Danfoss ECL Comfort 110 Operating instructions

Operating Guide

ECL Comfort 110, application 116

(valid as of software version 1.08)

English version

www.danfoss.com

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How to navigate?

Safety Note

To avoid injury of persons and damages to the device, it is absolutely necessary to read and

observe these instructions carefully. 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.

Adjust temperatures and values.

Switch between menu lines.

Select / return.

2 sec.

Return to daily user menu.

What do the symbols mean?

Mode COMFORT<

Temp. 48@½

1000

The desired ow temperature is inuenced by for example return temperature.

The actuator closes the control valve.

The actuator opens the control valve.

The actuator does not activate the valve.

The pump is ON.

The pump is OFF.

The controller is in setback mode.

The controller is in pre-setback mode (the symbol is blinking).

The controller is in comfort mode.

The controller is in pre-comfort mode (the symbol is blinking).

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Table of contents

Table of contents Line Page

Constant temperature control of domestic hot-water systems (DHW)

User guide, installation & maintenance

Introduction 5

Settings overview 6

Daily use 7

Temperatures 7

Select control mode 8

Set your personal schedule 8

Maintenance 10

Date - time 1000 10

Flow temp. (ow temperature control) 2000 10

Temp. min. (ow temp. limit, min.) 2177 10

Temp. max. (ow temp. limit, max.) 2178 10

Return T limit (return temp. limitation) 4000 11

Limit (return temp. limitation) 4030 11

Gain - max. (return temp. limitation - max. inuence) 4035 12

Gain - min. (return temp. limitation - min. inuence) 4036 12

Intgr. time (time constant for return temp. limitation) 4037 13

Control param. (control parameters) 6000 14

Auto tuning 6173 14

Motor prot. (motor protection) 6174 15

Xp1 at 65 C (proportional band) 6184 15

Xp2 at 90 C (proportional band) 6129 15

Tn (integration time constant) 6185 16

Tn - idle (integration time constant) 6096 16

M1 run (running time of the motorized control valve) 6186 16

Nz (neutral zone) 6187 17

Open time 6094 18

Close time 6095 18

S2 idle 6097 18

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Table of contents

Application 7000 19

P1 exercise (pump exercise) 7022 19

M1 exercise (valve exercise) 7023 19

P1 frost T (frost protection) 7077 19

P1 heat T (heat demand) 7078 19

Standby T (standby temperature) 7093 20

Ext. (external override) 7141 20

Min. on time (min. activation time gear motor) 7189 20

Daylight (daylight saving time changeover) 7198 21

ECL address (master / slave address) 7199 21

Type 7600 22

Service 8000 23

Code no. 8300 23

Ver. (version no.) 8301 23

Backlight (display brightness) 8310 23

Contrast (display contrast) 8311 23

Language 8315 24

MOD address (MODBUS address) 8320 24

Installation 25

Mounting the ECL Comfort controller 25

Electrical connections - 230 V a.c. - in general 26

Electrical connections - 24 V a.c. - in general 27

Connecting the temperature sensors and the ECL BUS 28

Connecting the ow switch (FS) 28

How to identify your system type 29

Adapting the ECL Comfort 110 controller 31

Manual control 32

Placing the temperature sensors 33

Checklist, electrical connections 34

Frequently asked questions 35

Denitions 36

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Introduction

How to use this guide

The instructions is divided into six parts:

• Introduction

• Settings overview

• Daily use

• Maintenance

• Installation

• Check

Basic principles of application 116 for ECL Comfort 110

If the measured ow (DHW) temperature (S3) is lower than the desired DHW

temperature, the motorized control valve (M1) is opened gradually and vice versa.

The return temperature (S4) to the district heating supply should not be too high. If so,

the desired ow temperature can be adjusted (typically to a lower value) thus resulting

in a gradual closing of the motorized control valve, i.e. the return temperature will

decrease.

The circulation pump, P1, is ON when the desired ow temperature is higher than 20 °C

(factory setting) or the actual ow temperature (S3) is below 10 °C (factory setting).

