BC-HM VI.76.H6.02 Danfoss 9/97 1
Instructions
ECL 9370
Software generation 24 (see P0.1: 2.4)
087R9438
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
ST = Safety thermostat
BC-HM VI.76.H6.02 Danfoss 9/97 5
ST = Safety thermostat
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,
positionP8.3).
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
40minutes.
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
ECL9370 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)
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