Danfoss ECL 9370 Operating instructions

BC-HM VI.76.H6.02  Danfoss 9/97 1

Instructions

ECL 9370

Software generation 24 (see P0.1: 2.4)

087R9438

Master/slave controller ..................... 17

Override control with ECA 9010 ...... 18

Digital settings ........................... 18 - 35

- Display, switch, (+), () and SET keys

- Position selection

- Value changing

- Row 0 - Status, generation

- Row 1 - Outdoor temperature

- Row 2 - Storage tank temperature

- Row 3 - Radiator circuit

- Row 4 - Hot-water-service

- Row 5 - Room temperature

- Row 6 - Return temperature, radiator

circuit

- Row 7 - Return temperature, radiator

circuit

- Row 8 - Diverse function selections

- Row 9 - Diverse settings

Testing sensors and controller ....... 36

Manual valve control ........................ 36

Installation ..................................37 - 40

Overview ........................................... 44

Contents

System examples and electrical

diagrams ........................................2 - 7

Electrical connections ................... 8 - 9

- Connections with 230 V

- Connection of sensors and remote

controls

Function ECL 9370............................ 10

Controller settings ..................... 10 - 16

User settings ....................................... 10

Potentiometer settings ........................ 13

Special functions, explanation ........ 15

- Heat time

- Run-on time (P2)

- Min. flow limitation

- Gradual cut-in after reduced

temperature

- Limitation of return temperature

- Pump function P3

2 VI.76.H6.02  Danfoss 9/97 BC-HM

ST = safety thermostat

BC-HM VI.76.H6.02  Danfoss 9/97 3

ST = Safety thermostat

4 VI.76.H6.02  Danfoss 9/97 BC-HM

ST = Safety thermostat

BC-HM VI.76.H6.02  Danfoss 9/97 5

ST = Safety thermostat

6 VI.76.H6.02  Danfoss 9/97 BC-HM

Special application

If the temperature in the hot-water

storage tank is too low, valve M2 opens.

The water in the cylinder then becomes

heated and when the required

temperature has been reached, valve

M2 closes again.

The hot-water-service cut-in temperature

can be obtained by subtracting the P4.3

setting from the potentiometer k

setting.

The hot-water-service cut-out

temperature can be obtained by

subtracting the P4.4 setting from the

potentiometer k setting.

Control of the temperature in the radiator

heating circuit can be influenced when

heating the service water.

Either

1) normal weather compensated flow

temperature

or

2) reduced flow temperature

See page 35 for function selection in

P9.5.

ST = Safety thermostat

BC-HM VI.76.H6.02  Danfoss 9/97 7

ST = Safety thermostat

8 VI.76.H6.02  Danfoss 9/97 BC-HM

Terminal Load

Phase (L) 14 -

Neutral (N) 13 -

Circulation pump (radiator circuit) P1 18 8 (2) A 230 V ~

Charge pump/changeover valve - P2 20 8 (2) A 230 V ~

Hot-water-service charge pump - P3

24 8 (2) A 230 V ~

(circulation pump)

16 (close) 8 (2) A 230 V ~

Reversible motor AMV / AMB

17 (open) 8 (2) A 230 V ~

Connections with 230 V (terminals 13 - 14)

Connection of sensors and remote controls

Safety voltage (terminals 1 - 12)

The installation of sensors and remote controls is thoroughly described in the

accompanying product instructions.

The following sensors must be connected to ECL 9370:

Lead cross-section: 0.75 - 1.5 mm

2

Max. length: 50 m

Electrical connections

Electrical connections must be made

using the terminal strips with screw

terminals. The terminal strips can be

removed from the socket.

Each terminal will take up to 3 × 1.5 mm

2

leads. The terminals are coded to

prevent mains voltage and sensor

connections being swapped over.

Type Terminal Designation

Outdoor temperature sensor ESMT 11 - 12 S1

Flow temperature sensor - radiator circuit ESMA/-C/-U 10 - 11 S3

Hot-water-service temperature sensor

*

) ESMB/-U 7 - 9 S4

*

) ECL 9370 is also able to control without a hot-water-service temperature sensor. In such a

case, only the radiator circuit will be controlled.