Furthermore, a ow switch (FS) signal (terminals 11 + 12) can be applied in order to heat

the DHW separately on DHW demand (DHW tapping, DHW draw-o).

If a supply temperature sensor S2 is connected, the proportional band Xp is adapted

to the actual temperature in order to avoid control instability. In addition, an idle

temperature for the supply temperature can be maintained to minimize the heat-up

time for the DHW.

° C

S3

FS

Time

°C (degrees Celsius) is an absolute temperature whereas K (Kelvin) is a relative temperature.

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Settings overview

Line Page

Factory

setting

Your

setting

Temp. min. (ow temp. limit, min.) 2177 10

Temp. max. (ow temp. limit, max.) 2178 10

Limit (return temp. limitation) 4030 11

Gain - max. (return temp. limitation - max. inuence) 4035 12

Gain - min. (return temp. limitation - min. inuence) 4036 12

Intgr. time (time constant for return temp. limitation) 4037 13

Auto tuning 6173 14

Motor prot. (motor protection) 6174 15

Xp1 at 65 C (proportional band) 6184 15

Xp2 at 90 C (proportional band) 6129 15

Tn (integration time constant) 6185 16

Tn - idle (integration time constant) 6096 16

M1 run (running time of the motorized control valve) 6186 16

Nz (neutral zone) 6187 17

Open time 6094 18

Close time 6095 18

S2 idle 6097 18

P1 exercise (pump exercise) 7022 19

M1 exercise (valve exercise) 7023 19

P1 frost T (frost protection) 7077 19

P1 heat T (heat demand) 7078 19

Standby T (standby temperature) 7093 20

Ext. (external override) 7141 20

Min. on time (min. activation time gear motor) 7189 20

Daylight (daylight saving time changeover) 7198 21

ECL address (master / slave address) 7199 21

Type 7600 22

Code no. 8300 23

Ver. (version no.) 8301 23

Backlight (display brightness) 8310 23

Contrast (display contrast) 8311 23

Language 8315 24

MOD address (MODBUS address) 8320 24

10 °C

90 °C

50 °C

0.0

25 s

OFF

50 K

120 K

20 s

120 s

15 s

3 K

OFF

2.0 s

OFF

10 °C

20 °C

10 °C

OFF

3

ON

15

116

XXXX

16

10

English

5

!

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Daily use

Temperatures

Push any button to switch on the backlight.

Mode COMFORT

Temp. 48@½

Setting the desired DHW temperature

Change the desired temperature.

Temperature overview

2 sec.

Push the button to see the sensor (S3, S4, S2) temperatures, calculated Xp and ow switch

(FS) status.

Change between the temperature displays:

S3:

Actual ow temperature

Desired ow temperature

S3 des. T 48@

S3 act. T 49@

S4:

Actual return temperature

Desired return temperature limitation

S4 lim. T 50@

S4 act. T 24@

Calculated Xp, based on S2 temperature

Actual supply temperature

S2 act. T 78@

Xp actual 87K

Flow switch (FS) not activated = OFF

Flow switch (FS) activated = ON

FS status OFF

Push to exit ‘Temperature overview’.

If the temperature value is displayed as

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

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

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Daily use

Select control mode

During scheduled operation (AUTO), the symbols will show you the control mode.

Wednesday

Mode COMFORT<

Change the mode (AUTO, COMFORT, SETBACK, or STANDBY).

Set your personal schedule

It is only possible to set the personal schedules if the ECL Comfort 110 controller has a built-in

ECA 110 timer program.

04-01-12 8:32

Wednesday <

This display will show the current day and time.

Choose the day for which you wish to change the settings.

Today’s schedule

The rst display will show you the start of the rst comfort period (‘Start1’). See or change

the start of this period.

The rst bar will blink.

Wed ]]]][!]]]!!]

Start1

09:00

See or change the end (‘Stop1’) of the rst comfort period.

