BC-HM VI.76.X4.02 © Danfoss 10/97 1
Instruction ECL 9800
(This instruction applies to
software generation 20) See P0.1; 2.0
Contents
System principles .........................2 + 4
Electrical diagrams ...................... 3 + 5
Electrical connections .................. 5 - 6
- connections (230 V AC)
- connection of temperature sensors
MASTER/SLAVE-controllers ........... 7
ECL 9800, mode of operation ..... 8 - 9
Control settings .......................... 9 - 10
User settings
....................................... 9
a) program time switch
b) display
c) temperature setting
d) function switch
Potentiometer settings
................ 10 - 11
f) heat curve
g) min. flow temperature
h) reduced temperature
i) return temperature
Starting up and function testing......12
- status and temperature reading
- status
- temperatures
- setting after starting up
Digital settings .......................... 13 - 21
- display, switch and (+), (-) and
SET keys
- position selection
- value changing
- value presetting
- row 0 - Status
- row 1 - Outdoor temperature
- row 2 - Boiler circuit
- row 3 - Cut-in of boiler stages
- row 4 - Hot water service circuit
- row 5 - Room temperature
- row 6 - Return temperature
- row 7 - System time constants
- row 8 - Diverse function selection
- row 9 - Diverse settings
Mounting and dismantling ....... 22 - 23
Time control .................................... 24
087R9414
087R9414
2 VI.76.X4.02 © Danfoss 10/97 BC-HM
Principle 1
Principle 2
Principle 3
BC-HM VI.76.X4.02 © Danfoss 10/97 3
Wiring for principle 1 and 2
Wiring for principle 3
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Principle 4
Principle 5
BC-HM VI.76.X4.02 © Danfoss 10/97 5
Wiring for principle 4
Wiring for principle 5
Electrical connections
Electrical connections to the controller
are made using terminal boards with
screw terminals.
Up to 3 × 1.5 mm² or corresponding can
be connected to each terminal. The
terminals are coded so that units on
mains voltage cannot be connected on
the sensor side.
6 VI.76.X4.02 © Danfoss 10/97 BC-HM
Terminal Load
Live (L) 14 -
Neutral (N) 13 -
Circulation pump 16 8 (2) A 250 V a.c.
Boiler (stage 4) 17 - 18 8 (2) A 250 V a.c.
Boiler (stage 3) 19 - 20 8 (2) A 250 V a.c.
Boiler (stage 2) 21 - 22 8 (2) A 250 V a.c.
Boiler (stage 1) 23 - 24 8 (2) A 250 V a.c.
230 V AC connections (terminals 13 - 24)
Cable cross-section: 0.75 - 1.5 mm²
Max. length: 50 m
Connection of sensors, remote control and override module - safety voltage
(terminals 1 - 12)
The installation of sensors and remote controls is described in the associated product
instructions.
ECL 9800 must be connected to the following sensors:
Type Terminal
Outdoor temperature sensor ESMT 11 - 12
Flow temperature sensor ESMA/C/U 8 - 9
ECL 9800 is now able to control the flow temperature in relation to the outdoor
temperature.
In addition, the following sensors and remote control units can be connected.
Type Terminal
Hot water service temperatur sensor ESMB/-U 7 - 9
Temperature sensor
ESMA/-B/-C/-U 10 - 11
(used as thermometer)
Return temperature sensor ESMA/C/U 4 - 6
Room temperature sensor ESMR 4 - 5
or
Remote control unit with built-in
ESMF 3 - 4
room sensor
or
Control panel ECA 9020 with time,
switch, optimizer and room sensor.
ECA 9020 1 - 2
The ECA 9020 will also show actual
and calculated system temperatures.
Override module for time control override.
The override contact is connected
ECA 9010 1 - 2 - (5/6/7)
to the override module
Cable cross-section: 0,4 - 1,5 mm
2
Max. length: 50 m
Total max. length (sensor and BUS
cable): 150 m.
If the total max. length is exceeded the
system can be sensitive to electrical noise.
Please note
Cable resistance between sensor and
controller might produce an incorrect
measurement. A resistance of 4 ohm
corresponds to an increase of 1 degree
in the registered temperature. All boiler
stages are cut-in if the flow temperature
sensor is cut or short-circuited.