ECL 9370 can then control flow

temperature in the radiator circuit in

relation to the outdoor temperature, and

the hot-water-service temperature.

BC-HM VI.76.H6.02  Danfoss 9/97 9

In addition, the following sensors, remote

controls and override units can be

connected:

If only one sensor is used for cutting in

and out hot water heating, it must be

connected to terminals 7 - 9.

Lead cross-section: Min. 0.4 mm

3

Max. length: 50 m

Max. total length (sensor and BUS leads):

150 m

(If these maximum lengths are exceeded

there will be a risk of electrical

disturbance).

Please note:

Lead resistance can give rise to

incorrect temperature measurement. A

resistance of 4 ohm corresponds to an

increase of 1 degree in the measured

value.

Extra safety: The valve closes if the

flow sensor (terminals 10-11) is not

connected.

*

) The lower sensor (terminals 8 - 9) must be used for cutting out hot-water heating.

The upper sensor (terminals 7 - 9) must be used for cutting in hot-water heating.

Type Terminal Designation

Return temperature sensor ESMA/-C/-U 4 - 6 S6

Lower hot-water-service temperature sensor

*

) - when

ESMB/-U 8 - 9 S2

using two sensors in the hot-water storage tank.

Alternative: Sensor input can be used as a

Pt 1000 8 - 9

thermometer.

Remote control with built-in room temperature

ESMF-3 3 - 4 S5

sensor and override facility

or

Room temperature sensor ESMR 4 - 5 S5

Alternative: Sensor input can be used as a

Pt 1000 4 - 5

thermometer

or

Control panel ECA 9020 with time switch,

optimizer and room temperature sensor.

ECA 9020 1 - 2

Control panel also able to display actual and

calculated system temperatures.

Override module for overriding the built-in

ECA 9010 1-2-(5/6/8)

time switch. Override switch and module must be

connected.

Min. flow limiter. Signal contact (NO) and flow

10 - 11

sensor must be connected in parallel.

10 VI.76.H6.02  Danfoss 9/97 BC-HM

Function ECL 9370

Control of radiator circuit temperature:

The required flow temperature (see P3.1)

is calculated from the outdoor

temperature, room temperature and

return temperature and controlled via the

valve.

Control of hot-water-service temperature:

The required charging temperature is set

using the

potentiometer on the front

of the controller. The radiator ciruit is cut

out during hot water heating, but parallel

operation can be selected (P3.2).

The controller is available with a

2-channel digital time switch which

allows control of the radiator circuit and

hot-water-service time-independently of

each other (see digital settings,

positionP8.3).

b) Selection switch

The selection switch can be set from 0 to

9. The table below shows the information

that can be read from controller display

(c) when one of the ten positions is

selected.

Controller settings

User settings

a) Programme time switch (analog or

digital)

b) Selection switch

c) Display

d) Temperature setting

e) Function switch

f) User instruction/Plug for diagnostic

apparatus

a) Programme time switch

The actual time and, if required, the day

of the week is set opposite the arrow.

Reduced temperature can be set by

moving the slides towards the centre.

The digital time switch must be

programmed as described in the

accompanying instruction.

Setting Information

0 Pumps and valve status

1 Outdoor temperature

Hot-water-service temperature

2 (2nd sensor) (lower sensor) or

thermometer

3 Flow temperature in radiator circuit

Hot-water-service temperature

4

(1st sensor) (upper sensor)

5 Room temperature or thermometer

6 Return temperature (accumulated)

7 None

8 None

9 None

The switch can also be used for

programming in connection with a

number of other settings.

BC-HM VI.76.H6.02  Danfoss 9/97 11

d) Temperature setting

The function of this knob depends on the

setting in position P8.4 (see digital

settings).

Weather compensation with max. room

temperature limitation or adaptive

reference room control can be selected

here.

Weather compensation

Flow temperature in the radiator circuit

can be increased (+8) or reduced (8) by

turning the knob (parallel displacement

of the heat curve).

The slope of the heat curve will influence

parallel displacement:

Max. room temperature limitation

When ESMR/F is connected, the room

temperature is limited to a set max.

value. This value is factory set at 22 °C,

but can be changed in position P5.2 (see

digital settings). The amplification factor

can be selected in position P9.2.

