperature increases more than the set difference (acceptable temperature difference above the desired flow temperature). See also 'Delay'.

OFF: The alarm function is not active.

1 ... 30 K: The alarm function is active if the actual temperature gets above the acceptable difference.

Flow temp. °C

Lower difference

Circuit

1

Setting range

OFF / 1 ... 30 K

11148

Factory setting

OFF

The alarm is activated if the actual flow temperature decreases more than the set difference (acceptable temperature difference below the desired flow temperature). See also 'Delay'.

OFF: The alarm function is not active.

1 ... 30 K: The alarm function is active if the actual temperature gets below the acceptable difference.

Flow temp. °C

Upper difference (set value)

Desired flow temp.

° C Outdoor temp.

Lower difference (set value)

Desired flow temp.

° C

Outdoor temp.

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Delay

Circuit

1

Setting range

1 ... 99 m

11149

Factory setting

10 m

If an alarm condition from either 'Upper difference' or 'Lower difference' is present for a longer time than the set delay (in min.), the alarm function is activated.

1 ... 99 m: The alarm function will be activated if the alarm condition remains after the set delay.

Temp.

Flow temp.

Alarm limit

Time

Delay

Lowest temp.

Circuit

1

Setting range

10 ... 50 °C

11150

Factory setting

30 °C

The alarm function will not be activated if the desired flow temperature is lower than the set value.

If the cause of the alarm disappears, the alarm indication and output also disappear.

5.9.2 Clear alarm

If an alarm has been generated, a bell is shown in one of the favorite display (see ‘Monitoring temperatures and system components’) or in an overview display (see ‘Understanding the controller display’). The following menus are used to locate the alarm cause and reset (clear) the alarm signal. Even when the cause of the alarm has disappeared, the indication will still be active until the clear alarm procedure has been carried out.

Circ. pumps

Circuit

1

Setting range

OFF / ON

Choose whether the alarm should be cleared or not.

11315

Factory setting

OFF:

ON:

The alarm has not been activated.

The alarm has been activated.

Clear alarm procedure:

If the status is ‘ON’: Change ‘ON’ to ‘OFF’.

If the status is ‘OFF’: It is not possible to change it to ‘ON’.

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Refill water

Circuit

1

Setting range

OFF / ON

Choose whether the alarm should be cleared or not.

11324

Factory setting

OFF:

ON:

The alarm has not been activated.

The alarm has been activated.

Clear alarm procedure:

If the status is ‘ON’: Change ‘ON’ to ‘OFF’.

If the status is ‘OFF’: It is not possible to change it to ‘ON’.

5.9.3 Alarm overview

The alarm overview lists the components or functions that could cause an alarm.

The number to the left (i.e. 1, 5, 6, 7) relates to the alarm number which is sent by Modbus communication to a SCADA system.

Two alarm types can be present, ie. the alarms that are logged and the alarms that are not logged.

Example:

The alarm type for ‘Refill water’, ‘Pump 3’ and ‘Pump 5’ are logged alarms. This means that the alarm symbol will remain until the alarm has been cleared even if the cause of the alarm has disappeared.

The alarm type for ‘Temp. monitor’ e.g. is not a logged alarm which means that the alarm symbol will only be present as long as the alarm cause exists.

Example:

’Pump P5’ has caused an alarm.

The alarm overview will only list components or functions that could cause an alarm.

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Installation Guide ECL Comfort 310, application A361

6.0 Settings, circuit 2

6.1 Flow temperature

6.1.1 A361.1

The ECL Comfort controller determines and controls the flow temperature related to the outdoor temperature. This relationship is called the heat curve.

The heat curve is set by means of 6 coordinate points. The desired flow temperature is set at 6 pre-defined outdoor temperature values.

The shown value for the heat curve is an average value (slope), based on the actual settings.

Desired flow temperature

° C

110

100

80

60

40

20

C

B

A

-50 -40 -30 -20 -10 0 10 20

Outdoor temp.

-30 °C

-15 °C

-5 °C

0 °C

5 °C

15 °C

A

45 °C

40 °C

35 °C

32 °C

30 °C

25 °C

Desired flow temp.

B

75 °C

60 °C

50 °C

45 °C

40 °C

28 °C

C

95 °C

90 °C

80 °C

70 °C

60 °C

35 °C

Your settings

Adjust the desired flow temperature at -30, -15, -5, 0, 5, and 15 °C, if required.

A: Example for floor heating

B: Factory settings

C: Example for radiator heating (high demand)

Heat curve

Circuit

2

Setting range

Read-out only

Factory setting

Push the dial to enter / change the coordinates of the heat curve.

The heat curve represents the desired flow temperatures at different outdoor temperature and at a desired room temperature of 20 °C.

If the desired room temperature is changed, the desired flow temperature also changes:

(Desired room T - 20) × HC × 2.5

where "HC" is the Heat Curve slope and "2.5" is a constant.

The calculated flow temperature can be influenced by the ‘Boost’ and

‘Ramp’ functions etc.

Example:

Heat curve: 1.0

Desired flow temp.:

Desired room temp.:

50 °C

22 °C

Calculation (22–20) × 1.0 × 2.5 = 5

Result:

The desired flow temperature will be corrected from 50 °C to 55 °C.

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Max. limitation of the desired flow temperature:

In the application A361.1 the max. limitation value is selectable in ‘Temp. max.’.

Temp. max. (flow temp. limit, max.) — A361.1

Circuit Setting range

2 10 ... 150 °C

12178

Factory setting

90 °C

Set the max. flow temperature for the system. The desired flow temperature will not be higher than this setting. Adjust the factory setting, if required.

The setting for ‘Temp. max.’ has higher priority than ‘Temp. min.’.

Temp. min. (flow temp. limit, min.)

Circuit

2

Setting range

10 ... 150 °C

12177

Factory setting

10 °C

Set the min. flow temperature for the system. The desired flow temperature will not be lower than this setting. Adjust the factory setting, if required.

‘Temp. min.’ is overruled if 'Total stop' is active in Saving mode or

'Cut-out' is active.

‘Temp. min.’ can be overruled by the influence from the return temperature limitation (see 'Priority').

The setting for ‘Temp. max.’ has higher priority than ‘Temp. min.’.

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6.1.2 A361.2

The ECL Comfort controller determines and controls the flow temperature related to the supply temperature (S2). This relationship is set in the controller.

The heat curve is set in all coordinate points to the max. desired flow temperature (150 °C). The desired flow temperature will always be in relation to the supply temperature (S2).

The shown value for the heat curve is an average value (slope), based on the actual settings.

Outdoor temp.

-30 °C

-15 °C

-5 °C

0 °C

5 °C

15 °C

Factory setting

150 °C

150 °C

150 °C

150 °C

150 °C

150 °C

Your settings

Adjust the desired flow temperature at -30, -15, -5, 0, 5, and 15 °C, if required.

Heat curve

Circuit

2

Setting range

Read-out only

Factory setting

Desired flow temperature

°C

Y 2

Y1

X1

The factory setting (a general desired flow temperature of 150 °C) is limited to a max. value based on the supply temperature (S2) and the settings in parameters ‘High supp. T X2’, ‘High T max Y2’, ‘Low supply T X1’ and ‘Low T max Y1’.

Desired flow temperature

°C

9 5

50

58

70

85

X2

150

°C Supply temp. (S2)

°C Supply temp. (S2)

Danfoss District Energy

The above heat curve is an example of a supply temperature (S2) of

85 °C. The desired flow temperature (58 °C) is based on the set-up of the relationship between the supply temperature (S2) and the desired flow temperature.

