Danfoss ECA 86 Operating instructions

Brand: Danfoss

Model: ECA 86

Type: Operating instructions

DH-SM VI.BA.V2.02 © Danfoss 2003/09 1

087R9593

Instructions

ECA 86 temperature alarm

module for ECL Comfort 300/301

About these instructions

These instructions are for the ECA 86 temperature alarm module for the ECL Comfort 300/

301 series.

The instructions provide an introduction to the ECA 86 temperature alarm module,

instructions for installing and operating the module, as well as a brief section about

dierent error conditions that may occur.

Further information about the ECL Comfort is available in the ECL Comfort User’s Guide for

the relevant application.

Contents

About the ECA 86.............................................2

In general ............................................................2

Functionality ......................................................2

I/O conguration..............................................3

Installation ..........................................................3

Requirements ....................................................3

Hardware installation......................................4

Installing the module......................................4

Cabling.................................................................5

Software installation .......................................6

New ECL Comfort controller.........................6

ECL Comfort controller already in use ......6

Operation............................................................7

Reading temperatures....................................7

Setting the maximum temperature ..........7

Disabling alarms ...............................................7

Verifying the installation................................8

Error conditions ................................................8

Module not functioning ................................8

Sensor error........................................................8

2 VI.BA.V2.02 © Danfoss 2003/09 DH-SM

About the ECA 86 ECA 86 Instructions

About the ECA 86

In general

The ECA 86 temperature alarm module is for the ECL Comfort 300/301 series only.

Ordering Information:

Description Code number

ECA 86 temperature alarm module 087B1158

Socket for ECL Comfort 200/300/301 087B1149

ESM-11 (Pt 1000 temperature sensor), surface sensor type 087B1165

ECA 86 temperature alarm module for ECL Comfort 300/301

instructions

087R9593

Functionality

The purpose of the ECA 86 module is to enable monitoring and maximum limiting of

domestic hot-water temperature. When the domestic hot-water temperature rises above a

preset maximum limit, the ECA 86 module will generate an alarm. To indicate the alarm:

• The ECL Comfort display ashes

• By means of a relay output, the ECA 86 module can switch on an external device, for

example a lamp.

With the ECA 86 module installed, the ECL Comfort can monitor temperatures at up to four

extra locations. The actual temperature readings are visible in the ECL Comfort display but

they are not used for automatic control of temperatures in the heating system. One of the

measured temperatures can be used to generate alarms. Figure 1 shows an example of the

placement of sensors in a hot-water circuit.

Figure 1. Application example

Domestic hot-water temperature

Alarm ON after Alarm OFF after 0-28 seconds

max.10 seconds

tmax

5 K

tref

Time

DH-SM VI.BA.V2.02 © Danfoss 2003/09 3

Instructions ECA 86 Installation

When the hot-water temperature (at S7 in Figure 1) rises above the preset maximum

temperature limit, an alarm is generated within a period of 10 seconds. The ECL Comfort

display starts ashing and a connected external device is activated. These alarm indications

persist while the hot-water temperature remains above the maximum limit.

The alarm will go o when the hot-water temperature drops below the maximum limit

minus 5 K. After this temperature is detected, there is a delay of 0 – 28 seconds before the

alarm indications disappear (display stops ashing, external device is switched o). The

alarm function is illustrated in Figure 2.

Figure 2. ECA 86 alarm function.

I/O conguration

The ECA 86 module provides the ECL Comfort with:

• 4 Pt 1000 inputs

• 1 relay output.

For further information about inputs and outputs of the ECA 86 module, see page 5.

Installation

Requirements

The ECA 86 module is power supplied via the ECL Comfort system device bus. In order for

this bus to function properly, an outdoor temperature sensor must be connected to the

ECL Comfort.

When several ECL Comfort controllers are connected in a network, only one ECA 86

module can be present in the network and this module must be installed in the master ECL

Comfort controller. See the ECL Comfort User’s Guide (grey section, Installation and Mainte-

nance) for further information on ECL Comfort networking.

4 VI.BA.V2.02 © Danfoss 2003/09 DH-SM

Installation ECA 86 Instructions

Hardware installation

Installing the module

1. You need an ECL Comfort socket

and the ECA 86 module. The cables

soldered to the ECA 86 module are

used to connect the module to the

system device bus.

2. Remove each of the 2 plastic aps

covering the openings in the socket by

inserting a screw driver in the groove.

Discard the aps.

3. Pass the cables through the opening in

the socket, as illustrated.

4. Proceed to insert the base of the

module and then gently press to click

the rest of the module into place.

Figure 3. Installing the ECA 86 module in the socket

DH-SM VI.BA.V2.02 © Danfoss 2003/09 5

Cabling

Figure 4. Terminals of the ECL Comfort

Figure 4 shows the terminals on the inside of the ECL Comfort socket, with the ECA 86

module installed. The terminals for the ECA 86 are placed at the bottom of the socket.

Therefore, it is most practical to begin by installing the cables for the ECA 86 and then pro-

ceed to install signal and other cables for the ECL Comfort controller itself.