Adaptive reference room control

The heat curve is automatically adapted

to the heat requirement. The room

temperature can be increased and

decreased with the temperature setting

knob. The setting range for room

temperature is 22 ±8 °C. The knob mid-

point can be changed in position P5.2

(see digital settings). The amplification

factor can be changed in position P9.2.

Parallel displacement of heat

Temperature curve for different heat curve

setting slopes

0.5 1.0 1.5 2.0 2.5 3.0

8 4 8 12 16 20 24

4 2 4 6 8 10 12

0 000000

+4 +2 +4 +6 +8 +10 +12

+8 +4 +8 +12 +16 +20 +24

These are correction values for flow reference

temperatures

12 VI.76.H6.02  Danfoss 9/97 BC-HM

key displays combinations of

pumps that can be cut-in or cut-out:

Pump Pump Pump

(18) (20) (24)

00 0

10 0

01 0

11 0

00 1

10 1

01 1

11 1

0 = cut-out

1 = cut-in

Finally, all time constant dependent

functions are cancelled. I.e. no time

delay at temperature measuring and

potentiometer settings.

>|< Standard function

Heating system control in

accordance with preprogrammed

values. Parallel operation cuts out

and time control made inoperative.

All potentiometer settings

overridden. Override values

correspond to middle potentiometer

settings.

f) User instruction

The slot under the time switch houses a

short user guide.

Function switch

Heat supply to radiators stopped,

but hot-water-service control

remains unchanged. The heating

system is frost-protected.

Reduced temperature

Time programme overridden.

Constant control in accordance with

the reduced temperature.

Automatic switch between normal

and reduced temperature via time

switch programme.

Normal temperature

Time programme overridden and

constant control in accordance with

the normal temperature.

Manual operation

All control functions inoperative.

Control valve inactive. The valve

can be opened or closed manually

by turning knob (d) completely time

clockwise or countertime clockwise.

Pump outputs can be controlled

manually: Place switch (b) in

position 0 and press key - until

the display shows a number of bars

or until no display can be observed.

Repeated operation of the SET

BC-HM VI.76.H6.02  Danfoss 9/97 13

Potentiometer settings

g) Heat curve slope

h) Min. limitation of flow temperature

i) Max. limitation of flow temperature

j) Level of reduced temperature

k) Required temperature in charge

circuit for hot-water-service

14 VI.76.H6.02  Danfoss 9/97 BC-HM

g) Setting of heat curve slope

The heat curve slope can be set in the

range 0.2 - 3.4

If a satisfactory room temperature cannot

be reached when the outdoor

temperature is lower than +5 °C, the

slope can be increased by turning

potentiometer (g). When the outdoor

temperature is higher than +5 °C, the

heat curve can be parallel-displaced with

knob (d).

Reduced temperature with room

temperature sensor (ESMR/F)

(controlled room temperature)

Reduction of room temperature in

connection with reduced temperature is

shown in the above diagram.

The diagram shows, when no set-back,

that the room temperature is 22 °C. This

value is selectable in P5.2 (see Digital

Settings).

The diagram also shows that the

following values can be obtained during

AUTO operation:

Examples of heat curve setting

h) Min. flow temperature

Min. flow temperature in the radiator

circuit can be set in the range 10 - 70

°C.

i) Max. flow temperature

Max. flow temperature in the radiator

circuit can be set in the range

30-110

°C.

Max. limiting value has higher priority

than min. limiting value.

j) Level of reduced temperature

The level of reduced temperature can be

set at a fixed value (1 to 8) or to an

outdoor-temperature-dependent value

(AUTO). Each graduation on the scale

corresponds to 1

°C room temperature.

Reduced temperature stop - see P1.3.

Floor

Outdoor Radiator

heating

temperature

*

) (80 °C)

(40 °C)

25 °C 1.2 0.4

15 °C 1.6 0.5

10 °C 1.8 0.6

*

) Sized outdoor temperature. The lowest occurring

outdoor temperature during the heating season is

normally used.