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Max. limitation of the desired flow temperature:

In the application A361.2 the desired flow temperature or max.

limitation value depends on the supply temperature (S2). The relationship is set in the four settings ‘High supp. T X2’, ‘High T max

Y2’, ‘Low supply T X1’ and ‘Low T max Y1’.

When setting the heat curve coordinates as described in the section 'A361.1’, the desired flow temperature can be limited to a maximum according to the supply temperature (S2).

Temp. max. (flow temp. limit, max.) — A361.2

Circuit Setting range

2 Read-out only

Factory setting

The supply temperature (S2) determines the desired flow temperature. The value is calculated on basis of the settings in the following parameters: 'High supp. T X2', 'High T max Y2', 'Low supply T X1' and 'Low T max Y1'.

Temp. min. (flow temp. limit, min.)

Circuit

2

Setting range

10 ... 150 °C

12177

Factory setting

10 °C

Set the min. flow temperature for the system. The desired flow temperature will not be lower than this setting. Adjust the factory setting, if required.

‘Temp. min.’ is overruled if 'Total stop' is active in Saving mode or

'Cut-out' is active.

‘Temp. min.’ can be overruled by the influence from the return temperature limitation (see 'Priority').

The setting for ‘Temp. max.’ has higher priority than ‘Temp. min.’.

High supp. T X2 (high value of supply temp.) — A361.2

Circuit Setting range

12300

Factory setting

2 10 ... 150 °C 150 °C

Set the high value for the supply temperature in relation to the desired max. flow temperature. When the supply temperature is above the set value, the max. limitation of the flow temperature is the Y2 value. When the supply temperature is below the set value, the max. limitation of the flow temperature will be lower.

High T max Y2 (high value of max limitation) — A361.2

Circuit Setting range

12301

Factory setting

2 10 ... 150 °C 95 °C

Set the high value for the max. limitation of the desired flow temperature.

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Low supply T X1(low value of supply temp.) — A361.2

Circuit Setting range

12302

Factory setting

2 10 ... 150 °C 70 °C

Set the low value for the supply temperature in relation to the desired max. flow temperature. When the supply temperature is below the set value, the max. limitation of the flow temperature is the Y1 value. When the supply temperature is above the set value, the max. limitation of the flow temperature will be higher.

Low T max Y1 (low value of max limitation) — A361.2

Circuit Setting range

12303

Factory setting

2 10 ... 150 °C 50 °C

Set the low value for the max. limitation of the desired flow temperature.

Set-up procedure when the supply temperature (S2) has to limit the desired flow temperature to a maximum:

1. Choose ‘Heat curve’.

2. Set the desired flow temperature in all 6 coordinates (-30 °C, -15

°C etc.) to the desired values.

Result:

The desired flow temperature will be in relation to the outdoor temperature but will be limited to a maximum according the settings in ‘High supp. T X2’, ‘High T max Y2’, ‘Low supply T X1’ and

‘Low T max Y1’.

The example shows the max. limitation of the desired flow temperature when the supply temperature (S2) is 105 °C.

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6.2 Return limit

The return temperature limitation is based on the outdoor temperature. Typically in district heating systems a higher return temperature is accepted at a decrease in outdoor temperature. The relationship between the return temperature limits and outdoor temperature is set in two coordinates.

The outdoor temperature coordinates are set in 'High T out X1' and 'Low T out X2'. The return temperature coordinates are set in

'High limit Y2' and 'Low limit Y1'.

The controller automatically changes the desired flow temperature to obtain an acceptable return temperature when the return temperature falls below or gets higher than the calculated limit.

This limitation is based on a PI regulation where P ('Infl.' factor) responds quickly to deviations and I ('Adapt. time') responds slower and over time removes the small offsets between the desired and actual values. This is done by changing the desired flow temperature.

Influence

Return temperature limitation

° C

High limit Y2

60

Low limit Y1

40

-15 15

Low T out X2 High T out X1

° C

Outdoor temp.

‘Infl. - min.’ > 0

‘Limit’

‘Infl. - max.’ > 0

Return temperature

‘Infl. - max.’ < 0

‘Infl. - min.’ < 0

High T out X1 (return temp. limitation, high limit, X-axis)

Circuit

2

Setting range

-60 ... 20 °C

12031

Factory setting

15 °C

Set the outdoor temperature for the low return temperature limitation.

The corresponding Y coordinate is set in 'Low limit Y1'.

Low limit Y1 (return temp. limitation, low limit, Y-axis)

Circuit Setting range

12032

Factory setting

2 10 ... 150 °C 40 °C

Set the return temperature limitation referring to the outdoor temperature set in 'High T out X1'.

The corresponding X coordinate is set in 'High T out X1'.

Low T out X2 (return temp. limitation, low limit, X-axis)

Circuit Setting range

12033

Factory setting

2 -60 ... 20 °C -15 °C

Set the outdoor temperature for the high return temperature limitation.

The corresponding Y coordinate is set in 'High limit Y2'.

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If the ‘Infl.’ factor is too high and / or the ‘Adapt. time’ too low, there is a risk of unstable control.

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Installation Guide ECL Comfort 310, application A361

High limit Y2 (return temp. limitation, high limit, Y-axis)

Circuit

2

Setting range

10 ... 150 °C

12034

Factory setting

60 °C

Set the return temperature limitation referring to the outdoor temperature set in 'Low T out X2'.

The corresponding X coordinate is set in 'Low T out X2'.

Infl. - max. (return temp. limitation - max. influence)

Circuit

2

Setting range

-9.9 ... 9.9

12035

Factory setting

0.0

Determines how much the desired flow temperature will be influenced if the return temperature is higher than the desired limit (see 'Limit').

Influence higher than 0:

The desired flow temperature is increased, when the return temperature gets higher than the set limit.

Influence lower than 0:

The desired flow temperature is decreased, when the return temperature gets higher than the set limit.

Example

The return limit is active above 50 °C.

The influence is set to -2.0.

The actual return temperature is 2 degrees too high.

Result:

The desired flow temperature is changed by -2.0 x 2 = -4.0 degrees.

Normally, this setting is lower than 0 in district heating systems to avoid a too high return temperature.

Typically, this setting is 0 in boiler systems because a higher return temperature is acceptable (see also 'Infl. - min.').

Infl. - min. (return temp. limitation - min. influence)

Circuit

2

Setting range

-9.9 ... 9.9

12036

Factory setting

0.0

Determines how much the desired flow temperature will be influenced if the return temperature is lower than the desired limit (see 'Limit').

Influence higher than 0:

The desired flow temperature is increased, when the return temperature gets below the set limit.

Influence lower than 0:

The desired flow temperature is decreased, when the return temperature gets below the set limit.

Example

The return limit is active below 50 °C.

The influence is set to -3.0.

The actual return temperature is 2 degrees too low.

Result:

The desired flow temperature is changed by -3.0 x 2 = -6.0 degrees.

Normally, this setting is 0 in district heating systems because a lower return temperature is acceptable.

Typically, this setting is higher than 0 in boiler systems to avoid a too low return temperature (see also 'Infl. - max.').

Adapt. time (adaptation time)

Circuit Setting range

12037

Factory setting

2 OFF / 1 ... 50 s

Controls how fast the return temperature adapts to the desired return temperature limit (I control).