BC-HM VI.76.X4.02 © Danfoss 10/97 7
Master/slave units
ECL 9800 can be connected to other
ECL controllers via the BUS (the number
of controllers depends on the ECL type).
The MASTER controller is the weather
compensator, connected to the outdoor
sensor. SLAVE controllers are not
connected to an outdoor sensor, but
receive outdoor temperature signals from
the BUS.
ECL 9800 can operate as MASTER-
controller with the following functions:
- transmits the outdoor temperature
signal to the SLAVE-controllers.
- transmits time switch signals to the
SLAVE-controllers.
- transmits "hot-water-service"-signal to
the SLAVE-controllers at service
water heating
- receives reference temperature
signals from the SLAVE-controllers.
The SLAVE-controllers function as
mixing controls and the MASTER
controls the flow temperature in
relation to the highest mixing
temperature value
- supplies voltage to the BUS and
control panel ECA 9020, if any.
Please note
At "total stop" (digital setting P8.4) the
MASTER-controller does not operate in
relation to the reference temperature
signal from the SLAVE-controller.
ECL 9800 can operate as SLAVE-
controller with the following functions:
- All SLAVE-controllers receive outdoor
temperature signals from the BUS
- Time control either via the built-in time
switch in the SLAVE or in the
MASTER controller
- Time control via the control panel
ECA 9020
- Boost heating can be activated
Other ECL controls operating as SLAVE-
controller:
- Receive outdoor temperature signals
from the BUS
- Time control either via the built-in time
switch in the SLAVE controller or in
the MASTER controller
- Time control via the ECA 9020
- Boost function can be activated on
controllers with display
- Addressed mixing controls transmit
reference temperature signal to the
MASTER controller
Specific control of more than
4 boiler stages (max. 12 boiler stages):
The first SLAVE controller (stages 5 to 8)
must
not
be connected to a flow sensor
but has to be adressed to "7".
(See digital setting P9.5).
The second SLAVE controller (stages 9
to 12) must
neither
be connected to a
flow sensor but has to be adressed to
"8".
(See digital setting P9.5)
Number of boiler stages
:
Set number of
boiler stages and sequence type in P9.4.
NOTE: SLAVE controllers must be in
position.
8 VI.76.X4.02 © Danfoss 10/97 BC-HM
ECL 9800 mode of operation
The required flow temperature is
calculated from the outdoor temperature
and the set heat curve. The value is
called T
ref
.
T
ref
lies within a differential (e.g. 8
degrees). This means that a boiler stage
is cut-in when the actual (T
act
) flow
temperature is half the differential
(4 degrees) below T
ref
.
Correspondingly, a boiler stage is cut-out
when the actual flow temperature is half
the differential (4 degrees) over T
ref
.
Provided the actual flow temperature does
not differ from T
ref
by more than 20 degrees,
temperature changes of more than 1
degree per minute is registered and no
further boiler stage is cut-in or cut-out.
If the change is less than 1 degree per
minute, the next boiler stage is cut-in or
cut-out. The interval between a cut-in
and the next cut-in or a cut-out and the
next cut-out must be set in P7.4.
A number of boiler stages are cut-in or
cut-out when the actual flow temperature
is more than 20 degrees from T
ref
.
The interval between a cut-in and the
next cut-in or a cut-out and the next cut-
out must be set in P7.5.
Sequence change
With sequence control of four stages the
order is 1-2-3-4. At the first sequence
change the order becomes 2-3-4-1, at
the second sequence change 3-4-1-2,
and so on. A sequence is changed every
24
th
hour after power has been
connected to the controller and when a
stage is cut-out.
Hot-water-service function
ECL 9800 can control a boiler system
with hot-water service circuit. The output
for pump or changeover valve is
activated in selecting number of boiler
stages + 1. The number of boiler stages
can be 1 - 11. At hot-water-service
demand, i.e. when service water is to be
heated, the boiler temperature must be
higher than the required hot-water-
service temperature.