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Daily use

The next bar will blink.

Wed ]]]][!{]]!!]

Stop1 12:00

See or change the start (‘Start2’) of the next comfort period.

Wed ]]]][!{]]!!]

Start2 18:00

See or change the next start / stop periods, if necessary.

Wed ]]]][!{]]!!]

Stop2 22:00

The schedule has always two comfort periods a day. The start and stop times can be set in

half-hourly intervals (30 min.).

To arrange only one comfort period on a day: Set Start2 and Stop2 times to the same time

value.

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Maintenance

2 sec.

Enter the maintenance menus.

Date - time 1000

It is only necessary to set the correct date and time in connection with the rst use of the

ECL Comfort 110 controller or after a power break of more than 36 hours (see the chapter on

Adapting the ECL Comfort 110 controller).

Flow temp. (ow temperature control) 2000

Temp. min. (ow temp. limit, min.) 2177

Setting range Factory setting

-20 ... 110 °C 10 °C

Set the allowed min. ow temperature for your system. Adjust the factory setting, if

required.

Temp. max. (ow temp. limit, max.) 2178

Setting range Factory setting

10 ... 150 °C 90 °C

Set the allowed max. ow temperature for your system. Adjust the factory setting, if

required.

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

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Maintenance

The controller automatically changes the desired ow temperature to obtain an accept-

able return temperature when the return temperature falls below or gets higher than the

set limit.

Inuence

‘Gain - min.’ > 0

‘Limit’

‘Gain max.’ > 0

Return temperature

‘Gain - max.’ < 0

‘Gain - min.’ < 0

This limitation is based on a PI regulation where P (Gain) responds quickly to deviations

and I (Intgr. time) responds slower and over time removes the small osets between the

reference and actual measured values. This is done by changing the ow temperature

reference.

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

Limit (return temp. limitation) 4030

Setting range Factory setting

10 ... 110 °C 50 °C

Set the return temperature you accept for the system.

Set the acceptable return temperature limit.

When the return temperature falls below or gets higher than the set value, the controller

automatically changes the desired ow temperature to obtain an acceptable return

temperature. The inuence is set in lines 4035 and 4036.

A recommended setting value for ‘Limit’ in DHW systems with constant ow has the same

value as the desired DHW temperature.

This prevents that the return temperature limitation is activated when idle (no DHW tapping

/ DHW draw-o).

Return T limit (return temp. limitation) 4000

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Maintenance

Gain - max. (return temp. limitation - max. inuence) 4035

Setting range Factory setting

-9.9 ... 9.9 0.0

Determines how much the ow(DHW) temperature will be inuenced if the return temperature is

higher than the desired ‘Limit’ (line 4030) (P control).

Inuence higher than 0:

The desired ow temperature is increased, when the return temperature gets higher

than the set limit.

Inuence lower than 0:

The desired ow temperature is decreased, when the return temperature gets higher

than the set limit.

Example

The return limit is active above 50 °C.

The inuence is set to -2.0.

The actual return temperature is 2 degrees too high.

Result:

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

Normally, the setting in line 4035 is lower than 0 in district heating systems to avoid a too

high return temperature.

Typically, the setting in line 4035 is 0 in boiler systems because a higher return temperature

is acceptable (see also line 4036).

Gain - min. (return temp. limitation - min. inuence) 4036

Setting range Factory setting

-9.9 ... 9.9 0.0

Determines how much the ow temperature will be inuenced if the return temperature is lower than

the desired ‘Limit’ (line 4030) (P control).

Inuence higher than 0:

The desired ow temperature is increased, when the return temperature gets below the

set limit.

Inuence lower than 0:

The desired ow temperature is decreased, when the return temperature gets below the

set limit.

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Maintenance

Example

The return limit is active below 50 °C.

The inuence is set to -3.0.

The actual return temperature is 2 degrees too low.

Result:

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

Normally, the setting in line 4036 is 0 in district heating systems because a lower return

temperature is acceptable.