25 s

OFF: The control function is not influenced by the ‘Adapt.

time’.

1: The desired temperature is adapted quickly.

50: The desired temperature is adapted slowly.

The adaptation function can correct the desired flow temperature with max. 8 K.

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Priority (priority for return temp. limitation)

Circuit

2

Setting range

OFF / ON

12085

Factory setting

OFF

Choose whether the return temperature limitation should overrule the set min. flow temperature ‘Temp. min.’ .

OFF: The min. flow temperature limit is not overruled.

ON: The min. flow temperature limit is overruled.

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6.3 Flow / power limit

A flow or energy meter can be connected to the ECL controller in order to limit the flow or consumed power. The signal from the flow or energy meter is based on M-bus signal.

The flow / power limitation can be based on the outdoor temperature. Typically, in district heating systems a higher flow or power is accepted at lower outdoor temperatures.

The relationship between the flow or power limits and the outdoor temperature is set in two coordinates.

The outdoor temperature coordinates are set in 'High T out X1' and 'Low T out X2'.

The flow or power coordinates are set in 'Low limit Y1' and 'High limit Y2'. Based on these settings, the controller calculates the limitation value.

When the flow / power gets higher than the calculated limit, the controller gradually reduces the desired flow temperature to obtain an acceptable max. flow or power consumption.

High limit Y2

Low limit Y1

Flow / power limitation

Flow / power limitation

-15 15

Low T out X2 High T out X1

° C

Outdoor temp.

Limit

Desired flow temp.

° C

Time

If the ‘Adapt. time’ is too high, there is a risk of unstable control.

Actual (actual flow or power)

Circuit

2

Setting range

Read-out only

12110

Factory setting

The value is the actual flow or power based on the signal from flow / energy meter, converted in the controller.

Limit (limitation value)

Circuit

2

Set the limitation value.

Setting range

0.0 ... 999.9 l/h

12111

Factory setting

999.9 l/h

High T out X1 (flow / power limitation, high limit, X-axis)

Circuit Setting range

12119

Factory setting

2 -60 ... 20 °C 15 °C

Set the outdoor temperature for the low flow / power limitation.

The corresponding Y coordinate is set in 'Low limit Y1'.

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Low limit Y1 (flow / power limitation, low limit, Y-axis)

Circuit Setting range

12117

Factory setting

2 0.0 ... 999.9 l/h 999.9 l/h

Set the flow / power limitation referring to the outdoor temperature set in

'High T out X1'.

The corresponding X coordinate is set in 'High T out X1'.

The limitation function can overrule the set 'Temp. min' of the desired flow temperature.

Low T out X2 (flow / power limitation, low limit, X-axis)

Circuit Setting range

12118

Factory setting

2 -60 ... 20 °C -15 °C

Set the outdoor temperature for the high flow / power limitation.

The corresponding Y coordinate is set in 'High limit Y2'.

High limit Y2 (flow / power limitation, high limit, Y-axis)

Circuit Setting range

12116

Factory setting

2 0.0 ... 999.9 l/h 999.9 l/h

Set the flow / power limitation referring to the outdoor temperature set in 'Low T out X2'.

The corresponding X coordinate is set in 'Low T out X2'.

Adapt. time (adaptation time)

Circuit

2

Setting range

OFF / 1 ... 50 s

12112

Factory setting

Controls how fast the flow / power limitation adapts to the desired limitation.

OFF

OFF: The control function is not influenced by the ‘Adapt.

time’.

1: The desired temperature is adapted slowly.

50: The desired temperature is adapted quickly.

1:

2:

50:

Filter constant

Circuit

2

Setting range

1 ... 50

12113

Factory setting

The actual filter dampens the flow / power input data by the set factor.

10

No filtering.

Fast (low filter constant)

Slow (high filter constant)

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Input type

Circuit

2

Setting range

OFF / EM1 ... EM5

Choice of M-bus signal from energy meter number 1 ... 5.

12109

Factory setting

OFF

OFF: No M-bus signal acquired.

EM1 ... EM5: Energy meter number.

Units

Circuit

2

Choice of units for measured values.

Setting range

See the list

Flow values are expressed as l/h or m³/h

Power values are expressed as kW, MW or GW.

12115

Factory setting l/h

List for setting range of 'Units': l/h m³/h kW

MW

GW

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6.4 Optimization

Auto saving (saving temp. dependent on outdoor temp.)

Circuit

2

Setting range

OFF / -29 ... 10 °C

12011

Factory setting

-15 °C

Below the set value for the outdoor temperature, the saving temperature setting has no influence. Above the set value for the outdoor temperature, the saving temperature relates to the actual outdoor temperature. The function is relevant in district heating installations in order to avoid a big change in the desired flow temperature after a saving period.

OFF: The saving temperature does not depend on the outdoor temperature.

-29 ... 10: The saving temperature depends on the outdoor temperature. When the outdoor temperature is above

10 °C, the reduction is 100%. The lower the outdoor temperature, the less the temperature reduction. When the outdoor temperature is below the set limit, there is no temperature reduction.

The comfort and the saving temperatures are set in the display overviews. The difference between the comfort and the saving temperature is considered to be 100%. Depending on the outdoor temperature, the percentage value can be lower according to the set value in ‘Auto saving’.

Reduction

100%

0%

-29 -20 -10 0 10 20

Auto saving

Outdoor temp. °C

Example:

Outdoor temp.: –5 °C

Desired room temp. in Comfort mode: 22 °C

Desired room temp. in Saving mode: 16 °C

Setting in ‘Auto saving’: –15 °C

The drawing above illustrates that the reduction percentage at an outdoor temperature of –5 °C is 40%.

The difference between Comfort and Saving temperature is (22–16)

= 6 degrees.

40% of 6 degrees = 2.4 degrees

The ‘Auto saving’ temperature is corrected to (22–2.4) = 19.6 °C.

Boost

Circuit

2

Setting range

OFF / 1 ... 99%

12012

Factory setting

OFF

Shortens the heating-up period by increasing the desired flow temperature by the percentage you set.

OFF: The boost function is not active.

1-99%: The desired flow temperature is increased temporarily with the set percentage.

In order to shorten the heating-up period after a saving temperature period, the desired flow temperature can be increased temporarily (max. 1 hour). At optimizing the boost is active in the optimization period ('Optimizer').

If a room temperature sensor or an ECA 30 / 31 is connected, the boost stops when the room temperature is reached.

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Temp. °C

Ramp (reference ramping)

Circuit

2

Setting range

OFF / 1 ... 99 m

12013

Factory setting

The time (minutes) in which the desired flow temperature increases gradually to avoid load peaks in the heat supply.

OFF

OFF: The ramping function is not active.

1-99 m: The desired flow temperature is increased gradually with the set minutes.

In order to avoid load peaks in the supply network, the flow temperature can be set to increase gradually after a period with saving temperature. This causes the valve to open gradually.

Ramping time

Time (min.)

Optimizer (optimizing time constant)

Circuit

2

Setting range

OFF / 10 ... 59

12014

Factory setting

OFF

Optimizes the start and stop times for the comfort temperature period to obtain the best comfort at the lowest energy consumption.

The lower the outdoor temperature, the earlier the heating cut-in. The lower the outdoor temperature, the later the heating cut-out.

The optimized heating cut-out time can be automatic or disabled. The calculated start and stop times are based on the setting of the optimizing time constant.

Adjust the optimizing time constant.

The value consists of a two digit number. The two digits have the following meaning (digit 1 = Table I, digit 2 = Table II).

