Danfoss ECL Comfort 310 Operating Manual page 9

Operating Guide ECL Comfort 310, application A377
Charging stop, DHW tank with 1 temperature sensor:
When the measured DHW temperature S6 gets higher than
the charging-stop temperature, the DHW charging pump P2 is
switched OFF. A post-run time can be set.
Charging stop, DHW tank with 2 temperature sensors:
When the measured DHW temperature S6 gets 2 K higher than
the charging-start temperature AND the lower tank temperature
S8 gets higher than the charging-stop temperature, the DHW
charging pump P2 is switched OFF. A post-run time can be set.
DHW circulation:
In charging applications the DHW circulation can be through
the DHW tank (connection A) or through the heat-exchanger
(connection B).
The solution with connection A results in closing of the motorized
control valve after the DHW tank charging procedure.
The solution with connection B stops the DHW charging pump
after the DHW tank charging procedure. The temperature at the
charging temperature sensor is maintained according to the value
of the desired DHW temperature in order to compensate for the
heat loss in the DHW circulation pipe.
Flow / power limitation
A connected flow or energy meter based on M-bus signal can limit
the flow or power to a set maximum value.
An anti-bacteria function is available for activation on selected
days of the week.
The DHW circulation pump P3 has a week schedule for up to 3
ON-periods per day.
VI.GU.F6.02
Typical A377.2 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 310 Electronic controller ECL Comfort 310
S1 Outdoor temperature sensor
S2 Return temperature sensor, circuit 2
S3 Flow temperature sensor, circuit 1
S4 Flow temperature sensor, circuit 2
S5 Return temperature sensor, circuit 1
S6 DHW tank temperature sensor, upper
(S7) (External temperature control, not illustrated)
S8 DHW tank temperature sensor, lower
S9 DHW heating temperature sensor, circuit 3
S10 DHW charging temperature sensor, circuit 3
M1 Motorized control valve (3-point controlled), circuit 3
Alternative: Thermo actuator (Danfoss type ABV)
M2 Motorized control valve (3-point controlled), circuit 1
Alternative: Thermo actuator (Danfoss type ABV)
M3 Motorized control valve (3-point controlled), circuit 2
Alternative: Thermo actuator (Danfoss type ABV)
P1 DHW heating pump
P2 Circulation pump, heating, circuit 1
P3 DHW circulation pump
P4 DHW charging pump
P5 Circulation pump, heating, circuit 2
A1 Alarm
A / B Internal / external connections for DHW circulation
Charging-stop temperature:
Desired DHW temperature + Stop difference.
Example, S6 only:
50 °C + (3 K) = 53 °C
Example, S6 and S8:
50 °C + (-8 K) = 42 °C
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