Setting system examples 4 og 5
(3 boiler stages and HWS):
P9.4 right digit: either “3”(sequence
change) or “5” (fixed sequence)
P4.2 required hot-water temperature,
e.g. 55 °C
P4.4 charge temperature, i.e. the
temperature difference between
the boiler temperature and the
required hot-water-service
temperature. The boiler
temperature must be higher than
the hot-water-service temperature,
example 20 K.
P4.5 Cut-in and cut-out difference of the
hot-water-service temperature,
e.g. 6 K
Hot-water demand
When the hot-water-service temperature
is below 52 °C, formula: P4.2 - (0.5 ×
P4.5), pump or changeover valve is
activated.
The reference temperature for boiler
circuit is now 75 °C (= 55 °C + P4.4)
The boiler is cut-in to ensure a boiler
temperature of 75 °C.
The boiler water heats the service water.
When the hot-water-service temperature
exceeds 58 °C, formula: P4.2 +
(0.5 × P4.5), pump or changeover valve
is cut-out.
System example 4 (hot-water priority):
When the hot-water cylinder temperature
is below the required value, the change-
over valve is activated. The difference
between required value and boiler
temperature is selected in setting P4.4
NOTE: Change-over valve, setting in
P8.5.
BC-HM VI.76.X4.02 © Danfoss 10/97 9
System example 5 (hot-water priority):
When the hot-water cylinder temperature
is below the required value, boiler circuit
pump is cut-out and cylinder pump is cut-
in. The difference between required
value and boiler temperature is selected
in setting P4.4
Override function with ECA 9010
Time control af heating and hot-water
circuit, respectively can be overridden
via the override module ECA 9010.
The function switch on ECL 9800 must
be in position
. ECA 9010 can
override to normal or reduced
temperature operation.
Setting: See digital setting, P.8.2.
Connection: See ECA 9010 instruction.
Frost protection and pump control
The circulation pump is cut-in when
- the outdoor temperature is lower
than 2 °C
- required flow temperature is higher
than 20 °C
Safety function
When flow temperature exceeds 95 °C,
boiler stages are cut-out one by one
every 5
th
sec. until flow temperature is
below 95 °C
Control settings
User settings
a) Program time switch
(analog or digital)
b) Display
c) Temperature setting
d) Function switch
e) User guide
a) Program time switch
The program time switch must be set for
the required normal and reduced
temperature periods by pushing the
riders towards the centre in the periods
during which reduced temperature is
required.
There is a special user guide for the
digital time switch.
b) Display
On turning the switch concealed behind
the cover plate, the display will show the
operating condition and system
temperatures (see function testing and
installer settings).
c) Temperature setting
The function of the temperature setting
button depends on the setting P8.4, right
digit and whether a room sensor is
connected or not. In P8.4 you can
choose between weather compensation
with max. room temperature setting and
adaptive room reference temperature
control.
Weather compensation without room
sensor
Flow temperature in the boiler 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
the parallel displacement:
Temperature Parallel displacement of heat
setting curve for different heat curve
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
10 VI.76.X4.02 © Danfoss 10/97 BC-HM
normal temperature. Hot-water-
service control remains unchanged.
Manual operation
All control and safety functions
stopped, but the circulation pump is
constantly cut-in. The boiler stages
are cut-out at intervals of 5 sec.
Follow below instruction to manually
cut-in boiler stages:
A: Remove the black cover plate
B: Turn the 10-position-switch in
position “0”. The display will
show small bars to indicate the
operation status.
C: Each press on the “SET”-button
(to the left next to the display)
will cut-in a boiler stage. The
boiler stages are cut-out at
intervals of 5 sec when the
function switch is set in position
for 3 sec and then back to
again.
>|< Heating system controlled in
accordance with preset values. All
installer settings (under cover plate)
overridden. Clock settings overriden
to normal temperature. Preset
values are given in the section
“Digital settings” in the column
marked >|<.
e) User guide
The slot under the time switch houses a
short user guide.
Weather compensation with room sensor
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, right
digit. "0" will not reduce the flow
temperature whereas "9" will result in a
max. reduction of the flow temperature.