OFF: No optimization. The heating starts and stops at the times set in the schedule.

10 ... 59: See tables I and II.

Table I:

Left digit

1-

2-

3-

4-

5-

Table II:

Right digit

-0

-1

·

-5

·

-9

Heat accumulation of the building light medium heavy medium heavy

System type

Radiator systems

Floor heating systems

Dimensioning temperature

-50 °C

-45 °C

·

-25 °C

·

-5 °C

Capacity large

·

· normal

· small

Dimensioning temperature:

The lowest outdoor temperature (usually determined by your system designer in connection with the design of the heating system) at which the heating system can maintain the designed room temperature.

Example

The system type is radiator, and the heat accumulation of the building is medium.

The left digit is 2.

The dimensioning temperature is -25 °C, and the capacity is normal.

The right digit is 5.

Result:

The setting is to be changed to 25.

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Pre-stop (optimized stop time)

Circuit

2

Disable the optimized stop time.

OFF:

ON:

Setting range

OFF / ON

The optimized stop time is disabled.

The optimized stop time is enabled.

12026

Factory setting

ON

Example: Optimization of Comfort from 07:00 - 22:00

07:00 22:00

Schedule

Pre-stop OFF

Pre-stop ON

Optimization stop Optimization start

Total stop

Circuit

2

Setting range

OFF / ON

12021

Factory setting

OFF

Decide whether you want a total stop during the saving temperature period.

OFF: No total stop. The desired flow temperature is reduced according to:

• desired room temperature in saving mode

• auto saving

ON: The desired flow temperature is lowered to the set value in ‘Frost pr.’ The circulation pump is stopped but frost protection is still active, see 'P frost T'.

Desired flow temp. °C

Desired flow temp. °C

Total stop = ON

‘Frost pr.’

Time

Total stop = OFF

‘Frost pr.’

Time

The min. flow temperature limitation ('Temp. min.') is overruled when

'Total stop' is ON.

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Cut-out (limit for heating cut-out)

Circuit

2

Setting range

OFF / 1 ... 50 °C

12179

Factory setting

20 °C

The heating can be switched OFF when the outdoor temperature is higher than the set value. The valve closes and after the post-run time, the heating circulation pump stops. ‘Temp. min.’ will be overruled.

The heating system switches ON again when the outdoor temperature and the accumulated (filtered) outdoor temperature become lower than the set limit.

This function can save energy.

Set the value for outdoor temperature at which you want the heating system to switch OFF.

Temp.

1 8 °C

Actual outdoor temp.

Accumulated outdoor temp.

Heating ON Heating OFF Heating ON

Time

The heating cut-out is only active when the controller mode is in scheduled operation. When the cut-out value is set to OFF, there is no heating cut-out.

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6.5 Control parameters

Motor pr. (motor protection)

Circuit Setting range

12174

Factory setting

2 OFF / 10 ... 59 m OFF

Prevents the controller from unstable temperature control (and resulting actuator oscillations). This can occur at very low load. The motor protection increases the lifetime of all involved components.

OFF: Motor protection is not activated.

10 ... 59: Motor protection is activated after the set activation delay (minutes).

Recommended for DHW systems with variable load.

Xp (proportional band)

Circuit

2

Setting range

5 ... 250 K

12184

Factory setting

40 K

Set the proportional band. A higher value will result in a stable but slow control of the flow temperature.

Tn (integration time constant)

Circuit

2

Setting range

1 ... 999 s

12185

Factory setting

20 s

Set a high integration time constant to obtain a slow but stable reaction to deviations.

A low integration time constant (in seconds) will make the controller react fast but with less stability.

M run (running time of the motorized control valve)

Circuit Setting range

2 5 ... 250 s

12186

Factory setting

20 s

‘M run’ is the time in seconds it takes the controlled component to move from fully closed to fully open position. Set the ‘M run’ according to the examples or measure the running time by means of a stop watch.

How to calculate the running time of a motorized control valve

The running time of the motorized control valve is calculated using the following methods:

Seated valves

Running time = Valve stroke (mm) x actuator speed (sec. / mm)

Example: 5.0 mm x 15 sec. / mm = 75 sec.

Rotating valves

Running time = Turning degrees x actuator speed (sec. / degr.)

Example: 90 degr. x 2 sec. / degr. = 180 sec.

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Nz (neutral zone)

Circuit

2

Setting range

1 ... 9 K

12187

Factory setting

3 K

Set the acceptable flow temperature deviation.

Set the neutral zone to a high value if you can accept a high variation in flow temperature. When the actual flow temperature is within the neutral zone, the controller does not activate the motorized control valve.

The neutral zone is symmetrical around the desired flow temperature value, i.e. half the value is above and half the value is below this temperature.

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If you want to tune the PI regulation precisely, you can use the following method:

• Set the ‘Tn’ (integration time constant) to its max. value (999 sec.).

• Decrease the value for the ‘Xp’ (proportional band) until the system starts hunting (i.e. gets unstable) with a constant amplitude (it might be necessary to force the system by setting an extreme low value).

• Find the critical time period on the temperature recorder or use a stop watch.

Temp.

Critical time period

Time

This critical time period will be characteristic for the system, and you can evaluate the settings from this critical period.

‘Tn’ = 0.85 x critical time period

‘Xp’ = 2.2 x proportional band value in the critical time period

If the regulation seems to be too slow, you can decrease the proportional band value by 10%. Make sure there is a consumption when you set the parameters.

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6.6 Pump control

This application can operate with one or two circulation pumps.

When operating with two circulation pumps, the pumps are controlled alternately, according to a time set-up. When a pump is switched ON the controller is waiting for differential pressure (S7 for heating circuit, S8 for DHW circuit) to build up. If differential pressure is not achieved, an alarm is generated and the ECL

Comfort controller switches ON the other pump.

If none of the pumps can come into operation (detected by means of the differential pressure switch), the alarm is activated and the motorized control valve closes (a safety function).

Chan.-over time (change-over time)

Circuit Setting range

2 OFF / 1 ... 99 s

12314

Factory setting

5 s

Setting of time to elapse between the pump stop command for one pump and the start command for the other pump.

The change-over time can ensure that a pump is stopped efficiently before the other pump starts.

OFF: One circulation pump in the application.

1 ... 99: Time for change-over.

ON

OFF

P

P

1

2

‘Chan.-over time’

P2

P1

Seconds (s)

‘Chan.-over time’ has to be chosen in systems with two pumps.

Retry time

Circuit

2

Setting range

OFF / 1... 99 m

12310

Factory setting

20 m

If an alarm has been generated for the pump or alarms have been generated for both pumps, this setting will determine the time between the time of the alarm and the retry time for repeated pump start.

OFF: No retry time required after an alarm. The pump or pumps in question will not be restarted.

1 ... 99: After an alarm, the pump or pumps will be restarted after the set time.

Stab. time (stabilization time)

Circuit Setting range

12313

Factory setting

2 1... 99 s 15 s

Setting of max. time to elapse between pump start command and feedback from differential pressure switch.

If the differential pressure switch does not give feedback within the set time, the alarm will be activated and the other pump will get a start command.

If the chosen stabilization time (‘Stab. time’) is too short, the active pump will stop immediately after the stabilization time has elapsed.

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Change, duration

Circuit Setting range

12311

Factory setting

2 1 ... 10 2

The number of days between shift of circulation pumps. The shift takes place at the time set in 'Change time'.