Reduction

Outdoor

temperature

P1.3 = -30 P1.3 = -15 P1.3 = 0

+10 5.3 4.6 2.9

+5 1.5

0 4 2.7 0

5

10 2.7 0.9

15 0

20 1.3

25

30 0

BC-HM VI.76.H6.02  Danfoss 9/97 15

Total stop

The system can be cut out so that a flow

temperature of only 10 °C is maintained

in connection with reduced temperature,

see P8.4. During total stop, no account is

taken of room temperature.

k) Required flow temperature in

charging circuit

For service water heating, the flow

temperature in the charging circuit can

be set within the range 30 - 110 °C.

Factory setting: 70 °C.

Note:

Hot-water-priority or parallel operation

must be set digitally in P3.2 (see digital

settings). The hot-water-service

conditions must be set in P4.3 og P4.4.

Reduced temperature without room

temperature sensor

Reduction of flow temperature in

connection with reduced temperature

can be seen in the above diagram.

(example of heat curve slope 1.0). The

table shows different settings (2, 4, 6

and AUTO).

switch to room heating is not accepted, a

run-on time in minutes for pump P2 can

be set in P9.3.

If a certain run-on time is set, the control

valve closes after service water heating

has been completed. After the set run-on

time, pump P2 cuts out and pump P1

(radiator circuit) cuts in. Finally, the

control valve opens.

Min. flow limitation

If the valve is almost closed, a signal

switch in the motor can override

controller ECL 9370 and completely

close the valve. After a set time (P9.3)

the valve is opened again.

(Connection, see page 9).

Special functions

Heat time

The heating-up time is monitored when

the service water in the hot-water-

storage tank is being heated.

When water heating takes more than 40

minutes there are two possibilities:

A: If the cut-in temperature is exceeded

- system switch to radiator heating.

B: If the required cut-in temperature is

not exceeded, service water heating

remains cut-in for a further

40minutes.

Run-on time, charge pump (P2)

When service water heating has been

completed, room heating is cut in

immediately on demand. If immediate

16 VI.76.H6.02  Danfoss 9/97 BC-HM

Gradual cut-in after reduced

temperature period in radiator circuit

or finished priority at service water

heating

ECL 9370 contains a function which can

be set to determine the time rate at

which the radiators are to be heated.

This function protects the boiler and

district heating system against

momentary overload.

Setting, see P9.3.

Limitation of return temperature in

radiator circuit

ECL 9370 can be set for the gradual

(outdoor-temperature-dependent)

limitation of return temperature, i.e. the

lower the outdoor temperature, the

higher the permissible return

temperature.

The outdoor temperature at which a

certain return temperature (P6.3 and

P7.3) is permissible can be selected in

positions P6.4 og P7.4. The actual return

temperature must not be higher than the

setting in P7.3.

The return temperature function is not

active

- when the function switch is in

setting

- when the function switch is in

setting

- during total stop in connection with

reduced temperature (see P8.4)

Pump function P3

The pump cuts IN,

- either when the charging circuit

temperature has been reached

- or 3 minutes after service water

heating cut-in.

The pump cuts OUT, after the set after-

run time. This after-run time can last from

1 - 899 sec. and is set in P2.5 (See

Digital Settings).

If no hot-water-service charging

system is used, terminal 24 can be

used to control a circulation pump.

There is the possibility of setting an

independent time programme (see

P8.3).

Priority or parallel operation

Priority: At service water heating, the

heating of the radiator heating circuit is

stopped.

Parallel: When heating the service water,

it can be set to heat the radiator heating

circuit at the same time. The difference

between heating temperature for

service

water and radiator circuit is set in P3.2.

BC-HM VI.76.H6.02  Danfoss 9/97 17

MASTER/SLAVE controller

Several ECL and EPU controllers can

operate in one system. The ECL

controller with outdoor temperature

sensor is designated as MASTER

controller; the others are connected to

the BUS and are designated as SLAVE

controllers.

As a MASTER controller, ECL 9370 has

the following functions:

- Sends outdoor temperature signals to

the SLAVE controllers.

- Sends time signals to the SLAVE

controllers.

- Allocates SLAVE controller priority

signals when hot-water-service is

demanded.

- Receives reference temperatures

from the addressed SLAVE

controllers and controls in

accordance with the highest value.

- Supplies voltage to the BUS and

control panel ECA 9020 (if

connected).