As shown in Figure 4, the system device bus cables of the ECA 86 module must be con-

nected to terminals15 and 16.

The terminal assignments of the ECA 86 module are as follows:

Terminal Description Terminal Description

24, 26

Relay, NO (normally open)

function

30 Sensor S7

25, 26

Relay, NC (normally closed)

function

31 Sensor S8

32 Sensor S9

33 Sensor S10

For sensor connections, the permissible cable cross-section is 0.5 mm

. The maximum

cable length is 10 m.

Note:

The total length of the cabling for sensors and system device bus must not exceed 125 m.

If you are having diculty connecting several cables to terminal 34 (sensor common), use

one of the larger common terminals immediately above the sensor terminals.

For further details on installation, see the ECL Comfort User’s Guide (grey section,

Installation and Maintenance).

Instructions ECA 86 Installation

6 VI.BA.V2.02 © Danfoss 2003/09 DH-SM

Installation ECA 86 Instructions

Software installation

New ECL Comfort controller

The following instructions apply when using an ECL Comfort controller that has not been

programmed by copying a system set-up from an ECL Card.

After completing the cabling and powering on the ECL Comfort controller, you are ready to

begin the software installation:

1. Open the lid on the front side of the controller.

2. Place the ECL Card with the yellow side facing you. This enables the controller to read

the ECL Card data.

The controller immediately starts copying the factory settings and heating system type

from the ECL Card.

After copying, the display will show the

heating system type that the controller is set

up to control.

After approximately 10 seconds, the display

changes to display line C.

Note that after this display appears, there is

a delay of 28 seconds before the ECL Com-

fort controller has detected the presence of

the ECA 86 module.

ECL Comfort controller already in use

When using an ECL Comfort controller that has already been in operation before the instal-

lation of the ECA 86 module, you need to copy a system set-up from a new ECL Card sup-

porting the ECA 86 module before the module is operational. See the ECL Comfort User’s

Guide for instructions.

The section “Verifying the installation” on page 8 tells you how to ensure that the ECA 86

module is correctly installed.

Instructions ECA 86 Operation

Operations

Reading temperatures

The four temperature values measured by the ECA module are displayed as indicated in

the table – with the grey side of the ECL card facing you:

Sensor Circuit Display line Sensor Circuit Display line

S7 II C S9 II 2

S8 II 1 S10 II 3

To read the actual temperatures:

1. Ensure that the grey side of the ECL Card is facing you.

2. Press to select circuit II.

3. Use and to access the relevant display lines.

Setting the maximum temperature

The maximum temperature limit, which determines when an alarm is generated, is acces-

sible in the same display as the S7 temperature (see example above), at the lower, right-

hand corner.

The default value is 65 °C, the range is –20 - 110 °C.

To modify the maximum temperature setting:

1. Proceed as indicated above to select display line C.

2. Use and to adjust the maximum temperature setting.

Disabling alarms

To disable the alarm indication, proceed as indicated above to set the maximum tempera-

ture limit to its maximum value (110 °C).

This is an example of the display picture showing:

The actual temperature measured at sensor S7

The maximum temperature setting.

Verifying the installation

1. Check that actual temperature values from all sensors connected to the ECA 86 module

are displayed.

2. Set the maximum temperature limit well below the actual temperature reading from

sensor S7. Verify that an alarm is generated within a period of 38 seconds (there is a

28 second delay before the new maximum temperature limit is eective, after this the

alarm is generated within 10 seconds).

If you are experiencing trouble, see the section “Error conditions” below.

When all is functioning properly, set the maximum temperature limit as required, and place

the ECL Card with the yellow side facing you, ready for normal operation.

Error conditions

This section provides support for locating and correcting error conditions that may arise

after the installation of the ECA 86 module.

Module not functioning

If the ECA 86 module is not properly installed or the module itself should prove faulty, no

temperature values will be displayed (display shows – – in line C, 1, 2 and 3 for circuit II).

The maximum temperature limit will be displayed because the default value is read from

the ECL Card.

To correct this error, you should check the connection of the system device bus to the

ECA 86 module (see page 5):

• Is one of the cables disconnected?

• Have the cables been switched?

Sensor error

A temperature sensor error may be caused by:

• A disconnected sensor. The corresponding display will show – –.

• A short-circuited sensor. The corresponding display will show – – –.

To locate the cause of the error, check the following:

• Are the cables of the sensor in question connected correctly?

• Do the cables show any sign of damage?

• Is the error caused by a malfunctioning Pt 1000 sensor? Try replacing the sensor to see

whether the error condition persists.

Note:

If sensor S7 is disconnected or short-circuited, an alarm is generated. It is possible to

disable the alarm by setting the maximum temperature limit to 110 °C.

Verifying the installation ECA 86 Instructions

Danfoss ECA 86 Operating instructions

Danfoss ECA 86 Operating instructions

Danfoss ECA 86 Operating instructions

Related papers

Other documents