ON

OFF

ON

OFF

P 1

P 2

P1

P2

P1

P 1

P2

P2

Days

Change time (changeover time)

Circuit Setting range

12312

Factory setting

2 0 ... 23 12

The exact time of the day, where the shift must take place. The day is divided into 24 hours. The factory setting here is 12 which means 12:00 (noon).

ON

OFF

ON

OFF

P 1

P 2

P 1

P2

Time

1 day

P exercise (pump exercise)

Circuit

2

Setting range

OFF / 1 ... 200 s

12022

Factory setting

OFF

The time the pump is activated during exercise. Exercise takes place every day (at 12:20) when no heat demand has been present.

OFF: No pump exercise.

1 ... 200: Activation time during exercise.

The feedback from the differential pressure switch is active and will activate the alarm in case that the pump does not start.

The status of the differential pressure switch is shown in 'Input overview'.

Example:

S7 status . . . OFF / ON

OFF: The differential pressure switch is closed (differential pressure is OK)

ON: The differential pressure switch is open (differential pressure is not OK)

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6.7 Refill water

Leaks on the consumers side will result in falling static pressure and thereby a poor supply of heating. A refill water function can inject water to increase the static pressure.

This application can monitor the static pressure and enable the refill water function when the pressure is too low.

The pressure is measured by means of a pressure transmitter

(giving a 0 - 10 volt signal in relation to the measured pressure) or a pressure switch.

When a pressure transmitter signal is used, two settings in the controller represent pressure setpoint and difference.

When a pressure switch signal is used, the setpoint and (maybe) the switching difference is set on the pressure switch.

When a too low pressure is detected the refill water pump is switched ON and, after a set time, the ON-OFF valve is activated.

If the pressure is not achieved within a set time, an alarm is generated. The ECL Comfort controller switches OFF the circulation pumps after 60 seconds and the control valve closes (a safety function).

Pressure

Circuit

1

Example: Relationship between input voltage and displayed pressure (in bar)

Bar

Setting range

Read-out only

Factory setting

30.0

The read-out can be a value (in bar):

• The pressure is measured by means of a pressure transmitter.

The transmitter sends the measured pressure as a 0-10 V or a

4-20 mA signal. The voltage signal can be applied directly to input S10. A current signal is converted by means of a resistor to a voltage and then applied to input S10. The measured voltage on input S10 must be converted to a pressure value by the controller. This procedure sets up the scaling.

Push the dial to see the graph and enter the value sets for the input voltage (1 and 10 volt) and displayed pressure (in bar).

Pressure: 0.0 ... 30.0 bar

Fixed voltage settings: 1 V and 10 V

Factory settings: (1.0,0) and (10,20.0)

This means that the ‘Pressure' is 0.0 bar at 1 V and 20.0 bar at

10 V.

Typically, the higher the voltage, the higher the displayed pressure.

Or the read-out can be OFF or ON:

• The pressure is measured by means of a pressure switch. The pressure switch has an open contact when measuring a too low pressure (shown as OFF). When measured pressure is OK, the contact is closed (shown as ON).

The pressure switch contact (potential free) is connected directly to input S10.

0.0

Volt

1 1 0

This example shows that 1 volt correspond to 0.0 bar and 10 volt correspond to 20.0 bar

This scaling menu is always shown, regardless whether a pressure transmitter or a pressure switch is used.

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Input type

Circuit

2

Choice of pressure input signal.

Setting range

OFF / AI / DI

12327

Factory setting

OFF

OFF: Pressure signal is not required. The refill water function is disabled.

AI: The input signal is an analog signal (0 - 10 V).

DI: The input signal is a digital signal (switch OFF or ON).

When selecting ‘OFF’, the refill water system could be self-acting.

Time-out

Circuit

2

Setting range

0 ... 1000 s

12323

Factory setting

20 s

Setting of the max. time for refill. The pressure, measured by S10, must be

OK within the set time. If not, the refill water function stops and an alarm is activated.

Pressure

Refill

OK

Not OK

ON

OFF

Seconds

(s)

Time-out

Pressure

Refill

OK

Not OK

ON

OFF

Alarm ON

OFF Seconds

(s)

Time-out

Pressure, des. (desired pressure)

Circuit

2

Setting range

0.0 ... 25.0 bar

12321

Factory setting

3.0 bar

Setting of the desired static pressure on the radiator (consumer) side. See also 'Pressure diff.'

Desired pressure

Pressure (bar)

Pressure difference

Pressure

Refill ON

OFF

Time

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Pressure, diff. (switching difference)

Circuit

2

Setting range

0.1 ... 5.0 bar

12322

Factory setting

1.5 bar

Setting of the switching difference for measured static pressure (pressure transmitter). The difference is symmetrical around the 'Pressure des.' See also 'Pressure des.'

The settings in 'Pressure, des.' and 'Pressure, diff.' have no influence when a pressure switch is used.

P exercise (pump exercise)

Circuit

2

Setting range

OFF / 1 ... 200 s

12320

Factory setting

OFF

The time the pump is activated during exercise. Exercise takes place every day (at 12:00).

OFF: No pump exercise.

1 ... 200: Activation time during exercise.

Valve delay

Circuit

2

Setting range

0 ... 30 s

12325

Factory setting

1 s

Setting of the time for activation of the ON/OFF valve after start of the refill water pump.

Refill pump ON

OFF

Refill valve ON

OFF

Time

‘Valve delay’

No. of pumps

Circuit

2

Setting range

OFF / 1 ... 2

Setting of the number of pumps in the refill water circuit.

12326

Factory setting

1

OFF: The refill water pump function is controlled by the master controller.

1 ... 2: The refill water function has one or two pumps.

Refill water pump

Refill water valve

ECL 485 communication bus

When selecting OFF and a demand for refill occurs, the controller for the actual circuit sends the requirement via the ECL 485 communication bus to the master controller.

The master must be running an application with refill water function.

The master starts the refill water pump and sends, via the ECL 485 communication bus, a message that the refill water pump is started.

The refill water valve then opens.

The slave must have an address 1 ... 9.

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The static pressure is shown in 'Input overview' as a value in bar or

OFF / ON.

Example:

OFF: The pressure switch is open (pressure is not OK)

ON: The pressure switch is closed (pressure is OK)

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6.8 Application

M exercise (valve exercise)

Circuit

2

Setting range

OFF / ON

Exercises the valve to avoid blocking in periods without heat demand.

12023

Factory setting

OFF

OFF: The valve exercise is not active.

ON: The valve opens for 7 minutes and closes for 7 minutes every third day at noon (12:00 hours).

DHW priority (closed valve / normal operation)

Circuit

2

Setting range

OFF / ON

12052

Factory setting

OFF

The heating circuit can be closed when the controller acts as slave and when

DHW charging is active in the master.

OFF: The flow temperature control remains unchanged during active DHW charging in the master controller.

ON: The valve in the heating circuit is closed* during active

DHW charging in the master controller.

* The desired flow temperature is set to the value set in

‘Frost pr. T’

This setting must be considered if this controller is a slave.

P frost T

Circuit

2

Setting range

OFF / -10 ... 20 °C

12077

Factory setting

2 °C

When the outdoor temperature is below the set temperature in ‘P frost T’, the controller automatically switches ON the circulation pump to protect the system.

OFF: No frost protection.

-10 ... 20: The circulation pump is ON when the outdoor temperature is below the set value.

Under normal conditions, your system is not frost protected if your setting is below 0 °C or OFF.