Typically, the setting in line 4036 is higher than 0 in boiler systems to avoid a too low return

temperature (see also line 4035).

If the return temperature measurement is used as thermometer function only, the settings

in lines 4035 and 4036 should be 0.0.

Intgr. time (time constant for return temp. limitation) 4037

Setting range Factory setting

OFF / 1 ... 50 s 25 s

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

OFF: The control function is not inuenced by the ‘Intgr. time’.

1: The desired temperature is adapted quickly.

50: The desired temperature is adapted slowly.

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Maintenance

Control param. (control parameters) 6000

Auto tuning 6173

Setting range Factory setting

ON / OFF OFF

Automatically determines the control parameters for the DHW control. Lines 6184, 6129, 6185, 6186 and

6187 do not need to be set, when using auto tuning.

OFF: Auto tuning is not activated.

ON: Auto tuning is activated.

The auto tuning function automatically determines the control parameters for

DHW control. Thus you do not need to set the lines 6184, 6129 and 6185, as they are

automatically set to the auto tuning function.

Auto tuning is typically used in connection with the installation of the controller, but it

can be activated when needed, e.g. for an extra check of the control parameters.

Before starting the auto tuning, the tapping (draw-o) ow should be adjusted to the

relevant value (see table below).

Recommended DHW tapping (DHW draw-o) load

No. of apartments Heat transfer (kW) Constant tapping load (l / min)

1-2 30-49 3 (or 1 tap 25% open)

3-9 50-79 6 (or 1 tap 50% open)

10-49 80-149 12 (or 1 tap 100% open)

50-129 150 -249 18 (or 1 tap 100% + 1 tap 50% open)

130-210 250-350 24 (or 2 taps 100% open)

If possible, any additional DHW consumption should be avoided during the auto

tuning process. Should the tapping (draw-o) load vary too much, the auto tuning and

controller will return to the default settings.

Auto tuning is activated by setting the function to ON. When the auto tuning is ended,

the function is automatically converted to OFF (default setting). This will be indicated in

the display.

The auto tuning process takes up to 25 minutes.

The motor protection function (line 6174) has to be deactivated during auto tuning.

During auto tuning the circulation pump for tap water must be switched o. This is done

automatically if the pump is controlled by the ECL controller.

Auto tuning is only applicable in connection with valves that are approved for auto tuning,

i.e. the Danfoss types VB 2 and VM 2 with split characteristic.

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Maintenance

Motor prot. (motor protection) 6174

Setting range Factory setting

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.

Xp1 at 65 C (proportional band) 6184

Setting range Factory setting

1 ... 250 K 50 K

Set the desired proportional band when the supply temperature (S2) is 65 °C.

A higher value will result in a stable but slow control of the ow temperature.

Xp2 at 90 C (proportional band) 6129

Setting range Factory setting

1 ... 250 K 120 K

Set the desired proportional band when the supply temperature (S2) is 90°C.

A higher value will result in a stable but slow control of the ow temperature.

Xp is related to the supply temperature, S2. Typically, when the S2 temperature increases,

Xp must increase. If the S2 sensor is not connected, the Xp value will be constant and equal

Xp1.

65 90

Xp

Xp2

Xp1

S2 [

o

C]

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Maintenance

Tn (integration time constant) 6185

Setting range Factory setting

5 ... 999 s 20 s

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

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

Tn - idle (integration time constant) 6096

Setting range Factory setting

5 ... 999 s 120 s

When there is no DHW tapping (DHW draw-o), the saving temperature is slowly

controlled at either S3 or S2 (see also the setting in 6097).

Set a high integration time constant to obtain a slow control.

Set a low integration time constant for a fast control.

M1 run (running time of the motorized control valve) 6186

Setting range Factory setting

5 ... 250 s 15 s

‘M1 run’ is the time it takes the controlled unit to move from fully closed to fully open

position. Set the ‘M1 run’ according to the example.

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.

