Danfoss ECL Comfort 296 Operating Manual page 8

Operating Guide ECL Comfort 210/296/310, application A230
A230, in general:
Up to two Remote Control Units, ECA 30 / 31, can be connected to
one ECL controller in order to control the ECL controller remotely.
Exercise of circulation pumps and control valve in periods without
heating or cooling demand can be arranged.
Additional ECL Comfort controllers can be connected via the ECL
485 bus in order to utilize common outdoor temperature signal,
time and date signals.
Several ECL controllers, internally connected via ECL 485 bus, work
in Master / Slave connection. In a Master / Slave system maximum
2 ECA 30 / 31 can be present.
An unused input can, by means of an override switch, be used to
override the schedule to a fixed:
(A230.1 and A230.4):
'Comfort' , 'Saving' , 'Frost protection' or 'Constant temperature'
mode
(A230.2):
'Comfort' or 'Saving' mode
Modbus communication to a SCADA system can be established.
The M-bus data (ECL Comfort 296 / 310) can furthermore be
transferred to the Modbus communication.
Alarm
A230.1:
Alarm A1 (= relay 4) can be activated if:
• the actual flow temperature differs from the desired flow
temperature.
• a temperature sensor or its connection disconnects / short
circuits. (See: Common controller settings > System > Raw
input overview).
A230.2:
Alarm relay 4 is not used, but a temperature sensor or its
connections can be monitored.
(See: Common controller settings > System > Raw input overview).
A230.4:
Alarm A1 (= relay 4) can be activated if:
• the actual flow temperature differs from the desired flow
temperature.
• the actual pressure is not inside an acceptable pressure range
• a temperature sensor or its connection disconnects / short
circuits. (See: Common controller settings > System > Raw
input overview).
A measured temperature can be offset adjusted, if needed.
Input configuration
Inputs (as from S7 and up) which are not part of the application can
be configured to be Pt 1000, 0 - 10 Volt, frequency (pulse counter)
or Digital input. This feature makes it possible in ECL 296 / 310 to
communicate extra signals, such as temperatures, pressures, ON /
OFF conditions, via Modbus and ECL Portal.
The configuration is done by means of the ECL Tool (free software
for download) or directly in a dedicated menu in the ECL Portal or
the connection for Modbus (BMS / SCADA).
8 | © Danfoss | 2017.05
Typical A230.4 application:
The shown diagram is a fundamental and simplified example and does
not contain all components that are necessary in a system.
All named components are connected to the ECL Comfort controller.
List of components:
ECL 210 / 296 Electronic controller ECL Comfort 210, 296 or 310
/310
S1 Outdoor temperature sensor
S2 (Optional) Room temperature sensor / ECA 30
S3
Flow temperature sensor,
S4
(Optional) DHW flow temperature sensor (read-out
only)
S5 (Optional) Return temperature sensor
S6 (Optional) DHW circulation return temperature
sensor (read-out only)
S7 (Optional) Flow / energy meter (pulse signal)
S8 (Optional) 0 - 10 Volt signal from pressure sensor
Alternative: 0 - 10 Volt signal for external setting of
desired flow temperature
P1 Circulation pump, heating
M1
Motorized control valve, 3-point controlled
Alternative 1: Control valve, thermo-actuator
controlled (Danfoss type ABV)
Alternative 2 (ECL 310 with ECA 32): Motorized
control valve, 0 - 10 Volt controlled
A1
Alarm
VI.LG.H4.02