For water-based systems, a setting of 2 °C is recommended.

P heat T (heat demand)

Circuit

2

Setting range

5 ... 40 °C

12078

Factory setting

20 °C

When the desired flow temperature is above the set temperature in ‘P heat T’, the controller automatically switches ON the circulation pump.

5 ... 40: The circulation pump is switched ON when the desired flow temperature is above the set value.

The valve is fully closed as long as the pump is not switched on.

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Frost pr. T (frost protection temperature)

Circuit

2

Setting range

5 ... 40 °C

12093

Factory setting

10 °C

Set the desired flow temperature to protect the DHW system against frost.

5 ... 40: Desired frost protection temperature.

Ext. input (external override) — A361.1 / A361.2

Circuit

2

Setting range

OFF / S1 ... S10

12141

Factory setting

OFF

Choose the input for 'Ext. input' (external override). By means of a switch the controller can be overridden to ‘Comfort’ or ‘Saving’ mode.

OFF: No inputs have been selected for external override.

S1 ... S10: Input selected for external override.

If S1... S6 is chosen as override input, the override switch must have gold-plated contacts.

If S7 ... S10 is chosen as override input, the override switch can be a standard contact.

See the drawing for a connection example of an override switch to input S9.

Choose only an unused input for override. If an already used input is applied for override, the functionality of this input is also neglected.

The two drawings (override to comfort mode and override to saving mode) show the functionality.

See also ‘Ext. mode’.

Override to ‘Comfort’ mode

Time

Override to ‘Saving’ mode

Time

The result of override to 'Saving' mode depends on the setting in

'Total stop'.

Total stop = OFF: Heating reduced

Total stop = ON: Heating stopped

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Ext. mode (external override mode)

Circuit

2

Choose external override mode.

Setting range

COMFORT / SAVING

12142

Factory setting

SAVING

The mode override can be activated for saving or comfort mode.

For override, the controller mode must be scheduled mode.

SAVING: The controller is in saving mode when the override switch is closed.

COMFORT: The controller is in comfort mode when the override switch is closed.

See also ‘Ext. input’.

Min. act. time (min. activation time gear motor)

Circuit Setting range

12189

Factory setting

3 2 2 ... 50

The min. pulse period of 20 ms (milliseconds ) for activation of the gear motor.

Setting example

2

10

50

Value x 20 ms

40 ms

200 ms

1000 ms

The setting should be kept as high as acceptable to increase the lifetime of the actuator (gear motor).

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6.9 Alarm

Many applications in the ECL Comfort 210 and 310 series have an alarm function. The alarm function typically activates relay 4 (ECL

Comfort 210) or relay 6 (ECL Comfort 310).

The alarm relay can activate a lamp, a horn, an input to an alarm transmitting device etc. etc.

The relay in question is activated as long as the alarm condition is present.

Typical alarms:

• Actual flow temperature differs from the desired flow temperature.

• An activated circulation pump does not generate a pressure difference.

• The refill water function does not generate a pressure within a preset time.

• A universal alarm input (application dependent) is activated.

6.9.1 Temp. monitor.

Upper difference

Circuit

2

Setting range

OFF / 1 ... 30 K

12147

Factory setting

OFF

The alarm is activated if the actual flow temperature increases more than the set difference (acceptable temperature difference above the desired flow temperature). See also 'Delay'.

OFF: The alarm function is not active.

1 ... 30 K: The alarm function is active if the actual temperature gets above the acceptable difference.

Flow temp. °C

Lower difference

Circuit Setting range

12148

Factory setting

2 OFF / 1 ... 30 K OFF

The alarm is activated if the actual flow temperature decreases more than the set difference (acceptable temperature difference below the desired flow temperature). See also 'Delay'.

OFF: The alarm function is not active.

1 ... 30 K: The alarm function is active if the actual temperature gets below the acceptable difference.

Flow temp. °C

Upper difference (set value)

Desired flow temp.

° C

Outdoor temp.

Lower difference (set value)

Desired flow temp.

° C

Outdoor temp.

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Delay

Circuit

2

Setting range

1 ... 99 m

12149

Factory setting

10 m

If an alarm condition from either 'Upper difference' or 'Lower difference' is present for a longer time than the set delay (in min.), the alarm function is activated.

1 ... 99 m: The alarm function will be activated if the alarm condition remains after the set delay.

Temp.

Flow temp.

Alarm limit

Time

Delay

Lowest temp.

Circuit

2

Setting range

10 ... 50 °C

12150

Factory setting

30 °C

The alarm function will not be activated if the desired flow temperature is lower than the set value.

If the cause of the alarm disappears, the alarm indication and output also disappear.

6.9.2 Clear alarm

If an alarm has been generated, a bell is shown in one of the favorite display (see ‘Monitoring temperatures and system components’) or in an overview display (see ‘Understanding the controller display’). The following menus are used to locate the alarm cause and reset (clear) the alarm signal. Even when the cause of the alarm has disappeared, the indication will still be active until the clear alarm procedure has been carried out.

Circ. pumps

Circuit

2

Setting range

OFF / ON

Choose whether the alarm should be cleared or not.

12315

Factory setting

OFF:

ON:

The alarm has not been activated.

The alarm has been activated.

Clear alarm procedure:

If the status is ‘ON’: Change ‘ON’ to ‘OFF’.

If the status is ‘OFF’: It is not possible to change it to ‘ON’.

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Refill water

Circuit

2

Setting range

OFF / ON

Choose whether the alarm should be cleared or not.

12324

Factory setting

OFF:

ON:

The alarm has not been activated.

The alarm has been activated.

Clear alarm procedure:

If the status is ‘ON’: Change ‘ON’ to ‘OFF’.

If the status is ‘OFF’: It is not possible to change it to ‘ON’.

6.9.3 Alarm overview

The alarm overview lists the components or functions that could cause an alarm.

The number to the left (i.e. 3, 4, 8) relates to the alarm number which is sent by Modbus communication to a SCADA system.

Two alarm types can be present, ie. the alarms that are logged and the alarms that are not logged.

Example:

The alarm type for ‘Pump 1’ and ‘Pump 2’ are logged alarms. This means that the alarm symbol will remain until the alarm has been cleared even if the cause of the alarm has disappeared.

The alarm type for ‘Temp. monitor’ e.g. is not a logged alarm which means that the alarm symbol will only be present as long as the alarm cause exists.

Example:

’Pump P2’ has caused an alarm.

The alarm overview will only list components or functions that could cause an alarm.

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7.0 Common controller settings

7.1 Introduction to ‘Common controller settings’

Some general settings which apply to the entire controller are located in a specific part of the controller.

To enter ‘Common controller settings’:

Action: Purpose:

Choose ‘MENU’ in any circuit

Confirm

Choose the circuit selector at the top right corner in the display

Confirm

Choose ‘Common controller settings’

Confirm

Examples:

Circuit selector

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7.2 Time & Date

It is only necessary to set the correct date and time in connection with the first use of the ECL Comfort controller or after a power break of more than 72 hours.

The controller has a 24 hour clock.

Aut. daylight (Daylight saving time changeover)

YES: The controller’s built-in clock automatically changes + /

- one hour on the standardized days for daylight saving time changeover for Central Europe.

NO: You change manually between summer and winter time by setting the clock backward or forward.

When controllers are connected as slaves in a master / slave system

(via ECL 485 communication bus), they will receive ‘Time & Date’ from the master.

