Danfoss ECL Comfort 210 Operating Manual page 10

Operating Guide
A247, 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.
Holiday programs are present for Heating and DHW circuits.
Besides, a holiday program is present for the entire controller.
Exercise of circulation pumps and control valve in periods without
heating 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. The ECL controllers in the ECL 485 system
can work in master-slave system.
Unused input can, by means of an override switch, be used
to override the schedule to a fixed 'Comfort', 'Saving', 'Frost
protection' or 'Constant temperature' mode.
Modbus communication to a SCADA system can be established.
The M-bus data (ECL Comfort 310) can furthermore be transferred
to the Modbus communication.
Alarm:
A247.1:
Alarm A1 (= relay 4) can be activated:
• if the actual flow temperature differs from the desired flow
temperature
• if a temperature sensor or its connection disconnects / short
circuits. (See: Common controller settings > System > Raw
input overview)
A347.1, A347.2, A347.3:
Alarm A1 (= relay 6) can be activated:
• if the actual flow temperature differs from the desired flow
temperature
• if a temperature sensor or its connection disconnects / short
circuits. (See: Common controller settings > System > Raw
input overview)
When the A247 has been uploaded the ECL Comfort controller
starts in Manual mode. This can be used for checking the controlled
components for correct functionality.
10 DEN-SMT/DK
ECL Comfort 210 / 310, application A247 / A347
Typical A247.2 application, example a:
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 / 310 Electronic controller ECL Comfort 210 or 310
S1
Outdoor temperature sensor
S2 DHW return temperature sensor, circuit 2
S3 Flow temperature sensor, circuit 1
S4 DHW flow temperature sensor, circuit 2
S5 Return temperature sensor, circuit 1
S6 DHW tank temperature sensor, upper
S7 Flow / energy meter (pulse signal)
S8
DHW tank temperature sensor, lower
P1 Circulation pump, heating, circuit 1
P2 DHW heating pump, circuit 2
P3 Circulation pump, DHW, circuit 2
P4 DHW charging pump, circuit 2
M1
Motorized control valve (3-point controlled),
circuit 2
Alternative: Thermo actuator (Danfoss type ABV)
M2
Motorized control valve (3-point controlled),
circuit 1
Alternative: Thermo actuator (Danfoss type ABV)
A / B
Internal / external connections for DHW circulation
VI.LG.S3.02
Danfoss District Energy