Adaptive room reference temperature
control
The heat curve is automatically adapted
to the heat demand. The room
temperature can be increased and
reduced with the temperature setting
knob. The setting range for room
temperature is 22 ±8 °C. The knob mid-
position can be changed in positon P5.2
(see digital settings). The influence of the
room temperature on the change of flow
temperature is called the amplification
factor. The amplification factor can be
changed in position P9.2, right digit.
d) Function switch
Heat supply to radiators stopped,
but hot-water-service control
remains unchanged. The heating
system is frost-protected
Constant control in accordance with
reduced temperature.Hot-water-
service control remains unchanged.
Automatic changeover between
normal and reduced temperature as
set on time switch.
Constant control in accordance with
Potentiometer settings
f) Heat curve slope
g) Minimum flow temperature
h) Reduced temperature level
i) Return temperature
BC-HM VI.76.X4.02 © Danfoss 10/97 11
f) Setting of heat curve slope
The curve can be set in the range 0.2 - 3.4.
If a satisfactory room temperature cannot
be obtained when the outdoor tempera-
ture is less than 0 °C, the slope can be
increased by turning the potentiometer (7)
clockwise. When the outdoor tempera-
ture is more than 0 °C, the heat curve
can be parallel-displaced using knob d).
Outdoor- Radiator Floor heating
temperature* (80 °C) (55 °C)
–25 °C 1.2 0.7
–15 °C 1.6 0.9
–10 °C 1.8 1.0
Examples of heat curve settings
*Outdoor temperature for sizing. Normally the lowest
occurring outdoor temperature of the heating season
is used.
g) Minimum flow temperature
A value in the range 10 - 70°C can be set.
h) Reduced temperature level
The reduced temperature level can be set
at a fixed value (1 - 8) or at an outdoor-
temperature-dependent value (AUTO).
Each graduation on the scale corresponds
to about 1 degree in the room. Flow
temperature reduction depends on
whether or not a room sensor is installed.
Without room sensor
The heat curve is parallel-displaced
downwards with the setting on h)
multiplied by f) (heat curve).
If the setting is AUTO, the size of
reduction can be seen on the drawing
(heat curve = 1.0 has been selected).
12 VI.76.X4.02 © Danfoss 10/97 BC-HM
With room sensor
The room temperature is reduced by a
value corresponding to the setting on h).
If the setting is AUTO, the size of the
reduction can be seen on the drawing.
i) Return temperature limitation
A value in the range 10 - 70 °C can be set.
The function applies when a return
temperature sensor is installed. The flow
temperature is increased or reduced
when the return temperature becomes
greater or less than the set value.
The type of limitation can be set in P8.5
(see digital settings).
Starting up
Supply voltage is cut-in. All segments of the
display are shown for about 2 seconds.
Function testing
Status and temperature reading
Setting switch
in positions 0 - 9 enables
the display to show the status of boilers
and pump (pos. 0) and the actual heating
system temperature (pos. 1, 2, 5, and 6).
Setting Information
0 Boiler and pump status
1 Outdoor temperature
2 Flow temperature
3 Thermometer
4 Hot-water-service temperature
5 Room temperature
6 Return temperature
7 None
8 None
9 None
Status
During normal operation, when the
function switch is in position
, or ,
and
is on setting “0”, the bars in the
display will light up when boilers and
pump are cut in.
Temperatures
The sensors can be checked individually
by reading the measured temperature
(Switch
is set in the positions 1 to 6).
The normal measuring range is –60 °C
to 140 °C. Outside this range the display
shows:
– – (2 horizontal bars) for
disconnected sensor
– – – (3 horizontal bars) for short-
circuited sensor.
Setting after starting up
ECL 9800 must be set for the correct
operating conditions quite quickly:
- Sequence type: P9.5 (see digital
settings)
- Time for fast stage cut-in (P7.5)
- Time for controlled stage cut-in (P7.4)
Other settings can be adjusted as
required.
BC-HM VI.76.X4.02 © Danfoss 10/97 13
Digital settings
Display, switch and (+), (-) and SET
keys
The switch, display, (+), (-) and SET
keys can be used to check and change
some of the controller settings.
Each check and setting range has a
certain “position”. The table below shows
how to make the change between
different positions.