Note:

During Total stop (see P8.4) the

ECL9370 MASTER controller does not

control using reference temperatures

from the SLAVE controllers.

As a SLAVE controller, ECL 9370 has

the following functions:

- All SLAVE controllers receive outdoor

temperature values via the BUS.

- Addressed SLAVE controllers (P9.5)

send a temperature reference value

back to the MASTER controller via

the BUS. The highest BUS reference

value is thus the temperature

reference value of the MASTER

controller.

- Closure of the control valve at service

water heating in MASTER control

circuit (in P9.5, the mid-digit must be

"2")

- Time control possible via built-in time

switch or the time switch in the

MASTER controller.

- Activation of the boost function.

Connection of MASTER/SLAVE controllers

18 VI.76.H6.02  Danfoss 9/97 BC-HM

Override control with ECA 9010

The time control of radiator and hot-

water-service circuits can be overridden

with the ECA 9010 module. The ECL

9370 function switch must be set on

to ensure override. The module can

override to normal temperature or

reduced temperature. See P8.5 for

setting. See ECA 9010 instruction for

connection.

Frost protection and pump control

Pump P1 in the radiator circuit is cut-in at

the following temperatures:

- Outdoor temperature lower than

+2°C

- Required flow temperature higher

than 20°C

Digital settings (programming)

Display, switch, (+), () and SET keys

The selector switch, display, (+), () and

SET keys can be used to check and

change a number of controller settings.

Each control and setting range is

associated with a certain position. The

table below shows how the different

positions can be selected.

012345

0P0.0 *P0.1 *----

1 P1.0 * P1.1 * P1.2 P1.3 - -

2 P2.0 * - - - - P2.5

3 P3.0 * P3.1 * P3.2 P3.3 P3.4 P3.5

4 P4.0 * P4.1 * P4.2 P4.3 P4.4 P4.5

5 P5.0 * - P5.2 - - -

6 P6.0 * P6.1 * P6.2 P6.3 P6.4 -

7 - - - P7.3 P7.4 -

8 - P8.1 * P8.2 # P8.3 # P8.4 # P8.5 #

9 - - P9.2 # P9.3 # P9.4 # P9.5 #

← () key Column 0-5 (+) key →

Row

0-9

Positions marked * cannot be changed.

Positions marked # contain up to three different functions. See also section Value changing.

BC-HM VI.76.H6.02  Danfoss 9/97 19

Value changing (columns 2-5)

1) Select the required position.

2) Activate the SET key once - the

display will flash.

3) Change the value with the (+) or ()

key.

4) Activate the SET key to store the

value.

If keys (+), (), SET or switch (b) are not

activated within 2 minutes of selecting a

position, automatic switch to column 0

will occur.

Note:

Positions marked # contain up to three

different functions. The values can be

changed by choosing one digit at a time.

On activating SET, a digit on the far right

will begin to flash. This digit can then be

changed using the (+) or () key.

On activating SET again, the middle digit

can be changed. On the third activation

of SET, the digit on the left can be

changed. All changed values can be

stored by pressing SET. The display will

now alternately show a value and a

position number.

Position selection

- Selector switch

can be used for

selecting rows 0-9.

- (+)- og () keys can be used for

selecting columns 0 - 5. However,

access to positions in columns 2 - 5

can only be gained by selecting P0.1

and pressing SET for 5 seconds.

Then, display will show P0.2 and all

positions become accessible.

- On selecting a position, the display

will alternatively show the position

number and the set value.

Note: In column 0 only the value is

displayed.

20 VI.76.H6.02  Danfoss 9/97 BC-HM

Row 0 - Status

Position Description

P0.0 Pumps and valve status

The operating condition of the control valve and pumps can be read from the

display as horizontal bars when the function is ON.

Manual pump cut-in on manual operation: See section

Function switch

P0.1 Software generation/access to columns 2-5

The generation code is shown in the display.

Hot-water-service pump (terminal 24)

Charge pump or changeover valve

(terminal 20)

Valve closes (terminal 16)

Valve opens (terminal 17)

Circulation pump (terminal 18)

Page is loading ...

Danfoss ECL 9370 Operating instructions

Danfoss ECL 9370 Operating instructions

Related papers

Other documents