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7.3 Holiday

There is a holiday program for each circuit and a holiday program for the common controller.

Each holiday program contains one or more schedules. Each schedule can be set to a start date and an end date. The set period starts on the start date at 00.00 and stops on end date at 24.00.

Selectable modes are Comfort, Saving, Frost protection or Comfort

7-23 (before 7 and after 23, the mode is scheduled).

How to set your holiday schedule:

Examples: Action: Purpose:

Choose ‘MENU’

Confirm

Choose the circuit selector at the top right corner in the display

Confirm

Choose a circuit or 'Common controller settings'

Heating

DHW

Common controller settings

Confirm

Go to ‘Holiday’

Confirm

Choose a schedule

Confirm

Confirm choice of mode selector

Choose mode

. Comfort

· Comfort 7–23

. Saving

· Frost protection

Confirm

Enter the start time first and then the end time

Confirm

Go to ‘Menu’

Confirm

Choose ‘Yes’ or ‘No’ in ‘Save’. Choose the next schedule, if required

7 -23

The holiday program in the ‘Common controller settings’ is valid for all circuits. The holiday program can also be set individually in the heating or DHW circuits.

The end date must be at least be one day later than the start date.

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The ECA 30 / 31 cannot override the holiday schedule of the controller temporarily.

However, it is possible to make use of the following options from the ECA 30 / 31 when the controller is in scheduled mode:

Day off

Holiday

Relaxing (extended comfort period)

Going out (extended saving period)

Energy-saving trick:

Use 'Going out' (the extended saving period) for airing purposes (e.g.

for ventilating the rooms by means of fresh air from open windows).

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7.4 Input overview

The input overview is located in the common controller settings.

This overview will always show you the actual temperatures in the system (read-only).

In addition to the measured temperatures, pressures, pressure switches and alarm switches are indicated as follows:

Input:

Static pressure:

Status:

1.9 bar

(example)

The input is set to OFF or a 0–10 V input (analog input = ‘AI’).

OFF:

Pressure not OK

ON:

Pressure OK

The input is set as a switch input (digital input = ‘DI’).

S7 (S8, S9) status: OFF

ON

The input is activated by means of a differential pressure switch or an alarm contact, i.e. connected to terminal 30.

The input is not activated.

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7.5 Log

The log function (temperature history) allows you to monitor the logs of today, yesterday, the past 2 days as well as the past 4 days for the connected sensors.

There is a log display for the relevant sensor, showing the measured temperature.

The log function is only available in the 'Common controller settings'.

Example 1:

1 day log for yesterday showing the development in outdoor temperature during the past 24 hours.

Example 2:

Today’s log for the actual heating flow temperature as well as the desired temperature.

Example 3:

Yesterday’s log for the DHW flow temperature as well as the desired temperature.

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7.6 Output override

The output override is used to disable one or more of the controlled components. This could among others be useful in a service situation.

Action: Purpose:

Choose 'MENU' in any of the overview displays

Confirm

Choose the circuit selector at the top right corner in the display

Confirm

Examples:

Choose common controller settings

Confirm

Choose 'Output override'

Confirm

Choose a controlled component

Confirm

Adjust the status of the controlled component:

Motorized control valve: AUTO, STOP,

CLOSE, OPEN

Pump: AUTO, OFF, ON

Confirm status change

M1, P1 etc.

Remember to change the status back again as soon as an override is not required any longer.

Controlled components Circuit selector

When the selected controlled component (output) is not ‘AUTO’, the

ECL Comfort controller does not control the component in question

(pump or motorized control valve e.g.). Frost protection is not active.

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7.7 Key functions

New application

Application

Factory setting

Copy

Erase application:

Removes the existing application. As soon as the ECL key is inserted, another application can be chosen.

Gives an overview over the application and its subtypes of the ECL key in question.

System settings:

System settings are, among others, communication set-up, display brightness etc.

User settings:

User settings are, among others, desired room temperature, desired DHW temperature, schedules, heat curve, limitation values etc.

Go to factory:

Restores the factory settings.

To:

Copy direction

System settings

User settings

Start copying

A more detailed description of how to use the individual ‘Key functions’ can also be seen in ‘Inserting the ECL application key’.

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7.8 System

7.8.1 ECL version

In ‘ECL version’ you will always be able to find an overview of the data related to your electronic controller.

Please have this information available if you need to contact your

Danfoss sales organization concerning the controller.

Information about your ECL Application Key can be found in ‘Key functions’ and ‘ Key overview’.

Code no.:

Hardware:

Software:

Serial no.:

Production week:

The Danfoss sales and order no.

for the controller

Hardware version of the controller

Software version of the controller

Unique number for the individual controller

Week no. and year (WW.YYYY)

Example, ECL version

7.8.2 Display

Backlight (display brightness)

Circuit

Adjust the brightness of the display.

0:

10:

Weak backlight.

Strong backlight.

Setting range

0 ... 10

60058

Factory setting

5

Contrast (display contrast)

Circuit

Adjust the contrast of the display.

0:

10:

Low contrast.

High contrast.

Setting range

0 ... 10

60059

Factory setting

3

7.8.3 Communication

Modbus addr.

Circuit Setting range

1 ... 247

Set the Modbus address if the controller is part of a Modbus network.

38

Factory setting

1

1 ... 247: Assign the Modbus address within the stated setting range.

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ECL 485 addr. (master / slave address)

Circuit Setting range

0 ... 15

2048

Factory setting

15

This settting is relevant if more controllers are working in the same ECL

Comfort system (connected via the ECL 485 communication bus) and / or

Remote Control Units (ECA 30 / 31) are connected.

0: The controller works as slave.

The slave receives information about the outdoor temperature (S1), system time, and signal for DHW demand in the master.

1 ... 9: The controller works as slave.

The slave receives information about the outdoor temperature (S1), system time, and signal for DHW demand in the master. The slave sends information about the desired flow temperature to the master.

10 ... 14: Reserved.

15: The ECL 485 communication bus is active.

The controller is master. The master sends information about the outdoor temperature (S1) and system time.

Connected Remote Control Units (ECA 30 / 31) are powered.

The ECL Comfort controllers can be connected via the ECL 485 communication bus to perform a larger system (the ECL 485 communication bus can connect to max. 16 devices).

Each slave must be configured with its own address (1 ... 9).

However, more slaves can have the address 0 if they only have to receive information about outdoor temperature and system time

(listeners).

The total cable length of max. 200 m (all devices incl. the internal ECL

485 communication bus) should not be exceeded.

Cable lengths of more than 200 m may cause noise sensibility (EMC).

Service Pin

Circuit Setting range

0 / 1

This setting is only used in connection with set-up of Modbus communication.

2150

Factory setting

0

Ext. reset

Circuit Setting range

0 / 1

This setting is only used in connection with set-up of Modbus communication.

2151

Factory setting

0

7.8.4 Language

Language

Circuit

Choose your language.

Setting range

English / ‘Local’

2050

Factory setting

English

Local language is selected during installation. If you want to change to another local language, the application must be reinstalled. However, it is always possible to change between the local language and English.

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Danfoss District Energy

Installation Guide ECL Comfort 310, application A361

8.0 Miscellaneous

8.1 Frequently asked questions

The definitions apply to the Comfort 210 as well as ECL Comfort

310 series. Consequently, you might come across expressions that are not mentioned in your guide.

The time shown in the display is one hour off?

See ‘Time and Date’.

The time shown in the display is not correct?