Row 0 - 9
← (–) Column 0 - 5 (+) →
012345
0 P0.0* P0.1* – – – P0.5
1 P1.0* P1.1* P1.2 – – –
2 P2.0* P2.1* P2.2 – – P2.5
3 P3.0* – – – P3.4 –
4 P4.0* P4.1* P4.2 P4.3 P4.4 P4.5
5 P5.0* P5.1* P5.2 – – –
6 P6.0* P6.1* – – – P6.5
7 – – – – P7.4 P7.5
8 – P8.1 P8.2 P8.3# P8.4# P8.5#
9 – – P9.2# P9.3# P9.4# P9.5#
Position selection
- Switch is used when selecting
rows 0 - 9.
- (+) and (–) keys are for selecting
columns 0-5.
- When a particular position is selected,
the display shows alternately the
position number, e.g. P1.2, and a
particular value, say 18 °C.
Note:
Access to columns 4 and 5 can only
be gained through the following procedure:
1 Select P0.3
2) Press SET for 5 seconds.
3) P0.4 (column 4) displayed.
4) It might be necessary to press (+)
(column 5).
Value changing
1) Select the required position.
2) Press “SET” once - the display flashes.
3) Change the value using (+) or (-) key.
4) Press “SET” to store the value.
If the buttons (+), (–) or the switch are
not operated within 2 min the display will
automatically show column 0.
Note
Positions marked # contain up to three
different functions. The values are
changed by choosing one digit at a time.
Press SET and the digit furthest to the
right will begin to flash. The figure can
then be changed using keys (+) and (–).
When SET is pressed again, the middle
digit can be changed. One more press
on SET and the digit farthest to the left
can be changed. All changes can be
stored by pressing SET. The display will
then show a value and position number
alternately.
Value presetting
Factory setting
>|< Basic setting
When the control function switch is
set basic setting is overridden to the
preset values, as shown in the
tables under >|<.
Values in positions marked * cannot be changed. Positions marked # contain up to three different functions.
See section on value changing.
14 VI.76.X4.02 © Danfoss 10/97 BC-HM
Position Description
P0.0 Status of boilers and pump
Bars in the display indicate whether boiler stages and pump are cut-in.
P0.1 Software generation
Generation number of control program is shown in the display.
P0.3 Access to column 4 - 5
Press SET for 5 seconds and P0.4 will flash. Column 4 and 5 are now accessible.
Position Setting of Range >|<
P0.5 Boiler outputs, inversion 0 - 1 0 -
Output options:
Normally Closed (NC)
or
Normally Open (NO)
0: NC (normal)
1: NO (inverted)
Row 0 - Status
Boiler stage 1
Boiler stage 2
Pump
Boiler stage 4
Boiler stage 3
Row 1 - Outdoor temperature
Position Description
P1.0 Actual outdoor temperature
P1.1 Accumulated outdoor temperare
Used in connection with summer cut-out P1.2
The accumulation factor is set in P9.5
Summer cut-out function is cancelled when P1.0 and P1.1 are below the P1.2-value
Position Setting of Range >|<
P1.2 Summer cut-out 10 - 30 °C 18 °C –
When outdoor temperature exceeds the set value,
automatic changeover to reduced temperature
Function is active only when function switch is
in position.
Row 2 - Boiler circuit
Position Description
P2.0 Actual flow temperature (T
act
)
P2.1 Calculated flow temperature (T
ref
)
Calculation based on outdoor temperature, heat curve setting, normal
or reduced temperature, room temperature influence, etc.
When the display shows “ - - “ it indicates that
A: flow temperature sensor is not mounted
B: function switch is in position
BC-HM VI.76.X4.02 © Danfoss 10/97 15
Row 2 - continued
Position Setting of Range >|<
P2.2 Maximum flow temperature 10 - 90 °C 80 °C 80 °C
Setting of highest permisible flow temperature
in system.
P2.5 Boiler temperature difference 1 - 25 K 8 K –
The value indicates the difference in degrees
between cut-in and cut-out.
Row 3
Position Description
P3.0 Thermometer
The sensor input can be used for supervision of other temperatures.
