Danfoss ECL Comfort 210 Installation Manual page 17

Installation Guide
The application A375.3 is very flexible. These are the basic
principles:
DHW (circuit 3):
By means of a week schedule (up to 3 'Comfort' periods / day), the
DHW circuit can be in 'Comfort' or 'Saving' mode (two different
temperature values for desired DHW temperature)
.If the measured DHW temperature (S6) is lower than the desired
DHW temperature, the DHW heating procedure starts:
• The circulation pump P1 in the heating circuit is switched OFF
• The DHW heating pump P3 is switched ON
• The desired boiler temperature at S3 is increased.
The desired boiler temperature is typically 10-15 degrees higher
than the desired DHW temperature.
When the measured DHW temperature (S6) gets higher than the
desired DHW temperature, the DHW heating pump (P3) is switched
OFF. Start and stop differences determine the ON / OFF control. A
post-run time can be set.
An anti-bacteria function is available for activation on selected
days of the week.
The DHW heating can have priority, i.e. pump P3 is ON and pump
P1 is OFF. If the application has a changeover valve (priority valve)
for the DHW heating, the circulation pump P1 is still ON during
DHW heating.
Danfoss District Energy
ECL Comfort 210 / 310, application A275 / A375
Typical A375.3 application:
S 1
S 3
B1 B8
S 5
* Pressure relief valve
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:
S1 Outdoor temperature sensor
S2 Return temperature sensor, circuit 2
S3 Common boiler temperature sensor, circuit 1
S4
Flow temperature sensor, circuit 2
S5 Return temperature sensor, circuit 1
S7 Room temperature sensor / ECA 30, circuit 1
S8 Room temperature sensor / ECA 30, circuit 2
(S10) (External temperature control, not illustrated)
M2 Motorized control valve, circuit 2
P1 Circulation pump, circuit 1
B1–B8 Burner 1 ... 8
P3
DHW heating pump, circuit 3
A1 Alarm
The controller is pre-programmed with factory settings that are shown
in the relevant chapters of this guide.
VI.GU.L1.02
ECL 310
A1
+ ECA 32
S 4
P 4
S 2
P 1
S 6
P 3
DEN-SMT/DK
S 8
S 7
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