The internal clock may have been reset, if there has been a power break for more than 72 hours.

Go to the 'Common controller settings' and 'Time & Date' to set the correct time.

The ECL Application Key is lost?

Switch the power off and on again to see the system type and the software generation of the controller or go to 'Common controller settings' >'Key functions' > 'Application'. The system type (e.g.

TYPE A266.1) and the system diagram is displayed.

Order a replacement from your Danfoss representative (e.g. ECL

Application Key A266).

Insert the new ECL Application Key and copy your personal settings from the controller to the new ECL Application Key, if required.

The room temperature is too low?

Make sure that the radiator thermostat does not limit the room temperature.

If you still cannot obtain the desired room temperature by adjusting the radiator thermostats, the flow temperature is too low. Increase the desired room temperature (display with desired room temperature). If this does not help, adjust the ‘Heat curve’

(‘Flow temp.’).

The room temperature is too high during saving periods?

Make sure that the min. flow temperature limitation ('Temp. min.') is not too high.

The temperature is unstable?

Check that the flow temperature sensor is correctly connected and in the right place. Adjust the control parameters ('Control par.').

If the controller has a room temperature signal, see 'Room limit'.

The controller does not operate and the control valve is closed?

Check that the flow temperature sensor is measuring the correct value, see 'Daily use' or 'Input overview'.

Check the influence from other measured temperatures.

How to make an extra comfort period in the schedule?

You can set an additional comfort period by adding new ‘Start’ and ‘Stop’ times in ‘Schedule’.

How to remove a comfort period in the schedule?

You can remove a comfort period by setting start and stop times to the same value.

How to restore your personal settings?

Please read the chapter concerning ‘Inserting the ECL Application

Key’.

How to restore the factory settings?

Please read the chapter concerning ‘Inserting the ECL Application

Key’.

Why can’t the settings be changed?

The ECL Application Key has been removed.

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Installation Guide ECL Comfort 310, application A361

How to react on alarms?

An alarm indicates that the system is not operating satisfactorily.

Please contact your installer.

What does P and PI control mean?

P control: Proportional control.

By using a P control, the controller will change the flow temperature proportional to the difference between a desired and an actual temperature, e.g. a room temperature.

A P control will always have an offset which not will disappear over time.

PI control: Proportional and Integrating control.

A PI control does the same as a P control, but the offset will disappear over time.

A long ‘Tn’ will give a slow but stable control, and a short ‘Tn’ will result in a fast control but with a higher risk of unstability.

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Danfoss District Energy

Installation Guide ECL Comfort 310, application A361

8.2 Definitions

The definitions apply to the Comfort 210 as well as ECL Comfort

310 series. Consequently, you might come across expressions that are not mentioned in your guide.

Air duct temperature

Temperature measured in the air duct where the temperature is to be controlled.

Alarm function

Based on the alarm settings, the controller can activate an output.

Anti-bacteria function

For a defined period, the DHW temperature is increased in order to neutralize dangerous bacteria, e.g. Legionella.

Balance temperature

This setpoint is the basis for the flow / air duct temperature. The balance temperature can be adjusted by the room temperature, the compensation temperature and the return temperature. The balance temperature is only active if a room temperature sensor is connected.

Comfort operation

Normal temperature in the system controlled by the schedule.

During heating the flow temperature in the system is higher to maintain the desired room temperature. During cooling the flow temperature in the system is lower to maintain the desired room temperature.

Comfort temperature

Temperature maintained in the circuits during comfort periods.

Normally during daytime.

Compensation temperature

A measured temperature influencing the flow temperature reference / balance temperature.

Desired flow temperature

Temperature calculated by the controller on basis of the outdoor temperature and influences from the room and / or return temperatures. This temperature is used as a reference for the control.

Desired room temperature

Temperature which is set as the desired room temperature. The temperature can only be controlled by the ECL Comfort controller if a room temperature sensor is installed.

If a sensor is not installed, the set desired room temperature however still influences the flow temperature.

In both cases the room temperature in each room is typically controlled by radiator thermostats / valves.

Desired temperature

Temperature based on a setting or a controller calculation.

Dew point temperature

Temperature at which the humidity in the air condensates.

DHW circuit

The circuit for heating the domestic hot water (DHW).

Factory settings

Settings stored on the ECL Application Key to simplify the set up of your controller the first time.

Flow temperature

Temperature measured in the flow at any time.

Danfoss District Energy VI.LG.M1.02

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Installation Guide ECL Comfort 310, application A361

Flow temperature reference

Temperature calculated by the controller on basis of the outdoor temperature and influences from the room and / or return temperatures. This temperature is used as a reference for the control.

Heat curve

A curve showing the relationship between actual outdoor temperature and required flow temperature.

Heating circuit

The circuit for heating the room / building.

Holiday schedule

Selected days can be programmed to be in comfort, saving or frost protection mode. Besides this, a day schedule with comfort period from 07.00 to 23.00 can be selected.

Humidity, relative

This value (stated in %) refers to the indoor moisture content compared to the max. moisture content. The relative humidity is measured by the ECA 31 and is used for the calculation of the dew point temperature.

Limitation temperature

Temperature that influences the desired flow / balance temperature.

Log function

The temperature history is displayed.

Master / slave

Two or more controllers are interconnected on the same bus, the master sends out e.g. time, date and outdoor temperature.

The slave receives data from master and sends e.g. desired flow temperature value.

Pt 1000 sensor

All sensors used with the ECL Comfort controller are based on the

Pt 1000 type (IEC 751B). The resistance is 1000 ohm at 0 °C and it changes with 3.9 ohm / degree.

Optimization

The controller optimizes the start time of the scheduled temperature periods. Based on the outdoor temperature, the controller automatically calculates when to start in order to reach the comfort temperature at the set time. The lower the outdoor temperature, the earlier the start time.

Outdoor temperature trend

The arrow indicates the tendency, i.e. whether the temperature rises or falls.

Refill water function

If the measured pressure in the heating system is too low (e.g.

due to a leakage), water can be supplemented.

Return temperature

The temperature measured in the return influences the desired flow temperature.

Room temperature sensor

Temperature sensor placed in the room (reference room, typically the living room) where the temperature is to be controlled.

Room temperature

Temperature measured by the room temperature sensor or the Remote Control Unit. The room temperature can only be controlled directly if a sensor is installed. The room temperature influences the desired flow temperature.

Schedule

Schedule for periods with comfort and saving temperatures. The schedule can be made individually for each week day and may consist of up to 3 comfort periods per day.

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Danfoss District Energy

Installation Guide ECL Comfort 310, application A361

Saving temperature

Temperature maintained in the heating / DHW circuit during saving temperature periods.

Pump control

One circulation pump is working and the other is the spare circulation pump. After a set time, the roles are exchanged.

Weather compensation

Flow temperature control based on the outdoor temperature.

The control is related to a user-defined heat curve.

2-point control

ON / OFF control e.g. circulation pump, change-over valve or damper control.

3-point control

Opening, closing or no action of the actuator for the motorized control valve. No action means that the actuator remains in its current position.

Danfoss District Energy VI.LG.M1.02

DEN-SMT/DK 119

Installation Guide ECL Comfort 310, application A361

Installer:

By:

Date:

120 DEN-SMT/DK VI.LG.M1.02

Danfoss District Energy

Installation Guide ECL Comfort 310, application A361

*087H9025*

*VILGM102*

Produced by Danfoss A/S © 07/2010

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