Position Setting of Range >|<
P3.4 Minimum time for boiler stage cut-in 0 - 30 min 1 min –
Position Description
P4.0 Actual hot water temperature
P4.1 Required hot-water-service temperature at normal and reduced operation
Required hot-water-service temperature indication at normal operation (P4.2)
or reduced operation (P4.3)
Position Setting of Range >|<
P4.2 Required hot-water-service temperature 10 - 90 °C 50 °C 80 °C
Setting the required hot-water-service
temperature at normal temperature operation
P4.3 Reduced hot-water-service temperature 10 - 90 °C 10 °C –
Setting required hot-water-service temperature
at reduced temperature operation
P4.4 Charge temperature difference - - (OFF) - - –
Setting the temperature difference between 0 - 30 K
boiler temperature and required hot-water-service
temperature
- - (OFF)
P2.1 is not influenced by the hot-water function
0 - 30 K
P2.1 = P4.4 + P4.1 + 0,5 × P2.5
P4.5 Hot-water-service temperature difference 1 - 25 6K
Setting the difference between cut-in and
cut-out temperature at service-water heating.
Row 4 - Hot-water-service function
16 VI.76.X4.02 © Danfoss 10/97 BC-HM
Row 5 - Room temperature
Position Description
P5.0 Actual room temperature
P5.1 Required room temperature
Display of required room temperature
Position Setting of Range >|<
P5.2 Maximum limitation - room temperature 10 - 30 °C 22 °C –
A) Setting the temperature at which flow
temperature limitation begins, when "Maximum
limitation" is selected in P8.4.
B) Setting displacement of the mid-position of
temperature setting knob when "Reference
room control" is selected in P8.4.
Note: Using ESMF the limit value can be
further displaced.
Position Description
P6.0 Accumulated return temperature
To achieve a stable control..
Damping factor is set in P9.5
P6.1 Required return temperature
Display showing set return temperature - potentiometer in position i)
Negative value (– visible): Min return temperature limiter
Positive value (+
not
visible): Max return temperature limiter
Display showing - - indicates that
A: return temperature sensor is not mounted
B: function selector in position
C: total stop (see P8.4, left digit)
D: service water heating active
Position Setting of Range >|<
P6.5 Influence of return temperature limitation on –9 → +9 +3 +3
flow temperature
The value determines the magnitude of change
(amplification) and the sign determines the
direction
Positive value (+) increases flow temperature
Negative value (–) decreases flow temperature
Row 6 - Return temperature
BC-HM VI.76.X4.02 © Danfoss 10/97 17
Row 7 - System time constants
Position Setting of Range >|<
P7.4 Interval between stage cut-in and cut-out 15 sec-59 min 2 min –
The value indicates the delay between stage cut-in
or cut-out when there is less than 20 degrees
between actual and required flow temperature.
The value is thus an expression of the system
response time, i.e. time which elapses from stage
cut-in and cut-out to registration via the flow sensor.
Seconds are given in the display as ss
Minutes are given in the display as mm
P7.5 Minimum interval between stage cut-in 15 sec-59 min 1 min –
or cut-out
The value indicates the time which must elapse
between fast cut-in or cut-out of stages. The
function applies only when the difference between
actual and required flow temperature is more than
20 degrees.
Seconds are given in the display as ss
Minutes are given in the display as mm
18 VI.76.X4.02 © Danfoss 10/97 BC-HM
Row 8 - Diverse function selection
000
x
x
x
000
Position Description
P8.1 Heat curve - Reading set heat curve (potentiometer, f).
Value is stabilized 2 min. after adjustment
Position Setting of Range >|<
P8.2 External override 0, 5, 6, 7
= Override of boiler circuit
= Override of hot-water-service circuit
= Override of circulation pump
ECL 9800 can be overridden by an external
time switch via one of the temperature sensor
inputs - room sensor (5), return sensor (6) or
hot-water-service sensor (7)
Override function is only active when function
function switch is in pos.