Maintenance

Nz (neutral zone) 6187

Setting range Factory setting

1 ... 9 K 3 K

Set the acceptable ow temperature deviation.

Set the neutral zone to a high value if you can accept a high variation in ow

temperature. When the actual ow temperature is within the neutral zone, the controller

does not activate the motorized control valve.

The neutral zone is symmetrical around the desired ow 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 line 6185) to its max. value (999 sec.).

• Decrease the value for the ‘Xp’ (proportional band line 6184) until the system starts

hunting with a constant amplitude (it might be necessary to force the system by setting

an extreme value).

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

Temp. Critical time period

Time

This 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%.

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Maintenance

Open time 6094

Setting range Factory setting

OFF, 0.1 . . . 20.0 s OFF

Commands the actuator to open the valve for the set period of time when a DHW

tapping (DHW draw-o) starts.

OFF: The ow switch (FS) function is disabled.

0.1 .... 20 s: Forced opening time.

If the ow switch (FS) function is chosen, the override function cannot be activated and the

setting in ‘Ext. (external override) in 7141 should be OFF.

Close time 6095

Setting range Factory setting

0.1 . . . 20.0 s 2.0 s

Commands the actuator to close the valve for the set period when a DHW tapping (DHW

draw-o) stops.

0.1 .... 20 s: Forced closing time.

S2 idle 6097

Setting range Factory setting

OFF / ON OFF

If there is no DHW tapping (DHW draw-o), the S2 or the S3 temperature can be

maintained depending on the chosen setting in 6094, ‘Open time’.

When the setting in 6094 is OFF, the S2 temperature is not maintained.

When a ‘forced opening time’ is chosen in 6094, the setting in 6097 results in the

following:

OFF: The S3 temperature is maintained (assuming that a DHW circulation is

present).

ON: The S2 temperature is maintained (assuming that a DHW circulation is not

present).

Maintenance

P1 exercise (pump exercise) 7022

Setting range Factory setting

ON / OFF OFF

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

ON: The pump is switched ON for 1 minute every third day around noon.

OFF: The pump exercise is not active.

M1 exercise (valve exercise) 7023

Setting range Factory setting

ON / OFF OFF

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

ON: The valve receives a signal to open and close every third day around noon.

OFF: The valve exercise is not active.

P1 frost T (frost protection) 7077

Setting range Factory setting

OFF / -10 ... 20 °C 10 °C

When the DHW temperature is below the set temperature in ‘P1 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 ow temperature (S3) is

below the set value.

P1 heat T (heat demand) 7078

Setting range Factory setting

-20 ... 50 °C 20 °C

When the desired ow temperature is above the set temperature in ‘P1 heat T’, the controller

automatically switches ON the circulation pump to meet the heat demand.

-20 ... 50: The circulation pump is ON above the set value.

Application 7000

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Maintenance

Standby T (standby temperature) 7093

Setting range Factory setting

5 ... 40 °C 10 °C

Set the desired ow temperature at standby.

5 ... 40: Desired standby ow temperature.

Ext. (external override) 7141

Setting range Factory setting

OFF / SETBACK / COMFORT OFF

Choose mode for ‘Ext.’ (external override).

The override can be activated for setback or comfort mode. For override, the controller

mode must be AUTO (scheduled operation).

OFF: The controller's schedule is not overridden.

SETBACK: The controller is in setback mode when terminals 11 and 12 are

short-circuited.

COMFORT: The controller is in comfort mode when terminals 11 and 12 are

short-circuited.

If the ow switch (FS) function is chosen in ‘Open time’ in 6094, the override function cannot

be activated and the setting in ‘Ext. (external override) in 7141 should be OFF.

Min. on time (min. activation time gear motor) 7189

Setting range Factory setting

2 ... 50 3

The min. pulse length in milliseconds for activation of the gear motor.

Setting Value x 20 ms

2 40 ms

10 200 ms

50 1000 ms

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Danfoss ECL Comfort 110 Operating instructions

Danfoss ECL Comfort 110 Operating instructions

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