P8.3 Time switch channel 0 - 8 0
Selection of time switch channel to control boiler
circuit, hot-water-service circuit and circulation
pump. The function switch must be set in
position . ECL 9800 is controlled either by a
built-in time switch, ECA 9020 or the time switch
in the MASTER-controller. The circuit can be
selected by setting the following values:
= Boiler circuit
= Hot-water-service circuit
= Circulation pump
0 = no time control
(constant normal temperature)
1 - 8 = time control
1 = via analog or digital time switch (channel 1)
- override via ECA 9020 (channel 1)
2 = via digital time switch (channel 2) - override
via ECA 9020 (channel 2)
3 = via time switch (channel 1) in MASTER
- override via ECA 9020 (channel 3)
4 = via time switch (channel 2) in MASTER
- override via ECA 9020 (channel 4)
5 = via analog or digital time switch (channel 1)
6 = via digital time switch (channel 2)
7 = via time switch (channel 1) in MASTER
8 = time switch (channel 2) in MASTER
If the function switch is set on >|<
the ECL 9800 will not be time-controlled
x
x
x
BC-HM VI.76.X4.02 © Danfoss 10/97 19
Row 8 - continied
Position Setting of Range
P8.4
Maximum room temperature control or reference room0 or 1
control (adaptive)
Maximum room temperature limitation.
If a room sensor is connected, the room temperature
is maximum-limited at the value set in P5.2.
Adaptive reference room control
The function is based on a room sensor in the reference
room, with heat curve adapted automatically to the heat
demand. Room temperature must be set by the knob
for parallel displacement (d). The value corresponding to
knob mid-setting must be set in position P5.2
Selection of total stop in reduced temperature periods0 or 1
Minimum flow temperature maintained in both
normal and reduced temperature periods.
Minimum flow temperature maintained in normal
temperature periods only.
P8.5
Selection of limitation type for return temperature 0 or 1
Max. limitation function
If the return temperature exceeds the value set on
the front of ECL 9800, flow temperature is increased
or reduced.
(Selection in P6.5).
Min. limitation function
If the return temperature becomes lower than the
value set on the front of ECL 9800, flow temperature
is increased or reduced.
(Selection in P6.5).
Pump exercise 0 or 1
No pump exercise in periods of no heat demand
Pump exercise for 60 seconds every 72 hours in
periods of no heat demand.
Hot-water service charge pump/distribution valve 0 or 1
Systems with change-over valve. Boiler circuit pump
constantly cut-in at heat demand.
System with pump. Boiler circuit pump cut-out at
hot-water-service demand.
0
1
0
1
0
1
0
1
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1
0-0
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20 VI.76.X4.02 © Danfoss 10/97 BC-HM
Row 9 - Diverse settings
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Position Setting of Range
P9.2
Amplification factor, influence of room temperature 0 - 9
Setting of room temperature influence on boiler circuit
flow temperature. Heat curve slope has an influence
on the change.
Example:
Room temperature change is 2 degrees.
A heat curve of 1.8 has been selected and the ampli-
fication factor is set on 4, i.e. 2 × 1,8 × 4 corresponds to
a flow temperature change of 14.4 degrees.
Boiler operating factor 0 - 9 K
Indicates the number of degrees the flow temperature
must lie above a reference signal from any connected
ECL controller that controls a mixing temperature.
P9.3
Boost after reduced temperature periods 0 - 9
Setting of the percentage by which the flow temperature
must be increased during the first hour after a reduced
temperature period.
0 - 9 corresponds to 0 - 90 % increase.
P9.4
Sequence type 0 - 9
The number corresponds to the different principles with which
several boiler stages can be controlled
2 boilers in sequence and automatic sequential switching
2 boilers in fixed sequence
2 two-stage boilers in sequence and automatic
sequential switching
3 boilers in sequence and automatic sequential switching
1 fixed boiler and 2 boilers in sequence with
automatic sequential switching
3 boilers in fixed sequence
4 boilers in sequence and automatic sequential switching
1 fixed boiler and 3 boilers in sequence with
automatic sequential switching
2 fixed boilers and 2 boilers in sequence with
automatic sequential switching
4 boilers in fixed sequence
When the hot-water-service function is cut-in, ECL 9800 can
control only 3 boiler stages.
Note: An ECL 9800 acting as SLAVE controller is not to be programmed in P9.4.
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